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Polyurethane adhesive for compositing two-component PVC plate

A polyurethane adhesive, two-component technology, applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve the problems of composite board deformation, low surface polarity, and reduced bond strength, etc., to achieve guaranteed Effects of dimensional stability, improvement of thixotropy, and improvement of adhesion

Active Publication Date: 2016-09-07
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

[0004] PVC is a kind of plastic with low surface polarity. Due to the addition of more plasticizers during processing, it will migrate and ooze out after a long time, which makes it more difficult to bond; in addition, PVC and wood-plastic board / cork board are two different types. The thermal expansion properties of different materials are relatively different, and PVC has the characteristics of cold hard and hot soft. If the bond is not strong, the composite board will be deformed or even glued.
[0005] At present, there is no patent report on the application of two-component solvent-free polyurethane adhesives to PVC boards. The market is currently using solvent-based adhesives, which seriously pollute the environment and continue to endanger human health; moreover, solvents can corrode and swell PVC films. , leading to a decrease in bond strength and affecting the dimensional stability of the product

Method used

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  • Polyurethane adhesive for compositing two-component PVC plate
  • Polyurethane adhesive for compositing two-component PVC plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The special polyurethane adhesive of the two-component composite PVC sheet of the present embodiment is specifically as follows:

[0027] Component A: Weigh 18kg of castor oil, 12kg of polyether polyol, 5kg of silane coupling agent, 1kg of fumed silica, 56kg of calcium carbonate, and 8kg of 4A molecular sieve in a 200L reaction kettle. , -0.096Mpa dehydration until the moisture is below 500ppm, and the material is discharged.

[0028] Component B: Weigh 12kg of polyether polyol, 18kg of polyester polyol, 2kg of 1,4-butanediol, diphenylmethylene diisocyanate and polymethylene polyphenylisocyanate in a 200L reactor Respectively 50kg and 18kg, react at 80-100°C for 4-6h, control NCO% at 10-25%, and discharge.

[0029] Mix components A and B at a mass ratio of 3:1 to make a stainless steel shear sample, and test the shear strength after 3 days at room temperature under the curing condition (GB / T7124-2008); use PVC / plate as the test sample, and cure under the condition of ...

Embodiment 2

[0031] The special polyurethane adhesive of the two-component composite PVC sheet of the present embodiment is specifically as follows:

[0032] Component A: Weigh 12kg of castor oil, 18kg of polyether polyol, 3kg of silane coupling agent, 2kg of fumed silica, 55kg of calcium carbonate and 10kg of 4A molecular sieve in a 200L reactor. ℃, -0.096Mpa dehydration until the water content is lower than 500ppm, and the material is discharged.

[0033] Component B: Weigh 5kg of polyether polyol, 15kg of polyester polyol, 4kg of 1,4-butanediol, diphenylmethylene diisocyanate and polymethylene polyphenylisocyanate in a 200L reactor Respectively 56kg and 18kg, react at 80-100°C for 4-6h, control NCO% at 10-25%, and discharge.

[0034] Mix components A and B at a mass ratio of 2:1 to make a stainless steel shear sample. The curing condition is normal temperature for 3 days and then test the shear strength (GB / T7124-2008); use PVC / plate as the test sample, and the curing condition is Tes...

Embodiment 3

[0036] The special polyurethane adhesive of the two-component composite PVC sheet of the present embodiment is specifically as follows:

[0037] Component A: Weigh 15kg of castor oil, 15kg of polyether polyol, 5kg of silane coupling agent, 2kg of fumed silica, 55kg of calcium carbonate and 8kg of 4A molecular sieve in a 200L reactor. ℃, -0.096Mpa dehydration until the water content is lower than 500ppm, and the material is discharged.

[0038]Component B: Weigh 6kg of polyether polyol, 18kg of polyester polyol, 3kg of 1,4-butanediol, diphenylmethylene diisocyanate and polymethylene polyphenylisocyanate in a 200L reactor Respectively 58kg and 15kg, react at 80-100°C for 4-6h, control NCO% at 10-25%, and discharge.

[0039] Mix components A and B at a mass ratio of 3:1 to make a stainless steel shear sample, and test the shear strength after 3 days at room temperature under the curing condition (GB / T7124-2008); use PVC / plate as the test sample, and cure under the condition of ...

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Abstract

The invention discloses a polyurethane adhesive for compositing a two-component PVC plate. The adhesive is composed of a component A and a component B according to the mass ratio of (1-4):1, and the component A is composed of, by weight, 10%-25% of castor oil, 10%-20% of polyether polyol, 1%-5% of coupling agent, 0.5%-2.5% of fumed silica, 30%-60% of filler and 5%-10% of drying agent; the component B is composed of, by weight, 50%-80% of isocyanate, 5%-15% of polyether polyol, 10%-30% of polyester polyol and 1%-4% of chain extender. A preparation method of the polyurethane adhesive for compositing the two-component PVC plate comprises the following steps of preparation of the component A, preparation of the component B and mixing of the component A and the component B. The polyurethane adhesive is used for bonding PVC with a plate. The polyurethane adhesive has the advantages of being free of solvent evaporation, large in initial adhesion, excellent in adhesive force on PVC, high in strength, wide in environmental adaptability, long in storage life, high in stability, environmentally friendly in raw material, capable of obtaining the raw materials conveniently and the like.

Description

technical field [0001] The invention relates to the field of adhesives, in particular to a polyurethane adhesive for compounding two-component PVC boards. 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. [0003] PVC sheet is widely used in offices, schools, hospitals, pharmaceutical factories, Sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J175/06C09J11/04C09J11/06C08G18/67C08G18/66C08G18/48C08G18/42C08G18/32
CPCC08G18/36C08G18/4018C08G18/6662C08G18/6696C08K3/26C08K3/36C08K7/26C08K13/04C09J11/04C09J11/06C09J175/06C09J175/08
Inventor 杨军方俊许期斌杨丽燕
Owner 上海都昱新材料科技有限公司
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