Low-density ethylene propylene diene monomer extruded sponge material and preparation method thereof

Abstract

The invention relates to a low-density ethylene propylene diene monomer extruded sponge material and a preparation method thereof. The sponge material disclosed by the invention is prepared from the following components in parts by weight: 100 parts of raw rubber matrix, 20-50 parts of carbon black; 50-100 parts of a plasticizer, 100-200 parts of an inorganic filler, 1-3 parts of a vulcanizing agent, 15-30 parts of a blowing agent, 5-10 parts of a vulcanization accelerator, 5-10 parts of an activator, 5-10 parts of calcium oxide; wherein the raw rubber matrix is ethylene propylene diene monomer rubber, the ethylene content of the raw rubber matrix is 40-55%, the Mooney viscosity (ML(1 + 4)125 DEG C) of the raw rubber matrix is 40-80, and the content of a third monomer ENB of the raw rubbermatrix is 7-10%. The low-density ethylene propylene diene monomer extruded sponge material has the advantages of light density, smooth surface, excellent weather resistance, ozone resistance and coldresistance, the preparation method is simple and convenient to operate and low in cost, and the sponge material can be applied to the fields of pipeline or building insulation, fitness products and the like.

Description

technical field [0001] The invention belongs to the technical field of sponge sealing and thermal insulation materials, and in particular relates to a low-density EPDM extruded sponge material and a preparation method thereof. Background technique [0002] Sponge sealing insulation materials are widely used in automotive sealing materials and metal pipe insulation materials due to their low density, light weight, and good thermal insulation properties. Commonly used rubber-plastic sponge insulation materials are mostly nitrile rubber (NBR) and polyvinyl chloride (PVC) rubber-plastic blends. The rubber-plastic sponge material has the characteristics of softness, good flex resistance and flame retardancy. However, the brittle temperature of NBR is -10~-20°C, while the brittle temperature of EPDM is -40~-60°C, and its cold resistance is much better than that of NBR. At the same time, EPDM has ozone aging resistance, weather resistance and acid resistance. Alkalinity is better ...

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Problems solved by technology

[0003] However, the surface density of commonly used EPDM sponge materials is generally 0.5-0.7g / cm -3 , generally used in automotive sealing and other fields, but the surface density is 0.5-0.7g / cm -3 The EPDM sponge is not suitable for use in pipes or building insulation, fitness products, etc. due to its high specific gravity.

[0004] Chinese patent CN 109651642A discloses a kind of water-stop sponge rubber material and its preparation method, sealing strip and its preparation method and automobile, and its water-stop sponge rubber material adopts EPDM rubber V8600 and terpene resin, brominated butyl rubber and The combined use of AC foaming agent can obtain a low-density, low-damping, high-viscosity rubber compound, which can make it have good water-stop performance, and can be well used in sealing strip products to improve the use of sealing strips Quality; but the prepared waterproof sponge rubber density is 0.3-0.6 g / cm -3 , high specific gravity, not suitable for pipeline or building insulation, fitness products and other fields

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