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Mixed polyurethane crosslinked foam material and preparation method thereof

A technology of mixing polyurethane and Lianfa, which is applied in the field of foaming materials, can solve the problems of high compression set, poor elasticity, and poor shrinkage performance, and achieve low compression set, good elasticity, and good shrinkage resistance.

Active Publication Date: 2018-10-16
GUANGZHOU SHUNLI POLYURETHANE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a mixing type polyurethane cross-linked foaming material to improve the technical problems of existing casting type polyurethane foaming materials such as defective areas, poor elasticity, high compression set and poor shrinkage performance

Method used

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  • Mixed polyurethane crosslinked foam material and preparation method thereof

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preparation example Construction

[0075] According to another aspect of the present invention, the present invention provides the preparation method of above-mentioned mixing type polyurethane cross-linked foaming material, comprises the steps:

[0076] (a) mixing the mixing type polyurethane, vinyl copolymer, foaming agent, crosslinking agent, optional reinforcing agent and optional filler uniformly, performing banburying and kneading in sequence to obtain a kneaded product;

[0077] (b) extruding and granulating the kneaded product to obtain cross-linked foamed granules;

[0078] (e) Putting the cross-linked foamed particles into a mold for cross-linked foaming to obtain a mixing-type polyurethane cross-linked foamed material.

[0079] The preparation method of the mixing-type polyurethane cross-linked foaming material provided by the invention is simple to operate, does not require high operating proficiency of equipment and staff, can effectively reduce manufacturing costs, and improve production efficienc...

Embodiment 1

[0098]This embodiment provides a mixing type polyurethane cross-linked foaming material, which is made of the following raw materials in parts by mass: 20 parts of mixing type polyurethane, 80 parts of ethylene-vinyl acetate copolymer (EVA), foaming 4 parts of cross-linking agent and 1 part of cross-linking agent; among them, the mixing type polyurethane is polymerized by polyether butylene glycol, toluene diisocyanate and α-allyl glyceryl ether, and the Mooney viscosity is 50; ethylene-vinyl acetate copolymer The melt index of (EVA) is 10g / min; the cross-linking agent is di-(tert-butylperoxyisopropyl)benzene (DIPB); A composition of nitrosopentamethylenetetramine (DPT), and the mass ratio of the two is 5:3.

Embodiment 2

[0100] This embodiment provides a mixing type polyurethane cross-linked foaming material, which is made of the following raw materials in parts by mass: 90 parts of mixing type polyurethane, 8 parts of ethylene-vinyl acetate copolymer (EVA), polyolefin 2 parts of elastomer (POE), 4.4 parts of foaming agent, 0.6 parts of crosslinking agent; among them, the mixing type polyurethane is polymerized by polyether butylene glycol, p-phenylene diisocyanate and trimethylolpropane monoallyl ether , and the Mooney viscosity is 120; the melt index of ethylene-vinyl acetate copolymer is 1g / min, and the melt index of polyolefin elastomer (POE) is 20g / min; the crosslinking agent is dicumyl peroxide (DCP) The foaming agent is a composition of dicumyl peroxide (DCP) and two-(tert-butylperoxyisopropyl)benzene (BIPB), and the mass ratio of the two is 5:1.

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Abstract

The invention provides a mixed polyurethane crosslinked foam material and a preparation method thereof and relates to the technical field of foam materials. The mixed polyurethane crosslinked foam material comprises, by weight, 20-95 parts of mixed polyurethane, 5-80 parts of a vinyl copolymer, 0.1-5 parts of a crosslinker, and 0.5-15 parts of a foaming agent, and the mixed polyurethane has Mooneyviscosity of 10-150. The technical problem is solved that existing cast polyurethane foam material has defective regions, poor elasticity, high compressive permanent deformation and poor shrinkage; the mixed polyurethane and the vinyl copolymer are crosslinked and foamed under the action of the crosslinker and the foaming agent; the process is controllable, and pores are uniformly distributed; the prepared mixed polyurethane crosslinked foam material has low density, good elasticity, good wear resistance and slip resistance, low compressive permanent deformation, good shrinkage resistance, and excellent comprehensive performance, and can effectively meet the requirements of various fields.

Description

technical field [0001] The invention relates to the technical field of foaming materials, in particular to a mixing type polyurethane cross-linked foaming material and a preparation method thereof. Background technique [0002] With plastic as the matrix, a large number of bubbles are filled inside the plastic by physical or chemical methods to obtain polymer foam materials. The foam materials have many advantages such as low density, heat insulation and sound insulation, high specific strength and good cushioning performance. , industry, agriculture, transportation, military industry, aerospace industry and daily necessities and other fields are widely used. Commonly used foaming materials include polyurethane foaming materials, polyethylene foaming materials, polypropylene foaming materials and polystyrene foaming materials. Polyurethane foam materials have the advantages of wide hardness range, excellent wear resistance, mechanical strength, oil resistance, water resista...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L23/08C08K5/14C08K13/02C08J9/10B29C44/60
CPCB29C44/60C08J9/0023C08J9/0061C08J9/0095C08J9/103C08J9/107C08J2203/04C08J2203/18C08J2375/08C08J2423/08
Inventor 李斌
Owner GUANGZHOU SHUNLI POLYURETHANE TECH
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