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Nano silicon micronization modified double components, solventless polyurethane adhesive and preparation method thereof

A technology of solvent-free polyurethane and nano-silica powder, which is applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problem of reducing bonding strength, limiting the application of two-component polyurethane adhesives, and poor water resistance and heat resistance. And other issues

Inactive Publication Date: 2007-09-19
HUNAN SHENLI IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, two-component polyurethane adhesives have low bonding strength, poor water resistance and heat resistance, and are easily hydrolyzed under high temperature and high humidity to reduce the bonding strength. The service life of the material limits the application of two-component polyurethane adhesives to a large extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Nano silica powder modified two-component, solvent-free polyurethane adhesive is composed of A component and B component.

[0036] Synthesis of component A:

[0037] Add 75g polytetrahydrofuran diol (molecular weight 1800) and 9g tetrahydroxy polyether polyol (molecular weight 900) into the reaction kettle, start the stirrer, heat up to 100°C, turn on the vacuum pump to evacuate, the vacuum degree is 0.096MPa, and the temperature in the kettle is 110°C, dehydration for 2 hours, cool down with cooling water, when the temperature drops to 50°C, add 78g of toluene diisocyanate to start the reaction, the temperature is 75°C, react for 3 hours, add dropwise 5.6g of pre-melted trimethylolpropane, The temperature is 77°C, dripping is completed in 1.5 hours, continue to react for 2 hours, cool down with cooling water, when the temperature drops to 50°C, add 4.5g of carbodiimide, stir for 1 hour, and discharge to obtain component A.

[0038] Synthesis of component B:

[0039] ...

Embodiment 2

[0042] Nano silica powder modified two-component, solvent-free polyurethane adhesive is composed of A component and B component.

[0043] Synthesis of component A:

[0044] Add 60g polytetrahydrofuran diol (molecular weight 1000g) and 7.5g tetrahydroxy polyether polyol (molecular weight 600g) into the reaction kettle, start the stirrer, heat up to 100°C, turn on the vacuum pump to vacuum, the vacuum degree is 0.092MPa, the temperature in the kettle Dehydrate at 110°C for 3 hours, pass cooling water to cool down, when the temperature drops to 50°C, add 60g of toluene diisocyanate to start the reaction, the temperature is 72°C, react for 4 hours, add dropwise 5.1g of pre-melted trimethylolpropane , the temperature is 75°C, the dripping is completed in 2 hours, the reaction is continued for 1.5 hours, the temperature is lowered by cooling water, when the temperature drops to 50°C, 4g of silicone coupling agent is added, and stirred for 1 hour.

[0045] Synthesis of component B: ...

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PUM

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Abstract

The invention relates to a nano silicon micro-powder modified double-component and solvent-free polyurethane adhesive and preparing method thereof. The adhesive is constituted of component A and component B, wherein the component A is constituted of toluene diisocyanate, polyhydric polyether and trimethylolpropane, and the component B is constituted of liquid amino resin, dibutylphthalate, fire retardant and nano silicon micro-powder. The prepared adhesive possesses character of high strength, and moisture and heat proof; and is mainly used for bonding soft materials, or hard materials such as metal, plastic, and glass with the soft materials, and occasion of high demanding strength and moisture and heat proof.

Description

Technical field: [0001] The invention relates to a two-component, solvent-free polyurethane adhesive modified by nano silicon micropowder, in particular to an adhesive with high strength and good resistance to heat and humidity. Background technique: [0002] Two-component polyurethane adhesive is the most used and widely used product among polyurethane adhesives. It is mainly used for bonding soft materials or hard materials such as metal, plastic, glass, etc., and is widely used in ships, machinery, automobiles, instruments, etc. Instrumentation and other industries. Generally, two-component polyurethane adhesives have low bonding strength, poor water resistance and heat resistance, and are easily hydrolyzed under high temperature and high humidity to reduce the bonding strength. The service life of materials limits the application of two-component polyurethane adhesives to a large extent. Invention content: [0003] The purpose of the present invention is to overcome ...

Claims

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Application Information

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IPC IPC(8): C09J175/04C09J161/24C09J11/04C09J171/00
Inventor 袁宏伟李冬月朱宝根郭双喜
Owner HUNAN SHENLI IND
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