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AU2018102133A4 - Buffering agent for balancing pH of fabric and preparation method of buffering agent - Google Patents

Buffering agent for balancing pH of fabric and preparation method of buffering agent Download PDF

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AU2018102133A4
AU2018102133A4 AU2018102133A AU2018102133A AU2018102133A4 AU 2018102133 A4 AU2018102133 A4 AU 2018102133A4 AU 2018102133 A AU2018102133 A AU 2018102133A AU 2018102133 A AU2018102133 A AU 2018102133A AU 2018102133 A4 AU2018102133 A4 AU 2018102133A4
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buffering agent
salt
fabric
added
aqueous solution
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AU2018102133A
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Hongxia Chen
Qingqing HU
Peng Lu
Hongsheng YUAN
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Jiangsu Goldsun Textile Science and Technology Co Ltd
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Jiangsu Goldsun Textile Science and Technology Co Ltd
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/52—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
    • D06P1/5207—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • D06P1/525—Polymers of unsaturated carboxylic acids or functional derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/04—Acids; Metal salts or ammonium salts thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/07—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with halogens; with halogen acids or salts thereof; with oxides or oxyacids of halogens or salts thereof
    • D06M11/11—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with halogens; with halogen acids or salts thereof; with oxides or oxyacids of halogens or salts thereof with halogen acids or salts thereof
    • D06M11/13—Ammonium halides or halides of elements of Groups 1 or 11 of the Periodic Table
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/51—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with sulfur, selenium, tellurium, polonium or compounds thereof
    • D06M11/55—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with sulfur, selenium, tellurium, polonium or compounds thereof with sulfur trioxide; with sulfuric acid or thiosulfuric acid or their salts
    • D06M11/56—Sulfates or thiosulfates other than of elements of Groups 3 or 13 of the Periodic Table
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
    • D06M13/165—Ethers
    • D06M13/17—Polyoxyalkyleneglycol ethers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/60—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing polyethers
    • D06P1/613—Polyethers without nitrogen
    • D06P1/6131—Addition products of hydroxyl groups-containing compounds with oxiranes
    • D06P1/6133—Addition products of hydroxyl groups-containing compounds with oxiranes from araliphatic or aliphatic alcohols
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/673—Inorganic compounds
    • D06P1/67333—Salts or hydroxides
    • D06P1/6735—Salts or hydroxides of alkaline or alkaline-earth metals with anions different from those provided for in D06P1/67341
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/673—Inorganic compounds
    • D06P1/67333—Salts or hydroxides
    • D06P1/6735—Salts or hydroxides of alkaline or alkaline-earth metals with anions different from those provided for in D06P1/67341
    • D06P1/67358—Halides or oxyhalides
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/673—Inorganic compounds
    • D06P1/67333—Salts or hydroxides
    • D06P1/6735—Salts or hydroxides of alkaline or alkaline-earth metals with anions different from those provided for in D06P1/67341
    • D06P1/67375—Salts or hydroxides of alkaline or alkaline-earth metals with anions different from those provided for in D06P1/67341 with sulfur-containing anions
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
    • D06P3/58—Material containing hydroxyl groups
    • D06P3/60—Natural or regenerated cellulose
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F120/00—Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
    • C08F120/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F120/04—Acids; Metal salts or ammonium salts thereof
    • C08F120/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/52—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
    • D06P1/5207—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • D06P1/525—Polymers of unsaturated carboxylic acids or functional derivatives thereof
    • D06P1/5257—(Meth)acrylic acid

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Coloring (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

Abstract The present invention discloses a buffering agent for balancing pH of fabric and a preparation 5 method of the buffering agent. The buffering agent is composed of a mixed aqueous solution of carboxylic polymers and salt of carboxylic acid, inorganic salt and a penetrating agent, and water is used as a solvent, wherein a weight ratio of the mixed aqueous solution of the carboxylic polymers and the salt of carboxylic acid to the inorganic salt to the penetrating agent is (35 to 45): (5 to 8): (8 to 10), and a solid content is 30 to 40%. According to the preparation method of the 10 buffering agent, a mixture aqueous solution of carboxylic acid and salt thereof is added into deionized water to be stirred uniformly, then a penetrating agent is added, uniform stirring is performed, finally, inorganic salt is added, uniform stirring is performed, deionized water is added for supplementing till the solid content is 30% to 40%, and then the buffering agent can be prepared after standing is performed for 24 h. The buffering agent can perform neutralization and 15 adjust a pH value of a cloth cover in a spinning, dyeing and finishing processing process, a pH value of finished fabric in a storing process is maintained, colored light of the fabric after being treated is free of changing, and the cloth cover is also free of peculiar smells.

