Micropore EPDM foamed material with excellent compression resilience performance and preparation method

A technology of EPDM rubber and foam materials, applied in the field of foam materials, can solve the problems of large relaxation and creep of foam materials, poor compression resilience, poor recovery and the like

Inactive Publication Date: 2016-02-03
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention overcomes the deficiencies of the prior art, and provides a microporous EPDM foam material with excellent compression resilience and a preparation method thereof, in order to solve the problem of large relaxation and creep, poor compression resilience, and restorative properties of the foam material. poor problem

Method used

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  • Micropore EPDM foamed material with excellent compression resilience performance and preparation method
  • Micropore EPDM foamed material with excellent compression resilience performance and preparation method
  • Micropore EPDM foamed material with excellent compression resilience performance and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] 100 parts of ethylene-propylene-ethylidene norbornene copolymer (brand name MITSUI4045, Mooney viscosity 45, iodine value 23), 50 parts BET specific surface area is 195m 2 Dry-process silica AS-200 (trade name, manufactured by Shenyang Chemical Co., Ltd.) per g, 15 parts of liquid paraffin oil and 3 parts containing silanol groups at both ends and having a viscosity of 29 mm 2 / s (23°C) dimethyl polysiloxane was added to a 5L internal mixer, heated and internally kneaded at 80°C for 30 minutes, and the discharged material was cooled to room temperature to obtain EPDM rubber reinforcing base material.

[0074] 100 parts containing 90.825 mol % of dimethyl siloxane unit, 0.15 mol % of methyl vinyl siloxane unit, 10.0 mol % of methylphenyl siloxane unit, 0.025 mol % of dimethyl vinyl siloxane unit % of organopolysiloxane with an average degree of polymerization of 8000, 50 parts of BET surface area of ​​200m 2 / g of fumed silica AS-200, 5 parts have silanol groups at bo...

Embodiment 2

[0085] Prepare EPDM rubber reinforcing base material and vinyl silicone rubber reinforcing base material in the same manner as in Example 1; and 51 parts of EPDM rubber reinforcing base material and 108.5 parts by mass of vinyl silicone rubber reinforcing material The base material and 3 parts of ethylene-acrylate copolymer (VamacDP, DuPont, USA) were mixed in an internal mixer at 150° C. for 20 minutes, and the base material of the EPDM rubber composition was obtained after uniform mixing.

[0086] Add in 162.5 parts of EPDM composition base material prepared in this way:

[0087] 5 parts of ACP-W foaming agent (Hangzhou Haihong Fine Chemical Co., Ltd., a mixture of N,N-dinitrosopentamethylenetetramine, azodicarbonamide and foaming aids, with an average particle size of 9- 14 microns, outgassing volume 125-135ml / g, initial thermal decomposition temperature 125-133℃);

[0088] 0.4 parts of 1,1-di-tert-butylperoxy-3,3,5-trimethylcyclohexane (purity 95%) as component E1;

[00...

Embodiment 3

[0095] In addition to not using component (B), component A is 100 parts by mass, component (C) is changed to 40 parts of carbon black 774, silicone oil is changed to 1.0 parts of stearic acid, and 3 parts of zinc oxide. In addition, the organic peroxide E1 is adjusted from dibenzoyl peroxide to 1 part of 1,1-di-tert-butylperoxy-3,3,5-trimethylcyclohexane, and E2 is 1 part of 1,4-di-tert-butylperoxy The amount of cumene was adjusted to 5 parts and the blending process and the ethylene acrylate copolymer were omitted, and the EPDM foam material was prepared in the same manner as in Example 1, and its physical and mechanical property data are shown in Table 1.

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Abstract

The invention discloses a micropore EPDM foamed material with excellent compression resilience performance. The material is prepared from: by mass, 100-200 parts of ethylene-propylene-nonconjugated dialkene copolymer, 0-80 parts of vinylsiloxane rubber, 10-60 parts of inorganic nanoparticles, 0.5-15 parts of low temperature foaming agent and 0.5-10 parts of organic peroxide composition; wherein the nonconjugated dialkene is selected from ethylidene norbornene, hexadiene and isoprene, the mooney viscosity of the copolymer is not less than 20; the degree of polymerization of the vinylsiloxane rubber is not less than 1000 and the vinylsiloxane rubber contains at least two alkenyl groups connected with silicon atom; and organic peroxide composition includes two organic peroxides of which thermal degradation half-life for 1 min less than 155 DEG C and not less than 170 DEG C. The micropore EPDM foamed material with excellent compression resilience performance can be prepared according to the invention, the material has high mechanical strength, good appearance and uniform internal structure.

Description

technical field [0001] Embodiments of the present invention relate to the field of foam materials, and more specifically, embodiments of the present invention relate to a microporous EPDM foam material with excellent compression resilience and a preparation method thereof. Background technique [0002] EPDM rubber and its foam materials have excellent cold resistance and weather resistance. Because of their small specific gravity, they are easy to be formed into various shapes and have good characteristics of absorbing mechanical energy. They are widely used in transportation vehicles, sailing ships, various aircraft, Vibration isolation and sealing materials for high temperature equipment and instruments, building doors and windows. Due to its more excellent heat resistance and compression resilience properties, peroxide-cured EPDM foam materials are less dependent on equipment and have a wide range of applications, which has become a research hotspot in recent years. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L91/06C08L83/04C08L83/07C08L23/08C08K13/02C08K3/36C08K5/14C08K3/22C08J9/10
CPCC08L23/16C08J9/103C08J2203/04C08J2323/16C08J2491/06C08K2201/014C08L2203/14C08L2205/025C08L2205/035
Inventor 雷卫华陈立新罗世凯余凤湄周安伟曹君宋晏红周飞樊华
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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