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Single-ingredient polyurethane adhesive for automobile as well as production process and application thereof

A technology of polyurethane adhesive and production process, which is applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc. It can solve the problems of fast curing and low curing temperature, and achieve stable product quality, small environmental impact, The effect of good rigidity

Inactive Publication Date: 2018-10-09
吉林省盛达实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The feature of this invention is that the adhesive includes solvent-free, normal temperature curing or thermal curing, the curing temperature is in the range of 0-100 ° C, and the curing time is 1 hour; however, although the polyurethane adhesive of this invention can be cured by heating, the curing temperature is low and cannot be cured quickly.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A method for preparing a single-component polyurethane adhesive for automobiles, the steps are as follows: add 100 kg of polyether polyol with a molecular weight of 2000 into a closed thermostatic reactor, slowly add 0.5 kg of silane in proportion, control the temperature, stir for 20 minutes, and fully stir Heat up to 40°C at low temperature, add 1kg of dibutyltin dilaurate and 0.5kg of phosphoric acid, stir for 20min under vacuum, heat up to the specified reaction temperature, add 370kg of modified isocyanate and 30kg of polyisocyanate in batches according to the ratio of ingredients in the formula , constant temperature reaction at 80°C, reaction time 2.5h, after the reaction was completed, the temperature was lowered to 40°C to obtain a finished polyurethane adhesive.

Embodiment 2

[0052] A method for preparing a one-component polyurethane adhesive for automobiles, the steps are as follows: add 100kg of polyether polyol with a molecular weight of 1000 to a closed thermostatic reactor, slowly add 0.5kg of silane in proportion, control the temperature, and raise the temperature to 40°C under sufficient stirring conditions , add 1 kg of dibutyltin dilaurate and 0.5 kg of phosphoric acid, vacuumize, stir for 20 minutes, heat up to the specified reaction temperature, add 370 kg of modified isocyanate and 30 kg of polyisocyanate in batches according to the proportion of the ingredients in the formula, and react at a constant temperature of 80 ° C. The reaction time is 2.5 hours, and after the reaction is completed, the temperature is lowered to 40° C. to obtain the finished polyurethane adhesive.

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PUM

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Abstract

The invention discloses a single-ingredient polyurethane adhesive for an automobile. The single-ingredient polyurethane adhesive is prepared by the following steps of obtaining prepolymers through reaction on the single-ingredient polyurethane adhesive through modified isocyanate, polyisocyanate and polyalcohol under the catalysis condition, and then controlling the prepolymers through catalysts and polymerization inhibitors, wherein the mass ratio of polyalcohol to the modified isocyanate to polyisocyanate is 1:(3.5 to 4.5):(0.2 to 0.4). The invention also discloses a production process and apurpose of the single-ingredient polyurethane adhesive for the automobile.

Description

technical field [0001] The invention relates to the technical field of polyurethane adhesives, in particular to a one-component polyurethane adhesive for automobiles and its production process and application. Background technique [0002] Polyurethane glue refers to a type of adhesive with high polarity and reactivity that contains carbamate groups or isocyanate groups in its molecules. Polyurethane adhesives have the characteristics of diversity. Polyurethane and isocyanate can be used in adhesive systems in a variety of ways. Polyurethane adhesives are very easy to react with active hydrogen in materials. Polyurethane adhesives are required and are especially suitable where other types of adhesives cannot or are difficult to bond. In addition, polyurethane adhesives also have the characteristics of adjustable toughness, simple process, excellent mechanical properties and good low temperature resistance. , so that its application field continues to expand. [0003] Adhe...

Claims

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Application Information

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IPC IPC(8): C09J175/08C08G18/48
CPCC08G18/48C09J175/08
Inventor 褚衍顺刘晓秋
Owner 吉林省盛达实业有限公司
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