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US 12,729,291 B2Granted
Compounds for treads and tyres comprising them
AssigneePirelli Tyre S.p.A.
InventorsJohn Nazareno House, Francesca Baione
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Abstract
The present invention relates to elastomeric compositions and compounds for tyres, in particular for tyre treads, comprising elastomeric polymers in specific ratios and having particular Tg values, tyre components and tyres for vehicle wheels which comprise them. These compounds find particular application in all-season tyres as they give them good maneuverability on snow, grip in the wet and advantageously limited wear of the tread.
Claims15
An elastomeric composition for tyre compounds comprising:
- 100 phr of a composition of elastomeric polymers (A) consisting of:
- (A1) from 35 phr to 65 phr of at least one isoprene polymer (IR) having a Tg ranging from −70° C. to −60° C.,
- (A2) from 15 phr to 45 phr of at least one styrene-butadiene polymer (SBR) having a Tg ranging from −70° C. to −55° C.,
- (A3) from 5 phr to 40 phr of at least one styrene-butadiene polymer (SBR) having a Tg ranging from −35° C. to −25° C.,
- from 5 phr to 25 phr of at least one resin (B),
- from 5 phr to 45 phr of at least one plasticising oil (C),
- at least 10 phr of at least one reinforcing filler (D), and
- at least 0.5 phr of the at least one vulcanising agent (E),
- wherein the total amount of plasticiser, including both the resin (B) and the oil (C), is from 25 phr to 55 phr.
6 more elements
Dependencies are inferred from the claim text.