GB841749A - Lignin-modified phenolic resins - Google Patents
Lignin-modified phenolic resinsInfo
- Publication number
- GB841749A GB841749A GB12069/58A GB1206958A GB841749A GB 841749 A GB841749 A GB 841749A GB 12069/58 A GB12069/58 A GB 12069/58A GB 1206958 A GB1206958 A GB 1206958A GB 841749 A GB841749 A GB 841749A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lignin
- resol
- phenol
- novolac
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G8/00—Condensation polymers of aldehydes or ketones with phenols only
- C08G8/28—Chemically modified polycondensates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G8/00—Condensation polymers of aldehydes or ketones with phenols only
- C08G8/38—Block or graft polymers prepared by polycondensation of aldehydes or ketones onto macromolecular compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Abstract
Alcohol-soluble lignin-modified phenolic resins are formed by the condensation of "low-temperature lignin" in the presence of an acid catalyst at a temperature of at least 130 DEG C. with a phenolformaldehyde condensate. "Low temperature lignin" is obtained by removal by hydrolysis of cellulose and hemicellulose from cellulosic material using aqueous hydrochloric acid of up to 42% concentration by weight at a temperature preferably not exceeding 30 DEG C. A resol type resin is prepared, which is diluted with phenol (to avoid spontaneous hardening) before the lignin is added. Water formed during the reaction is distilled off, the mixture neutralised and filtered, and the excess phenol removed under reduced pressure. Besides phenol the xylenols may be used to produce the resol, and the formaldehyde may be in the form of formalin, paraformaldehyde or trioxy-methylene. Modifications of the process described are:-(1) The lignin and acid catalyst can first be added to part of the phenol diluent, the mixture allowed to stand until the exothermic reaction ceases, and then condensed with the resol, (2) A novolac can replace the resol, the lignin-modified novolac subsequently being hardened with hexamethylene tetramine, (3) A crude cellulose hydrolysate containing lignin and sugars can be used, (4) A thermoplastic or an uncured thermosetting synthetic resin e.g. terpene modified phenolic may be included in the reaction mixture producing the novolac or the resol. Eleven examples describe the invention and its modifications and four comparative examples are included. Specified uses for the product are (1) moulding powders, (2) foundry sands, (3) ionexchange resins, (4) laminates. Specifications 827,921 and 827,922 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH841749X | 1957-04-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB841749A true GB841749A (en) | 1960-07-20 |
Family
ID=4541319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12069/58A Expired GB841749A (en) | 1957-04-16 | 1958-04-16 | Lignin-modified phenolic resins |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB841749A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10793646B2 (en) | 2014-09-26 | 2020-10-06 | Renmatix, Inc. | Adhesive compositions comprising type-II cellulose |
| CN113816373A (en) * | 2021-09-16 | 2021-12-21 | 常州大学 | Preparation method of biomass modified phenolic resin carbon spheres with controllable particle size |
| CN114957576A (en) * | 2022-05-27 | 2022-08-30 | 五邑大学 | Preparation method and application of lignin-based phenolic resin |
-
1958
- 1958-04-16 GB GB12069/58A patent/GB841749A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10793646B2 (en) | 2014-09-26 | 2020-10-06 | Renmatix, Inc. | Adhesive compositions comprising type-II cellulose |
| CN113816373A (en) * | 2021-09-16 | 2021-12-21 | 常州大学 | Preparation method of biomass modified phenolic resin carbon spheres with controllable particle size |
| CN113816373B (en) * | 2021-09-16 | 2023-10-27 | 常州大学 | Preparation method of particle size-controllable biomass modified phenolic resin carbon spheres |
| CN114957576A (en) * | 2022-05-27 | 2022-08-30 | 五邑大学 | Preparation method and application of lignin-based phenolic resin |
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