Ethylene propylene diene terpolymer sponge rubber and preparation method thereof
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A technology of EPDM rubber and sponge rubber, which is applied in the field of EPDM sponge rubber and its preparation, to achieve the effect of uniform cells, low density, and simple and easy preparation method
Active Publication Date: 2012-01-25
JINGDONG RUBBER
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Traditional sponge rubber sealing strips do not have this function
Method used
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Embodiment 1
[0030] The EPDM sponge rubber described in this embodiment is composed of an EPDM rubber matrix, a foaming agent, a filling reinforcing agent, related vulcanizing agents and vulcanization assistants. As the filling and reinforcing agent, molecular sieve powder is used instead of talc powder and active calcium as the filling and reinforcing system, and the porous structure of molecular sieve powder is used to distribute the cells of the sponge rubber evenly, and to make the sponge rubber product described in this embodiment have a hygroscopic function.
[0031] In this example, the vulcanization system is composed of sulfur, M, TMTD, PZ, BZ, and DPTT, the filler is composed of carbon black and molecular sieve, and the foaming system is composed of foaming agent OBSH. The specific formula is shown in Table 1.
[0032] Table 1
[0033] name Content / phr name Content / phr EPDM 100 TMTD 1 stearic acid 3 M 0.8 Calcium Oxide 5 PZ 0.5 Zinc...
Embodiment 2
[0040] In this example, the difference from Example 1 is that the content of the accelerator has changed, and the specific formula is shown in Table 2.
[0043] The performance test results of the EPDM sponge rubber obtained in this embodiment are shown in Table 16.
Embodiment 3
[0045] In this example, the difference from Example 1 is that the content of the accelerator has changed, and the specific formula is shown in Table 3.
[0048] The performance test results of the EPDM sponge rubber obtained in this embodiment are shown in Table 16.
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Abstract
The invention provides an ethylene propylene diene terpolymer sponge rubber and a preparation method thereof, relating to a rubber and a preparation method thereof. The ethylene propylene diene terpolymer sponge rubber is prepared from ethylene propylene diene terpolymer, a foaming agent, a filling enhancer, a plasticizer, molecular sieve powder with a hygroscopic effect, a vulcanizing agent and a vulcanizing aid. The ethylene propylene diene terpolymer sponge rubber is characterized in that the molecular sieve powder is used for replacing traditional talc powder or calcium carbonate to be used as a filling agent, a foaming agent azobisformamide (AC) and a foaming agent 4,4'-oxy bis(benzenesulfonyl hydrazide) (OBSH) are combined and matched with an accelerant, and the decomposing rate of the foaming agent and the vulcanizing rate of the ethylene propylene diene terpolymer are matched, thus a microporous sponge rubber sealing product with a hygroscopic function is prepared under die pressing vulcanization conditions. The tensile strength, elongation percentage, stress at definite elongation, compression set and other indexes of the ethylene propylene diene terpolymer sponge rubber can meet the use performance requirements of sponge sealing strips; and at the same time, the sponge rubber has uniform foam pores, small density and hygroscopic function.
Description
technical field [0001] The invention relates to a rubber and a preparation method thereof, in particular to a EPDM sponge rubber and a preparation method thereof. Background technique [0002] The production of microporous elastomer materials includes the use of latex liquid mixture to make sponge foam materials and the use of organic foaming agents to thermally decompose to make sponge foam materials. US Patent No. 3300421 (US Patent 3300421, 1967) discloses a polymer material with a microporous structure that can be used to make padding materials and packaging materials with high resilience. The microporous structure material described in this invention patent is obtained from latex foam or elastic polyurethane foam as raw materials. Japanese Patent Application Laid-Open No. 2002-179825 discloses a method for making sponge rubber. This invention patent produces EPDM foam rubber by adding a foaming agent to the rubber material, making it foam and crosslinking it with an o...
Claims
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