Polyurethane foam base adhesive tape

A technology of polyurethane and foam, which is applied in the direction of adhesives, film/sheet adhesives, etc., can solve the problems of insufficient shock resistance, large thickness, and insufficient strength, and achieve nucleation of cells, thin thickness, and elasticity. and good toughness

Inactive Publication Date: 2016-08-10
NINGBO JIXIANG PLASTIC PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the development of science and technology and industry, the requirements for the use of tapes in manufacturing and daily life are getting higher and higher. The use of traditional PU foam-based foam tapes in some specific areas is limited, such as thicker Large, not strong enough, not good enough for shock resistance, not suitable for use in some precision electronic industries and other fields

Method used

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  • Polyurethane foam base adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Mix 100 parts of polyester polyol and 11.5 parts of HDI in N 2 Heating and reacting under ambient conditions for 1.5 hours, the reaction temperature is 70°C, then cooling down to 50°C, adding 8 parts of chain extender diethylene glycol, keeping the reaction for 3 hours, then adding 1.0 parts of light stabilizer UV-329 and 5 parts of medium Porous Nano TiO 2 , stir evenly to obtain a polyurethane prepolymer, add 5 parts of cross-linking agent HDI trimer to the polyurethane prepolymer, stir evenly, and cure at 100°C for 20 minutes to obtain a polyurethane base material, the isocyanate index of the polyurethane base material is 3.5 ;

[0046] The polyurethane base material is made into a polyurethane film or sheet by a common method;

[0047] Put the polyurethane film or sheet in a high-pressure reactor, first use supercritical CO 2 Purge the system with fluid, drain the air, seal the autoclave, raise the temperature of the system to 110°C, and inject CO 2 The fluid co...

Embodiment 2

[0050] Mix 100 parts of polyester polyol and 19.3 parts of HDI in N 2 Heating and reacting under ambient conditions for 2.0 hours, the reaction temperature is 78°C, then cooling down to 60°C, adding 10 parts of chain extender glycerene propylene ether, keeping it warm for 3.5 hours, then adding 1.8 parts of light stabilizer antioxidant 1010 and 8 parts of silane Coupling agent modified mesoporous nano-TiO 2 , stir evenly to obtain a polyurethane prepolymer, add 8 parts of cross-linking agent HDI trimer to the polyurethane prepolymer, stir evenly, and cure at 110°C for 25 minutes to obtain a polyurethane base material, the isocyanate index of the polyurethane base material is 4.2 ;

[0051] The polyurethane base material is made into a polyurethane film or sheet by a common method;

[0052] Put the polyurethane film or sheet in a high-pressure reactor, first use supercritical CO 2 Purge the system with fluid, drain the air, seal the autoclave, raise the temperature of the sy...

Embodiment 3

[0055] Mix 100 parts of polyester polyol and 28.3 parts of HDI in N 2 Heat the reaction for 2.5 hours under ambient conditions, the reaction temperature is 85°C, then cool down to 65°C, add 12 parts of chain extender diethanolamine, keep it warm for 4 hours, then add 2.5 parts of light stabilizer GW-540 and 5-11 parts of titanate Coupling agent modified mesoporous nano-TiO 2 , stir evenly to obtain a polyurethane prepolymer, add 13 parts of cross-linking agent HDI trimer to the polyurethane prepolymer, stir evenly, and cure at 115°C for 30 minutes to obtain a polyurethane base material, the isocyanate index of the polyurethane base material is 4.6 ;

[0056] The polyurethane base material is made into a polyurethane film or sheet by a common method;

[0057] Put the polyurethane film or sheet in a high-pressure reactor, first use supercritical CO 2 Purge the system with fluid, drain the air, seal the autoclave and raise the temperature of the system to 120°C, inject CO 2 T...

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Abstract

The invention relates to a polyurethane foam base adhesive tape and belongs to the technical field of adhesive tapes. The polyurethane foam base adhesive tape comprises a polyurethane foam base plate, a glue coating and a release film. The polyurethane foam base plate comprises, by weight, 100 parts of polyester polyol, 11.5-28.3 parts of diisocyanate, 8-12 parts of a chain extender, 5-13 parts of a cross-linking agent, 1.0-2.5 parts of a light stabilizing agent and 5-11 parts of mesoporous nano-TiO2. The polyurethane foam base adhesive tape has high strength, good toughness, good impact resistance and small thickness and can be used for precision apparatus manufacture. The mesoporous nano-TiO2 heterogeneous nucleation effects improve a polyurethane foam base plate microporous structure and improve strength, toughness and shock resistance. Supercritical CO2 is used for polyurethane foam base plate foaming so that safety and environmental friendliness are obtained. The foam has uniform and fine pores. The polyurethane foam has any thickness and is suitable in different fields.

Description

technical field [0001] The invention belongs to the technical field of adhesive tapes and relates to a polyurethane foam base adhesive tape. Background technique [0002] Foam tape is made of foam as the base material, coated with solvent-based (or hot-melt) pressure-sensitive adhesive on one or both sides and then coated with release paper. It has excellent sealing performance, compression deformation resistance and long-lasting Excellent resilience can avoid gas release and atomization, and can ensure long-term shockproof protection for accessories. Foam tape can be used for bonding substrates such as curved surfaces, rough surfaces and smooth surfaces, and as time goes on, the contact area between the foam tape and the substrate to be bonded will become larger, and the bonding performance will not decrease too much . Foam tape also has slow rebound characteristics, the deformation will recover slowly with time, and has good impact resistance; it has lower density and ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C08K9/04C08K9/06C08K3/22C08G18/42C08G18/76C08J9/12
CPCC08G18/42C08G18/7614C08J9/122C08J2203/06C08J2475/06C08K3/22C08K9/04C08K9/06C08K2003/2237C08K2201/011C09J7/26C09J2475/006
Inventor 洪连伟李宣瑾
Owner NINGBO JIXIANG PLASTIC PROD CO LTD
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