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Environmentally-friendly fast-curing solvent-free polyurethane structural sealing adhesive as well as preparation method and application method thereof

A solvent-free polyurethane and environmentally friendly technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of low bonding strength and slow curing speed, achieve fast curing speed and improve production High efficiency and high bond strength

Inactive Publication Date: 2018-07-03
上海康达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

However, compared with other types of structural adhesives, two-component polyurethane adhesives usually have disadvantages such as slow curing speed and relatively low bonding strength, which limits their application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The synthesis of embodiment 1 A-1

[0046] The molecular weight of 40 parts is the vegetable oil modified polyol (trihydric alcohol of castor oil modification) of 900, the molecular weight of 40 parts is the polyester polyol based on phthalic acid of 2000, pack in the reaction vessel, heat Vacuum dehydration at 120°C for 2 hours, lower the temperature to below 60°C, add 100 parts of PAPI (polymethylene polyisocyanate), heat up to 80°C and react for 2 hours. The prepolymer is used as the first component of the two-component solvent-free polyurethane structural adhesive . Hereinafter referred to as A-1.

Embodiment 2

[0047] The synthesis of embodiment 2 A-2

[0048] The molecular weight of 30 parts is the vegetable oil modified polyol (castor oil modified trihydric alcohol) of 900, the molecular weight of 10 parts is the polyether polyol of 350, the hydroxyethyl methacrylate of 20 parts is loaded into reaction In the container, heat to 120°C for vacuum dehydration for 2 hours, cool down to below 60°C, add 100 parts of PAPI (polymethylene polyisocyanate), heat up to 80°C and react for 2 hours, add 40 parts of calcium carbonate for vacuum degassing for 2 hours, cool down The material is discharged to obtain the first component of the two-component solvent-free polyurethane structural adhesive. Hereinafter referred to as A-2.

Embodiment 3

[0049] The synthesis of embodiment 3 B-1

[0050] 100 parts of polyoxypropylene diol with a molecular weight of 2000, 10 parts of polyoxypropylene triol with a molecular weight of 350, and 10 parts of an aromatic-based polyester polyol with a molecular weight of 1000 are charged into a reaction vessel and heated Vacuum dehydration at 120°C for 2 hours, cool down to below 60°C and add 20 parts of MDI, heat up to 80°C for 2 hours, then add 1 part of fumed silica, 20 parts of talc, 80 parts of heavy calcium carbonate, heat Vacuum dehydration at 120°C for 2 hours, cool down to below 40°C, add 2 parts of siloxane coupling agent, 0.1 part of curing regulator (dibutyltin dilaurate), heat to 50°C and stir for 0.5h, then cool down The material is used as the second component of the two-component solvent-free polyurethane structural adhesive. Hereinafter referred to as B-1.

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Abstract

The invention provides an environmentally-friendly fast-curing solvent-free polyurethane adhesive and a preparation method thereof. The adhesive comprises an A component and a B component, wherein theA component contains an aromatic and / or aliphatic and / or alicyclic diisocyanate, a polyester polyol and / or polyether polyol with two functionalities or more and / or a vegetable oil modified polyol and / or a polyol with a carbon chain length of C12 or less, hydroxy acrylic resin and a solid powder filler, and the B component contains at least one polyol a with a carbon chain length of C12 or less, apolyether polyol and / or polyester polyol with two functionalities or more and / or a vegetable oil-modified polyol b, aromatic and / or aliphatic and / or alicyclic diisocyanate c, a solid powder filler d,a silicone coupling agent e, and a curing speed modifier f. The adhesive provided by the invention has the advantages of fast curing, simple operation, good safety, no solvent, and friendliness to the environment; the adhesive has excellent adhesion and peeling resistance; and the adhesive has better thermal shock resistance.

Description

technical field [0001] The invention belongs to the field of two-component polyurethane adhesives, in particular to a fast-curing, high-thermal-conductivity polyurethane structural sealant and a preparation method and an application method thereof. Background technique [0002] Two-component polyurethane adhesives are widely used in various fields of people's production and life. Two-component polyurethane adhesives have become the first choice in many fields due to their excellent impact resistance, durability, low temperature resistance, fatigue resistance and good construction performance. adhesive. However, compared with other types of structural adhesives, two-component polyurethane adhesives usually have disadvantages such as slow curing speed and relatively low bonding strength, which limit their application. Contents of the invention [0003] The purpose of the present invention is to provide an environment-friendly solvent-free polyurethane adhesive with rapid cu...

Claims

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Application Information

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IPC IPC(8): C09J175/14C09J11/04C08G18/42C08G18/48C08G18/67C08G18/76C08G18/79
CPCC09J175/14C08G18/36C08G18/4018C08G18/4812C08G18/4825C08G18/4829C08G18/672C08G18/7671C08G18/794C08K3/34C08K3/36C08K2003/265C09J11/04C08G18/48C08G18/42
Inventor 赵有中卫艳玲姚其胜龙恩帅
Owner 上海康达新材料科技有限公司
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