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Dual-component high-thixotropy polyurethane adhesive

A polyurethane adhesive and thixotropy technology, used in polyurea/polyurethane adhesives, adhesives, non-polymer adhesive additives, etc., can solve problems such as incompatibility of the system, and achieve the effect of improving thixotropy

Active Publication Date: 2016-05-25
上海都昱新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the use environment or the sizing surface is a vertical or vertical surface, the above system is obviously not suitable, and a polyurethane adhesive with high thixotropic properties is required at this time

Method used

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  • Dual-component high-thixotropy polyurethane adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The highly thixotropic polyurethane adhesive of the present embodiment is specifically as follows:

[0024] Component A: Weigh 24kg of castor oil, 15kg of polyoxypropylene glycol, 2kg of 1,4-butanediol, 1kg of glycerin in a 150L reaction kettle, heat and vacuumize at 100°C for 1h, planetary speed at 30Hz, and then add to the gas phase 3kg of silicon dioxide, 50kg of calcium carbonate, 5kg of 4A molecular sieve, at this time, the planetary speed is 30HZ, the dispersion is 1000rpm, and then the vacuum is turned on -0.1Mpa, defoaming for about 20min, and the material is discharged.

[0025] Component B: Composed of polymethylene polyphenylisocyanate.

[0026] Mix components AB at a mass ratio of 100:20 to make shear samples and impact samples, and cure them at room temperature at 25°C for 7 days to test the shear strength of samples at room temperature and the thixotropic ratio of glue A.

Embodiment 2

[0028] The highly thixotropic polyurethane adhesive of the present embodiment is specifically as follows:

[0029] Component A: Weigh 22kg of castor oil, 17kg of polyoxypropylene triol, 1kg of 1,4-butanediol, 1kg of glycerin in a 150L reaction kettle, heat and vacuumize at 100°C for 1h, and then add the gas phase 4kg of silicon dioxide, 50kg of calcium carbonate, 5kg of 3A molecular sieve, at this time, the planetary speed is 30Hz, the dispersion is 1000rpm, then the vacuum is turned on -0.1Mpa, defoaming for about 20min, and the material is discharged.

[0030] Component B: Composed of polymethylene polyphenylisocyanate.

[0031] Mix components AB at a mass ratio of 100:20 to make shear samples and impact samples, and cure them at room temperature at 25°C for 7 days to test the shear strength of samples at room temperature and the thixotropic ratio of glue A.

Embodiment 3

[0033] The highly thixotropic polyurethane adhesive of the present embodiment is specifically as follows:

[0034] Component A: Weigh 24kg of castor oil, 16kg of polyoxyethylene glycol, 3kg of 1,3-propanediol, 1kg of glyceryl monostearate in a 150L reactor, heat and vacuumize at 100°C for 1h, planetary speed 30Hz, Then add 5kg of fumed silicon dioxide, 50kg of silicon micropowder, and 5kg of 4A molecular sieve. At this time, the planetary speed is 30Hz, and the dispersion is 1000rpm. Then turn on the vacuum -0.1Mpa, defoam for about 20min, and discharge.

[0035] Component B: Composed of polymethylene polyphenylisocyanate.

[0036] Mix components AB at a mass ratio of 100:20 to make shear samples and impact samples, and cure them at room temperature at 25°C for 7 days to test the shear strength of samples at room temperature and the thixotropic ratio of glue A.

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Abstract

The invention discloses a dual-component high-thixotropy polyurethane adhesive. The dual-component high-thixotropy polyurethane adhesive is prepared from a component A and a component B. The component A is prepared from castor oil, polyether polyol, a chain extension agent, surfactant, gas-phase silica, filler and a drying agent according to the weight ratio, and the component B is prepared from isocyanate. The dual-component high-thixotropy polyurethane adhesive is high in strength, raw materials are easy to obtain, good thixotropy is achieved, the effect of applying adhesives in the fade or the vertical face is achieved, and the dual-component high-thixotropy polyurethane adhesive is particularly suitable for plate alignment adhesives, rod alignment adhesives and adhesion of two contact faces and is applied to compartment structural element adhesion in compartments of refrigerator cars and trucks.

Description

technical field [0001] The invention relates to an adhesive, in particular to a two-component polyurethane adhesive with high thixotropy. Background technique [0002] Polyurethane adhesives refer to adhesives containing carbamate groups (-NHCOO-) or isocyanate groups (-NCO) in the molecular chain. Polyurethane adhesives have always had the following characteristics: high reactivity, high bonding strength to substrates containing active hydrogen or water absorption, such as metal, wood, rubber, fiber, wood, leather, plastic, etc., both It can be cured at room temperature or heated. It is easy to form a cross-linked structure. The hardness of the adhesive layer is also high. The operation is simple and convenient. It has excellent low temperature resistance, good flexibility, high peel strength, impact resistance, vibration resistance, and good fatigue resistance. The disadvantage is that the resistance to heat and humidity is poor, and the resistance to strong acid and alka...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J11/04C08G18/66C08G18/48C08G18/32C08G18/36C08K3/36C08K3/26
CPCC08G18/3206C08G18/36C08G18/4833C08G18/6674C08K3/26C08K3/36C08K2003/265C09J11/04C09J175/08
Inventor 黄荣杨丽燕许期斌
Owner 上海都昱新材料科技有限公司
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