A kind of preparation method of high solid content waterborne polyurethane adhesive

A water-based polyurethane and high-solid content technology, which is applied in the preparation of adhesives and the preparation of high-solid-content water-based polyurethane adhesives, can solve problems such as poor initial tack and peel strength, poor stability, low solid content and other problems. , to achieve the effect of promoting technology research and development, broadening the market, and high solid content

Active Publication Date: 2018-04-17
QUANZHOU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But generally speaking, compared with foreign products, the existing domestic WPU products have the main problems of low solid content, generally not higher than 35%, poor mechanical properties such as initial adhesion and peel strength, and stability. to improve

Method used

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  • A kind of preparation method of high solid content waterborne polyurethane adhesive
  • A kind of preparation method of high solid content waterborne polyurethane adhesive
  • A kind of preparation method of high solid content waterborne polyurethane adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) By weight percentage, weigh 26% polyol polyol polyadipate 1,4-butylene adipate diol that has been vacuum dehydrated, 3% hydrophilic chain extender 2,2-dimethylol propionic acid , 4% N-methylpyrrolidone, 12% isophorone diisocyanate, 0.1% catalyst dibutyltin dilaurate, 0.15% crosslinking agent mannitol, 3% neutralizing agent triethylamine, and the balance is deionized water;

[0028] (2) Prepolymerization and chain extension: After dissolving 2,2-dimethylol propionic acid in N-methylpyrrolidone, add it to the flask containing poly-1,4-butylene adipate diol, Place in a water bath at 60°C and stir at a constant temperature for 30 minutes, pass nitrogen gas into the flask, and after the temperature of the water bath rises to 75°C, add isophorone diisocyanate, add the catalyst dibutyltin dilaurate and the crosslinking agent mannitol dropwise, Constant temperature reaction 60min;

[0029] (3) Neutralization: After cooling down to 50°C, add neutralizer triethylamine to ad...

Embodiment 2

[0032] (1) By weight percentage, weigh 22% of the mixed polyol that has been vacuum dehydrated, that is, the mixture of polyadipate 1,4-butylene glycol ester diol and polycarbonate diol (the ratio of the two is 4:1 ), 3% hydrophilic chain extender 2,2-dimethylolpropionic acid, 4% N-methylpyrrolidone, 12% isophorone diisocyanate, 0.05% catalyst dibutyltin dilaurate, 0.2% cross-linked Joint agent mannitol, 2.7% neutralizing agent triethylamine, the balance is deionized water;

[0033] (2) Prepolymerization and chain extension: After dissolving 2,2-dimethylolpropionic acid in N-methylpyrrolidone, add it to a flask containing mixed polyols, place it in a water bath at 60°C and stir for 30 minutes , feed nitrogen into the flask, heat up the water bath to 75°C, add isophorone diisocyanate, dropwise add the catalyst dibutyltin dilaurate and the crosslinking agent mannitol, and react at constant temperature for 60 minutes;

[0034] (3) Neutralization: After cooling down to 50°C, add ...

Embodiment 3

[0037] (1) By weight percentage, weigh 25.5% polyol polyol polyadipate 1,4-butylene adipate diol that has been vacuum dehydrated, 2.2% hydrophilic chain extender 2,2-dimethylol propionic acid , 3.8% N-methylpyrrolidone, 9.0% isophorone diisocyanate, 0.05% catalyst dibutyltin dilaurate, 0.13% crosslinking agent mannitol, 1.6% neutralizing agent triethylamine, and the balance is deionized water.

[0038] (2) Prepolymerization and chain extension: After dissolving 2,2-dimethylol propionic acid in N-methylpyrrolidone, add it to the flask containing poly-1,4-butylene adipate diol, Place in a water bath at 60°C and stir at a constant temperature for 30 minutes, pass nitrogen gas into the flask, and after the temperature of the water bath rises to 75°C, add isophorone diisocyanate, add the catalyst dibutyltin dilaurate and the crosslinking agent mannitol dropwise, Constant temperature reaction 60min;

[0039](3) Neutralization: After cooling down to 50°C, add neutralizer triethylam...

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Abstract

The invention discloses a preparation method for a high-solid-content aqueous polyurethane adhesive, and belongs to the technical field of production of adhesives for shoes. In employed composition in the preparation method, isophorone diisocyanate and poly-1,4-butylene adipate glycol are taken as main raw materials, dibutyl tin dilaurate is taken as a catalyst, 2,2-bis(hydroxymethyl)propionic acid is taken as a hydrophilic chain extender, mannitol is taken as a cross-linking agent, and triethylamine is taken as a neutralizer, so that a polyurethane prepolymer is synthesized. Certain amount of deionized water is added during high-speed shearing stirring, and the aqueous polyurethane adhesive for shoes is synthesized in a solvent-free system. The preparation method is green, environment-friendly, solvent-free, convenient, safe and low in production cost, and provides a new approach for exploiting the aqueous polyurethane adhesive for shoes. The prepared product possesses superior antistripping performance, and the technological indexes are better than those of national standards.

Description

technical field [0001] The invention relates to a method for preparing an adhesive, in particular to a method for preparing a water-based polyurethane adhesive with a high solid content, and belongs to the technical field of adhesive production for shoes. Background technique [0002] my country is the world's largest shoe producer and exporter, and Quanzhou, known as the "shoe capital", accounts for a large share of the country's footwear products. There are more than 4,000 shoe-making enterprises of various sizes in Quanzhou (including Anta, Peak, Jordan, Guirenniao, 361 Degrees, Delhui and other famous brands), with an annual output of more than 1 billion pairs of shoes, which are exported and sold all over the world. [0003] Since the 1990s, European and American countries have formulated strict organic emission standards, prompting the emergence of the fourth generation of environmentally friendly shoe adhesives, mainly solvent-free and water-based polyurethane adhesiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/06C08G18/66C08G18/44C08G18/42C08G18/32C08G18/12C08G18/08
Inventor 李文杰曾宏
Owner QUANZHOU NORMAL UNIV
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