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Single-component solvent-free damp solidifying polyurethane adhesion agent and method of producing the same

A polyurethane adhesive, moisture-curing technology, used in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of slow curing speed, low bonding strength, storage stability, etc. The effect of fast speed, high bonding strength and good storage stability

Inactive Publication Date: 2008-12-10
SHANGHAI JINGXI STATIONERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the one-component polyurethane adhesive also brings some problems, such as poor initial adhesion, slow curing speed, and low bonding strength. Although it can be improved by adding some organic metal and ammonia catalysts, the storage stability is greatly improved. decline, which has affected the application of one-component polyurethane adhesives to some extent
Many formulations of one-component polyurethane adhesives contain toxic solvents such as toluene, which cannot meet the environmental protection and non-toxic requirements of some products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add 30 parts of polyester polyol (-OH%, hydroxyl value 225) and 30 parts of polyether polyol (model N-210) to the reaction kettle, vacuum dehydrate at 120°C for 2 hours, add 34 parts of TDI (model 80 / 20), Raise the temperature to 85°C-95°C, stir and react for 4 hours, cool down to 50°C, add 0.1 part of catalyst, 0.5 part of silane coupling agent (model KH550), stir for 0.5 hour, and discharge after passing the test.

[0015] The -NCO% of the product is 8-10%. The initial curing speed of the product is 16 hours and the final curing time is 48 hours under the condition of room temperature 20 ℃ and humidity 50%. The bonding strength between aluminum and aluminum is > 25 kg / The storage stability of the product is greater than 12 months.

Embodiment 2

[0017] Add 30 parts of polyester polyol (-OH%, hydroxyl value 225) and 30 parts of polyether polyol (model N-210) to the reaction kettle, vacuum dehydrate at 120°C for 2 hours, add 34 parts of TDI (model 80 / 20), Raise the temperature to 85°C-95°C, stir and react for 4 hours, cool down to 50°C, add 0.5 part of catalyst, 1.0 part of silane coupling agent (model KH550), stir for 0.5 hour, test, and discharge as qualified.

[0018] The -NCO% of the product is 8-10%. The initial curing speed of the product is 3-4 hours under the condition of room temperature 20 ℃ and humidity 50%. The final curing time is 24 hours. The bonding strength between aluminum and aluminum is >25 kg / cm2, the storage stability of the product is greater than 6 months.

Embodiment 3

[0020] Add 40 parts of polyether polyol (model N-330) and 30 parts of polyether polyol (model N-210) to the reaction kettle, vacuum dehydrate at 120°C for 2 hours, add 20 parts of liquefied MDI, TDI (model 80 / 20) 22 part, heated to 85°C-95°C, stirred for 2 hours, added 2 parts of BDO, continued to react for 2 hours, cooled to 50°C, added 0.2 part of catalyst, 0.8 part of silane coupling agent (model KH550), stirred for 0.5 hour, detected , qualified discharge.

[0021] The -NCO% of the product is 9-11%. The initial curing speed of the product is 6 hours and the final curing time is 36 hours under the condition of room temperature 20 ℃ and humidity 50%. The bonding strength between aluminum and aluminum is > 25 kg / square centimeters, the storage stability of the product is greater than 9 months

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PUM

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Abstract

The invention discloses a monocomponent solvent-free moisture-curing polyurethane adhesive, which comprises polyatomic alcohol, diisocyanate, catalyst, a coupling agent and a chain extender. The compositions in percentage by weight of the polyurethane adhesive are: 40 to 70 percent of polyatomic alcohol, 30 to 55 percent of diisocyanate, 0 to 5 percent of chain extender, 0.1 to 0.5 percent of catalyst and 0 to 1 percent of coupling agent. The monocomponent solvent-free moisture-curing polyurethane adhesive does not have a solvent and does not contain toxic solvents such as toluene, thereby according with the requirements of nontoxicity for environmental protection; moreover, cured by moisture in the air and in a material, the polyurethane adhesive has excellent storage stability and characteristics including quick curing speed and high adhesion strength, etc.

Description

Technical field [0001] The invention relates to a single-component solvent-free moisture fast-curing polyurethane adhesive formula and a manufacturing method thereof. Background technique [0002] Due to the highly polar and chemically active urethane group (-NHCOO-) and / or isocyanate group (-NCO) in polyurethane adhesives, it is compatible with materials containing active hydrogen, such as foam plastics, wood, leather, fabrics, paper, etc. Porous materials such as ceramics and ceramics and materials with smooth surfaces such as metals, glass, rubber, and plastics have excellent chemical adhesion. The one-component polyurethane adhesive can save the trouble of measuring and compounding the two-component polyurethane adhesive, and it is ready to use and has good operability. However, the one-component polyurethane adhesive also brings some problems, such as poor initial adhesion, slow curing speed, and low bonding strength. Although it can be improved by adding some organic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04
Inventor 赵卫国唐骏豪
Owner SHANGHAI JINGXI STATIONERY
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