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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

Active Publication Date: 2021-08-24
HUBEI XIANGYUAN NEW MATERIAL TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, at the same time, factors such as raw material type, molecular weight, soft and hard segment content, open porosity, and pore size distribution will restrict the later compression performance of foamed materials.

Method used

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  • Compression-resistant polyurethane foam and preparation method thereof
  • Compression-resistant polyurethane foam and preparation method thereof
  • Compression-resistant polyurethane foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

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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PUM

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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

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IPC IPC(8): C08J9/32C08J9/14C08G18/69C08G18/66C08G18/62C08G18/44C08G18/42C08G18/32C09D175/04C09D175/06C09D175/14
CPCC08J9/32C08J9/141C08G18/698C08G18/44C08G18/3275C08G18/6655C08G18/6208C08G18/3281C08G18/3206C08G18/6644C08G18/4238C09D175/14C09D175/04C09D175/06C08J2203/22C08J2203/14C08J2203/182C08J2375/04C08J2375/06C08J2375/14
Inventor 高虎亮魏琼
Owner HUBEI XIANGYUAN NEW MATERIAL TECH INC
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