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One-component polyurethane adhesive from epoxy resin modification and preparation method thereof

A technology of polyurethane adhesives and epoxy resins, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of affecting the bonding performance and troublesome users, and achieve simple use and high bonding strength High, good toughness effect

Inactive Publication Date: 2009-02-04
HUNAN SHENLI IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, most epoxy resin modified polyurethane adhesives were two-component, which must be cured by a curing agent. Connectivity, causing trouble and inconvenience to users

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 40g polyether diol (molecular weight 1000) and 60g polyether triol (molecular weight 1000) into the reaction kettle, start the agitator, turn on the electric heating switch to raise the temperature, when the temperature rises to 100°C, turn on the vacuum pump to evacuate, and the vacuum degree 0.095MPa, the temperature in the kettle is 112°C, dehydration for 2 hours, add 1.2g of tarodiamine and 40g of epoxy resin (E-51), the temperature is 118°C, react for 100 minutes, turn off the electric heating switch, and pass the cooling water Cool down, when the temperature drops to 60°C, add 100g of toluene diisocyanate to react, turn on the electric heating switch to raise the temperature, the temperature is 75°C, react for 2 hours, add 1g of dibutyltin dilaurate, the temperature is 75°C, continue the reaction for 1 hour, Turn off the electric heating switch, pass cooling water to lower the temperature, discharge when the temperature drops to 45°C, and obtain the product of ...

Embodiment 2

[0025] Add 50g of polyester diol (molecular weight 2000) and 70g of castor oil (i.e. oligomer polyol) into the reactor, start the agitator, turn on the electric heating switch to raise the temperature, when the temperature rises to 105°C, turn on the vacuum pump to evacuate, vacuum The temperature is 0.092MPa, the temperature in the kettle is 118°C, dehydrate for 2.5 hours, add 1.0g triethanolamine and 45g epoxy resin (E-44), the temperature is 130°C, react for 80 minutes, turn off the electric heating switch, and cool down with cooling water , when the temperature drops to 58°C, add 40g of toluene diisocyanate and 50g of diphenylmethane diisocyanate to react, turn on the electric heating switch to raise the temperature, the temperature is 80°C, react for 3 hours, add 1g of triethylamine, the temperature is 80°C, Continue to react for 1.5 hours, turn off the electric heating switch, pass cooling water to lower the temperature, and discharge when the temperature drops to 42°C. ...

Embodiment 3

[0028] Add 60g polyester diol (molecular weight 2500) and 90g polyether triol (molecular weight 2000) into the reaction kettle, start the agitator, turn on the electric heating switch to raise the temperature, when the temperature rises to 102°C, turn on the vacuum pump to evacuate, and the vacuum degree 0.098MPa, the temperature in the kettle is 125°C, dehydrate for 2.5 hours, add 1.1g of diethylenetriamine and 48g of epoxy resin (E-42), the temperature is 140°C, react for 60 minutes, turn off the electric heating switch, and pass the cooling water Cool down, when the temperature drops to 55°C, add 70g of 1,6-hexamethylene diisocyanate and 20g of isophorone diisocyanate to react, turn on the electric heating switch to raise the temperature, the temperature is 85°C, react for 2.5 hours, add 0.8g of triethylenediamine , the temperature is 85°C, continue to react for 1 hour, turn off the electric heating switch, pass cooling water to cool down, and discharge when the temperature ...

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Abstract

The present invention relates to an epoxide-resin-modified single-ingredient polyurethane adhesive and a preparation method thereof. In the preparation method, the hydroxy group of polyalcohol compound is placed in catalyst and under a high-temperature condition of more than 100 DEG C, so that the ring of the epoxy group is opened, as a result, epoxide-resin-modified polyalcohol is produced, and then, the epoxide-resin-modified polyalcohol is reacted with isocyanate, so that the modified single-ingredient polyurethane adhesive, which can be cured without curing agent, is prepared.

Description

technical field [0001] The present invention relates to an epoxy resin modified one-component polyurethane adhesive and its preparation method, in particular to an epoxy resin modified one-component polyurethane adhesive with good toughness, high strength and excellent impact performance and its preparation method. Background technique [0002] Compared with epoxy resin adhesives, polyurethane adhesives have excellent flexibility, but the bonding strength is generally much smaller. Using epoxy resin to modify polyurethane adhesives, using the advantages of the two and complementing the shortcomings, can produce a certain degree of flexibility. There is also a structural polyurethane adhesive with considerable bonding strength. In the past, most epoxy resin modified polyurethane adhesives were two-component, which must be cured by a curing agent. Connectivity, bring trouble and inconvenience to the user. Contents of the invention [0003] The purpose of the present inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C08G18/65C08G18/76
Inventor 袁宏伟郭双喜李冬月王理尧
Owner HUNAN SHENLI IND
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