WO2020056628A1

WO2020056628A1 - Aqueous nano porcelain imitating coating and preparation method therefor

Info

Publication number: WO2020056628A1
Application number: PCT/CN2018/106503
Authority: WO
Inventors: 王涛; 陈炼; 韩超伦
Original assignee: 周连惠
Priority date: 2018-09-18
Filing date: 2018-09-19
Publication date: 2020-03-26
Also published as: CN109370342A; CA3024231A1

Abstract

An aqueous nano porcelain imitating coating and a preparation method therefor. The preparation materials comprise the following ingredients in weight percentages: 0.1-20% of a resin, 5-30% of a nano-silica sol, 10-20% of an alcohol ether solvent, 10-30% of an adjuvant, and 40-70% of deionized water. The preparation method comprises: step 1, firstly preparing a nano-silica sol; step 2, then mixing and stirring raw materials according to a mixing ratio by using a high-speed disperser at a speed of 500 r/min at room temperature; and step 3, then adding the nano-silica sol at said percentage while stirring. The aqueous nano porcelain imitating coating has a strong adhesion, long service life and no problems of discoloration and fading, and has excellent antibacterial property and aging resistance, high temperature and flame resistance, self-cleaning property and resistance to dirt, and high hardness and wear resistance. In addition, the present coating is non-toxic, harmless, pollution-free, and non-radioactive, and has strong anti-pollution properties, and thus can be widely used in construction production and other industries.

Description

Water-based nano-imitation porcelain coating and preparation method thereof

Technical field

The invention relates to the technical field of coatings, in particular to a water-based nano-imitation porcelain coating and a preparation method thereof.

Background technique

Imitation porcelain coatings are widely used. They can be painted and sprayed on solid surfaces such as cement, metal, plastic, and wood. They can be used in interior walls of public buildings, interior walls of houses, kitchens, toilets, and bathrooms. They can also be used. Anticorrosion for exterior decoration of electrical appliances, machinery and furniture.

Imitation porcelain coatings include water-based imitation porcelain coatings and solvent-based imitation porcelain coatings. Solvent-based architectural coatings are restricted in coatings due to the release of toxic solvents during curing and do not meet environmental protection requirements. Washed imitation porcelain coatings are resistant to aging and adhesion. , Coatings are smooth, stain resistant, abrasion resistance, acid and alkali resistance, water resistance and other properties have always had many problems, limiting their widespread use.

Summary of the Invention

In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a water-based nano-imitation porcelain coating and a preparation method thereof. By adding a nano-silica filler and dispersing it in a nano-size dispersion in a paint mixing system, Silica nanoparticles show some special properties that some large particles do not have. They have excellent water resistance, alkali resistance, abrasion resistance, aging resistance, and strong adhesion.

In order to achieve the above-mentioned object, the present invention provides an aqueous nano-imitation porcelain coating, and its preparation raw materials are composed of the following components by weight percentage: 0.1-20% resin, 5-30% nano-silica sol, 10-20% Alcohol ether solvent, 10-30% adjuvant, 40-70% deionized water.

In the foregoing water-based nano-imitation porcelain coating, the resin is an acrylic polymer resin.

The above-mentioned water-based nano-imitation porcelain coating: the nano-silica sol is a self-made in-situ synthesized silica sol.

In the above-mentioned water-based nano-imitation porcelain coating, the alcohol ether solvents are ethylene glycol methyl ether, ethylene glycol butyl ether, diethylene glycol methyl ether, diethylene glycol ether, ethylene glycol phenyl ether, and ethylene glycol. One or more of butyl ether, propylene glycol butyl ether, propylene glycol methyl ether acetate, ethyl acetate, and butyl acetate

In the above-mentioned water-based nano-imitation porcelain coating, the auxiliary agent includes any one of a dispersant, a film-forming auxiliary agent, and an antifoaming agent.

The above-mentioned water-based nano-imitation porcelain coating, the dispersant model is any of BYK2090, BYK2091, BYK2096.

In the above-mentioned water-based nano-imitation porcelain coating, the defoaming agent is any one of glycerin, propylene glycol, terpineol, and isopropyl alcohol.

In the above-mentioned water-based nano-imitation porcelain coating, the film-forming aid is alcohol ester-12.

