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Two-component polyurethane composite adhesive and preparation method thereof

A two-component polyurethane and composite adhesive technology, which is applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of low impact strength, high strength, and decreased peel strength, and achieve good adhesion. The effect of bonding strength

Active Publication Date: 2019-08-30
佛山市桐立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

[0003] The bonding of honeycomb panels is generally based on structural adhesives such as epoxy resin and polyurethane. However, due to the high strength and high brittleness of traditional epoxy resin adhesives, the adhesive layer is easily broken when peeled off, and the peeling strength is low. Epoxy resin glue has high cross-linking density, large shrinkage stress, and large difference in expansion coefficient between the glue and the metal sheet, so it is easy to degumming after testing under some severe conditions such as high and low temperature cycles, and the peeling strength is seriously reduced.
At the same time, due to the high crosslinking density and brittleness of epoxy resin, its impact strength is also low.

Method used

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  • Two-component polyurethane composite adhesive and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0025] A two-component polyurethane composite adhesive, including A component and B component;

[0026] The A component includes: 18 parts by mass of modified castor oil polyol, 12 parts by mass of castor oil polyol, 8 parts by mass of branched polyether / polyester polyol, 0.8 parts by mass of nano-reinforcement material, and 56 parts by mass of filler , 1 part by mass of water remover, 1.5 parts by mass of calcium oxide, 5 parts by mass of activated alumina powder, and 0.8 parts by mass of auxiliary agent;

[0027] The B component is 25 parts by mass of polymerized MDI. The average molecular weight of the modified castor oil polyol is 900-1000, the average functionality is 2.78-3.25, and the hydroxyl value range is 200-240 mg KOH / g. The preparation method of the modified castor oil polyol is as follows: take 1000 parts by mass of castor oil, 50 parts by mass of polyol, and 1 part by mass of the first catalyst, mix them, stir in a nitrogen environment, and slowly heat up to 18...

Embodiment 2

[0032] A two-component polyurethane composite adhesive, including A component and B component;

[0033]The component A includes: 15 parts by mass of modified castor oil polyol, 10 parts by mass of castor oil polyol, 5 parts by mass of branched polyether / polyester polyol, 0.5 parts by mass of nano-reinforcement material, and 55 parts by mass of filler , 0.5 parts by mass of water remover, 1 part by mass of calcium oxide, 4 parts by mass of activated alumina powder, 0.5 parts by mass of auxiliary agent;

[0034] The B component is 20 parts by mass of polymerized MDI. The average molecular weight of the modified castor oil polyol is 900-1000, the average functionality is 2.78-3.25, and the hydroxyl value range is 200-240 mg KOH / g. The preparation method of the modified castor oil polyol is as follows: take 1000 parts by mass of castor oil, 30 parts by mass of polyol, and 1 part by mass of the first catalyst, mix them, stir in a nitrogen environment, and slowly heat up to 180~220...

Embodiment 3

[0038] A two-component polyurethane composite adhesive, including A component and B component;

[0039] The component A includes: 20 parts by mass of modified castor oil polyol, 15 parts by mass of castor oil polyol, 10 parts by mass of branched polyether / polyester polyol, 1 part by mass of nano-reinforcement material, and 60 parts by mass of filler , 2 parts by mass of water remover, 2 parts by mass of calcium oxide, 6 parts by mass of activated alumina powder, and 1 part by mass of auxiliary agent;

[0040] The B component is 30 parts by mass of polymerized MDI. The average molecular weight of the modified castor oil polyol is 900-1000, the average functionality is 2.78-3.25, and the hydroxyl value range is 200-240 mg KOH / g. The preparation method of the modified castor oil polyol is as follows: take 1000 parts by mass of castor oil, 80 parts by mass of polyol, and 1 part by mass of the first catalyst, mix them, stir in a nitrogen environment, and slowly heat up to 180~220°...

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Abstract

The invention relates to the field of production of composite adhesives, and provides a two-component polyurethane composite adhesive and a preparation method thereof. The invention aims to improve the bonding effect of the composite adhesive. The two-component polyurethane composite adhesive comprises a component A and a component B, wherein the component A comprises, in parts by mass, 15-20 parts of modified castor oil polyol, 10-15 parts of castor oil polyol, 5-10 parts of branched polyether / polyester polyol, 0.5-1 part of a nano reinforcing material, 55-60 parts of a filler, 0.5-2 parts ofa water removing agent, 1-2 parts of calcium oxide, 4-6 parts of activated alumina powder and 0.5-1 part of an auxiliary agent; and the component B comprises 20-30 parts by mass of polymerized MDI. The polyurethane adhesive still maintains good bonding strength after high-temperature aging is performed.

Description

technical field [0001] The invention relates to the field of composite glue production, in particular to a two-component polyurethane composite glue and a preparation method thereof. Background technique [0002] Honeycomb panel is a multi-layer composite panel composed of metal panel, aluminum / paper honeycomb core, metal bottom plate, and polymer adhesive. It has many advantages such as light weight, high strength, high rigidity, sound insulation, and thermal insulation performance. . Aluminum honeycomb panel curtain wall has been widely used in the decoration of high-rise building exterior walls due to its light weight, high strength, high rigidity and many other advantages. The total thickness is 15mm, and the aluminum honeycomb panel with a thickness of 1.0mm is only 6Kg / ㎡. The weight of the honeycomb panel with the same rigidity is only 1 / 5 of the aluminum veneer and 1 / 10 of the steel plate. The interconnected aluminum honeycomb core is like countless I-beams. The cor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/14C09J11/04C09J11/06C08G18/66C08G18/42C08G18/48C08G18/36
CPCC09J175/14C09J11/04C09J11/06C08G18/6629C08G18/42C08G18/48C08G18/36C08K2003/2227C08K2003/2206C08K2003/265C08K3/22C08K3/36C08K3/26C08K5/13C08K5/524C08K13/02
Inventor 任碧野王世全欧阳伟
Owner 佛山市桐立新材料科技有限公司
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