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A rubber compound, rubber technology, used in transportation and packaging, thin material handling, etc., can solve problems such as high hysteresis loss and poor dynamic behavior
Active Publication Date: 2016-06-22
EVONIK OPERATIONS GMBH
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[0006] A known drawback of organo(alkyl polyether silane)-containing rubber compounds is their poor dynamic behavior, including high hysteresis losses
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Embodiment 1
[0131] Example 1: Rubber Mixture
[0132] The main mixing specification (Main mixing specification) for the rubber mixture is listed in Table 1 below. The unit of phr used here is part by weight, based on 100 parts of crude rubber used.
[0133] A general method of producing rubber compounds and their vulcanizates is described in the "Rubber Technology Handbook", W. Hofmann, Hanser Verlag 1994.
[0134] Table 1: Main mixing methods
[0135]
[0136] polymer EPG5455 is an ethylene propylene diene rubber with medium degree of unsaturation (ENB content=4,3) containing 50 phr paraffin oil from Lanxess. Its Mooney viscosity (Mooney viscosity) (UML (1+4) 125° C.) is 46.
[0137] 7000GR is highly disperse silica from EvonikDegussa GmbH with a BET surface area of 170m 2 / g.
[0138] Lipoxol 4000 from Sasol is polyethylene glycol 4000, Sunpar 150 from Holly Corporation is paraffin oil, VulkacitMercaptoC from Lanxess is 2-mercaptobenzothiazole (MBT), PerkacitTBzTD (tetrabe...
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Abstract
The present invention relates to a rubber mixture comprising: (A) at least one rubber selected from the group consisting of ethylene-propylene-diene copolymer (EPDM), ethylene-propylene copolymer (EPM), neoprene (CR), Chlorinated polyethylene (CM), chloro-isobutylene-isoprene (chlorobutyl) rubber (CIIR), chlorosulfonylated polyethylene (CSM), ethylene-vinyl acetate copolymer (EAM), acrylic alkanes Base ester copolymer (ACM), polyester polyurethane (AU), polyether polyurethane (EU), bromo-isobutylene-isoprene (bromobutyl) rubber (BIIR), polychlorotrifluoroethylene (CFM ), isobutylene-isoprene rubber (butyl rubber, IIR), isobutylene rubber (IM), polyisoprene (IR), thermoplastic polyester polyurethane (YAU), thermoplastic polyether polyurethane (YEU), Silicone rubber (MQ), hydrogenated nitrile rubber (HNBR), nitrile rubber (NBR) or carboxylated nitrile rubber (XNBR) with methyl groups in the polymer chain, (B) at least one oxide filler, and (C) At least one silicon-containing azodicarbonamide having the structure of formula I: (R1)3-a(R2)aSi-RI-NH-C(O)-N=N-C(O)-NH-RI-Si( R1)3-a(R2)a(I). The rubber mixture is prepared by mixing at least one rubber, at least one oxide filler and at least one silicon-containing azodicarbonamide having the structure of formula I. The mixture can be used for shaped products.
Description
technical field [0001] The present invention relates to rubber mixtures, their preparation and use. Background technique [0002] DE102010003387.1 discloses the 3 -X 1 -C(O)-N=N-C(O)-X 1 -R 4 and (R 1 ) 3-a (R 2 ) a Si-R I -NH 2 A method for preparing silicon-containing azodicarbonamide by reaction. [0003] DE2704506 discloses the structure Y-X-CO-N=N-CO-X 1 - Compounds of Z and their use in rubber substances containing fillers. [0004] US20090234066A1 further discloses a compound with the structure A-CO-N=N-CO-Z-G, which is used in isoprene rubber together with sulfur-containing silane. [0005] US20090186961 discloses substances having the structure A-CO-N=N-CO-Z-G for use in isoprene rubber together with coating agents. [0006] A disadvantage of known organo(alkyl polyether silane)-containing rubber mixtures is their poor dynamic behavior, including high hysteresis losses. Contents of the invention [0007] It is an object of the present invention to pr...
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