A method for preparing water-based nano-imitation porcelain coating includes the following steps:

Step 1. First, prepare a nano-silica sol: TEOS: ethanol: ethylene glycol ether: isopropyl alcohol: molar ratio of TEOS: ethyl orthosilicate, ethanol, ethylene glycol ether, isopropyl alcohol, deionized water, and hydrochloric acid: H2O: hydrochloric acid = 1: 1.25: 1.6: 0.98: 1.5: 7.3 * 10-4 ratio to prepare a mixed solution;

Step 2. Then, the resin, alcohol-ether solvent, auxiliary agent, and deionized water are stirred at a rate of 500 r / min by a high-speed disperser at normal temperature for 10 minutes;

Step 3. Then, add the matched nanometer silica sol and stir for 1-3h.

In the above method for preparing an aqueous nano-imitation porcelain coating, after the step 1 is prepared into a mixed solution, the 0.11M ammonia water with the total weight of the mixed solution of 0.08% is stirred at 60 ° C for 1 hour and then stored at room temperature; or stirred at 60 ° C for 1 hour. Store at room temperature afterwards; or stir at 60 ° C for 1h, then add 0.1% 0.11M ammonia water by weight of the mixed solution, and continue to stir at 60 ° C for 1h and store at room temperature.

The beneficial effects of the present invention are:

The water-based nano-imitation porcelain coating prepared by the invention has strong adhesion ability, long service life, and does not cause problems such as discoloration and fading, and has excellent antibacterial and aging resistance, high temperature and flame resistance, dirt resistance and self-cleaning, and high hardness. It is wear-resistant, and the coating is non-toxic, harmless, non-polluting, non-radioactive, and highly resistant to pollution. It can be widely used in construction production and other industries.

detailed description

The invention provides an aqueous nano-imitation porcelain coating, comprising a resin, a hydrophilic nano-silica, an alcohol-ether solvent, an auxiliary agent, and deionized water. In the aqueous nano-imitation porcelain coating of the present invention, the content of each component is preferably: 0.1-20% resin; 5-30% nano-silica sol, 10-20% alcohol ether solvent, 10-30% auxiliary Agent, and 40-70% deionized water.

Among them, the resin is an acrylic polymer resin; nano-silica is a self-made in-situ synthesized silica sol, and the preparation method thereof is described below; the alcohol ether solvents are glycol methyl ether, glycol butyl ether, and diethyl ether. Glycol methyl ether, diethylene glycol ether, ethylene glycol phenyl ether, ethylene glycol butyl ether, propylene glycol butyl ether, propylene glycol methyl ether acetate, ethyl acetate, butyl acetate; auxiliaries include Dispersants, film-forming aids, defoamers, etc., where the dispersant is BYK2090, BYK2091, or BYK2096. These dispersants have a better dispersion effect on pigments and nanoparticles; the defoamers are glycerol, propylene glycol, Terpineol, isopropanol, etc .; film-forming aids are alcohol ester-12 (2,2,4-trimethyl-1,3pentanediol monoisobutyric acid value) and the like.

Embodiment 1 of the present invention:

First prepare a nano-sized silica sol: TEOS: ethanol: ethylene glycol ether: isopropyl alcohol: H2O = 1: Ethyl orthosilicate, ethanol, ethylene glycol ether, isopropyl alcohol, deionized water, in a molar ratio: A mixed solution was prepared at a ratio of 1.25: 1.6: 0.98: 1.5, and 0.11M ammonia water, which accounted for 0.08% of the total weight of the system, was stirred at 60 ° C for 1 hour and stored at room temperature.

Then, at normal temperature, a high-speed disperser was used at a rate of 500 r / min to 150 g of acrylic resin, 45 g of propylene glycol methyl ether acetate, 200 g of water and 20 g of a dispersant (BYK 2090), and 30 g of an antifoaming agent (glycerol ) Stir for 10 min.

Then, 120 g of the prepared nano silica sol was added, and the mixture was stirred at a rate of 2000 r / min for 1 h to obtain a finished product.

Embodiment 2 of the present invention:

First, prepare a nano-silica sol: TEOS: ethanol: ethylene glycol ether: isopropyl alcohol: H _{2 with} ethyl orthosilicate, ethanol, ethylene glycol ether, isopropyl alcohol, deionized water, and hydrochloric acid in a molar ratio. O: hydrochloric acid = 1: 1.25: 1.6: 0.98: 1.5: 7.3 * 10 ^-4 ratio was prepared into a mixed solution, stirred at 60 ° C for 1 h, and then stored at room temperature.

Then, at room temperature, a high-speed disperser was used at a rate of 500 r / min to 180 g of acrylic resin, 60 g of ethylene glycol phenyl ether, 280 g of deionized water and 10 g of a dispersant (BYK 2096) and 10 g of a film-forming aid ( The alcohol ester-12) was stirred for 10 min.

Then, 150 g of the above-mentioned nano-silica sol was added and stirred at a rate of 2000 r / min for 1 h; finally, 20 g of an antifoaming agent (terpineol) was added and stirred at 2500 r / min for 2 hours to obtain a finished product.