Description

Buffering Agent for Balancing pH of Fabric and Preparation Method of Buffering Agent
Technical Field
The present invention relates to the technical field of dyeing and finishing of fabric, and more particularly relates to a buffering agent for balancing pH of fabric and a preparation method of the buffering agent.
Background Art
Since ancient times, textile fabric has been a necessity of social life of human all the time, along with development of the society, the demand for the fabric has been derived from the most basic warm-keeping requirement to the safety requirement. In the national mandatory testing standard, a pH value of the fabric has already become a mandatory index to be executed. Under normal conditions of a human body, a pH value on the surface of the human body is weakly alkaline. Under general conditions, survival of bacteria can be suppressed only in a weakly acidic environment. If the pH value of the textile fabric is greatly different from the pH value of the surface of human skin, adverse effects can be generated on the human body, and direct stimulation is generated on the human skin. A too high pH value can generate a stimulating effect on the skin, cause scytitis, and cause injuries to the sweat gland system and nervous system of the human body, especially for articles for use of children and infants.
In a printing and dyeing processing process of the fabric, such as boiling off, mercerizing, printing or dyeing, an alkaline agent or acidic agent is added, especially for all-cotton fabric, a using amount of the alkaline agent is very large, and thus in order to control a pH value of finished fabric, acid is commonly added for neutralization. Because acidity of inorganic acid is very high, and reaction is violent, organic acid weak in acidity and gentle in reaction is commonly selected for performing neutralization in factories, common organic acid is formic acid, acetic acid, citric acid and the like, but formic acid has high acidity and reducibility, colored light of the fabric is
2018102133 01 Aug 2018 prone to changing (such as reddish), fabric neutralized by acetic acid can easily generate large acidic flavor, a cloth cover of fabric neutralized by citric acid is prone to yellowing, especially, colored light of some active dye containing metal is affected, and certain damage is caused to bonding strength. A buffering solution composed of organic acid and organic acid salt is also selected, but buffering capacity of the buffering solution is limited, and an expected effect cannot be achieved. However, when a buffering system composed of small molecule organic acid or organic acid and salt thereof is adopted, several common defects exist: firstly, a penetrating and neutralizing speed of the organic acid is low, the phenomenon is especially obvious for heavy fabric and fabric high in cloth cover alkalinity, time for the fabric to pass through a work liquid tank of a setting machine is only 1 to 3 s, and a reaction cannot be completed very fast. If it is needed to guarantee that a final pH value meets a requirement, increasing of a using amount of acid is only, surface peracid is caused, an internal pH value is still very high, and the gloss that a finished fabric pH is qualified is caused. Secondly, after organic acid and alkali remaining on the fabric are neutralized, a buffering system of organic acid and salt thereof is formed on the fabric temporarily, after the fabric is stored for a certain period of time, organic acid on the fabric is volatilized, only salt of organic acid exists, and at the moment, a pH value of a cloth cover of the fabric is alkaline and not qualified. Thirdly, during ionization of the organic acid, only partial ionization happens, when the using amount is very high, the pH value of the organic acid changing is not obvious, and therefore damage of bonding strength is caused easily under high-temperature setting or high tensile force.
Summary of the Invention
The present invention aims to provide a buffering agent for balancing pH of fabric and a preparation method of the buffering agent. The buffering agent can perform neutralization and adjust a pH value of a cloth cover in a spinning, dyeing and finishing processing process, a pH value of finished fabric in a storing process is maintained, colored light of the fabric after being treated is free of changing, and the cloth cover is also free of peculiar smells.
