# US 2019/0315898 A1 · Power transmission belt > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0315898 A1 - Document ID: US20190315898A1 - Status: Published application - Kind: A1 - Application number: 16/466,528 - Filed: 2017-12-05 - Published: 2019-10-17 - Earliest claimed: 2016-12-05 - Assignees: Dayco Europe S.R.L.; Arlanxeo Deutschland GmbH - Applicants: Dayco Europe S.R.L.; Arlanxeo Deutschland GmbH - Inventors: Giacomo Casagrande; Ivonne Lucchese; Marco Di Meco; Massimiliano Delli Rocioli; Alessandro D'Auria - Web page: https://patentgrep.com/patent/US20190315898A1 ## CPC - C08C 19/02: Hydrogenation - C08F 236/12: with nitriles - C08K 7/14: Glass - F16G 1/08: with reinforcement bonded by the rubber - F16G 1/28: with a contact surface of special shape, e.g. toothed - F16H 57/0475: {Engine and gearing, i.e. joint lubrication or cooling or heating thereof} - C08F 236/06: Butadiene - C08F 2800/20: as weight or mass percentages - C08C: TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - F16G: BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR - F16H: GEARING ## Abstract Power transmission belts have a hydrogenated nitrile-butadiene-PEG acrylate copolymer of 25% to 38% by weight by weight of at least one α,β-ethylenically unsaturated nitrile unit, 40% to 60% by weight by weight of at least one conjugated diene unit and 10% to 25% by weight by weight of at least one PEG acrylate unit derived from a PEG acrylate of the general formula (I) where R is hydrogen or branched or unbranched C1-C20-alkyl, preferably methyl, ethyl, butyl or ethylhexyl, n is 1 to 8, preferably 2 to 8, more preferably 2 to 5 and most preferably 3 and R1 is hydrogen or CH3-, where the hydrogenated nitrile-butadiene-PEG acrylate copolymer, if n is 1, does not contain any further copolymerizable monomer unit having a free carboxylic acid group. ## Claims ### Claim 1 A power transmission belt comprising: a hydrogenated nitrile-butadiene-PEG acrylate copolymer comprising: a) 25% to 38% by weight by weight of at least one α,β-ethylenically unsaturated nitrile unit, b) 40% to 60% by weight by weight of at least one conjugated diene unit, and c) 10% to 25% by weight by weight of at least one PEG acrylate unit derived from a PEG acrylate of the general formula (I) where R is hydrogen or branched or unbranched C1-C20-alkyl, preferably methyl, ethyl, butyl or ethylhexyl, n is 1 to 8, preferably 2 to 8, more preferably 2 to 5 and most preferably 3 and R1 is hydrogen or CH3-, where the hydrogenated nitrile-butadiene-PEG acrylate copolymer, if n is 1, does not contain any further copolymerizable monomer unit having a free carboxylic acid group. ### Claim 2 (depends on 1) The power transmission belt according to claim 1, wherein the nitrile units (a) are 29% to 33% by weight. ### Claim 3 (depends on 1) The power transmission belt according to claim 1, wherein the α,β-ethylenically unsaturated nitrile units (a) is acrylonitrile, methacrylonitrile, ethacrylonitrile or a mixtures thereof. ### Claim 4 (depends on 1) The power transmission belt according to claim 1, wherein the conjugated diene units (b) are 1,3-butadiene, isoprene, 2,3-dimethylbutadiene, 1,3-pentadiene (piperylene) or mixtures thereof. ### Claim 5 (depends on 1) The power transmission belt according to claim 1, wherein the PEG acrylate unit (c) is methoxy, ethoxy, butoxy or ethylhexoxy polyethylene glycol (meth)acrylate having 2 to 8 repeat ethylene glycol units. ### Claim 6 (depends on 1) The power transmission belt according to claim 1, wherein the level of hydrogenation of the conjugated diene units (b) is more than 50%. ### Claim 7 (depends on 1) The power transmission belt according to claim 1, wherein the hydrogenated nitrile-butadiene-PEG acrylate copolymer is within the mixture forming the body of the power transmission belt. ### Claim 8 (depends on 1) The power transmission belt according to claim 1, wherein hydrogenated nitrile-butadiene-PEG acrylate copolymer is constituted by more than 50% by weight, calculated on the total weight of elastomer of the mixture forming the body of the power transmission belt. ### Claim 9 (depends on 1) The power transmission belt according to claim 1, wherein said material is loaded with fibres in a quantity of between 1% and 50% by weight of the total non-elastomeric material. ### Claim 10 (depends on 1) The power transmission belt according to claim 1, wherein the power transmission belt is a toothed power transmission belt. ### Claim 11 (depends on 1) An assembly comprising an engine, a power transmission belt according to claim 1, and oil lubricating the engine; wherein, during operation of the engine, the oil continuously contacts the power transmission belt. ### Claim 12 (depends on 1) A system comprising a power transmission belt according to claim 1 and oil, wherein said power transmission belt is in direct contact with oil or is partially immersed in oil. ### Claim 13 (depends on 1) The power transmission belt according to claim 1, wherein the hydrogenated nitrile-butadiene-PEG acrylate copolymer comprises 27% to 37% by weight by weight of at least one α,β-ethylenically unsaturated nitrile unit, 42% to 58% by weight by weight of at least one conjugated diene unit, and 11% to 22% by weight by weight of at least one PEG acrylate unit derived from a PEG acrylate of the general formula (I). ### Claim 14 (depends on 1) The power transmission belt according to claim 1, wherein the hydrogenated nitrile-butadiene-PEG acrylate copolymer comprises 29% to 36% by weight of at least one α,β-ethylenically unsaturated nitrile unit, 44% to 59% by weight of at least one conjugated diene unit, and 12% to 20% by weight of at least one PEG acrylate unit derived from a PEG acrylate of the general formula (I). ### Claim 15 (depends on 3) The power transmission belt according to claim 3, wherein the α,β-ethylenically unsaturated nitrile units (a) is acrylonitrile. ### Claim 16 (depends on 4) The power transmission belt according to claim 4, wherein the conjugated diene units (b) are 1,3-butadiene. ### Claim 17 (depends on 5) The power transmission belt according to claim 5, wherein the PEG acrylate unit (c) is methoxy or ethoxy polyethylene glycol (meth)acrylate having 2 to 5 repeat ethylene glycol units. ### Claim 18 (depends on 5) The power transmission belt according to claim 5, wherein the PEG acrylate unit (c) is methoxy or ethoxy polyethylene glycol (meth)acrylate having 3 repeat ethylene glycol units. ### Claim 19 (depends on 6) The power transmission belt according to claim 6, wherein the level of hydrogenation of the conjugated diene units (b) is 90% or more. ### Claim 20 (depends on 6) The power transmission belt according to claim 6, wherein the level of hydrogenation of the conjugated diene units (b) is 99% or more.