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Single-component moisture-curing polyurethane adhesive and preparation method thereof

A polyurethane adhesive, moisture curing technology, applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., to meet the requirements of bonding strength and high performance, and improve the effect of average functionality

Active Publication Date: 2015-01-07
周建明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the above-mentioned new varieties of one-component moisture-curing polyurethane adhesives have been improved in some specific fields of application, new varieties still need to be further developed in the general bonding of multiple materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] In the reaction kettle, add 100 grams of polyoxide glycol (molecular weight) and 50 grams of acetate ethyl acetate, add 20.4 grams of mdi (molecular weight 250), react at room temperature for 1 hour, and then heat up at room temperature for 1 hour.By 85 ° C, the reaction is 5 hours (generated-OH pre-polymer, its OH / NCO Moore ratio is 1.225), cooling to 60 ° C;

[0055] Add 120 grams of PAPI (PM-200) under the stir, react at the room temperature for 1 hour, and then warmed to 85 ° C, react for 3 hours, measure the percentage of NCO in the reaction product.℃;

[0056] Add 9.3 grams of trimethexytaline propylene and 13.3 grams of acetate ethyl acetate under stirring. The reaction of the room temperature is 3 hours, then the temperature is heated to 85 ° C, and the response is 2 hours.After the percentage content is constant, the cooling to less than 60 ° C;

[0057] Add 20 grams of ethyl acetate according to the requirements of the product solid content and stir well. The ingr...

Embodiment 2

[0059] In the reaction kettle, add 100 grams of polybhenic acid-hexyl-glycol (molecular weight 2000) and 100 grams of acetate, stir well, and then add it.10 grams of 10 grams, the reaction at room temperature for 1 hour, and then heating to 90 ° C, the reaction 4.5 hours (generated end -oh pre-cluster, its OH / NCO Murbi is 1.252), cooling to 60 ° C;

[0060] Add 120 grams of PAPI (PM-200) under the stir, react at the room temperature for 1 hour, then heating to 85 ° C, and the reaction 2.5 hours.℃;

[0061] Add a mixture of 9.7 grams of trimethexytaline and 10 grams of acetate ethyl acetate under stirring. The reaction of the room temperature is 2.5 hours, the temperature is heated to 85 ° C, and the response is 2.5 hours.After the percentage content is constant, the cooling to less than 60 ° C;

[0062] Add 19 grams of acetate according to the requirements of the product solid content and stir well. The ingredients are 368 grams of solid content of 65%viscosity to 3000MPA.S (25 ° ...

Embodiment 3

[0064] In the reactor, add 100 grams of polyoxide-oxide-oxidine diol (800) and 80 grams of acetate, stir well, and add 27.2 grams of MDI for 1 hour at room temperature before the room temperature is increased to 1 hour.80 ° C, 4 hours of reaction (generate-OH / NCO Moore ratio is 1.15), cooling to 60 ° C;

[0065] Add 120 grams of PAPI (PM-100) under the stir, react at the room temperature for 1 hour, and then heated to 80 ° C, and the response is 3.5 hours.℃;

[0066] Add 9.3 grams of trimethexytaline propylene and 18 grams of acetate ethyl acetate under stirring. The reaction of room temperature is 2 hours, then heated to 80 ° C, and the response is 3 hours.After the percentage content is constant, the cooling to less than 60 ° C;

[0067] According to the product solid content requirements, 20 grams of ethyl acetate and 20 grams of cycles are added, stirred evenly, and the ingredients are 394.5 grams of solid content of 65%viscosity to 2200MPA.S (25 ° C).

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Abstract

The invention discloses a single-component moisture-curing polyurethane adhesive and a preparation method thereof. The preparation method of the adhesive is characterized by comprising the following step: by adopting an organic solvent as a solvent, performing reaction on polyether glycol and / or polyester glycol, diphenyl methane diisocyanate, polymethylene polyphenyl isocyanate and triatomic primary alcohol of which the molecular weight is less than 200 to prepare the adhesive. The average degree of functionality of an obtained high-functionality NCO-terminated prepolymer is more than or equal to 3, and the single-component moisture-curing polyurethane adhesive disclosed by the invention is suitable for splicing and tenoning (or assembling) of woods and bonding and compounding of stone materials, fireproof plates, plastic aluminum plates, bakelite plates, oak boards, some metals such as aluminum and iron, zinc-plating plates, PVC membranes and the like, is especially suitable for adhesion of rosewoods and red woods, and can meet the special requirements of some products.

Description

Technical field [0001] The present invention involves a single group of wet -solidified polyurethane adhesives and its preparation methods. Background technique [0002] In recent years, the application of polyurethane adhesives in different types of materials has been developed rapidly, with many varieties, and excellent performance is its significant feature.The wet -solid polyurethane glue adhesive in a single group has a simple packaging and convenient advantage to use it.However, the existing single groups on the market The wet -cured polyurethane adhesive in some wood, the adhesion and composite of the metal plate and the PCV film, the bonding and composite of the plastic aluminum plate, etc.Poor adhesion and low adhesion intensity, which requires the development of a new type of single -group wet -cured polyurethane adhesive to solve the need for the lack of existing varieties. [0003] In recent years, some new types of wet -cured polyurethane adhesives have also appeared...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J175/06C08G18/76C08G18/66C08G18/48C08G18/42C08G18/32C08G18/10
Inventor 李本林邓兵周建明何绍群刘素珍刘加胜
Owner 周建明
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