The buffering agent for balancing pH of the fabric is composed of a mixed aqueous solution of carboxylic polymers and salt of carboxylic acid, inorganic salt and a penetrating agent, and water is used as a solvent, wherein a weight ratio of the mixed aqueous solution of the carboxylic
2018102133 01 Aug 2018 polymers and the salt of carboxylic acid to the inorganic salt to the penetrating agent is (35 to 45): (5 to 8): (8 to 10), and a solid content is 30 to 40%.
Further, the mixed aqueous solution of the carboxylic polymers and the salt of carboxylic acid is prepared through the following steps:
step 1, a cratonic acid solution with a concentration being 0.1 mol/L is prepared from deionized water, meanwhile, ammonium persulfate is added into the solution, concentration of ammonium persulfate is 0.001 mol/L, and a cratonic acid mixed solution is obtained;
step 2, temperature of 500 mL of the deionized water rises to 50 to 60°C, 80 mL of the cratonic acid mixed solution in step 1 and 20 mL of an 0.05 mol/L acrylic acid aqueous solution are sequentially added dropwise, adding and stirring are performed at the same time, after adding dropwise is completed, temperature rises to 80 to 90°C, heat preserving stirring is performed for 0.5 to 1 h, 5 mL of an 0.005 mol/L polymerization inhibitor is added dropwise, heat preserving stirring continues to be performed for 4 to 5 h, and a carboxylic polymer aqueous solution with a weight-average molecular weight being 800 to 1500 is obtained; and step 3, 0.01 mol/L sodium hydroxide or potassium hydroxide solution is added dropwise into the carboxylic polymer aqueous solution prepared in step 2, a molar ratio of carboxylic acid to carboxylate in a system is adjusted to be (50 to 65): (50 to 35), and the mixed aqueous solution of the carboxylic polymers and the salt of carboxylic acid is prepared.
Further, a dropping speed of the crotonic acid mixed solution in step 2 is 16 to 20 drops/min, and a dropping speed of the acrylic acid solution is 4 to 5 drops/min.
Further, the inorganic salt is sodium chloride or sodium sulfate.
Further, the penetrating agent is isooctyl alcohol polyoxyethylene ether, and a quantity of oxyethylene groups is 3 to 5.
According to the preparation method of the buffering agent for balancing pH of the fabric, a mixture aqueous solution of carboxylic acid and salt thereof is added into deionized water to be stirred uniformly, then a penetrating agent is added, uniform stirring is performed, finally, inorganic salt is added, uniform stirring is performed, deionized water is added for supplementing till the solid content is 30% to 40%, and then the buffering agent can be prepared after standing is performed for 24 h.
All-cotton or cotton-containing fabric still dominates all fabric, in the dyeing and finishing
2018102133 01 Aug 2018 processing process of the all-cotton or cotton-containing fabric, lots of alkaline agents are commonly needed, for example, caustic soda high in concentration is needed in pretreatment boiling off and mercerizing, and is mainly used for removing impurities and a small molecule sizing agent on cotton fiber. In the mercerizing process, cotton fiber can be swollen by mercerizing so that very good luster and size stability are achieved. In the dying or printing process, sodium carbonate is also needed to perform fixation on active dye. Thus it can be seen that in main links of dying and finishing, the alkaline agent is inevitable to use. Although in each process, the alkaline agent in the fabric is removed by water washing, but the alkaline agent and hydroxyl radical on cellulose fiber react to generate alkali cellulose, in addition, water washing time is short, if alkali removing in the processes is not thorough, a pH value of the cloth cover is certainly high, and pH control difficulty of a soft setting process is increased.
