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Reactive polyurethane hot melt adhesive with multiple curing modes and preparation method thereof

A polyurethane hot-melt adhesive, multi-curing technology, used in polyurea/polyurethane adhesives, adhesives, adhesive additives, etc., can solve the problems of inability to achieve positioning effect, meet assembly requirements, affect efficiency, etc., to improve stability Good performance, wide range of substrates, high initial tack

Inactive Publication Date: 2021-11-02
广东巨圣新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the initial shear strength of conventional moisture-curing polyurethane hot-melt adhesives is generally less than 0.25MPa, which is relatively low. When it is applied, it cannot achieve a faster positioning effect, that is, it cannot meet the assembly requirements in a short period of time. affect efficiency

Method used

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  • Reactive polyurethane hot melt adhesive with multiple curing modes and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: A reactive polyurethane hot melt adhesive having a multi-cured manner comprising a component having a number of parts by weight: 10 parts of an aromatic or alicyclic diisocyanate, 20 parts of polytex hydrofuran, epoxy resin 5 serving, 10 parts of silane coupling, 0.05 thermoplastic polyurethane elastomers, 0.01 antioxidants, 0.01 parts of catalyst and 0.01 parts of adhesion promoter;

[0022] The silane coupling agent is gamma-methyloxypropyltrimethoxysilane;

[0023] The NCO% content of the reaction type polyurethane hot melt adhesive having a multiple curing method is 1.5%.

[0024] The aromatic or alicyclic diisocyanate is at least one of toluene diisocyanates and isridone diisocyanates.

[0025] The thermoplastic polyurethane elastomer is a polyurethane elastomer which is selected from the group consisting of dic acid-1,6-hexanediol ester diol, hyeta dikanol ester diol and HDI.

[0026] The antioxidant is four [methyl-β- (3,5-di-tert-butyl-4-hydroxyphenyl) pr...

Embodiment 2

[0033] Example 2: A reactive polyurethane hot melt adhesive having a multi-cured manner comprising a component having a number of parts: aromatic or alicyclic diisocyanate 20 parts, 35 polytetrahydrofuran glycols, epoxy resin 10 parts, 25 parts of silane coupling, 0.15 parts of thermoplastic polyurethane elastomer, 0.35 parts of antioxidant, 0.3 parts of catalyst and 0.05 parts of adhesion promoter;

[0034] The silane coupling agent is gamma- (2,3-cyclopropoxy) propyltrimethoxysilane;

[0035] The NCO% content of the reaction type polyurethane hot melt adhesive having a multiple curing method is 2.0%.

[0036] The aromatic or alicyclic diisocyanate is a dicyclohexylmethyl isocyanate.

[0037] The thermoplastic polyurethane elastomer is a polyurethane elastomer which is selected from the group consisting of dic acid-1,6-hexanediol ester diol, hyeta dikanol ester diol and HDI.

[0038] The antioxidant is at least one of a 2,6-di-tert-butyl to a cresol (antioxidant 264).

[0039] Th...

Embodiment 3

[0045] Example 3: A reactive polyurethane hot melt adhesive having a multi-cured method, including components having a number of parts by weight: 30 parts of aromatic or alicyclic diisocyanate, 50 parts of polytetrahydrofuranol, epoxy resin 15 parts, 40 silane coupling agents, 0.5 parts of thermoplastic polyurethane elastomer, 0.1 parts of antioxidants, 0.5 parts of catalyst and 0.1 parts of adhesion promoter;

[0046] The silane coupling agent is γ-aminopropyltriethoxysilane;

[0047] The NCO% content of the reaction type polyurethane hot melt adhesive having a multiple curing method is 3.0%.

[0048] The aromatic or alicyclic diisocyanate is toluene diisocyanate, dicyclohexamol diisocyanate and isofluorone diisocyanate.

[0049] The thermoplastic polyurethane elastomer is a polyurethane elastomer which is selected from the group consisting of dic acid-1,6-hexanediol ester diol, hyeta dikanol ester diol and HDI.

[0050] The antioxidant is four [methyl-β- (3,5-di-tert-butyl-4-hyd...

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Abstract

The invention discloses a reactive polyurethane hot melt adhesive with multiple curing modes and a preparation method of the reactive polyurethane hot melt adhesive. The hot melt adhesive comprises the following components in parts by weight: 10 to 30 parts of aromatic or alicyclic diisocyanate, 20 to 50 parts of polytetrahydrofuran glycol, 5 to 15 parts of epoxy resin, 10 to 40 parts of a silane coupling agent, 0.05 to 0.5 part of a thermoplastic polyurethane elastomer, 0.01 to 0.1 part of an antioxidant, 0.01 to 0.5 part of a catalyst and 0.01 to 0.1 part of an adhesion promoter, the silane coupling agent is n-azobis (isobutylamidine hydrochloride); the content of NCO in the reactive polyurethane hot melt adhesive with the multiple curing modes is 1.5%-3.0%, the prepared hot melt adhesive has relatively high initial shear strength performance on the basis of meeting the conventional performance.

Description

Technical field [0001] The present invention belongs to the field of hot melt glue, and more particularly to a reactive polyurethane hot melt adhesive having a multi-curing method and a preparation method thereof. Background technique [0002] Wet curing polyurethane hot melt is a class-NCO group-containing polyurethane adhesive. When used, heating the melt application, and the physical curing is cooled to generate the preliminary adhesive force, and the end-NCO in the rubber layer is reacted with moisture in the air or the activation of the hydrogen compound of the adherend surface, producing chemical The process occurs, the process occurs, is an irreversible chemical reaction. Wet curing polyurethane hot melt glue is expected to be widely used in woodworking materials, textile fabrics, automotive interior and electronic appliances. [0003] At present, the initial shear intensity of conventional wet curing polyurethane hot melt glue is generally less than 0.25 MPa, relatively l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C08G18/40C08G18/48C08G18/58C08G18/67C09J11/06C09J11/08
CPCC09J175/08C09J11/06C09J11/08C08G18/672C08G18/4854C08G18/58C08G18/4045C08L2207/04C08L75/06C08K5/5419C08K5/5435C08K5/544C08G18/40
Inventor 郭松华
Owner 广东巨圣新材料科技有限公司