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Foamable resin particle and method for preparing foaming material from same

A technology for foaming resin and particles, which is applied in the fields of preparing foamed materials and thermoplastic elastomer foaming materials, can solve the problems of complex process, difficulty in obtaining foamed materials, and high difficulty

Active Publication Date: 2015-07-22
浙江杰上杰新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, for the foaming of thermoplastic elastomers, it is necessary to precisely match the foaming rate and the bridging rate. The process is complex and difficult, and it is difficult to obtain ideal foaming materials.

Method used

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  • Foamable resin particle and method for preparing foaming material from same

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preparation example Construction

[0045] The raw material for the preparation of the EVA foam material of the present invention also includes cyclopentadiene organosilicon. The cyclopentadiene organosilicon in the present invention refers to an organosilicon compound having a cyclopentadiene group. Specifically, it can be trimethyl Silylcyclopentadiene, tridisilylcyclopentadiene, trimethyl(2,3,4,5-tetramethyl-2,4-cyclopentadien-1-yl)silane, trimethyl Silylpentamethylcyclopentadiene, 1-ethyl-5-(trimethylsilyl)-1,3-cyclopentadiene, trimethyl(1,2,3,4,5-penta Methylcyclopentadienyl)silane, bis(2,3,4,5-tetramethyl-2,4-cyclopentadien-1-yl)silane dimethyl ester, N-tert-butyl-1 , one or more of 1-dimethyl-1-(2,3,4,5-tetramethyl-2,4-cyclopentadien-1-yl)silylamine. The use of cyclopentadiene silicone can further reduce the permanent compression set rate of EVA foam material.

[0046] Another aspect of the present invention relates to a method for preparing the expandable resin particles, comprising: adding the EVA and...

Embodiment 1

[0069] Put 100 parts by weight of A1 and 60 parts by weight of B1 into a kneader for kneading at 70°C, and then use an extruder to extrude and granulate at 80°C to obtain expandable resin particles.

[0070] Weigh each raw material according to the following parts by weight: 100 parts by weight of C1100 parts by weight, 50 parts by weight of the above-mentioned expandable resin particles, after stirring the above-mentioned raw materials in a medium-speed mixer for 20 minutes, they are fed into the mixture with an aspect ratio of 32: 1. In the twin-screw extruder, the temperature of the twin-screw extruder is controlled at 195°C, the speed of the twin-screw extruder is 600rpm, and the pressure is 2MPa. The raw materials are melted and extruded, and cooled and formed in the mold to obtain lightweight hair bubble material.

Embodiment 2

[0072] Put 100 parts by weight of A1 and 60 parts by weight of B2 into a kneader for kneading at 70°C, and then use an extruder to extrude and granulate at 80°C to obtain expandable resin particles.

[0073] Weigh each raw material according to the following parts by weight: 100 parts by weight of C1100 parts by weight, 50 parts by weight of the above-mentioned expandable resin particles, after stirring the above-mentioned raw materials in a medium-speed mixer for 20 minutes, they are fed into the mixture with an aspect ratio of 32: 1. In the twin-screw extruder, the temperature of the twin-screw extruder is controlled at 195°C, the speed of the twin-screw extruder is 600rpm, and the pressure is 2MPa. The raw materials are melted and extruded, and cooled and formed in the mold to obtain lightweight hair bubble material.

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Abstract

The invention provides a foamable resin particle. The foamable resin particle comprises EVA (ethylene vinyl-acetate copolymer) and a micro-sphere foaming agent, wherein the micro-sphere foaming agent comprises a polymer shell and a foaming agent covered with the polymer shell, and the polymer shell of the micro-sphere foaming agent adopts a single-layer or double-layer structure comprising acrylic polymer; the covered foaming agent in the micro-sphere foaming agent is one or a mixture of ethane, propane, propylene, iso-butane, butane, isobutene, n-pentane, isopentane and petroleum ether. The invention further provides foamable composition comprising a thermoplastic elastomer and the foamable resin particle as well as a foaming material prepared from the foamable composition, a method for preparing the foaming material and a product comprising the foaming material.

Description

technical field [0001] The invention relates to an expandable resin particle and a method for preparing foamed material by using the expandable resin particle. More specifically, the present invention relates to an expandable resin particle for a thermoplastic elastomer, and a method for preparing a thermoplastic elastomer foam material using the expandable resin particle. Background technique [0002] Thermoplastic elastomer foaming materials have excellent aging resistance, both plasticity and high elasticity, and are widely used in various fields such as automotive interiors, medical equipment, high-speed rail gaskets, and insoles. However, since the viscosity of the thermoplastic elastomer colloid drops rapidly when heated and melted, in order to keep the gas in the foaming process, the colloid must have a certain viscoelasticity, so a bridging agent must be added. At the same time, there is a linear relationship between the bridging degree and the melt viscosity of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L31/04C08J9/16C08J9/14C08L53/02C08L101/00C08L67/00C08L75/04C08J9/228
CPCC08J9/141C08J9/142C08J9/16C08J9/228C08J2203/14C08J2203/146C08J2203/16C08J2353/02C08J2367/00C08J2375/04C08J2423/08C08L23/0853C08L53/02C08L67/00C08L75/04C08L101/00C08L2203/14
Inventor 罗李华
Owner 浙江杰上杰新材料股份有限公司
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