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Reactive polyurethane hot melt adhesive and preparation method thereof

A polyurethane hot-melt adhesive, reactive technology, applied in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problem of low initial adhesion of hot-melt adhesives

Active Publication Date: 2021-07-09
苏州合邦鑫材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problem of low initial cohesion of the existing reactive polyurethane hot melt adhesive, the present invention provides a reactive polyurethane hot melt adhesive

Method used

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  • Reactive polyurethane hot melt adhesive and preparation method thereof
  • Reactive polyurethane hot melt adhesive and preparation method thereof
  • Reactive polyurethane hot melt adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] In the present embodiment, the molecular weight is 42 parts of crystalline polyester polyols of 3500, the molecular weight is 29 parts of amorphous polyester polyols of 3500, and the molecular weight is 29 parts of polyoxypropylene diols of 2000, shown in formula (I) 10 parts of the compound, wherein R is CH 2 CH 2 Alkyl, 29 parts of 4,4'-diphenylmethane diisocyanate, 20 parts of thermoplastic acrylic resin, photoinitiator 2-hydroxy-2-methyl-1-phenyl-1-propanone, and 2,4,6 - 0.5 parts of trimethylbenzoyl-diphenylphosphine oxide and methyl benzoylformate, antioxidant tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid] A total of 0.32 parts of pentaerythritol ester and β-(3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate, 1.5 parts of silane coupling agent γ-glycidyl etheroxypropyl trimethoxysilane .

[0061] Stir and mix polymer polyols, compounds containing acrylate-based diols, and antioxidants, heat up to 120°C, and dehydrate for 0.5 hours under a v...

Embodiment 2

[0063] In this example, its specific implementation is similar to Example 1, except that: 50 parts of crystalline polyester polyols with a molecular weight of 3500, 25 parts of amorphous polyester polyols with a molecular weight of 3500, and a molecular weight of 2000 25 parts of polyoxypropylene diols, 9 parts of compounds shown in formula (I), wherein R is CH 2 CH 2 Alkyl, 28 parts of 4,4'-diphenylmethane diisocyanate, 19 parts of thermoplastic acrylic resin, photoinitiator 2-hydroxy-2-methyl-1-phenyl-1-propanone and 1-hydroxycyclohexylbenzene A total of 0.65 parts of methyl ketone, 0.46 parts of antioxidant tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, silane coupling agent γ-glycidyl ether oxypropyl 1.4 parts of trimethoxysilane.

Embodiment 3

[0065] In this example, its specific implementation is similar to that of Example 1, except that: 48 parts of crystalline polyester polyols with a molecular weight of 3500, 24 parts of amorphous polyester polyols with a molecular weight of 3500, and a molecular weight of 2000 28 parts of polyoxypropylene diols, 12 parts of compounds shown in formula (I), wherein R is CH 2 CH 2 CH 2 Alkyl, 31 parts of 4,4'-diphenylmethane diisocyanate, 25 parts of terpene resin, photoinitiator 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone and 2, A total of 0.55 parts of 4,6-trimethylbenzoyl-diphenylphosphine oxide, antioxidant tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and β - 0.3 parts of octadecyl (3,5-di-tert-butyl-4-hydroxyphenyl) propionate in total, and 1.5 parts of silane coupling agent γ-methylpropionyloxypropyl trimethoxysilane.

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Abstract

The invention provides a reactive polyurethane hot melt adhesive and a preparation method thereof. The reactive polyurethane hot melt adhesive comprises the following components: polymer polyol, a dihydric alcohol compound containing an acrylate group, 4, 4 '-diphenylmethane diisocyanate and a photoinitiator. The reactive polyurethane hot melt adhesive has the advantages that the initial bonding force is improved, and quick positioning of an adhered accessory is realized.

Description

technical field [0001] The invention relates to the technical field of hot melt adhesives, in particular to a reactive polyurethane hot melt adhesive and a preparation method thereof. Background technique [0002] Hot melt adhesive is a kind of plastic adhesive. Its physical state changes with temperature within a certain temperature range, but its chemical properties remain unchanged. Because the product itself is solid, it is easy to pack, transport, store, solvent-free, Non-polluting, non-toxic, simple production process, high value-added, strong bonding strength, fast speed and other advantages are favored. However, due to the lack of chemical crosslinking reaction, traditional hot melt adhesives only rely on physical bonding, resulting in limited bonding strength, which limits their application fields to a certain extent. Polyurethane adhesives have become fast-growing adhesives in recent years due to their excellent bonding properties and adaptability to various subst...

Claims

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Application Information

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IPC IPC(8): C09J175/14C08G18/67
CPCC09J175/14C08G18/675
Inventor 赵文丰李建波常迪
Owner 苏州合邦鑫材科技有限公司
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