US 12,275,848 B2
Belt using high performance cost-effective elastomeric material
Matthew Smith, Mooresville, NC (US); and Thomas George Burrowes, North Canton, OH (US)
Assigned to ContiTech Deutschland GmbH, Hannover (DE)
Filed by ContiTech Deutschland GmbH, Hannover (DE)
Filed on Jun. 21, 2023, as Appl. No. 18/338,441.
Prior Publication US 2024/0425684 A1, Dec. 26, 2024
Int. Cl. C08L 9/02 (2006.01); B60C 1/00 (2006.01); C08G 65/24 (2006.01); C08K 3/04 (2006.01); C08K 3/24 (2006.01); C08K 3/36 (2006.01)
CPC C08L 9/02 (2013.01) [B60C 1/00 (2013.01); C08K 3/04 (2013.01); C08K 3/36 (2013.01); C08L 2203/20 (2013.01)] 12 Claims
 
1. A timing belt comprising:
a belt body having an outer surface and an inner facing toothed surface and comprised of an elastomeric composition;
tensile members;
the elastomeric composition comprising:
from about 50 to 90 parts per hundred rubber of a zinc diacrylate modified hydrogenated acrylonitrile-butadiene rubber, and/or an unmodified hydrogenated acrylonitrile-butadiene rubber;
from about 10 to 50 parts per hundred rubber of a peroxide curable polyepichlorohydrin copolymer or terpolymer;
wherein the elastomeric composition is cured using a free radical promoting material, wherein the free radical promoting material is a peroxide selected from the group consisting of diacyl peroxides, peroxyesters, dialkyl peroxides and peroxyketals and is used in an amount from about 0.5 to 7 parts per hundred rubber, and
wherein the composition includes a peroxide co-agent is selected from the group consisting of 1, 2 polybutadienes, organic acrylates, organic methacrylates, metal salts of an alpha, beta-unsaturates organic acid and mixtures thereof, which is used in an amount from about 2 to about 10 parts per hundred rubber.