Soundproof tyre for vehicle wheels
OwnerAntonio Susanna, Raffaella Donetti +2inventors
InventorsAntonio Susanna, Raffaella Donetti, Antonio Monterosso, Thomas Hanel
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Abstract
The present invention relates to a soundproof tyre for vehicle wheels comprising a noise reducing element made by vulcanising a vulcanisable and expandable elastomeric compound comprising at least one elastomeric polymer, at least one expanding agent, and at least one compound selected from the group of (i) fatty acid amides and (ii) polymers and copolymers of caprolactone, lactic acid, glycolic acid, and mixtures thereof.
Claims18
A soundproof tyre for vehicle wheel comprising:
- a carcass structure;
- a tread band in a radially outer position with respect to the carcass structure;
- a vulcanised layer of airtight elastomeric compound (liner), disposed in a radially inner position with respect to the carcass structure;
- and
- a noise reducing element made of foamed elastomeric material disposed in a radially inner position with respect to the vulcanised layer of airtight elastomeric compound and axially extending at least at a part of the tread band;
- wherein the foamed elastomeric material comprises, before vulcanization, a vulcanisable and foamable elastomeric compound comprising, before mixing, an elastomeric composition comprising:
- (i) 100 phr of at least one natural or synthetic elastomeric polymer,
- (ii) from 10 phr to 80 phr of at least one reinforcing filler,
- (iii) less than 3 phr of at least one vulcanising agent,
- (iv) from 5 phr to 30 phr of at least one expanding agent,
- (v) from 5 phr to 40 phr of at least one compound chosen from fatty acid amides, and
- (vi) from phr 1 to 20 phr of at least one compound chosen from polymers and copolymers of caprolactone, lactic acid, glycolic acid, and mixtures thereof.
A vulcanisable and foamable elastomeric compound comprising, before mixing, an elastomeric composition comprising:
- (i) 100 phr of at least one natural or synthetic elastomeric polymer,
- (ii) from 10 phr to 80 phr of at least one reinforcing filler,
- (iii) less than 3 phr of at least one vulcanising agent,
- (iv) from 5 phr to 30 phr of at least one expanding agent, and
- (v) from 5 phr to 40 phr of at least one compound chosen from fatty acid amides, and
- (vi) from 1 phr to 20 phr of at least one compound chosen from polymers and copolymers of caprolactone, lactic acid, glycolic acid, and mixtures thereof.
Dependencies are inferred from the claim text.