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

A technology of EPDM rubber and low density, which is applied in the field of low-density EPDM rubber extruded sponge material and its preparation, which can solve the problems of high specific gravity, unsuitability, and high viscosity of EPDM sponge, and achieve stiffness Good, prevent sudden decomposition, fast vulcanization effect

Pending Publication Date: 2020-06-23
JIANGYIN HAIDA RUBBER & PLASTIC GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0037] A low-density EPDM extruded sponge material, prepared from the following raw materials in parts by weight: 100 parts of EPDM rubber, 30 parts of carbon black, 30 parts of paraffin oil, 150 parts of inorganic filler, and 1.5 parts of sulfur , 30 parts of azodicarbonamide, 5 parts of vulcanization accelerator, 5 parts of active zinc oxide, 2 parts of stearic acid, and 5 parts of calcium oxide.

[0038] Among them, the ethylene content of EPDM rubber is 40-55%, the Mooney viscosity is 60-73, and the third monomer ENB content is 7-10%.

[0039] The inorganic filler is a mixture of talcum powder, calcium carbonate and kaolin, and the mass ratio of the three is 4:1:1.

[0040] The vulcanization accelerator is 1.2 parts of 2-mercaptobenzothiazole, 1 part of dithiodibenzothiazole, 0.5 part of zinc dibutyldithiocarbamate, 0.5 part of zinc dimethyldithiocarbamate, 0.3 part of bispentamethylenethiuram sulfide, 0.2 part of tellurium diethyldithiocarbamate, 0.3 part of diphenylguan...

Embodiment 2

[0047] A low-density EPDM rubber extruded sponge material, prepared from the following raw materials in parts by weight: 100 parts of EPDM rubber, 30 parts of carbon black, 30 parts of paraffin oil, 100 parts of inorganic filler, and 1.5 parts of sulfur , 30 parts of azodicarbonamide, 5 parts of vulcanization accelerator, 5 parts of active zinc oxide, 2 parts of stearic acid, and 5 parts of calcium oxide.

[0048] The ethylene content of EPDM rubber is 40-55%, the Mooney viscosity (ML(1+4)125°C) is 60-73, and the third monomer ENB content is 7-10%.

[0049]The inorganic filler is a mixture of talcum powder, calcium carbonate and kaolin, and the mass ratio of the three is 4:1:1.

[0050] The vulcanization accelerator is 1.2 parts of 2-mercaptobenzothiazole, 1 part of dithiodibenzothiazole, 0.5 part of zinc dibutyldithiocarbamate, 0.5 part of zinc dimethyldithiocarbamate, 0.3 part of bispentamethylenethiuram sulfide, 0.2 part of tellurium diethyldithiocarbamate, 0.3 part of dip...

Embodiment 3

[0057] A low-density EPDM rubber extruded sponge material, prepared from the following raw materials in parts by weight: 100 parts of EPDM rubber, 30 parts of carbon black, 30 parts of paraffin oil, 170 parts of inorganic filler, and 1.5 parts of sulfur , 30 parts of azodicarbonamide, 7 parts of vulcanization accelerator, 7 parts of active zinc oxide, 2 parts of stearic acid, and 5 parts of calcium oxide.

[0058] The ethylene content of EPDM rubber is 40-55%, the Mooney viscosity (ML(1+4)125°C) is 60-73, and the third monomer ENB content is 7-10%.

[0059] The inorganic filler is a mixture of talcum powder, calcium carbonate and kaolin, and the mass ratio of the three is 4:1:1.

[0060] The vulcanization accelerator is 1.2 parts of 2-mercaptobenzothiazole, 1 part of dithiodibenzothiazole, 1 part of zinc dibutyldithiocarbamate, 1 part of zinc dimethyldithiocarbamate, 0.5 parts of bispentamethylenethiuram sulfide, 0.5 parts of tellurium diethyldithiocarbamate, 0.3 parts of dip...

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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 insulation materials, and specifically relates to a low-density EPDM rubber extruded sponge material and a preparation method thereof. Background technique [0002] Sponge sealing insulation materials are widely used in automobile sealing materials and metal pipe insulation materials due to their low density, light weight, and good thermal insulation properties. Commonly used rubber and plastic sponge insulation materials are mostly nitrile rubber (NBR) and polyvinyl chloride (PVC) rubber and plastic blends. This rubber and plastic sponge material has the characteristics of softness, good flexural resistance and flame retardant properties. However, the brittleness temperature of NBR is -10~-20℃, while the brittleness temperature of ethylene propylene diene rubber (EPDM) is -40~-60℃. Its cold resistance is much better than that of NBR. At the same time, EPDM has better ozone aging resistance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08K13/02C08K3/34C08K3/26C08K3/06C08K5/47C08K5/39C08K5/40C08K5/31C08K5/378C08J9/10
CPCC08J9/103C08J9/0095C08J9/0066C08J9/0023C08J9/0033C08J9/0028C08J2203/04C08J2323/16
Inventor 王海威庄澎胡斌赵晓平贡健
Owner JIANGYIN HAIDA RUBBER & PLASTIC GROUP
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