US 12,331,197 B2
Power transmission belt
Marco Di Meco, Chieti (IT); Fabio Nardone, Chieti (IT); and Domenico Parziale, Chieti (IT)
Assigned to DAYCO EUROPE S.R.L., Chieti (IT)
Appl. No. 18/563,445
Filed by DAYCO EUROPE S.R.L., Chieti (IT)
PCT Filed May 23, 2022, PCT No. PCT/IB2022/054799
§ 371(c)(1), (2) Date Nov. 22, 2023,
PCT Pub. No. WO2022/249027, PCT Pub. Date Dec. 1, 2022.
Claims priority of application No. 102021000013373 (IT), filed on May 24, 2021.
Prior Publication US 2024/0287292 A1, Aug. 29, 2024
Int. Cl. C08L 9/02 (2006.01); F16G 1/28 (2006.01)
CPC C08L 9/02 (2013.01) [F16G 1/28 (2013.01); C08L 2312/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A power transmission belt comprising:
a nitrile group-containing copolymer rubber comprising an acrylonitrile unit (a), a monomer unit (b) of α,β-ethylenically unsaturated nitrile monomer other than acrylonitrile, and a conjugated diene monomer unit (c) and having an iodine value of 120 or less, with the proviso that the conjugated diene monomer unit (c) does not include isoprene;
wherein a content of the total of the acrylonitrile unit (a) and the monomer unit (b) of α,β-ethylenically unsaturated nitrile monomer other than acrylonitrile is 1 to 50% by weight in the total monomer unit, and a content ratio of the acrylonitrile unit (a) and the monomer unit (b) of α,β-ethylenically unsaturated nitrile monomer other than acrylonitrile is 10:90 to 90:10 in a weight ratio of “content of acrylonitrile unit (a):content of monomer unit (b) of α,β-ethylenically unsaturated nitrile monomer other than acrylonitrile”.