Closed-cell EPDM (ethylene-propylene-diene monomer) rubber foam and preparation method thereof

Abstract

The invention discloses a closed-cell EPDM (ethylene-propylene-diene monomer) rubber foam which is prepared from the following components in parts by weight: 14 parts of butyl rubber, 25 parts of EPDM rubber, 2.5 parts of resin, 8 parts of wax oil, 2.2 parts of accelerator NA-22, 26 parts of kaolin, 1.35 parts of zinc oxide, 1.3 parts of stearic acid SA 1800, 1.3 parts of flame retardant 8010, 0.3 part of foaming agent AC-1000, 5 parts of foaming agent AC-5000, 2.4 parts of carbon black N660, 1.5 parts of antimony trioxide, 0.58 part of accelerator TMTM, 1.1 parts of accelerator ZDC, 0.8 part of accelerator M, 0.3 part of vulcanizing agent, 0.4 part of microporous foaming agent and 1.35 parts of foaming agent CX-A. The product disclosed by the invention has the advantages of portability, high toughness, low thermal conductivity, excellent thermal insulation property, independent bubble structure, very low water absorptivity, excellent impact resistance and excellent weather resistance, and can be used as a cushioning material. The method disclosed by the invention has the advantages of simple processing steps and favorable effect, is easy to implement, can prepare products with stable quality, can effectively enhance the production efficiency and can lower the cost.

Description

technical field [0001] The invention relates to foam, in particular to a closed-cell EPDM rubber foam and a preparation method thereof. Background technique [0002] Ethylene-propylene-diene rubber (EPDM) is a synthetic rubber developed rapidly in recent years. The third monomer for EPDM rubber includes ethylidene norbornene (ENB), dicyclopentadiene (DCPD) and 1,4-hexadiene (HI)), and ENB and DCPD are commonly used. Since the main chain of the molecular chain is non-polar and saturated, EPDM not only has good high temperature resistance and ozone resistance, but also has excellent electrical insulation and solvent resistance. The above characteristics of EPDM broaden the application fields of EPDM, such as thermoplastic materials, electrical insulation materials, waterproof membranes, automobiles and sealing strips widely used in the construction industry. [0003] Because EPDM rubber has so many characteristics, the industry is committed to the development of EPDM rubber...

AI Technical Summary

Problems solved by technology

However, although the strength of EPDM can be improved after adding carbon black, the fluidity of the compound will decrease (the Mooney viscosity value will increase), and the electrical properties of the vulcanizate (such as dielectric strength and volume resistivity) will also decrease.