A high-strength and high-weather resistance two-component polyurethane structural adhesive and its preparation method

A two-component polyurethane, weather resistance technology, applied in polyurea/polyurethane adhesives, chemical instruments and methods, adhesives, etc., can solve the problems of low tensile strength and elongation at break, poor weather resistance, aging, etc. Achieve the effect of improving flexibility, ensuring stable quality, good weather resistance and flexibility

Active Publication Date: 2022-04-26
广州布鲁奥申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

[0004] During the process of charging and discharging, the power battery will release a lot of heat. Generally, the battery box will have a cooling device, but the normal working temperature of the battery will still reach about 40-60°C. For ordinary polyurethane structural adhesives, it will take a long time The heat will cause it to age rapidly, and the bonding performance will decrease with the increase of use time
At present, there are some polyurethane structural adhesives used for bonding pouch battery cells, but although these products have high bonding strength at room temperature, the bonding strength decreases by about 50% at 60°C, and the weather resistance of polyurethane structural adhesives is poor. Poor, and also low tensile strength and elongation at break (i.e. poor flexibility)

Method used

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  • A high-strength and high-weather resistance two-component polyurethane structural adhesive and its preparation method
  • A high-strength and high-weather resistance two-component polyurethane structural adhesive and its preparation method
  • A high-strength and high-weather resistance two-component polyurethane structural adhesive and its preparation method

Examples

Experimental program
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preparation example Construction

[0066] On the other hand, the present invention also provides a method for preparing a high-strength and high-weather resistance two-component polyurethane structural adhesive, comprising the following steps:

[0067] Step S1, preparation of component A: add linear macromolecular hydroxymethacrylate resin, hydroxyl-terminated polyol, tackifying resin, environmental protection plasticizer, flame retardant plasticizer Stir for 10-15 minutes at rpm to mix the liquid raw materials evenly; then add thermally conductive fillers and flame-retardant fillers, and stir for 10 minutes at a speed of 20-30 rpm. When the powder completely forms a paste with the liquid raw materials, increase the Stir at a speed of 800-1100 rpm, and heat to 110-120°C at the same time. Under a vacuum degree of ≤-0.095MPa, stir and dehydrate for 2-3 hours. After the moisture content is tested to be less than 500ppm, cool down to below 60°C; Curing agent, coupling agent, catalyst, stirred for 20-30 minutes, dis...

Synthetic example 1

[0075] This synthesis example provides a kind of linear macromolecular hydroxymethacrylate resin, and its preparation raw material comprises: dipropylene glycol dibenzoate: 20 parts, methyl methacrylate: 38 parts, n-butyl acrylate Esters: 14 parts, mercaptoethanol: 2 parts, styrene: 10 parts, lauryl methacrylate: 10 parts, 2-hydroxyethyl acrylate: 5 parts, azobisbutyronitrile: 0.5 parts, 2,6- Di-tert-butyl-p-cresol: 0.5 parts.

[0076] Above-mentioned linear macromolecule hydroxymethacrylate resin synthesis method comprises:

[0077]Add the above amount of dipropylene glycol dibenzoate, methyl methacrylate, n-butyl acrylate, and mercaptoethanol into the reaction kettle, open the condensing device and stirring device, feed nitrogen, heat to 75°C, and add 0.2 parts of Azobisbutyronitrile, stirred and dissolved, and reacted at 75°C for 1h, added dropwise a mixed solution composed of styrene, lauryl methacrylate, and 0.2 parts of azobisbutyronitrile, and the dropwise addition was...

Synthetic example 2

[0079] This synthesis example provides a kind of linear macromolecular hydroxymethacrylate resin, and its preparation raw material comprises: dipropylene glycol dibenzoate: 15 parts, methyl acrylate: 40 parts, ethyl acrylate: 8 parts by weight , mercaptoethanol: 1 part, styrene: 16 parts, lauryl methacrylate: 10 parts, 2-hydroxyethyl methacrylate: 8 parts, azobisbutyronitrile: 1 part, 2,6-di-tert Butyl p-cresol: 1 part.

[0080] Above-mentioned linear macromolecule hydroxymethacrylate resin synthesis method comprises:

[0081] Add dipropylene glycol dibenzoate, methyl acrylate, ethyl acrylate, and mercaptoethanol in the above proportions into the reaction kettle, open the condensing device and stirring device, feed nitrogen, heat to 75°C, and add 0.4 parts of azobis Butyronitrile, stir to dissolve, and react at 75°C for 1h, add dropwise a mixed solution composed of styrene, lauryl methacrylate, and 0.4 parts of azobisbutyronitrile, complete the dropwise addition within 1h, an...

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Abstract

The invention discloses a high-strength and high-weather resistance two-component polyurethane structural adhesive and a preparation method thereof, belonging to the technical field of polyurethane structural adhesives. The problems of poor weather resistance, poor flexibility and unstable quality of existing polyurethane structural adhesives are solved. High-strength and high-weather resistance two-component polyurethane structural adhesive is made by mixing component A and component B. Among them, the raw materials of component A include: linear macromolecular hydroxymethacrylate resin, hydroxyl-terminated polyol, tackifying resin , Environmentally friendly plasticizers, flame retardant plasticizers, flame retardant fillers, thermally conductive fillers, silane coupling agents, latent curing agents, catalysts; the raw materials of component B include: polyisocyanate curing agent. The high-strength and high-weather resistance two-component polyurethane structural adhesive of the present invention has high strength, good weather resistance, good flexibility and stable quality.

Description

technical field [0001] The invention belongs to the technical field of polyurethane structural adhesives, in particular to a high-strength and high-weather resistance two-component polyurethane structural adhesive and a preparation method thereof. Background technique [0002] At present, pouch batteries are widely used in new energy vehicles due to their good safety performance, light weight, large capacity, small internal resistance, variable shape, and flexible design. [0003] In the assembly process of the pouch battery, the pouch battery is mainly fixed on the aluminum plate by structural adhesive. At present, the commonly used structural adhesives for pouch batteries are two-component polyurethane structural adhesives, one-component silica gel, and two-component silica gel. One-component silica gel has the advantages of convenient coating and good adhesion, but the maximum curing depth of one-component silica gel is about 6mm. When applying glue on a large area, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/04C08G18/66C08G18/62C08G18/42C08G18/32C08F220/14C08F220/18C08F212/08C08F220/28C09K5/14
CPCC09J175/04C08G18/6644C08G18/4244C08G18/6229C08G18/3206C08G18/4063C08F220/14C09K5/14C08K2003/2227C08K2201/014C08L2201/02C08L9/00C08K13/02C08K5/103C08K5/5333C08K3/22C08K5/523C08F220/1804C08F220/1812C08F212/08C08F220/281C08F220/1802
Inventor 不公告发明人
Owner 广州布鲁奥申新材料科技有限公司
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