Interpenetrating polymer networks wide temperature band damping adhesive and its preparation method

An interpenetrating network, adhesive technology, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problems of poor heat resistance, limited use range, high temperature resistance of PU and poor rigidity

Inactive Publication Date: 2003-03-05
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PU has poor high temperature resistance and rigidity. PRA adhesive has a wide source of raw materials, is easy to synthesize, is basically non-toxic and non-environmental pollution, has a wide bonding surface and good bonding performance, but PRA adhesive determines its heat resistance due to its own structure. The performance is poor, and the scope of use is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] The preparation method of the interpenetrating network wide temperature band damping adhesive of the present invention comprises the following steps:

[0024] 1) Synthesis of polyester

[0025] Put adipic acid, butanediol, and hexanediol in a molar ratio of 1:0.8:0.25 in a reaction kettle, and nitrogen gas N 2 Protection, heat up until adipic acid melts, stir, continue to heat up to water outlet, control the temperature at 160-180°C for full reaction, stop passing N 2 , start vacuuming, gradually from low vacuum to high vacuum, and react for 2 hours as the temperature rises to 220 ° C, cool down, stop vacuuming, and discharge to obtain polyester with a molecular weight of 2000.

[0026] 2) Polyurethane prepolymer synthesis

[0027] Add ethyl acetate to the polyester dehydrated in step 1) as a solvent, dissolve it, stir well, then add toluene diisocyanate dropwise to the polyester under nitrogen protection, the molar ratio of toluene diisocyanate to polyester is 0.7:1...

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PUM

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Abstract

The present invention discloses an interpenetrating network wide-temp. band damping adhesion agent, is made of the glue formed from polyurethane prepolymer and polyacrylate copolymer, polyurethane solidifying agent and polyacrylate solidifying agent. Its preparation method includes: (1). synthesizing polyester; (2). synthesizing polyurethane prepolymer; (3). synthesizing polyurethane solidifying agent; (4). synthesizing polyacrylate copolymer; (5). synthesizing polyacrylate solidifying agent; and (6). uniformly mixing polyurethane prepolymer and polyacrylate copolymer to obtain glue. Said invention can forcedly mix the obtained two component adhesive to form the alloy of interpenetrating neetwork polymer, i.e. interpenetrating network wide-temp. band damping adhesion agent which can mave vibration energy.

Description

technical field [0001] The invention relates to an adhesive and a preparation method thereof, in particular to an interpenetrating network wide temperature band damping adhesive and a preparation method thereof. Background technique [0002] Adhesives used in automobiles are required to be shockproof, heat-insulating, anti-corrosion, rain-proof, sealed, reduce noise, reduce quality, improve performance and prolong service life. Also, the environment in which cars are used is often very harsh. They have to withstand the severe winter heat, the test of wind, frost, rain and snow, and high-speed driving on rough roads will not only bring violent vibration, distortion, and noise to the car, but also cause damage to certain parts. high temperature. Therefore, the adhesive used in automobiles must not only have a certain bonding strength and sealing performance, but also have a certain damping performance to play the role of heat insulation, sound insula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J9/00C09J175/04C09J175/06
Inventor 胡巧玲曹军
Owner ZHEJIANG UNIV
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