Thermoplastic elastomer composition
AssigneeSumitomo Chemical Company, Limited
InventorsKenji Manabe, Masahiro Niwano, Tadashi Hikasa
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Abstract
The present invention provides a thermoplastic elastomer composition having high thermal resistance. It comprises a thermoplastic graft copolymer of which main chain is constituted by a polymer having a glass transition temperature of 10.degree. C. or blow and side chain is constituted by an aromatic oligomer having a flow temperature of 100.degree. C. or above, and an olefinic polymer.
Claims11
A thermoplastic elastomer composition comprising a thermoplastic graft copolymer of which main chain is constituted by a polymer having a glass transition temperature of 10.degree. C. or below and side chain is constituted by an aromatic oligomer having a flow temperature between 100.degree. C. and 400.degree. C., and an olefinic polymer wherein the flow temperature is the temperature at which the oligomer shows a melt viscosity of 48,000 poises when the oligomer is melted by heating at a rate of 4.degree. C./min and extruded from a nozzle of 1 mm in inner diameter and 10 mm in length under a load of 100 kg/cm.sup.2 and wherein a ratio of the polymer having the glass transition temperature of 10.degree. C. or below to the aromatic oligomer is 99:1 to 50:50 by weight.
A thermoplastic elastomer composition comprising a thermoplastic graft copolymer of which main chain is constituted by a polymer having a glass transition temperature of 10.degree. C. or below and side chain is constituted by an aromatic oligomer having a flow temperature between 100.degree. C. and 400.degree. C., and an olefinic polymer wherein the flow temperature is the temperature at which the oligomer shows a melt viscosity of 48,000 poises when the oligomer is melted by heating at a rate of 4.degree. C./min and extruded from a nozzle of 1 mm in inner diameter and 10 mm in length under a load of 100 kg/cm.sup.2 and wherein a ratio of the polymer having the glass transition temperature of 10.degree. C. or below to the aromatic oligomer is 99:1 to 50:50 by weight, and said elastomer composition having a Shore A hardness of 40 or less.
Dependencies are inferred from the claim text.