The buffering agent of the present invention can fast penetrate into the fabric, and meanwhile, the buffering agent and the cellulose fiber have good appetency, so that the buffering agent can maintain pH of the cloth cover all the time. Inorganic salt sodium chloride or sodium sulfate can form a double-electrode layer on the cloth cover, electronegativity on the surface of the cellulose fiber is shielded, so that carboxylic acid type small-molecule polymers can avoid electrostatic repulsion and can be fast adsorbed onto the surface of the fabric, in addition, the molecular weight is large, and adsorbing capacity can be better; isooctyl alcohol polyoxyethylene ether can moisten the cloth cover very well, so that the carboxylic acid type small-molecule polymers can fast penetrate to the interior from the surface; meanwhile, inorganic salt sodium chloride or sodium sulfate can provide proton exchanging, so that carboxylic acid-containing type small-molecule polymers and salt thereof can be updated continuously, that is, balance of the carboxylic acid or carboxylate can be kept all the time, and pH can be maintained at 5.0 to 6.5. Various auxiliaries cooperate with and promote each other in the whole process, and pH of the fabric can be adjusted very well. Meanwhile, the carboxylic acid type small-molecule polymers still have a high average molecular weight, high Van der Waals’s force and hydrogen bonds exist between the carboxylic acid type small-molecule polymers and the cellulose fiber, and thus, the carboxylic acid type small-molecule polymers can still stably exist on the fabric, which appears to be particularly important in the storing process.
Beneficial Effects
2018102133 01 Aug 2018
The buffering agent of the present invention can perform neutralization and adjust the pH value of the cloth cover in the spinning, dyeing and finishing process, and can very well neutralize alkali of the cloth cover in pretreatment scouring and bleaching, mercerizing and printing water washing; especially, the buffering agent can fast penetrate and fast neutralize alkali of the cloth cover in soft setting, no affects are generated on colored light on dyed or printed fabric, and the bonding strength of the fabric is not affected; and in the long time storing process of the fabric, stability of the pH value in the fabric storing process is maintained.
Detailed Description of the Invention
A preparation method of carboxylic acid and carboxylate thereof:
step 1, a crotonic acid mixed solution is prepared: a crotonic acid solution with a concentration being 0.1 mol/L is prepared from deionized water, meanwhile, ammonium persulfate is added into the solution, the concentration of ammonium persulfate in a system is 0.001 mol/L, and finally the crotonic acid mixed solution is obtained;
step 2, 500 mL of deionized water is added into a 1000 mL round-bottom flask, temperature rises to 50 to 60°C, 80 mL of an 0.1 mol/1 crotonic acid mixed solution and 20 mL of an 0.05 mol/L acrylic acid aqueous solution (prepared from deionized water) are respectively added dropwise at the same time, a dropping speed of the crotonic acid mixed solution is 16 to 20 drops/min, a dropping speed of the acrylic acid aqueous solution is 4 to 5 drops/min, adding dropwise and stirring are performed at the same time, after adding dropwise of the two solutions is completed, temperature rises to 80 to 90°C, after heat preserving stirring continues to be performed for 0.5 to 1 h, 5 mL of an 0.005 mol/L polymerization inhibitor is added dropwise into the round-bottom flask, after heat preserving stirring continues to be performed for 4 to 5 h, and then a carboxylic polymer aqueous solution with a weight-average molecular weight being 800 to 1500 is obtained; and step 3, a 0.01 mol/L sodium hydroxide or potassium hydroxide solution is added dropwise into the carboxylic polymer aqueous solution prepared in step 2, a molar ratio of carboxylic acid to carboxylate in the system is adjusted to be (50 to 65): (50 to 35), and a mixture aqueous solution containing the carboxylic acid and the salt thereof is prepared.
A preparation method of the buffering agent (called a buffering agent for short hereinafter)
2018102133 01 Aug 2018 for balancing pH of the fabric:
Method of preparation: 40 parts of the mixture aqueous solution of the carboxylic acid and salt thereof is added into 20 parts of deionized water to be slowly stirred uniformly, then 10 parts of a penetrating agent is added, and uniform stirring is performed slowly at normal temperature; finally, 8 parts of inorganic salt is slowly scattered into the solution in batches, after uniform stirring is achieved when scattering and fast uniform stirring are performed, a remaining amount of water is complemented, and then the buffering agent can be prepared after standing is performed for 24 h.
Formula of the buffering agent:
Mixture of carboxylic acid and salt thereof 40 parts
Penetrating agent 10 parts
Sodium chloride 8 parts
Water remaining amount
Performance:
Appearance: faint yellow viscose liquid pH: 5.0 to 6.5
Solid content: 30 to 32%
Processing process of the fabric:
All-cotton fabric is subjected to processing including singeing, desizing, boiling off, bleaching, stentering, mercerizing, stentering whitening, printing, ageing, water washing, soft setting and the like. According to the following embodiments, the buffering agent is added into the boiling off process in embodiment 1, the buffering agent is added into the mercerizing process in embodiment 2, the buffering agent is added into the water washing process after printing in embodiment 3, and the buffering agent is added during soft setting in embodiment 4.
