Tertiary-amine-group-containing polyacrylic acid resin modified reaction-type polyurethane hot melt glue and preparation thereof

A technology containing tertiary amine group polyacrylic acid and tertiary amine group polyacrylic acid, applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve the problem of non-polar materials and metal substrate bonding requirements, the influence of the operation and use process of polyurethane hot-melt adhesive, the viscosity increase of reactive polyurethane hot-melt adhesive, etc., to achieve the effect of improving initial bonding strength, moderate viscosity and moderate opening time

Inactive Publication Date: 2019-05-17
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are relatively limited in improving the initial bonding strength, and cannot meet the requirements of high initial strength and fast process applications; in addition, with the increase in the diversity of substrates to be bonded and the increase in the occupancy of plastic and metal substrates, The existing reactive polyur

Method used

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  • Tertiary-amine-group-containing polyacrylic acid resin modified reaction-type polyurethane hot melt glue and preparation thereof
  • Tertiary-amine-group-containing polyacrylic acid resin modified reaction-type polyurethane hot melt glue and preparation thereof
  • Tertiary-amine-group-containing polyacrylic acid resin modified reaction-type polyurethane hot melt glue and preparation thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] In a reactor equipped with a vacuum and nitrogen protection device, add 40 parts of polyester polyol, 40 parts of polyether polyol, and 5 parts of polyacrylic resin containing tertiary amino group according to weight. After vacuum dehydration for 2 hours, add 19.45 parts of polyisocyanate and 0.05 parts of catalyst by weight, react under nitrogen atmosphere for 2 hours, add 0.5 parts of silane coupling agent, stir evenly, and discharge under nitrogen protection.

Embodiment 2

[0035]In a reactor equipped with a vacuum and nitrogen protection device, add 40 parts of polyester polyol, 40 parts of polyether polyol and 10 parts of polyacrylic resin containing tertiary amino groups, and add them at 110-120 °C After vacuum dehydration for 1 hour, add 19.45 parts of polyisocyanate and 0.05 parts of catalyst by mass, react under nitrogen atmosphere for 3 hours, add 0.5 parts of silane coupling agent, stir evenly, and then discharge under nitrogen protection.

Embodiment 3

[0037] In a reactor equipped with a vacuum and nitrogen protection device, add 40 parts of polyester polyol, 40 parts of polyether polyol and 20 parts of polyacrylic resin containing tertiary amino groups, and add them at 110-120 °C After vacuum dehydration for 3 hours, add 19.45 parts of polyisocyanate and 0.05 parts of catalyst by mass, react under nitrogen atmosphere for 4 hours, add 0.5 parts of silane coupling agent, stir evenly, and discharge under nitrogen protection to obtain the product.

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Abstract

The invention relates to tertiary-amine-group-containing polyacrylic acid resin modified reaction-type polyurethane hot melt glue and preparation thereof. The hot melt glue is prepared from the following raw material components in parts by weight: 10-40 parts of polyester polyol, 10-40 parts of polyether polyol, 10-30 parts of polyisocyanates, 1-40 parts of tertiary-amine-group-containing polyacrylic acid resin, 0.01-1 part of a catalyst and 0.05-5 parts of a silane coupling agent. Compared with the prior art, the bonding strength of various base materials is greatly improved, especially the initial bonding strength and the final bonding strength of metal and non-polar plastic base materials are greatly improved; and meanwhile, the viscosity and the opening time are moderate, a process iseasy to use and operate, and the using requirements of different industrial application fields can be met.

Description

technical field [0001] The invention belongs to the technical field of hot-melt adhesives, and relates to a reactive polyurethane hot-melt adhesive modified by polyacrylic resin containing tertiary amino groups and its preparation. Background technique [0002] Reactive polyurethane hot melt adhesive is an adhesive with both heating melting and reaction curing properties. It has been rapidly developed and widely used in recent years, and plays an important role in assembly industries such as automobiles, electronics, and home appliances. In these application fields, there are many kinds of materials to be adhered, and plastic and metal materials occupy a considerable proportion, and the bonding of non-polar plastics and metals is relatively difficult to bond. [0003] The main component of reactive polyurethane hot melt adhesive is isocyanate-terminated polyurethane prepolymer, which will react with moisture in the environment after sizing to cross-link and solidify. Compar...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J175/06C08G18/48C08G18/42C08G18/62
Inventor 王贵友阮朦梦朱芸
Owner EAST CHINA UNIV OF SCI & TECH
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