Waterborne polyurethane adhesive with long persistent viscosity and preparation method thereof

A water-based polyurethane and adhesive technology, used in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of long activation time, high activation temperature, and short sticking time

Active Publication Date: 2021-05-18
重庆中科力泰高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the commonly used water-based polyurethane adhesives have the disadvantages of short holding time, high activation temperature or long activation time in the bonding of automotive interiors, which seriously affects the efficiency of workers and still needs to be further improved.

Method used

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  • Waterborne polyurethane adhesive with long persistent viscosity and preparation method thereof
  • Waterborne polyurethane adhesive with long persistent viscosity and preparation method thereof
  • Waterborne polyurethane adhesive with long persistent viscosity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of preparation method of long-lasting viscous water-based polyurethane adhesive containing Si-O-Si structure (telechelic structure) at both ends

[0039] In parts by mass, its raw materials include: 22.23 parts of isophorone diisocyanate, 111.2 parts of polybutylene adipate, 22.8 parts of polyneopentyl adipate, 0.72 parts of 1,4-butanediol Parts, BY-3306B 7.82 parts, single-ended hydroxymethyl polydimethylsiloxane 14.22 parts, dibutyltin dilaurate 0.05 parts, deionized water 210 parts, acetone 170 parts.

[0040] The specific steps of the preparation method are:

[0041]f. According to the above-mentioned parts by mass, vacuum dehydrate polybutylene adipate and polyneopentyl adipate at 120°C for 1.0-1.5h, cool down to 75°C and add isophorone di Isocyanate, nitrogen protection reaction at 80-85°C for 2.5h to obtain a prepolymer with an -NCO group at the end;

[0042] g. Add 10-20 parts of solvent acetone to the obtained prepolymer to adjust the viscosity, and lo...

Embodiment 2

[0054] A kind of preparation method of long-lasting viscous water-based polyurethane adhesive containing Si-O-Si structure (telechelic structure) at both ends

[0055] In parts by mass, its raw materials include: 11.12 parts of isophorone diisocyanate, 8.41 parts of hexamethylene diisocyanate, 111.2 parts of polybutylene adipate diol, 22.2 parts of polycaprolactone diol 0.72 parts of 1,4-butanediol, 5.5 parts of BY-3306, 13.77 parts of single-ended hydroxymethyl polydimethylsiloxane, 0.05 parts of dibutyltin dilaurate, 200 parts of deionized water, and 170 parts of acetone.

[0056] The preparation method is the same as in Example 1.

Embodiment 3

[0058] A kind of preparation method of the long-lasting viscous water-based polyurethane adhesive that contains Si-O-Si structure (telechelic structure) at both ends:

[0059] In terms of parts by mass, its raw materials include: 10.09 parts of 1,6-hexamethylene diisocyanate, 10.48 parts of 4,4-dicyclohexane diisocyanate, 115.2 parts of neopentyl glycol adipate, 1, 0.9 parts of 4-butanediol, 28.8 parts of BY-3301, 16.2 parts of single-ended hydroxymethyl polydimethylsiloxane, 0.03 parts of stannous octoate, 220 parts of deionized water, and 180 parts of acetone.

[0060] The specific steps of the preparation method are:

[0061] a. According to the above-mentioned parts by mass, vacuum dehydrate poly(neopentyl glycol adipate) diol at 120°C for 1.0-1.5h, cool down to 75°C and add 1,6-hexamethylene diisocyanate, Reaction under nitrogen protection at 80-85°C for 2.5 hours to obtain a prepolymer with an -NCO group at the end;

[0062] b. Add 10-20 parts of solvent acetone to the...

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Abstract

The invention relates to a waterborne polyurethane adhesive with long persistent viscosity. The structure of polyurethane in the adhesive is shown as a formula I in the specification. The invention further provides a preparation method of the waterborne polyurethane adhesive, and the obtained polyurethane adhesive has a telechelic structure and a long persistent viscosity. Hydroxyalkyl polysiloxane is introduced to the end of the polyurethane molecular structure, the finally obtained waterborne polyurethane adhesive product has the capability of keeping viscosity for a long time and strong adhesive force by optimizing the proportion of macromolecular polyol, sulfonic acid type polyester polyol, diisocyanate, micromolecular alcohol chain extender, polysiloxane and catalyst, meanwhile, the activation temperature of the adhesive is reduced to a certain extent, particularly, when the adhesive is used as an automotive trim adhesive, the construction efficiency can be obviously improved, the working intensity can be reduced, and the quality of downstream products can be improved.

Description

technical field [0001] The invention belongs to the field of water-based polyurethane adhesives for automotive interior decoration, and in particular relates to a water-based polyurethane adhesive with a teleclaw structure and long-lasting adhesive properties and a preparation method thereof. Background technique [0002] Car interior generally uses artificial leather, artificial carpet, velvet and other materials to increase the beauty and touch of the car interior. The main application parts include door panels, seats, instrument panels, ceilings, carpets, etc. At present, a large number of flammable, toxic, and environmentally polluting solvent-based adhesives are still used for bonding. With the industry and the country's stricter requirements and control of pollutants and VOC in cars, it is inevitable to use glue for automotive interiors. trend. However, the commonly used water-based polyurethane adhesives have the disadvantages of short holding time, high activation t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C08G18/66C08G18/42C08G18/61C08G18/32C08G18/12
CPCC09J175/06C08G18/664C08G18/4202C08G18/42C08G18/61C08G18/3206C08G18/12C08G18/6511Y02E60/10
Inventor 杜泽川冯丽冉忠祥白德忠刘海春何彬
Owner 重庆中科力泰高分子材料有限公司
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