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Moisture-curing polyurethane hot melt adhesive for automobile lighting and preparation method thereof

A polyurethane hot melt adhesive and moisture curing technology, which is applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve the problem of unsatisfactory operation time, short opening time of hot melt adhesive, and long bonding process and other problems, to achieve the effect of simple and easy process, easy large-scale production, and low sizing temperature

Inactive Publication Date: 2018-08-31
浙江吉仑高分子材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hot melt adhesive has a short opening time, and the bonding process of large and complex equipment takes a relatively long time, and its operating time cannot meet the requirements.

Method used

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  • Moisture-curing polyurethane hot melt adhesive for automobile lighting and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] This example provides a method for preparing a moisture-curing polyurethane hot-melt adhesive for car lamps, which specifically includes the following steps: in parts by mass, 39 parts of adipic acid-1,4-butanediol (PBA), 20 parts of polypropylene glycol, 20 parts of polyacrylic acid resin (molecular weight 20,000, Tg of 70°C) and 1 part of 1,4-butanediol as a chain extender are placed in a reactor, heated to 120°C, and stirred Vacuum dehydration for 1 hour, then add 20 parts of MDI, react under stirring for 2 hours, and vacuumize, when the NCO reaches the theoretical value, add 0.001 part of stannous octoate as a catalyst, vacuumize and stir for 30 minutes, and then pass nitrogen protection conditions The product is poured out, sealed and packaged to obtain a moisture-curing polyurethane hot-melt adhesive for car lights.

Embodiment 2

[0016] This example provides a method for preparing a moisture-curing polyurethane hot-melt adhesive for car lamps, which specifically includes the following steps: 29 parts by mass of 1,6-hexanediol adipate (PHA) , 35 parts of polytetrahydrofuran diol, 25 parts of polyacrylic acid resin (molecular weight 50,000, Tg of 50°C) and 1 part of 1,4-butanediol as a chain extender are placed in a reactor, heated to 120°C, Vacuum dehydration under stirring for 1 hour, then add 10 parts of MDI, react under stirring for 2 hours, and vacuumize, when the NCO reaches the theoretical value, add 0.01 part of stannous octoate as a catalyst, vacuumize and stir for 20 minutes, and then introduce The product was decanted under nitrogen protection conditions, sealed and packaged to obtain a moisture-curing polyurethane hot-melt adhesive for car lights.

Embodiment 3

[0018] This embodiment provides a method for preparing a moisture-curing polyurethane hot-melt adhesive for a car lamp, which specifically includes the following steps: 23 parts by mass of 1,6-hexanediol sebacate polyol, 40 parts of polypropylene glycol, 25 parts of polyacrylic acid resin (molecular weight 3000, Tg of 85 ° C) and 2 parts of diethylene glycol as a chain extender are placed in a reaction kettle, heated to 130 ° C, and vacuumed under stirring Dehydration for 1 hour, then add 10 parts of MDI, react under stirring for 2 hours, and vacuumize, when the NCO reaches the theoretical value, add 0.001 part of dimorpholino diethyl ether as a catalyst, vacuumize and stir for 20 min, The product was poured out under nitrogen protection conditions, sealed and packaged to obtain a moisture-curing polyurethane hot-melt adhesive for car lights.

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Abstract

The invention relates to a moisture-curing polyurethane hot melt adhesive for an automobile lighting and a preparation method thereof. The moisture-curing polyurethane hot melt adhesive is prepared from, by mass, 10-45 parts of polyester polyol, 20-55 parts of polyether polyol, 10-45 parts of polyacrylic resin, 0.01-5 parts of chain extender, 10-20 parts of isocyanate and 0.0001-0.001 parts of catalyst. The moisture-curing polyurethane hot melt adhesive for the automobile lighting has the advantages that the hot melt adhesive is prepared by copolymerizing polyhydric alcohols (hydroxide radical) containing active groups and isocyanate groups (NCO), the tail end of a polymer chain contains a reactive group NCO, and an irreversible cross-linking reaction between the NCO and moisture in the air or adhered matters can be performed, so that the high bonding strength is finally obtained.

Description

technical field [0001] The invention relates to a moisture-curing polyurethane hot-melt adhesive used for car lamps and a preparation method, which belongs to a reactive polyurethane hot-melt adhesive and belongs to the technical field of polyurethane hot-melt adhesive preparation. Background technique [0002] Chinese Invention Patent Application Publication No. CN102585753A discloses a polyurethane hot melt adhesive used for sealing automobile lamps. It vacuum-dehydrates highly crystalline polyester diol, polyester polyol, and tackifying resin under stirring, and then lowers the temperature; preheats diisocyanate, puts it into the reactor and stirs evenly, and performs prepolymerization; Add the metered catalyst, antioxidant, coupling agent, viscosity stabilizer, and gray slurry in turn under circulation and stir until they are evenly mixed; discharge the material under the condition of nitrogen protection, and seal the package to obtain the product polyurethane for lamp b...

Claims

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Application Information

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IPC IPC(8): C09J175/06C09J175/08C08G18/42C08G18/48C08G18/76C08G18/32C08G18/62C08G18/66
CPCC08G18/3206C08G18/3281C08G18/4063C08G18/4238C08G18/4825C08G18/4854C08G18/6229C08G18/6607C08G18/7671C09J175/06C09J175/08
Inventor 吴键儒平川
Owner 浙江吉仑高分子材料股份有限公司
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