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Dual-curing polyurethane hot melt adhesive and preparation and using methods thereof

A polyurethane hot-melt adhesive and dual-cure technology, which is applied in the field of polyurethane hot-melt adhesives, can solve problems such as low initial adhesion and long curing time, and achieve the effects of improved compatibility, high bonding strength, and good toughness

Active Publication Date: 2019-03-01
SHANGHAI ZHIGUAN HIGH POLYMER MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The moisture curing operation is simple, the final bonding strength is high, green and environmentally friendly, and the production process is mature, but the curing time is long and the initial adhesion is low

Method used

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  • Dual-curing polyurethane hot melt adhesive and preparation and using methods thereof
  • Dual-curing polyurethane hot melt adhesive and preparation and using methods thereof
  • Dual-curing polyurethane hot melt adhesive and preparation and using methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053](1) Take by weighing molecular weight 2000 polyhexamethylene adipate diol 90.00g, molecular weight 3000 polyhexamethylene adipate diol 13.50g, molecular weight 2000 polytetrahydrofuran ether diol 18.00g, antioxidant 1010 1.70g 17.00g of acrylic resin, 13.80g of tetrahydrofuran acrylate and 8.29g of ethoxyethoxyethyl acrylate were added to a 1.0L four-necked flask, stirred and heated to 110-120°C, and vacuum dehydrated at an absolute pressure of 80Pa for 120min .

[0054] (2) Cool down to 80°C, blow in nitrogen to release the vacuum, add 37.80g of 4,4'-diphenylmethane diisocyanate (MDI), 3.73g of isophorone diisocyanate (IPDI), catalyst dibutyltin dilaurate 1.70g, then turn off the nitrogen and react for 60min at 85-95°C and absolute pressure less than 100Pa;

[0055] (3) Introduce nitrogen to release the vacuum, add 5.50 g of 2-(4-benzoyl-3-hydroxyphenoxy) ethyl methacrylate, 1.42 g of chain extender 1,4-butanediol, and silane coupling Agent KH-560 1.50g, KH-570 1.05g,...

Embodiment 2

[0059] (1) Weigh 90.00g of polyhexamethylene adipate diol with a molecular weight of 2000, 20.25g of polyhexamethylene adipate diol with a molecular weight of 3000, 9.00g of polytetrahydrofuran ether diol with a molecular weight of 2000, and 1.72g of antioxidant 1010 25.72g of acrylic resin, 10.97g of tetrahydrofuran acrylate, and 16.45g of ethoxyethoxyethyl acrylate were added to a 1.0L four-neck flask, stirred and heated to 110-120°C, and vacuum dehydrated at an absolute pressure of 80Pa for 120min .

[0060] (2) Cool down to 80°C, blow in nitrogen to release the vacuum, add 33.36g of 4,4'-diphenylmethane diisocyanate (MDI), 9.88g of isophorone diisocyanate (IPDI), catalyst dibutyltin dilaurate 1.72g, then turn off the nitrogen and react for 60min at 85-95°C and absolute pressure less than 100Pa;

[0061] (3) Introduce nitrogen to release the vacuum, add 7.71g of 2-(4-benzoyl-3-hydroxyphenoxy)ethyl methacrylate, 1.22g of chain extender 1,4-butanediol, and silane coupling A...

Embodiment 3

[0065] (1) Take by weighing molecular weight 2000 polyhexamethylene adipate diol 90.00g, molecular weight 3000 polyhexamethylene adipate diol 27.0g, molecular weight 2000 polytetrahydrofuran ether diol 27.0g, antioxidant 1010 2.00g 24.0g of acrylic resin, 20.00g of tetrahydrofuran acrylate and 19.99g of ethoxyethoxyethyl acrylate were added to a 1.0L four-necked flask, stirred and heated to 110-120°C, and vacuum dehydrated at an absolute pressure of 80Pa for 120min .

[0066] (2) Cool down to 80°C, blow in nitrogen to release the vacuum, add 41.34g of 4,4'-diphenylmethane diisocyanate (MDI), 9.18g of isophorone diisocyanate (IPDI) and catalyst dibutyltin dilaurate 2.00g, then turn off the nitrogen and react for 60min at 85-95°C and absolute pressure less than 100Pa;

[0067] (3) Introduce nitrogen to release the vacuum, add 4.41g of 2-(4-benzoyl-3-hydroxyphenoxy)ethyl methacrylate, 1.01g of chain extender 1,4-butanediol, silane coupling Agent KH-560 0.60g and KH-570 0.40g, t...

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Abstract

The invention discloses a dual-curing polyurethane hot melt adhesive and preparation and using methods thereof. The dual-curing polyurethane hot melt adhesive is prepared from a main material and an auxiliary material, wherein the main material is prepared from the flowing raw material components: polyester polyol, polyether polyol, a chemical modifier, isocyanate and a chain extender, and the auxiliary material is prepared from the flowing raw material components: a physical modifier, a catalyst, a silane coupling agent, a photoinitiator, an antioxygen and white carbon black. According to thetechnical scheme, the UV light / wet dual-curing polyurethane hot melt adhesive has the advantages of a wet curing polyurethane hot melt adhesive and an ultraviolet curing hot melt adhesive and meanwhile overcomes the disadvantages of the wet curing polyurethane hot melt adhesive and the ultraviolet curing hot melt adhesive; and the UV light / wet dual-curing polyurethane hot melt adhesive is synthesized through the chemical modifier and adopts an acrylate diluent as aiding to be blended to improve compatibility of the components, and a polyurethane hot melt adhesive product which is high in initial bonding strength, good in tenacity, high in weather resistance and convenient to construct is obtained.

Description

technical field [0001] The invention relates to a polyurethane hot-melt adhesive, in particular to a dual-cure polyurethane hot-melt adhesive and a preparation method and application method thereof. Background technique [0002] Hot-melt adhesive is solid at room temperature, it melts into a viscous liquid when heated to a certain temperature, and becomes solid after cooling to room temperature, and has a strong bonding effect. [0003] UV light curing refers to the process in which photoinitiators are rapidly decomposed into free radicals under the irradiation of ultraviolet light of appropriate wavelength and intensity, which triggers the crosslinking of unsaturated organic compounds to form macromolecules. UV curing speed is fast, energy saving and time saving, less pollution, and excellent product performance, but it can only be applied to transparent materials, and the development and application time is relatively short, and the technology is immature. Moisture curing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/14C09J11/04C08G18/66C08G18/67C08G18/48C08G18/42C08G18/32
CPCC08G18/3206C08G18/4238C08G18/4854C08G18/6607C08G18/672C09J11/04C09J175/14C08K3/36
Inventor 曾作祥宗泽刚李健坤薛为岚贾成良王伟秦平
Owner SHANGHAI ZHIGUAN HIGH POLYMER MATERIAL CO LTD
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