Compression-resistant polyurethane foam and preparation method thereof

A polyurethane foam, polyurethane technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve problems such as restricting the compression performance of foam materials

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A polyurethane foam, polyurethane technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve problems such as restricting the compression performance of foam materials

CN113292764AActive Publication Date: 2021-08-24HUBEI XIANGYUAN NEW MATERIAL TECH INC

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Embodiment 1

[0029] This embodiment is a combination of A1 and B1, wherein component A includes: 100 parts of polybutadiene diol with a molecular weight of 5000, 3 parts of expanded microspheres, 5 parts of n-pentane, 0.2 parts of bismuth isooctanoate, polysiloxane 0.5 parts of alkane; component B includes 100 parts of polycarbonate diol with a molecular weight of 300, 3 parts of diethanolamine, 142.13 parts of toluene diisocyanate, and the content of isocyanate groups is 15 wt%. Mix component A and component B separately, and take 11.2 parts of component B and mix it with the above component A; then apply it on the surface of PET film according to the coating thickness of 0.1mm, and heat and cure it at a temperature of 115°C for 20 minutes to obtain Polyurethane foam.

Embodiment 2

[0031]The present embodiment is a combination of A2 and B2, wherein component A includes: 100 parts of hydrogenated polybutadiene diol with a molecular weight of 6000, 3.5 parts of expanded microspheres, 6 parts of isopentane, 0.25 parts of bismuth neodecanoate, poly 0.6 parts of siloxane; component B includes 100 parts of polycarbonate diol with a molecular weight of 500, 3.5 parts of triethanolamine, 187.08 parts of diphenylmethane diisocyanate, and the content of isocyanate groups is 15 wt%. Mix component A and component B separately, and take 9.3 parts of component B and mix it with the above component A; then apply it on the surface of PBT film according to the coating thickness of 0.2mm, heat and cure at a temperature of 116°C for 19min, and obtain Polyurethane foam.

Embodiment 3

[0033] This embodiment is a combination of A3 and B3, wherein component A includes: 100 parts of polyisoprene diol with a molecular weight of 7000, 4 parts of expanded microspheres, 7 parts of cyclopentane, 0.25 parts of zinc isooctanoate, polysilicon 0.7 parts of oxane; component B includes 100 parts of polycarbonate diol with a molecular weight of 800, 4 parts of trimethylolpropane, 99.93 parts of xylylene diisocyanate, and the content of isocyanate groups is 15 wt%. Mix component A and component B separately, and take 8 parts of component B and mix it with the above component A; then apply it on the surface of the PC film according to the coating thickness of 0.3 mm, heat and cure at a temperature of 117 ° C for 18 minutes, and obtain Polyurethane foam.

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Abstract

The invention discloses compression-resistant polyurethane foam. The compression-resistant polyurethane foam comprises a component A and a component B, wherein the component A comprises polydihydric alcohol of which the molecular chain does not contain F, O and N elements, and expanded microspheres, a low-boiling-point foaming agent, a catalyst and a surfactant; the component B comprises diisocyanate, a chain extender, a cross-linking agent and polydihydric alcohol, wherein the diisocyanate is excessive; the component A and the component B are mixed and then coated on the surface of a high polymer material or metal material film, and the polyurethane foam is obtained after curing molding. The invention also discloses a preparation method of the compression-resistant polyurethane foam. The final polyurethane molecular blocks are arranged in order, and the polyurethane foam has a three-stage compression-damping structure at a microscopic level so that the polyurethane foam has good compression resistance, has long service time under a compression condition, and can better adapt to a service environment and protect devices.

Description

technical field [0001] The invention belongs to the technical field of foaming materials, and in particular relates to a super-compression-resistant polyurethane foam and a preparation method thereof. Background technique [0002] As an emerging polymer material, polyurethane has attracted extensive attention due to its unique physical properties and has many applications. Polyurethane used as a foaming material has adjustable softness and hardness, a wide range of processing, and is easy to form. It has a huge annual consumption in the fields of furniture, building materials, sports equipment, and transportation. [0003] At present, the polyurethane foam materials used in the electronic product industry are mainly polyurethane foam sheets, which play a role in functional fields such as frame sealing, module protection, hardware support, etc., and in view of the dexterity of electronic products, most of them will be compressed and used , The thickness used is often concent...

Claims

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Application Information

Patent Timeline

24 Aug 2021

Publication

CN113292764A

IPC: C08J9/32; C08J9/14; C08G18/69; C08G18/66; C08G18/62; C08G18/44; C08G18/42; C08G18/32; C09D175/04; C09D175/06; C09D175/14

CPC: C08J9/32; C08J9/141; C08G18/698; C08G18/44; C08G18/3275; C08G18/6655; C08G18/6208; C08G18/3281

Inventors: 高虎亮; 魏琼