Embodiment 1
40s all-cotton satin weave printed fabric is subjected to boiling off by adopting a boiling and bleaching two-segment method, wherein caustic soda in the boiling-off process is 40 to 50 g/L, a refining agent is 8 to 10 g/L, a chelation dispersing agent is 5 g/L, steaming at 102°C is performed for 60 min, and 8 g/L buffering agent is added into a third water washing tank after going out of a boiling-off steaming box; and in the bleaching process, 100% of 3 to 4 g/L hydrogen peroxide is
2018102133 01 Aug 2018 added, and 6 g/L hydrogen peroxide stabilizing agent is added.
Embodiment 2
60s all-cotton satin weave fabric is subjected to mercerizing by adopting a straight roller mercerizing machine, concentration of mercerizing alkali is 220 g/L, 5 g/L acetic acid is added into a third water tank of a mercerizing water washing machine, and 20 g/L buffering agent is added into a last but one water washing tank.
Embodiment 3
In the water washing process after 32s all-cotton satin weave printed fabric is printed, the buffering agent of the present invention is added into a fifth water washing tank and a last but one water washing tank of a water washing machine, wherein 8 g/L buffering agent is added into the fifth water washing tank, and 5 g/L buffering agent is added in the last but one water washing tank, and remaining processes in the remaining water washing process are the same as a normal water washing process.
Embodiment 4
During soft setting of 32s all-cotton satin weave printed fabric, 10 g/L buffering agent is added in a work liquid tank. A setting trolley speed is 40 to 50 m/min, and a setting temperature is 160 to 170°C.
Embodiment 5
The fabric treated in embodiment 4 is stood in air for 15 days.
Comparative example 1
The buffering agent in embodiment 4 is replaced with acetic acid, the remaining is unchanged, and a cloth cover pH is equal to 6 or so. The treated fabric is stood in air for 15 days.
Comparative example 2
The buffering agent in embodiment 4 is replaced with citric acid, the remaining is unchanged, a cloth cover pH is equal to 6 or so. The treated fabric is stood in air for 15 days.
Table 1 Main performance indexes of the fabric
Performance index pH Fastness to perspiration Laundry resistance Insolation Colored light of fabric after acid rolling Peculiar smell
Embodiment 1 6.43 / / / / No
2018102133 01 Aug 2018
Embodiment 2 6.48 / / / / No
Embodiment 3 6.25 3 to 4/3 to 4 3 to 4/3 to 4 >3 Without obvious changes No
Embodiment 4 6.36 3 to 4/3 to 4 3 to 4/3 to 4 >3 Without obvious changes No
Embodiment 5 6.40 3 to 4/3 to 4 3 to 4/3 to 4 >3 Without obvious changes No
Comparative example 1 8.56 3 to 4/3 3 to 4/3 2 to 3 Without obvious changes Acidic flavor
Comparative example 2 7.48 3 to 4/2 to 3 3 to 4/2 to 3 2 to 3 Certain yellowing, colored light bathochromic-shift No
It can be seen from the above table that the buffering agent of the present invention is suitable for various links needing acid adjusting in the dyeing and finishing processing, especially, in the aftertreatment soft acid adjusting process, no affects are caused on colored light of the fabric, and 5 no peculiar smells are generated. After the fabric is subjected to acid rolling, exposure in air is performed for a period of time, and a pH value of a cloth cover of the fabric can be kept very well.

Claims (5)

1. A buffering agent for balancing pH of fabric, comprising a mixed aqueous solution of
5 carboxylic polymers and salt of carboxylic acid, inorganic salt and a penetrating agent, and water being used as a solvent, wherein a weight ratio of the mixed aqueous solution of the carboxylic polymers and the salt of carboxylic acid to the inorganic salt to the penetrating agent is (35 to 45): (5 to 8): (8 to 10), and a solid content is 30 to 40%.
