Degradation collagen-polyurethane waterborne wood adhesive and preparation method thereof

A technology of wood adhesive and polyurethane, which is applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve the problems of high cost and achieve the effect of low cost

Active Publication Date: 2017-05-31
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, through the copolymerization modification with water-based polyurethane, it not only solves the high cost problem of single polyurethane, but also effectively improves the adhesive strength and water resistance of chrome leather shavings collagen degradation products.

Method used

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  • Degradation collagen-polyurethane waterborne wood adhesive and preparation method thereof
  • Degradation collagen-polyurethane waterborne wood adhesive and preparation method thereof
  • Degradation collagen-polyurethane waterborne wood adhesive and preparation method thereof

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preparation example Construction

[0037] The invention provides a kind of preparation method of degraded collagen-polyurethane water-based wood adhesive, comprising the following steps:

[0038] 1) Weighing: Weigh the following components by weight: 100-150 parts of isocyanate, 50-75 parts of polyester polyol, 30-45 parts of hydrophilic chain extender, 10-45 parts of small molecule diol chain extender 15 parts, 20-30 parts of neutralizing agent, 50-110 parts of degraded collagen solution; the isocyanate is one of toluene diisocyanate or isophorone diisocyanate; the polyester polyol is polybutylene adipate One of alcohol ester diol or polyethylene adipate. The hydrophilic chain extender is one of dimethylol propionic acid or dimethylol butyric acid, and the small molecule diol chain extender is one of 1,4-butanediol or diethylene glycol The neutralizer is one of triethylamine or tri-n-butylamine; the degraded collagen comes from the alkaline degradation of waste leather shavings to a molecular mass of 6000-100...

Embodiment 1

[0047] A preparation method for degrading collagen-polyurethane water-based wood adhesive, comprising the following steps:

[0048] (1) Weigh 50 parts of polybutylene adipate diol with a molecular weight of 2000, vacuum dehydrate at 110°C for 1 hour, cool down to 65°C, add 100 parts of toluene diisocyanate to react for 1 hour, raise the temperature to 80°C, and keep it warm for 1 hour to obtain the Polymer;

[0049] (2) Add 30 parts of dimethylolpropionic acid to the prepolymer in (1) for chain extension, react at 60°C for 1 hour, add 10 parts of 1,4-butanediol to the system for chain extension, 60°C React for 1h, heat up to 80°C, and react for 2h;

[0050] (3) Cool down to 50°C, add 20 parts of triethylamine neutralizer for neutralization, add deionized water at 1000r / min and stir for 10min to obtain aqueous polyurethane prepolymer emulsion;

[0051] (4) At 300r / min, add 50 parts of collagen degradation product aqueous solution to the prepolymer emulsion, stir for 10 minute...

Embodiment 2

[0053] A preparation method for degrading collagen-polyurethane water-based wood adhesive, comprising the following steps:

[0054] (1) Weigh 50 parts of polybutylene adipate diol with a molecular weight of 2000, vacuum dehydrate at 110°C for 1 hour, cool down to 65°C, add 100 parts of isophorone diisocyanate, dropwise add 0.1 part of dilauric acid diol Butyl tin catalyst, react at 65°C for 1h, raise the temperature to 85°C, and keep it warm for 1h to obtain a prepolymer;

[0055] (2) Add 30 parts of dimethylolbutyric acid for chain extension, react at 60°C for 1 hour, add 10 parts of 1,4-butanediol to the system for chain extension, keep warm at 60°C for 1 hour, heat up to 80°C, and react for 3 hours ;

[0056] (3) Cool down to 50°C, add 20 parts of tri-n-butylamine neutralizer for neutralization, add deionized water at 1100r / min and stir for 5min to obtain aqueous polyurethane prepolymer emulsion;

[0057] (4) At 400r / min, add 85 parts of collagen degradation product aqueo...

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Abstract

The invention discloses a degrading collagen-polyurethane waterborne wood adhesive, which is prepared from the following ingredients in parts by weight: 100 to 150 parts of isocyanate, 50 to 75 parts of polyester type polyalcohol, 0.1 to 0.2 part of catalysts, 30 to 45 parts of hydrophilic extended chain agents, 10 to 15 parts of micromolecule diglycol chain extenders, 20 to 30 parts of neutralizing agents and 50 to 110 parts of degradation collagen. The invention also discloses a preparation method of the degradation collagen-polyurethane water-based wood adhesive. A chrome shaving waste degradation product generated in a leather production process is used as a raw material; a path is increased for the resource reutilization of the chrome shaving waste; the corresponding economic benefits are brought; meanwhile, the environment pressure is relieved to a certain degree. Meanwhile, through the copolymerization modification with waterborne polyurethane, the problem of high cost of the single polyurethane is solved; meanwhile, the adhesive intensity, the water-resistant performance and the like of the chrome shaving collagen degradation substances are effectively improved.

Description

technical field [0001] The invention belongs to the field of chemistry and chemical engineering, and in particular relates to a degradable collagen-polyurethane water-based wood adhesive and a preparation method thereof. Background technique [0002] The degradation product of skin collagen (such as gelatin) has a long history as an adhesive in the wood industry. High bonding strength, easy glue adjustment, no need to add other additives. However, the molecular weight is required to reach about 100kDa, otherwise, as the molecular weight of the collagen degradation product decreases, the curing ability and adhesion ability of the glue will also drop sharply, so that the small molecule collagen degradation product made from chrome leather scraps cannot be directly used as an adhesive. , thus greatly limiting the recycling of chrome leather waste in wood adhesives. At the same time, collagen degradation products have poor moisture and water resistance, swell when exposed to w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C09J189/06C08G18/42C08G18/10C08G18/66
CPCC08G18/10C08G18/4238C08G18/664C08G18/6659C09J175/06C09J189/06C08L89/06C08L75/06C08G18/348C08G18/3206
Inventor 单志华杨茂王玉增陈慧
Owner SICHUAN UNIV
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