Patent ID: 9120927
Filing Date: 2015-09-01
Classification: B60C,C08L

Abstract:
1. A process for producing a thermoplastic elastomer composition having a matrix phase comprising a polyamide resin and an ethylene/vinyl alcohol copolymer and a disperse phase comprising a rubber composition, wherein, using a twin screw kneader having at least two supply ports, the polyamide resin and the rubber composition are supplied to an upstream supply port of the twin screw kneader, and the polyamide resin and the rubber composition are melt-blended to prepare a blend of the polyamide resin and the rubber composition having a sea-island structure, in which the polyamide resin constitutes a matrix phase and the rubber composition constitutes disperse phases, and, by supplying the ethylene/vinyl alcohol copolymer to a downstream supply port of the twin kneader, the ethylene/vinyl alcohol copolymer is added to the blend and melt-blended to prepare a thermoplastic elastomer composition having sea-island structure, in which the polyamide resin and the ethylene/vinyl alcohol copolymer constitute a matrix phase, and the rubber composition constitutes a disperse phase.