2. The buffering agent for balancing pH of fabric according to claim 1, wherein the mixed
10 aqueous solution of the carboxylic polymers and the salt of carboxylic acid is prepared through the following steps:
step 1, a cratonic acid solution with a concentration being 0.1 mol/L is prepared from deionized water, meanwhile, ammonium persulfate is added into the solution, concentration of ammonium persulfate is 0.001 mol/L, and a cratonic acid mixed solution is obtained;
15 step 2, temperature of 500 mL of deionized water rises to 50 to 60°C, 80 mL of the cratonic acid mixed solution in step 1 and 20 mL of a 0.05 mol/L acrylic acid aqueous solution are sequentially added dropwise, adding and stirring are performed at the same time, after adding dropwise is completed, temperature rises to 80 to 90°C, heat preserving stirring is performed for 0.5 to 1 h, 5 mL of a 0.005 mol/L polymerization inhibitor is added dropwise, heat preserving
20 stirring continues to be performed for 4 to 5 h, and a carboxylic polymer aqueous solution with a weight-average molecular weight being 800 to 1500 is obtained; and step 3, a 0.01 mol/L of sodium hydroxide or potassium hydroxide solution is added dropwise into the carboxylic polymer aqueous solution prepared in step 2, a molar ratio of carboxylic acid to carboxylate in a system is adjusted to be (50 to 65): (50 to 35), and the mixed aqueous solution of 25 the carboxylic polymers and the salt of carboxylic acid is prepared.
3. The buffering agent for balancing pH of fabric according to claim 2, wherein a dropping speed of the cratonic acid mixed solution in step 2 is 16 to 20 drops/min, and a dropping speed of the acrylic acid solution is 4 to 5 drops/min.
4. The buffering agent for balancing pH of fabric according to claim 1, wherein the inorganic
2018102133 01 Aug 2018 salt is sodium chloride or sodium sulfate.
5. The buffering agent for balancing pH of fabric according to claim 1, wherein the penetrating agent is isooctyl alcohol polyoxyethylene ether, and a quantity of oxyethylene groups is 3 to 5.
5 6. A preparation method of the buffering agent for balancing pH of fabric according to claim
1, wherein a mixture aqueous solution of carboxylic acid and salt thereof is added into deionized water to be stirred uniformly, then a penetrating agent is added, uniform stirring is performed, finally, inorganic salt is added, uniform stirring is performed, deionized water is added for supplementing till the solid content is 30% to 40%, and then the buffering agent can be prepared 10 after standing is performed for 24 h.
AU2018102133A 2018-02-28 2018-08-01 Buffering agent for balancing pH of fabric and preparation method of buffering agent Active AU2018102133A4 (en)

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* Cited by examiner, † Cited by third party
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US5298645A (en) * 1991-12-23 1994-03-29 Abbott Laboratories Polymeric buffering composition for fiber-optic physiological probe
KR100737934B1 (en) * 1999-12-10 2007-07-13 가오가부시끼가이샤 Methods of sterilization
CN101531731B (en) * 2009-03-27 2011-09-21 广东德美精细化工股份有限公司 Non-phosphate high molecular acidic performed polymer and preparation method thereof for textile dyeing
CN101736618B (en) * 2009-12-14 2011-05-25 苏州联胜化学有限公司 Acid scouring agent and preparation method thereof
WO2013130566A2 (en) * 2012-02-29 2013-09-06 Hollister Incorporated Buffered adhesive compositions for skin-adhering medical products
US9422463B2 (en) * 2012-02-29 2016-08-23 Hollister, Inc. Buffered adhesive compositions for skin-adhering medical products
CN103774463B (en) * 2013-12-30 2016-01-20 义乌市中力工贸有限公司 By temperature control, the agent of nanometer-sized microcapsules water system pH slidable adjustment
CN106380534B (en) * 2016-08-27 2019-01-08 传化智联股份有限公司 A kind of synthetic method and its application of acrylic acid series multiple copolymer
CN107447332A (en) * 2017-07-14 2017-12-08 浙江凯瑞博科技股份有限公司 A kind of preparation technology of soybean fiber selvedge band

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