Waterborne polyurethane adhesive for synthetic leather and preparation method thereof

A water-based polyurethane and adhesive technology, used in polyurea/polyurethane adhesives, adhesive types, adhesives, etc., can solve the problems of high health hazards, environmental pollution, and wide use of production personnel and application personnel. , to achieve the effect of easy control of flatness, reduction of treatment costs, and low irritation

Active Publication Date: 2013-12-18
SHANDONG TIANQING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of environment-friendly, safe water-based polyurethane adhesive for synthetic leather and its preparation method, to solve the problem that high-VOC o

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0049] Example 1

[0050] 1) Under argon atmosphere, 9.0kg of dicyclohexylmethane diisocyanate, 12kg of polytetrahydrofuran ether glycol and 0.005kg of phosphoric acid are reacted at 70°C for 1.5 hours in a reactor equipped with reflux condenser, thermometer and stirring, using HG / T2409-1992 standard detects isocyanate group content reduced to 2.0%;

[0051] 2) Cool down to 40℃, add 0.005kg stannous octoate, 0.8kg dimethylolpropionic acid, 0.03kg trimethylolpropane, 1.1kg trimethylolpropane polyoxypropylene polyoxyethylene ether, After 0.09kg of 1,6-hexanediol and 5kg of methyl acetate, the temperature is increased to 85°C, and the temperature is kept at 85°C to continue the reaction for 3 hours;

[0052] 3) Cool down to 50℃, add 0.03kg tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid] pentaerythritol ester, 0.02 kg methyl tin mercaptan, stir for 10 minutes, then Add 0.6kg of dimethylaminoethanol to the reaction kettle to neutralize the reaction solution, and continue t...

Example Embodiment

[0055] Example 2

[0056] 1) Under a nitrogen atmosphere, 9.6kg of dicyclohexylmethane diisocyanate, 18.2kg of polytetrahydrofuran ether glycol and 0.01kg of phosphoric acid were reacted at 90°C for 2 hours in a reactor equipped with reflux condenser, thermometer and stirring, using HG / T2409-1992 standard detects the isocyanate group content reduced to 1.5%;

[0057] 2) Cool down to 50℃, add 0.015kg stannous octoate, 1.5kg dimethylolpropionic acid, 0.08kg trimethylolpropane, 1.2kg trimethylolpropane polyoxypropylene polyoxyethylene ether, After 0.15 kg of 1,6-hexanediol and 9 kg of ethyl acetate, the temperature is increased to 80°C, and the reaction is kept at 80°C for 3.5 hours;

[0058] 3) Cool down to 40°C, add 0.08kg tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid] pentaerythritol ester, 0.03㎏ methyl tin mercaptan, stir for 15 minutes, then Add 1.0kg of dimethylaminoethanol to the reaction kettle to neutralize the reaction solution, and continue the reaction at 40...

Example Embodiment

[0061] Example 3

[0062] 1) Under argon atmosphere, 9.3kg of dicyclohexylmethane diisocyanate, 15.5kg of polytetrahydrofuran ether glycol and 0.008kg of phosphoric acid were reacted at 80℃ for 1.8 hours in a reactor equipped with reflux condenser, thermometer and stirring. HG / T2409-1992 standard detects that the content of isocyanate groups is reduced to 1.8%;

[0063] 2) Cool down to 45℃, add 0.007kg stannous octoate, 0.6kg dimethylolpropionic acid, 0.05kg trimethylolpropane, 0.7kg trimethylolpropane polyoxypropylene polyoxyethylene ether, After 0.1 kg of 1,6-hexanediol and 10 kg of propyl acetate, the temperature is increased to 80°C, and the reaction is continued for 3 hours while keeping the temperature at 80°C;

[0064] 3) Cool down to 45℃, add 0.06kg tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid] pentaerythritol ester, 0.02 ㎏ methyl tin mercaptan, stir for 13 minutes, then Add 0.8kg of dimethylaminoethanol to the reaction kettle to neutralize the reaction solut...

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Abstract

The invention provides an environment-friendly and safe waterborne polyurethane adhesive for synthetic leather and a preparation method thereof. The polyurethane adhesive is prepared mainly from the raw materials such as polytetrahydrofuran glycol, dicyclohexylmethylmethane diisocyanate, phosphoric acid, dimethylolpropionic acid, trimethylolpropane polyoxypropylene polyoxyethylene ether, isophorone diamine and deionized water. In a using process of the waterborne polyurethane adhesive for synthetic leather, the volatilized gas is water vapor which is harmless to environment, thereby greatly reducing the cost for controlling environmental pollution. The waterborne polyurethane adhesive for synthetic leather is insensitive to the environmental factors such as acid, alkali and electrolyte, and avoids the phenomenon of emulsion breaking caused by adding various auxiliaries; meanwhile, by adding a proper amount of carboxylic chain extender into the formula, the obtained waterborne polyurethane adhesive for synthetic leather has excellent performance such as high strength, high wear resistance, yellowing resistance, aging resistance, low-temperature resistance, folding resistance and good permeability.

Description

Technical field [0001] The invention belongs to the technical field of chemical industry and relates to a synthetic leather water-based polyurethane adhesive and a preparation method thereof. Background technique [0002] In the production process of traditional polyurethane synthetic leather, polyurethane resin containing high volatile organic solvent (VOC) is used as its basic raw material. This type of polyurethane resin is prepared by solvent polymerization, and the main solvent is high VOC solvent, such as two Methylformamide, acetone, toluene, xylene, methyl ethyl ketone, ethyl acetate, etc., these high-VOC organic solvents account for more than 60% of the entire resin composition, with large toxic and side effects, serious environmental pollution, inflammable and explosive, and extremely easy Cause a fire accident and seriously endanger the health of the operators. [0003] In Chinese patent CN102634318A, the amount of solvent added is 30-70%, and the solvent is preferably ...

Claims

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Application Information

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IPC IPC(8): C09J175/08C08G18/75C08G18/66C08G18/48C08G18/32C08G18/24
Inventor 刘文峰刘杰华马福兰闫克辉孙海园马金明刘娅林胡新霞王金明刘晓民
Owner SHANDONG TIANQING TECH DEV
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