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High-initial-adhesion waterborne polyurethane adhesive and preparation method thereof

A water-based polyurethane, high initial viscosity technology, applied in the field of adhesives, can solve the problems of complicated preparation process, low production efficiency, difficult marketization, etc., and achieves the advantages of compact preparation process, high success rate, shortened drying time and energy consumption. Effect

Inactive Publication Date: 2014-12-31
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese invention patent CN102827571A self-made polyester polyol, and introduced cross-linking monomer trimethylolpropane and sulfonic acid type hydrophilic chain extender to prepare a water-based polyurethane product with a solid content of close to 50%, but its viscosity is too high, Poor liquidity, difficult to construct, difficult to market
Chinese invention patent CN102863939A uses epoxy resin and acrylic resin to double modify polyurethane emulsion, and the water-based polyurethane product prepared has good performance, but its preparation process is complicated and the production efficiency is low

Method used

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  • High-initial-adhesion waterborne polyurethane adhesive and preparation method thereof
  • High-initial-adhesion waterborne polyurethane adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In parts by weight, add 78 parts of poly-1,4-butanediol adipate (number average molecular weight 2000), 1.3 parts of 1,4-butanediol to the reactor equipped with a stirrer and condensation reflux device , at 110°C, vacuumize to remove water for 1 hour, lower the temperature to 70°C, and control the speed to 140rpm, add 0.02 parts of dibutylsilyl lauric acid, 10.55 parts of isophorone diisocyanate, 2.66 parts of hexaethylene oxide into the reactor Methyl diisocyanate, heat up to 80°C, start the reaction, after 0.5 hours of reaction, add 25 parts of butanone, continue the reaction for 2.2 hours, add 1.86 parts of isophorone diisocyanate, 0.47 parts of hexamethylene diisocyanate, and react for 0.4 h. Cool down to 55°C, add 85 parts of acetone, adjust the rotation speed to 500 rpm, add 2.5 parts of a 50% aqueous solution of sodium ethylenediaminoethanesulfonate, and react for 0.5 hours. Discharge, under the high-speed shear mixer, add 98 parts of deionized water, set the ro...

Embodiment 2

[0024] In parts by weight, add 80 parts of poly-1,4-butanediol adipate (number average molecular weight 2200), 1.1 parts of 1,4-butanediol to the reactor equipped with a stirrer and condensation reflux device , at 120°C, vacuumize to remove water for 1 hour, lower the temperature to 74°C, and control the speed to 145rpm, add 0.04 parts of dibutylsilyl lauric acid, 11.18 parts of isophorone diisocyanate, 2.66 parts of hexaethylene oxide into the reactor Methyl diisocyanate, heat up to 85°C, start the reaction, after 0.5 hours of reaction, add 30 parts of butanone, continue the reaction for 2.5 hours, add 1.24 parts of isophorone diisocyanate, 0.47 parts of hexamethylene diisocyanate, and react for 0.6 h. Cool down to 59°C, add 95 parts of acetone, adjust the rotation speed to 520rpm, add 2.6 parts of an aqueous solution with a mass fraction of sodium ethylenediaminoethanesulfonate of 49%, and react for 0.5h. For discharging, under the high-speed shear mixer, add 99 parts of de...

Embodiment 3

[0026]In parts by weight, add 82 parts of poly-1,4-butanediol adipate (number average molecular weight 1800), 1.0 parts of 1,4-butanediol to the reactor equipped with a stirrer and condensation reflux device , at 110°C, vacuumize to remove water for 1.2h, cool down to 70°C, and control the speed to 150rpm, add 0.02 parts of stannous octoate, 10.55 parts of isophorone diisocyanate, 2.82 parts of hexamethylene Base diisocyanate, heat up to 85°C, start to react, after 0.8h of reaction, add 30 parts of butanone, continue to react for 2.5h, add 1.86 parts of isophorone diisocyanate, 0.31 parts of hexamethylene diisocyanate, react for 0.6h . Cool down to 57°C, add 100 parts of acetone, adjust the rotation speed to 515 rpm, add 2.7 parts of a 50% aqueous solution of sodium ethylenediaminoethanesulfonate, and react for 0.6 hours. For discharging, under the high-speed shear mixer, add 100 parts of deionized water, set the rotation speed at 5500 rpm, emulsify for 15 minutes, add 0.3 pa...

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Abstract

The invention discloses high-initial-adhesion waterborne polyurethane adhesive and a preparation method thereof. The preparation method includes: adding 78-82 parts of polyester polyol and 0.8-1.3 parts of 1, 4-butanediol into a reactor, evacuating, cooling, adding 0.002-0.06 part of catalyst, 10-12 parts of isophorone diisocyanate and 2.5-2.9 parts of hexamethylene diisocyanate, heating up, adding butanone after 0.5-0.8h of reaction, allowing for continuous reaction, adding 1.2-2 parts of isophorone diisocyanate and 0.3-0.5 part of hexamethylene diisocyanate to allow for reaction for 0.4-0.6h, cooling, adding solvent acetone, adding hydrophilic chain extender, and allowing for reaction to discharge a product, high-initial-adhesion waterborne polyurethane adhesive which is larger than or equal to 1.9N / mm in initial adhesion. The high-initial-adhesion waterborne polyurethane adhesive has the advantages that initial adhesion and solid content of the waterborne polyurethane adhesive are increased, comprehensive performances are excellent, and the adhesive is suitable for adhering shoe materials, leathers and PVC boards.

Description

technical field [0001] The invention relates to an adhesive, in particular to a high initial tack water-based polyurethane adhesive and a preparation method thereof. The adhesive can be used in the fields of shoe materials, leather, PVC plates and the like. Background technique [0002] Water-based polyurethane adhesive uses water as the dispersion medium, and its continuous phase is water. Compared with traditional solvent-based polyurethane adhesives, it has the advantages of environmental protection, safety, easy storage and storage, and convenient use. At the same time, it better retains the characteristics of solvent-based polyurethane, especially cross-linked polyurethane emulsion. Therefore, in recent years, the research and development and production of water-based polyurethane have attracted more and more attention from all over the world. For example, in the US adhesive market in 2003, solvent-based adhesives accounted for 14%, while water-based adhesives accounted...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/12C09J175/06C08G18/75C08G18/73C08G18/66C08G18/42C08G18/32
Inventor 涂伟萍陈军王锋胡剑青
Owner SOUTH CHINA UNIV OF TECH
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