ES316660A1 - A procedure for preparing vulcanises equipped with high mechanical properties. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

A process for preparing vulcanizates endowed with high mechanical properties, based on vulcanizable compositions comprising an elastomeric polymer, chosen from the group including the saturated and amorphous copolymers of ethylene with an alpha-olefin and the terpolymers of low ethylene unsaturation with a alpha-olefin and a cyclic or acyclic polyene provided with non-conjugated double bonds, plus a reinforcing filler and vulcanizing agents constituted by a free radical generator and a free radical acceptor, characterized in that an ether is used as free radical generator peroxidic of the following general formula: ** (See formula) ** O well ** (See formula) ** where R1 is hydrogen, an alkyl or cycloalkyl group with at most 10 carbon atoms and possibly substituted by halogens, or an aryl group, possibly substituted by alkyl or halogen, containing at most 10 carbon atoms, R 2 is an alkyl or cycloalkyl group with at most 10 carbon atoms and possibly substituted by halogens, or an aryl group, possibly substituted by alkyl or halogen, containing at most 10 carbon atoms, with R 1 and R 2, together with the central carbon atom, also forming a cycloaliphatic ring, R3 is an alkyl, cycloalkyl, aryl or arylalkyl group having at most 10 carbon atoms and possibly substituted by alkyl or halogen, R4 is an alkyl group or a tertiary arylalkyl group, possibly substituted by alkyl or halogen and containing at most 10 carbon atoms, R2 and R4 also being able to be represented, not simultaneously, by R2 equal to a group of the general formula ** (See formula) ** where R11 is an alkylene, cycloalkylenic, alkenylenic, alkynylenic or arylenic group, possibly substituted by alkyl or halogen, containing at most 10 carbon atoms, while R1, R3 and R4 have the meaning set forth above, and by R4, respectively, as a group of the general formula ** (See formula) ** where R1, R2 and R11 and have the meaning set forth above and R12 is equal to R4 as defined above. R6 and R8 are taken from the group comprising hydrogen, alkyl or cycloalkyl radicals with at most 10 carbon atoms and possibly substituted by halogens, or aryl radicals, possibly substituted by alkyl or halogen, containing at most 10 carbon atoms, R7 and R9 are alkyl or cycloalkyl groups containing at most 10 carbon atoms and possibly substituted by halogens, or aryl groups, possibly substituted by alkyl or halogen, R5 and R10 are alkyl, cycloalkyl, aryl or arylalkyl groups, with at most 10 carbon atoms and possibly substituted by halogen or alkyl, and, finally, R6 and R7 and/or R8 and R9 can form a cycloaliphatic ring with the carbon atom to which they are linked, and the entire mixture is vulcanized at a temperature comprised between 110º and 220º C, and preferably between 140º and 180º C. (Machine-translation by Google Translate, not legally binding)