Reactive hot melt adhesive composition as well as preparation method and application thereof

A technology of hot-melt adhesives and compositions, applied in the direction of adhesive types, polyurea/polyurethane adhesives, polymer adhesive additives, etc., to achieve the effect of increasing the reaction speed and the depth of colloid curing

Active Publication Date: 2019-01-18
GUANGDONG HENGDA NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a rapid assembly reaction type hot melt adhesive (PUR hot melt adhesive) to solve the problem of sealing and waterproofing of LED floodlights

Method used

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  • Reactive hot melt adhesive composition as well as preparation method and application thereof
  • Reactive hot melt adhesive composition as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Take 80g of isocyanate prepolymer A, 10g of tackifying resin, 1g of fumed silica (R972), 9g of silane-modified silicone resin D, and 0.02g of toluenesulfonyl isocyanate into the reaction kettle. At 80°C, vacuumize and mix for 60min. Add 0.10g of γ-aminopropyltrimethoxysilane (KH-540), a mixture of stannous octoate and 2'2-dimorpholinodiethyl ether (1:1) 0.1g. After vacuum mixing for 15 minutes. Vacuum defoaming for 30min. Glue out. Pour into the mold to measure the curing depth and shear strength test.

Embodiment 2

[0044] Take 70g of isocyanate prepolymer A, 10g of tackifying resin, 1g of fumed silica (R972), 19g of silane-modified silicone resin D, and 0.02g of toluenesulfonyl isocyanate into the reaction kettle. At 80°C, vacuumize and mix for 60min. Add 0.20g of γ-aminopropyltrimethoxysilane (KH-540), a mixture of stannous octoate and 2'2-dimorpholinodiethyl ether (1:1) 0.1g. After vacuum mixing for 15 minutes. Vacuum defoaming for 30min. Glue out. Pour into the mold to measure the curing depth and shear strength test.

Embodiment 3

[0046] Take 60g of isocyanate prepolymer A, 10g of tackifying resin, 1g of fumed silica (R972), 29g of silane-modified silicone resin D, and 0.02g of toluenesulfonyl isocyanate into the reaction kettle. At 80°C, vacuumize and mix for 60min. Add 0.30g of γ-aminopropyltrimethoxysilane (KH-540), a mixture of stannous octoate and 2'2-dimorpholinodiethyl ether (1:1) 0.1g. After vacuum mixing for 15 minutes. Vacuum defoaming for 30min. Glue out. Pour into the mold to measure the curing depth and shear strength test.

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Abstract

The invention relates to the field of high molecular materials and discloses a reactive hot melt adhesive composition. The reactive hot melt adhesive composition comprises the following components inpercentage by weight: 55-80 percent of a bi-functional and/or poly-functional isocyanate terminated pre-polymer, 2-20 percent of tackifying resin, 5-30 percent of silane-modified silicone resin, 0.01-1 percent of a cross-linking agent and 1-10 percent of fumed silica as well as an optional additive. The invention further discloses a preparation method and application of the reactive hot melt adhesive composition. The reactive hot melt adhesive composition has relatively high curing speed and is especially suitable for the lighting industry.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a reactive hot-melt adhesive composition and its preparation method and application. Background technique [0002] The traditional solution for sealing and waterproofing of LED floodlights is to use silicone sealing rings and screws to lock them. The production efficiency is low, and the waterproof and dustproof performance is average, which can only reach the IP65 level. The second method is to use one-component silica gel for bonding and sealing. The glue dries very slowly, which affects the next operation process such as handling and assembly, resulting in serious accumulation of semi-finished products in the warehouse and low production efficiency. Some silica gel will release low-molecular gas, which will cause fog in the lamp, and may even cause the lamp bead to turn yellow after vulcanization. At present, most of the LED floodlight industry adopts one-component silica gel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J183/04C09J11/04C09J11/06C09J11/08
CPCC08L2203/20C08L2205/03C09J11/04C09J11/06C09J11/08C09J175/08C08L83/04C08K13/02C08K3/36C08K5/544
Inventor 何丹周为民
Owner GUANGDONG HENGDA NEW MATERIALS TECH
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