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Bicomponent polyurethane adhesive and preparation method thereof

A two-component polyurethane and adhesive technology, applied in the field of materials, can solve the problems of short operation time, long post-curing time, and high curing temperature of two-component adhesives, and achieve easy promotion, low curing temperature, and operating time. long effect

Active Publication Date: 2016-01-13
廊坊市北辰创业树脂材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of short operating time in the early stage, long curing time in the later stage, high curing temperature and high cost of the two-component adhesive, the present invention hopes to provide a new two-component adhesive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In this example, the two-component polyurethane adhesive consists of A component and B component:

[0030] The raw material composition and mass percentage of A component are: 25% castor oil, 15% polyether polyol 4110, 30% superfine calcium carbonate (1000 mesh), 18% calcined kaolin (600 mesh), 11.75 % dichloroethane, 0.25% organic amine catalyst.

[0031] 4,4'-Diphenylmethane diisocyanate (MDI) with 31% NCO content of component B

[0032] The preparation method of above-mentioned two-component polyurethane adhesive comprises the steps:

[0033] (1) Accurately weigh the raw materials of component A according to the above weight percentage, then add polyether polyol 4110, castor oil, methylene chloride, and catalyst into the stirring tank and stir evenly, then continue to add ultrafine calcium carbonate 1. Add calcined kaolin into the stirring tank and stir evenly.

[0034] (2) Based on the total weight of all raw materials in component A, weigh 25% of the total weigh...

Embodiment 2

[0037] In this embodiment, the two-component polyurethane adhesive is still composed of A component and B component.

[0038] The raw material composition and mass percentage of A component are: 25% castor oil, 15% polyether polyol 4110, 30% silicon dioxide (1250 mesh), 18% calcined kaolin (600 mesh), 11.75% Dichloroethane, 0.25% organic amine catalyst.

[0039] Component B consists of 4,4'-diphenylmethane diisocyanate (MDI) with an NCO content of 31%.

[0040] The preparation method of the two-component polyurethane adhesive of the present embodiment comprises the steps:

[0041] (1) Accurately weigh the raw materials of A component according to the above weight percentage, then add polyether polyol 4110, castor oil, methylene chloride, and catalyst into the stirring tank and stir evenly, then continue to add silicon dioxide, Calcined kaolin is added into the stirring tank and stirred evenly to obtain component A.

[0042] (2) Based on the total weight of all raw materials...

Embodiment 3

[0045] In this embodiment, the two-component polyurethane adhesive is still composed of A component and B component.

[0046] The raw material composition and mass percentage of component A are: 28% castor oil, 32% polyether polyol 4110, 35% silicon dioxide (1250 mesh), 4.75% dichloroethane, 0.3% organic amine kind of catalyst.

[0047] Component B consists of 4,4'-diphenylmethane diisocyanate (MDI) with an NCO content of 31%.

[0048] The preparation method of the two-component polyurethane adhesive of the present embodiment comprises the steps:

[0049] (1) Accurately weigh the raw materials of A component according to the above weight percentage, then add polyether polyol 4110, castor oil, dichloromethane, and catalyst into the stirring tank and stir evenly, continue to add silicon dioxide and stir Evenly.

[0050] (2) Based on the total weight of all raw materials in component A, weigh 50% of the total weight of component A in 4,4'-diphenylmethane diisocyanate as compon...

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PUM

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Abstract

The invention provides a bicomponent polyurethane adhesive and a preparation method thereof. The bicomponent polyurethane adhesive comprises a first component and a second component, wherein the first component comprises castor oil, polyether polyol, calcium carbonate or silicon dioxide and dichlorethane, and the second component comprises 4,4'-diphenyl methane diisocyanate (MDI). The bicomponent polyurethane adhesive provided by the invention is long in early-stage operating time in use, but the time needed by later-stage curing is shorter than that of an existing polyurethane adhesive, and the curing temperature is low. Moreover, raw materials adopted by the bicomponent polyurethane adhesive provided by the invention are low in cost, so that the cost of the bicomponent polyurethane adhesive provided by the invention is lower than that of an existing common product, and the bicomponent polyurethane adhesive is easier for popularization and application.

Description

technical field [0001] The invention relates to the field of materials, in particular to a two-component polyurethane adhesive. Background technique [0002] Two-component polyurethane adhesive is the most important category of polyurethane, with a wide range of uses and a large amount. It is divided into two components, A and B. Usually, component A is a component containing hydroxyl groups, and component B is a component containing free isocyanate groups. It can be prepared according to the ratio before use. After the two-component raw materials are mixed, they react, undergo chain extension, cross-linking, and quickly form a strong adhesive layer. Usually, they can be cured at room temperature. By adding appropriate catalysts or heating, the reaction speed can be accelerated. Shorten curing time. [0003] In order to speed up the curing, the existing formula adds more organotin catalysts, but it will cause short operation time in the early stage, and the adhesive layer ...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J11/04C08G18/48C08G18/36
Inventor 张子印焦淑瑞
Owner 廊坊市北辰创业树脂材料股份有限公司