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Environment-friendly peroxy-vulcanized EPDM material suitable for automatic demolding and preparation method of environment-friendly peroxy-vulcanized EPDM material

A peroxy vulcanizing agent and peroxygen technology, applied in the rubber field, can solve the problems of poor release effect and difficult demoulding, and achieve the effects of low cost, increased vulcanization speed, and improved release performance.

Inactive Publication Date: 2022-05-10
XIAMEN MAIHUA RUBBER PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the EPDM environment-friendly peroxygen formula, first of all, due to the environmental protection requirements (suitable for drinking water), peroxygen vulcanized EPDM materials cannot add too many auxiliary ingredients, and because the release effect of peroxygen vulcanization itself is not as good as that of sulfur vulcanization Rubber material, making it difficult to demould EPDM peroxygen-cured products has become an industry problem

Method used

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  • Environment-friendly peroxy-vulcanized EPDM material suitable for automatic demolding and preparation method of environment-friendly peroxy-vulcanized EPDM material

Examples

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preparation example Construction

[0026] The preparation method comprises the following steps:

[0027] Step 1: first put EPDM rubber and peroxygen cross-linking agent butadiene rubber BR9000 into the internal mixer, refine to 80 degrees, and then add other raw materials except peroxygen vulcanizing agent BIBP for mixing, mixing To about 130 degrees to get a uniform masterbatch;

[0028] Step 2: After the masterbatch is left to cool, add the peroxycuring agent BIBP (1.5-3 parts by weight) in proportion and mix it to 85 degrees before unloading, and then import it into an open mill to knead the tablets, and get the final product after cooling. rubber mixing film;

[0029] Step 3: The final compounded rubber film is vulcanized to form a product, and the mold is demoulded;

[0030] Step 4: The molded product is subjected to secondary vulcanization at 150 degrees for 4 hours.

[0031] In the above step 1, the rubber mixing temperature is controlled below 130° C., and the mixing time is 10-12 minutes.

[0032] Be...

Embodiment 1

[0037] Embodiment 1 of the present invention provides a kind of environment-friendly peroxide vulcanized EPDM (ethylene-propylene-diene rubber) material suitable for automatic demoulding, calculated as 100 parts by weight of raw rubber (all the other ratios are relative to the weight of raw rubber) parts), including the following raw materials by weight: EPDM rubber 100 parts, carbon black N550 35 parts, carbon black N774 45 parts, clay N85 15 parts, polyisobutylene 15 parts, zinc oxide 3 parts, stearic acid 0.5 parts , 0.7 parts of anti-aging agent SP-P, 2 parts of peroxy vulcanizing agent BIBP, 10 parts of peroxygen cross-linking agent butadiene rubber BR9000.

[0038] The EPDM rubber is K2650C of Allanxeo;

[0039] Described carbon black N550 / N774 is the SPSO / N774 of Cabot;

[0040] Described potter's clay N85 is the product N85 of Hoffmann;

[0041] The polyisobutylene is H-100 of INEOS;

[0042] The zinc oxide is Taimao's AZO-805;

[0043] Described stearic acid is pr...

Embodiment 2

[0052] The difference between this embodiment and Example 1 is that the raw materials are formulated according to the following proportions: 100 parts of EPDM rubber, 40 parts of carbon black N550, 50 parts of carbon black N774, 20 parts of pottery clay, 20 parts of polyisobutylene, 5 parts of zinc oxide 1 part, 1 part of stearic acid, 0.8 parts of anti-aging agent SP-P, 3 parts of peroxide BIBP, 15 parts of butadiene rubber BR9000.

[0053] The demoulding effect of the product in this embodiment is ideal. The product obtained after secondary sulfur addition can meet the requirements of water-related applications.

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Abstract

The environment-friendly peroxy-vulcanized EPDM material suitable for automatic demolding comprises the following raw materials in parts by weight based on 100 parts of raw rubber: 90-105 parts of ethylene propylene diene monomer rubber; the rubber composition is prepared from the following components in parts by weight: 30 to 40 parts of carbon black N550, 40 to 50 parts of carbon black N774, 10 to 20 parts of argil N85, 10 to 30 parts of polyisobutene, 2 to 5 parts of zinc oxide, 0.5 to 2 parts of stearic acid, 0.6 to 0.8 part of anti-aging agent SP-P, 1.5 to 3 parts of peroxy vulcanizing agent BIBP and 5 to 15 parts of peroxy assistant crosslinking agent cis-butadiene rubber BR9000. The release effect of the EPDM peroxy vulcanization formula can be greatly improved under the condition that no auxiliary agent is added, the release agent is suitable for automatic production, and the raw material cost can be reduced to a certain extent.

Description

technical field [0001] The invention relates to the field of rubber, in particular to an environment-friendly peroxygen vulcanized EPDM material suitable for automatic demoulding and a preparation method thereof. Background technique [0002] At present, in the production process of domestic rubber factories, some daily life products are often encountered, which need to meet the requirements of NSF and sealing products that meet the requirements of drinking water or food contact in various countries. However, due to the limitations of migratory substances, VOC, VOM and oxygen consumption, most of these products need to use peroxy vulcanization system, and sulfur vulcanization system cannot be used. However, most EPDM materials using peroxygen vulcanization will encounter problems such as mold sticking and long vulcanization time. And because it relates to drinking water and food, the use of some internal release agents and external release agents has been greatly restricted...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L9/00C08K5/14C08K3/04C08K3/34
CPCC08L23/16C08K2201/014C08L2201/08C08L9/00C08K5/14C08K3/04C08K3/346
Inventor 施圣标郑贤志姜远桃
Owner XIAMEN MAIHUA RUBBER PROD CO LTD
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