Elastomeric composition useful as tire treads
OwnerMichele Bortolotti, Gian Tommaso Viola +2inventors
InventorsMICHELE BORTOLOTTI, GIAN TOMMASO VIOLA, SONIA BUSETTI, FERRUCCIO MISTRALI
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Abstract
Elastomeric composition vulcanizable with sulfur useful for the preparation of tyre treads which comprises: a) 100 parts of elastomeric mixture comprising from 20 to 100% by weight of an elastomer deriving from the polymerization of a monovinylarene with a conjugated diene, preferably a styrene-butadiene copolymer, the complement to 100 being selected from natural rubber, polybutadiene and other diolefin elastomers; b) from 10 to 150 parts of silica per 100 parts of (a); c) from 0 to 150 parts of carbon black per 100 parts of (a); characterized in that the elastomeric mixture (a) has an epoxidation degree from 0.7 to 8.0%.
Claims16
Elastomeric composition vulcanizable with sulfur and/or sulfur donators useful for the preparation of tyre treads which comprises:
- a) 100 parts of an elastomeric mixture comprising from 20 to 100% by weight of an elastomer deriving from the polymerization of a monovinylarene with a conjugated diene, the complement to 100 being selected from natural rubber, polybutadiene and other diolefin elastomers;
- b) from 10 to 150 parts of silica per 100 parts of (a);
- c) from 0 to 150 parts of carbon black per 100 parts of (a);
- characterized in that the elastomeric mixture (a) has an epoxidation degree, defined by the number of moles of epoxidated double bonds with respect to the initial number of moles of diene double bonds, of between 0.7 and 8.0%.
Elastomeric composition vulcanizable with sulfur and/or sulfur donors useful for the production of tyre treads which comprises:
- a) 100 parts of an elastomeric mixture comprising from 20 to 100% by weight, preferably from 40 to 100% by weight, of an elastomer deriving from the polymerization of a monovinylarene with a conjugated diene, preferably a styrene-butadiene copolymer, the complement to 100 being selected from natural rubber, polybutadiene and other diolefin elastomers;
- the elastomer (a) having an epoxidation degree of between 0.7 and 8%, preferably between 1.5 and 6.0%;
- b) from 10 to 150, preferably from 10 to 80, even more preferably from 30 to 60, parts of silica per 100 parts of (a);
- c) from 0 to 150, preferably from 2 to 50, even more preferably from 3 to 30, parts of carbon black per 100 parts of (a);
- d) from 0.2 to 15 phr of a coupling agent having general formula (I) Y3—Si—CnH2nA, wherein Y is an alkoxide group having from 1 to 4 carbon atoms or a chlorine atom, n is an integer from 1 to 6;
- A is selected from —SmCnH2nSi—Y3, —X and SmZ, wherein X is selected from a nitrous, mercapto, amino, epoxy, vinyl, imide, chlorine group, Z is selected from
- 4
- m is an integer from 1 to 6, Y is as defined above.
Dependencies are inferred from the claim text.