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High-oil-resistance polyurethane adhesive

A polyurethane adhesive, oil resistance technology, applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve the problems of limited application scope and high cost, achieve high peel strength and medium resistance, good The effect of oil resistance

Active Publication Date: 2013-05-15
浙江博菲电气股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of the adhesive is high, and the scope of application is limited

Method used

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  • High-oil-resistance polyurethane adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Prepare the main ingredient: (1) According to the ratio in Table 1, mix the adipic acid, isophthalic acid, phthalic anhydride, ethylene glycol, propylene glycol, and diethylene glycol in the main ingredient, and then perform esterification reaction at 150-230°C , the esterification was carried out for 10 hours (during the reaction, the temperature was gradually increased from 150°C to 230°C according to the degree of reaction), and the reaction was stopped; (2) The material liquid obtained from the esterification of step (1) was placed in a vacuum environment of 0-0.01MPa Carry out polycondensation reaction and react for 5 hours to obtain polyester polyol with an average molecular weight of 5000 and an acid value of 0.40; (3) add toluene diisocyanate chain extender to step (2) and react 4 polyols at 80-110°C After one hour, add ethyl acetate to dilute to obtain a light yellow transparent main agent with a viscosity of 2000 mPa.s (the weight percent content of solids in t...

Embodiment 2

[0033] Prepare the main ingredient: (1) According to the ratio in Table 1, mix the adipic acid, isophthalic acid, phthalic anhydride, ethylene glycol, propylene glycol, and diethylene glycol in the main ingredient, and then perform esterification reaction at 150-230°C , the esterification was carried out for 10 hours (during the reaction, the temperature was gradually increased from 150°C to 230°C according to the degree of reaction), and the reaction was stopped; (2) The material liquid obtained from the esterification of step (1) was placed in a vacuum environment of 0-0.01MPa Carry out polycondensation reaction and react for 5 hours to obtain a polyester polyol with an average molecular weight of 4750 and an acid value of 0.35; (3) add toluene diisocyanate chain extender to step (2) and react 4 polyols at 80-110°C After one hour, add ethyl acetate to dilute to obtain a light yellow transparent main agent with a viscosity of 2200 mPa.s (the weight percent content of solids in...

Embodiment 3

[0037] Prepare the main ingredient: (1) According to the ratio in Table 1, mix the adipic acid, isophthalic acid, phthalic anhydride, ethylene glycol, propylene glycol, and diethylene glycol in the main ingredient, and then perform esterification reaction at 150-230°C , the esterification was carried out for 10 hours (during the reaction, the temperature was gradually increased from 150°C to 230°C according to the degree of reaction), and the reaction was stopped; (2) The material liquid obtained from the esterification of step (1) was placed in a vacuum environment of 0-0.01MPa Carry out polycondensation reaction and react for 5 hours to obtain a polyester polyol with an average molecular weight of 4800 and an acid value of 0.48; (3) add toluene diisocyanate chain extender to step (2) and react 4 polyols at 80-110° C. After one hour, ethyl acetate was added to dilute to obtain a light yellow transparent main agent with a viscosity of 2260 mPa.s (the weight percent content of s...

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Abstract

The invention discloses a high-oil-resistance polyurethane adhesive. The high-oil-resistance polyurethane adhesive comprises a main agent and a curing agent; the main agent is a polyester type polyalcohol compound with hydroxyl blocked, wherein the polyester type polyalcohol compound is obtained by the reaction among adipic acid, isophthalic acid, phthalic anhydride, glycol, propylene glycol, diethylene glycol, toluene diisocynate and acetic ether; and the curing agent is an addition product obtained by the reaction among the toluene diisocynate, trimethylolpropane and acetic ether. According to the high-oil-resistance polyurethane adhesive, the aromatic acid is introduced, so that the prepared adhesive is higher in peeling strength and media resistance; and the dihydric alcohol compound is adopted, so that the compounded film is higher in oil resistance, and the requirement on manufacture of oil-resistance packaging bags can be completely met.

Description

technical field [0001] The invention relates to an adhesive, in particular to a highly oil-resistant polyurethane adhesive. Background technique [0002] Polyurethane adhesives refer to adhesives containing carbamate groups (-NHCOO-) or isocyanate groups (-NCO) in the molecular chain. Polyurethane adhesives are divided into two categories: polyisocyanate and polyurethane. Polyisocyanate molecular chains contain isocyano groups (-NCO) and carbamate groups (-NH-COO-), so polyurethane adhesives exhibit high activity and polarity. It has excellent chemical adhesion to substrates containing active hydrogen, such as porous materials such as foam, plastic, wood, leather, fabric, paper, ceramics, and materials with smooth surfaces such as metal, glass, rubber, and plastic. [0003] At present, some metal products in industrial product packaging, such as small hardware, bearings, instruments, meters, etc., in order to prevent the metal surface from rusting and the aesthetics of the...

Claims

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Application Information

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IPC IPC(8): C09J175/06C08G18/42C08G63/672
Inventor 马建飞陆云峰
Owner 浙江博菲电气股份有限公司
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