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Double-component solvent-free polyurethane structural adhesive coated at normal temperature, as well as preparation method and application method thereof

A solvent-free polyurethane, two-component technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problem of low strength, application limitations of two-component polyurethane adhesives, and large gaps in bonding strength and other issues to achieve the effect of good safety, environmental friendliness and easy operation

Active Publication Date: 2015-03-25
康达新材料(集团)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still a big gap between the two-component polyurethane adhesive and structural adhesives such as epoxy resin and second-generation acrylate in terms of bonding strength.
There are few domestic literatures on high-strength two-component polyurethane adhesives, and the strength is not high
Therefore, the application of two-component polyurethane adhesives in structural bonding has been greatly limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1A-1

[0043] Synthesis of Example 1A-1

[0044] The molecular weight of 10 parts is the vegetable oil modified polyol (castor oil modified trihydric alcohol) of 900, the molecular weight of 10 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, drop the temperature below 60°C and add 110 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 2A-2

[0045] Synthesis of Example 2A-2

[0046] 10 parts of vegetable oil-modified polyols (castor oil-modified trihydric alcohols) with a molecular weight of 900 and 10 parts of polyether polyols with a molecular weight of 350 are packed into a reaction vessel and heated to 120°C for vacuum dehydration After 2 hours, cool down to below 60°C and add 110 parts of PAPI (polymethylene polyisocyanate), heat up to 80°C and react for 2 hours. The prepolymer is used as component A of the two-component solvent-free polyurethane structural adhesive. Hereinafter referred to as A-2.

Embodiment 3B-1

[0047] Synthesis of Example 3B-1

[0048] 100 parts of a vegetable oil-modified polyol (castor oil-modified triol) with a molecular weight of 900, 10 parts of a polyether polyol with a molecular weight of 350, and 10 parts of an aromatic-based polyester polyol with a molecular weight of 300 Alcohol, put it into a reaction container, heat to 120°C for vacuum dehydration for 2 hours, cool down to below 60°C, add 20 parts of MDI, heat up to 80°C for 2 hours, then add 1 part of fumed silica, 20 parts of talc powder , 80 parts of heavy calcium carbonate, heated to 120°C for vacuum dehydration for 2 hours, cooled to below 40°C, added 2 parts of siloxane coupling agent, 0.1 part of curing regulator (dibutyltin dilaurate), heated Stir at 50°C for 0.5h, then cool down and discharge as component B of the two-component solvent-free polyurethane structural adhesive. Hereinafter referred to as B-1.

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Abstract

The invention provides a double-component solvent-free polyurethane structural adhesive coated at normal temperature, as well as a preparation method and an application method thereof. The double-component solvent-free polyurethane structural adhesive comprises a component A and a component B, wherein the component A contains aromatic and / or aliphatic and / or alicyclic diisocyanate, polyester polyol and / or polyether polyol and / or plant oil modified polyol with two or more functionality degrees, and / or polyol of which the carbon chain length is smaller than C12; the component B contains at least one polyol a of which the carbon chain length is smaller than C12, polyol b with at least two or more functionality degrees, plant oil modified polyol c, aromatic and / or aliphatic and / or alicyclic diisocyanate d, a solid powder filler e, a siloxane coupling agent f and a curing speed regulating agent g. The double-component solvent-free polyurethane structural adhesive is applicable to adhesion of metals, woods, plastics and hard foam materials. The double-component solvent-free polyurethane structural adhesive has the advantages of being simple to operate, convenient to use, good in safety, free of solvent, friendly to environment, excellent in adhesive property and stripping resistance and relatively good in thermal impact resistance.

Description

technical field [0001] The invention belongs to the technical field of two-component polyurethane structural adhesives, and in particular relates to a two-component solvent-free polyurethane structural adhesive coated at room temperature and a preparation method and application method thereof. It can be mechanically mixed and glued automatically or manually mixed and glued according to the weighing ratio of 1:4. It is easy to operate and has high strength after curing. It is used for structural bonding between metal and non-metal. Background technique [0002] Two-component polyurethane adhesives are widely used in food packaging, paper-plastic composite, civil construction, structural bonding, ultra-low temperature bonding, etc. Plastic, glass steel, polyurethane, etc. have been widely used as structural materials in the automobile manufacturing industry. Two-component polyurethane Adhesive has become the preferred adhesive for its excellent impact resistance, durability, l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J175/06C09J11/04C09J11/06C08G18/42C08G18/36C08G18/48
Inventor 徐骏赵有中姚其胜陈云传卫艳玲
Owner 康达新材料(集团)股份有限公司
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