Embodiment 3 of the present invention:

First, prepare a nano-silica sol: using two steps of acid-base catalysis, ethyl orthosilicate, ethanol, ethylene glycol ether, isopropyl alcohol, deionized water, and hydrochloric acid are used in a molar ratio TEOS: ethanol: ethylene glycol Diethyl ether: isopropanol: H ₂ O hydrochloric acid = 1: 1.25: 1.6: 0.98: 1.5: 7.3 * 10 ^-4 ratio to prepare a mixed solution, stir at 60 ° C for 1h, and then add 0.1% 0.11M ammonia water to the solution. , Continue to stir at 60 ° C for 1 h and store at room temperature.

Then, 200 g of acrylic resin, 300 g of deionized water, and 20 g of dispersant (BYK 2091) and 20 g of defoamer (propylene glycol) were stirred at 500 r / min by a high-speed disperser at normal temperature for 10 minutes. .

Then, 280 g of the nano-silica sol was added, and the mixture was stirred at a rate of 2000 r / min for 1 h; finally, it was stirred at 2500 r / min for 2 hours to obtain a finished product.

The prepared water-based nano-imitation porcelain coating has strong adhesion ability, long service life, and does not cause problems such as discoloration and fading, and has excellent antibacterial and aging resistance, high temperature flame resistance, stain resistance, self-cleaning, and high durability. Hardness and wear resistance, and the coating is non-toxic, harmless, non-polluting, non-radioactive, and has strong anti-pollution properties. It can be widely used in construction production and other industries.

The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the technical field based on the concept of the present invention through logic analysis, reasoning, or limited experiments based on the prior art should fall within the protection scope determined by the claims.

Claims

A water-based nano-imitation porcelain coating, which is characterized in that its preparation raw materials are composed of the following components by weight percentage: 0.1-20% resin, 5-30% nano-silica sol, 10-20% alcohol ether solvent, 10 -30% auxiliary, 40-70% deionized water.
The water-based nano-imitation porcelain coating according to claim 1, wherein the resin is an acrylic polymer resin.
The water-based nano-imitation porcelain coating according to claim 1, wherein the nano-silica sol is a self-made in-situ synthesized silica sol.
The water-based nano-imitation porcelain coating according to claim 1, wherein the alcohol ether solvent is ethylene glycol methyl ether, ethylene glycol butyl ether, diethylene glycol methyl ether, diethylene glycol ether, Ethylene glycol phenyl ether, ethylene glycol butyl ether, propylene glycol butyl ether, propylene glycol methyl ether acetate, ethyl acetate, butyl acetate
The water-based nano-imitation porcelain coating according to claim 1, wherein the auxiliary agent comprises any one of a dispersant, a film-forming aid, and an antifoaming agent.
The water-based nano-imitation porcelain coating according to claim 5, wherein the type of the dispersant is any one of BYK2090, BYK2091, and BYK2096.
The water-based nano-imitation porcelain coating according to claim 5, wherein the defoaming agent is any one of glycerin, propylene glycol, terpineol, and isopropyl alcohol.
The water-based nano-imitation porcelain coating according to claim 5, wherein the film-forming assistant is alcohol ester-12.
The method for preparing an aqueous nano-imitation porcelain coating according to claim 1, further comprising the following steps:

Step 1. First, prepare a nano-silica sol: TEOS: ethanol: ethylene glycol ether: isopropyl alcohol: molar ratio of TEOS: ethyl orthosilicate, ethanol, ethylene glycol ether, isopropyl alcohol, deionized water, and hydrochloric acid: H2O: hydrochloric acid = 1: 1.25: 1.6: 0.98: 1.5: 7.3 * 10-4 ratio to prepare a mixed solution;

Step 2. Then, the resin, alcohol-ether solvent, auxiliary agent, and deionized water are stirred at a rate of 500 r / min by a high-speed disperser at normal temperature for 10 minutes;

Step 3. Then, add the matched nanometer silica sol and stir for 1-3h.
The method for preparing an aqueous nano-imitation porcelain coating according to claim 1 according to claim 9, characterized in that: after the step 1 is formulated into a mixed solution: 0.11M of 0.08% of the total weight of the mixed solution is counted Ammonia is stirred at 60 ° C for 1h and stored at room temperature; or stirred at 60 ° C for 1h and stored at room temperature; or stirred at 60 ° C for 1h, and then adding 0.1% 0.11M ammonia solution by weight of the mixed solution, and then stirred at 60 ° C for 1h After storage at room temperature.