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Flame-retardant two-component polyurethane adhesive for fixing electronic components and preparation method of adhesive

A technology of two-component polyurethane and electronic components, which is applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., to achieve flame retardancy, excellent bonding matching, and improve high and low temperature resistance.

Active Publication Date: 2021-12-10
HUBEI HUITIAN NEW MATERIALS STOCK CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional polyurethane glue cannot meet the above requirements

Method used

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  • Flame-retardant two-component polyurethane adhesive for fixing electronic components and preparation method of adhesive
  • Flame-retardant two-component polyurethane adhesive for fixing electronic components and preparation method of adhesive

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preparation example Construction

[0036] refer to figure 1 , the embodiment of the present application also provides a preparation method of the above-mentioned flame-retardant two-component polyurethane glue for fixing electronic components, including the following steps:

[0037] Preparation of component A: by mass percentage, weigh 10% to 20% of hydroxyl-terminated hydrogenated polybutadiene, 10% to 20% of hydroxyl-terminated polybutadiene at an ambient temperature of 5-25°C and a humidity of less than 50%. Butadiene-acrylonitrile (HTBN), 4%~8% bisphenol A polyether polyol, 2%~6% dipropylene glycol, 10%~20% phosphate plasticizer, 0.2%~0.4% light stabilizer , 0.1% to 0.3% of ultraviolet absorbers, 0.2% to 0.4% of antioxidants were added to the mixer and dispersed for 10 minutes, and then 3% to 6% of 3A molecular sieve activation powder and 35% to 45% of pre-dried aluminum hydroxide powder were added. Disperse for 15 minutes under the condition of vacuum degree lower than -0.095MPa, add 0.1%~0.2% catalyst af...

Embodiment 1

[0055] Embodiment 1 of the present application provides a method for preparing a flame-retardant two-component polyurethane glue for fixing electronic components, comprising the following steps:

[0056] Preparation of component A: In parts by mass, weigh 14 parts of hydroxyl-terminated hydrogenated polybutadiene and 14 parts of hydroxyl-terminated polybutadiene-acrylonitrile at an ambient temperature of 5-25°C and a humidity of less than 50%. , 6 parts of bisphenol A polyether polyol, 5 parts of dipropylene glycol, 15 parts of IPPP plasticizer, 0.3 parts of light stabilizer tinuvin 292, 0.3 parts of ultraviolet absorber tinuvin 571, 0.2 parts of antioxidant Irganox 1135 were added to the mixer to disperse After 10 minutes, add 41.5 parts of aluminum hydroxide powder and 3.5 parts of 3A molecular sieve activated powder, and disperse for 15 minutes under the condition that the vacuum degree is lower than -0.095MPa. Disperse at high temperature for 10 minutes, discharge the mate...

Embodiment 2

[0060] Embodiment 2 of the present application provides a method for preparing a flame-retardant two-component polyurethane glue for fixing electronic components, comprising the following steps:

[0061] Preparation of component A: in parts by mass, weigh 10 parts of hydroxyl-terminated hydrogenated polybutadiene and 18 parts of hydroxyl-terminated polybutadiene-acrylonitrile at an ambient temperature of 5-25°C and a humidity of less than 50%. , 6 parts of bisphenol A polyether polyol, 5 parts of dipropylene glycol, 15 parts of IPPP plasticizer, 0.3 parts of light stabilizer tinuvin 292, 0.3 parts of ultraviolet absorber tinuvin 571, 0.2 parts of antioxidant Irganox 1135 were added to the mixer to disperse After 10 minutes, add 41.5 parts of aluminum hydroxide powder and 3.5 parts of 3A molecular sieve activated powder, and disperse for 15 minutes under the condition that the vacuum degree is lower than -0.095MPa. Disperse at high temperature for 10 minutes, discharge the mate...

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Abstract

The invention relates to the field of two-component polyurethane adhesives, in particular to a flame-retardant two-component polyurethane adhesive for fixing electronic components and a preparation method of the flame-retardant two-component polyurethane adhesive. The two-component polyurethane adhesive provided by the invention comprises a component A and a component B. The component A comprises the following components in percentage by mass: 10%-20% of hydroxyl-terminated hydrogenated polybutadiene, 10%-20% of hydroxyl-terminated polybutadiene-acrylonitrile, 4%-8% of bisphenol A polyether polyol, 2%-6% of dipropylene glycol, 10%-20% of a phosphate plasticizer, 0.2%-0.4% of a light stabilizer, 0.1%-0.3% of an ultraviolet light absorber, 0.2%-0.4% of an antioxidant, 35%-45% of aluminum hydroxide, 3%-6% of 3A molecular sieve activation powder and 0.1%-0.2% of a catalyst. The component B comprises the following components in percentage by weight: 30%-45% of an isocyanate-terminated polyurethane prepolymer, 10%-15% of polyphenyl polymethylene polyisocyanate, 10%-15% of a phosphate plasticizer, 0.3%-0.6% of a silane coupling agent and 30%-45% of aluminum hydroxide.

Description

technical field [0001] The application relates to the field of two-component polyurethane adhesive, in particular to a flame-retardant two-component polyurethane adhesive for fixing electronic components and a preparation method thereof. Background technique [0002] At present, most of the electronic components are fixed with the traditional single-component silicone sealant, and the components and the printed circuit board (PCB) surface are fixed by moisture curing, which plays a role in shock absorption and reinforcement, and reduces the damage caused by vibration and drop. Component solder joint failure. With the rapid development of new energy vehicles, more and more electronic circuit boards are used for vehicle PCBs and power battery PCBs, and the requirements for the anti-seismic strength of components are higher. The strength and shock absorption effect of traditional silicone sealants cannot It meets the requirements, and at the same time, the service life of the ...

Claims

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Application Information

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IPC IPC(8): C09J175/14C09J11/04C09J11/06C08G18/76C08G18/78C08G18/69C08G18/66C08G18/62C08G18/48C08G18/32
CPCC09J175/14C09J11/04C09J11/06C08G18/7664C08G18/7843C08G18/725C08G18/698C08G18/6674C08G18/4879C08G18/6208C08G18/3206C08K2003/2227C08K13/04C08K5/3435C08K5/1345C08K7/26C08K3/22C08K5/523Y02E10/50
Inventor 唐礼道和平赵景左赵祖培张虎极韩胜利王玲赵勇刚冷金洲章锋
Owner HUBEI HUITIAN NEW MATERIALS STOCK CO LTD