High-solid-content aqueous adhesive for shoes and preparation method thereof

A water-based adhesive with high solid content technology, applied in adhesives, carboxyl rubber adhesives, monocarboxylate copolymer adhesives, etc., to achieve excellent low temperature resistance, high bonding strength, and broaden the market.

Inactive Publication Date: 2012-12-19
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the domestic development of high-solid water-based polyurethane started relatively late. Compared with foreign products, there is still a certain gap on the whole. Few factories can produce water-based polyurethane with good stability, excellent performance and high solid content. Adhesive

Method used

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  • High-solid-content aqueous adhesive for shoes and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Take 4% isocyanate, 10% polyol, 3% hydrophilic chain extender, 1.0% crosslinking agent, 0.8% neutralizing agent, 0.1% catalyst, 50% water-based resin by weight percentage Emulsion, 3% solvent, the balance is deionized water;

[0025] 2) Prepolymerization: Add polyols and isocyanates into the reaction kettle, raise the temperature to 70°C, then add the catalyst, and react for 3 hours;

[0026] 3) Chain extension: add a hydrophilic chain extender and a cross-linking agent at 70°C for 2 hours;

[0027] 4) Neutralization: Add neutralizer after cooling down to 30°C;

[0028] 5) Emulsification: Add deionized water and water-based resin emulsion to it under high-speed stirring to emulsify and stir evenly to obtain a water-based adhesive for shoes with high solid content.

[0029] Wherein, the isocyanate is isophorone diisocyanate;

[0030] The polyol is polycaprolactone diol with a number-average relative molecular mass of 1000-3000;

[0031] The hydrophilic chain exten...

Embodiment 2

[0038] 1) Including 8% isocyanate, 15% polyol, 5% hydrophilic chain extender, 0.8% crosslinking agent, 0.9% neutralizing agent, 0.2% catalyst, 60% water-based resin by weight percentage Emulsion, 1% solvent, the balance is deionized water;

[0039] 2) Prepolymerization: Add polyols and isocyanates into the reaction kettle, raise the temperature to 90°C, then add the catalyst, and react for 1 hour;

[0040] 3) Chain extension: add a hydrophilic chain extender and a cross-linking agent at 90°C for 1 hour;

[0041] 4) Neutralization: Add neutralizer after cooling down to 40°C;

[0042] 5) Emulsification: Add deionized water and water-based resin emulsion to it under high-speed stirring to emulsify and stir evenly to obtain a water-based adhesive for shoes with high solid content.

[0043] Among them, the isocyanate is hexamethylene diisocyanate.

[0044] The polyol is a polycarbonate diol with a number-average molecular mass of 1000-3000;

[0045] The hydrophilic chain extend...

Embodiment 3

[0052] 1) By weight percentage, it includes 7% isocyanate, 20% polyol, 1% hydrophilic chain extender, 1.2% crosslinking agent, 1.1% neutralizer, 0.3% catalyst, 45% water-based resin Emulsion, 5% solvent, the balance is deionized water;

[0053] 2) Prepolymerization: Add polyols and isocyanates into the reactor, raise the temperature to 75°C, then add catalyst, and react for 2 hours;

[0054] 3) Chain extension: add a hydrophilic chain extender and a cross-linking agent at 75°C for 1.5 hours;

[0055] 4) Neutralization: Add neutralizer after cooling down to 33°C;

[0056] 5) Emulsification: Add deionized water and water-based resin emulsion to it under high-speed stirring to emulsify and stir evenly to obtain a water-based adhesive for shoes with high solid content.

[0057] Wherein, the isocyanate is a mixture of isophorone diisocyanate and hexamethylene diisocyanate;

[0058] The polyol is a polyethylene adipate diol with a number-average molecular weight of 1000-3000;

...

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Abstract

The invention discloses a high-solid-content aqueous adhesive for shoes and a preparation method thereof. The aqueous adhesive is prepared from an aqueous resin and a deionized water-emulsified polyurethane prepolymer, wherein the polyurethane prepolymer is synthesized from isocyanate, polylol, a hydrophilic chain extender, a crosslinking agent and a neutralizing agent. The preparation method comprises the following steps of: preparing a polyurethane prepolymer through pre-polymerizing and neutralizing processes; and preparing the aqueous adhesive for a high-solid-content shoe by using an aqueous resin in cooperation with deionized water emulsification. The aqueous adhesive for shoes disclosed by the invention has the advantages of high solid content, low cost, excellent performance and the like.

Description

technical field [0001] The invention belongs to the field of adhesives for shoes, and in particular relates to a water-based adhesive for shoes with high solid content and a preparation method thereof. technical background: [0002] my country is the largest shoe-making industry in the world. Nearly 7 billion pairs of shoes are produced every year. Most manufacturers use adhesives to produce shoes. Adhesives can be divided into two categories: solvent-based and water-based shoe adhesives. The annual consumption of shoe adhesives can reach more than 200,000 tons, but most of them are solvent-based shoe adhesives. With the increasing awareness of human environmental protection and the improvement of relevant laws, environmentally friendly water-based shoe adhesives will gradually replace Solvent based shoe glue. Water-based polyurethane shoe glue has become a research hotspot because of its advantages of economy, safety (non-flammable and non-explosive), non-toxic, non-pollut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C09J175/08C09J123/08C09J131/04C09J113/02C08G18/66C08G18/10
Inventor 王磊沈一丁赖小娟岳杰
Owner SHAANXI UNIV OF SCI & TECH
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