Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Waterborne polyurethane adhesive and preparation method thereof

A water-based polyurethane and adhesive technology, used in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problem of low initial viscosity, improve the cohesion of the adhesive layer, promote strain-induced crystallization, and improve initial viscosity. and bond strength

Active Publication Date: 2021-10-26
温州市大宝高分子材料有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the polyurethane adhesive contains these two groups and shows high activity and polarity, it is applied to many substrates, such as foam, plastic, wood, leather, fabric, paper, ceramics and other porous materials, as well as metal, glass, etc. Materials with smooth surfaces such as rubber, plastic, etc. have excellent adhesion to them; however, the current water-based polyurethane adhesives have the problem of low initial viscosity, which still needs further improvement

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The application discloses a water-based polyurethane adhesive, and the raw materials include the following components:

[0050] Polytetrahydrofuran ether diol, isophorol diisocyanate, 1,4-butanediol, dimethylolpropionic acid, triethylamine, ethylenediamine, diethylformamide, undecylenamide, pentaerythritol tetra Thioglycolic acid ester, cross-linking agent, deionized water; wherein, the cross-linking agent is 2-ethylimidazole.

[0051] A kind of preparation method of aqueous polyurethane adhesive, comprises the steps:

[0052] S1. Dehydrate polytetrahydrofuran ether diol at 100°C and vacuum degree ≤ -0.8MPa for 1 hour; add 1,4-butanediol, isophorol diisocyanate and 0.2 parts of catalyst stannous octoate at 80°C, React for 3 hours; then cool down to 50°C, add 7 parts of dimethylolpropionic acid dissolved in diethylformamide, keep warm for 4 hours, then stir and add the remaining diethylformamide; after cooling to ≤50°C, add three Ethylamine was reacted for 8 minutes; s...

Embodiment 2

[0056]The application discloses a water-based polyurethane adhesive, and the raw materials include the following components:

[0057] Polytetrahydrofuran ether diol, isophorol diisocyanate, 1,4-butanediol, dimethylolpropionic acid, triethylamine, ethylenediamine, diethylformamide, undecylenamide, pentaerythritol tetra Thioglycolic acid ester, cross-linking agent, deionized water; wherein, the cross-linking agent is 2-ethylimidazole.

[0058] A kind of preparation method of aqueous polyurethane adhesive, comprises the steps:

[0059] S1. Dehydrate polytetrahydrofuran ether diol for 1.5h at 120°C and vacuum degree ≤ -0.8MPa; add 1,4-butanediol, isophorol diisocyanate and 0.3 parts of catalyst stannous octoate at 90°C , react for 4 hours; then lower the temperature to 60°C, add 10 parts of dimethylolpropionic acid dissolved in diethylformamide, keep the temperature for 5h, then stir and add the remaining diethylformamide; after cooling to ≤50°C, add Triethylamine was reacted fo...

Embodiment 3

[0063] The application discloses a water-based polyurethane adhesive, and the raw materials include the following components:

[0064] Polytetrahydrofuran ether diol, isophorol diisocyanate, 1,4-butanediol, dimethylolpropionic acid, triethylamine, ethylenediamine, diethylformamide, undecylenamide, pentaerythritol tetra Thioglycolic acid ester, cross-linking agent, deionized water; wherein, the cross-linking agent is 2-ethylimidazole.

[0065] A kind of preparation method of aqueous polyurethane adhesive, comprises the steps:

[0066] S1. Dehydrate polytetrahydrofuran ether diol for 1.2h at 110°C and vacuum degree ≤ -0.8MPa; add 1,4-butanediol, isophorol diisocyanate and 0.3 parts of catalyst stannous octoate at 85°C , react for 3.5h; then lower the temperature to 55°C, add 8 parts of dimethylolpropionic acid dissolved in diethylformamide, keep warm for 4.5h, then stir and add the remaining diethylformamide; cool to ≤50°C Then add triethylamine to react for 9 minutes; stir at...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a waterborne polyurethane adhesive and a preparation method thereof. The waterborne polyurethane adhesive is prepared from, by weight, 25-30 parts of polytetrahydrofuran ether glycol, 8-15 parts of isophorone diisocyanate, 0.8-1.2 parts of 1, 4-butanediol, 1-2 parts of dimethylolpropionic acid, 1-1.5 parts of triethylamine, 0.2-0.5 part of ethidene diamine, 10-15 parts of diethyl formamide, 5-7 parts of undecylenamide, 2-3 parts of pentaerythritol tetramercaptoacetate, 0.2-0.3 part of a cross-linking agent and 50-60 parts of deionized water. The invention relates to a preparation method of a waterborne polyurethane adhesive. The preparation method comprises the following steps of preparing matrix polyurethane, and mixing the matrix polyurethane with a cross-linked product of undecylenamide and pentaerythritol tetramercaptoacetate. Linear straight-chain undecylenamide and pentaerythritol tetramercaptoacetate are subjected to a crosslinking reaction to form a compact winding structure to obtain a tough net-shaped cross-linked substance, and the tough net-shaped cross-linked substance is further mixed with matrix polyurethane, so that the trend of promoting strain-induced crystallization is achieved, and better initial viscosity and mechanical properties are obtained.

Description

technical field [0001] The present application relates to the technical field of adhesives, in particular to a water-based polyurethane adhesive and a preparation method thereof. Background technique [0002] Polyurethane (PU) adhesive refers to the adhesive containing carbamate group (-NHCOO-) or isocyanate group (-NCO) in the molecular chain, which can be divided into two categories: polyisocyanate and polyurethane. Since the polyurethane adhesive contains these two groups and shows high activity and polarity, it is applied to many substrates, such as foam, plastic, wood, leather, fabric, paper, ceramics and other porous materials, as well as metal, glass, etc. Materials with smooth surfaces such as rubber, plastic, etc. have excellent adhesion to them; however, the current water-based polyurethane adhesives have the problem of low initial viscosity, which still needs further improvement. Contents of the invention [0003] In order to improve the initial tack of the pol...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J11/06C08G18/66C08G18/48C08G18/34C08G18/32
CPCC09J175/08C09J11/06C08G18/4854C08G18/3206C08G18/3228C08G18/348C08G18/6674C08G18/6685C08G18/6692C08G2170/00C08K5/20C08K5/37C08K5/32C08K5/1515C08K5/06
Inventor 鲁岗王甫俊
Owner 温州市大宝高分子材料有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com