There are disclosed a block copolymer of at least one elastomeric block and at least one syndiotactic polystyrene block which comprises 100 parts by weight of a polymer component comprising 1 to 80% by weight of syndiotactic polystyrene (sPS) block(s) and 99 to 20% by weight of rubbery elastomeric block(s) and at least 30 parts by weight of an extender. These extended block copolymer compositions display the characteristics of thermoplastic elastomers and are useful for high temperature applications possessing unique softness.

Se divulga un copolímero del bloque por lo menos de un bloque elastomeric y por lo menos un bloque syndiotactic del poliestireno que abarque 100 porciones en peso de un componente del polímero que abarca 1 a el 80% en peso de block(s) syndiotactic del poliestireno (SPS) y 99 a el 20% en peso de block(s) elastomeric parecido a la goma y por lo menos 30 porciones en peso de un suplemento. Estas composiciones extendidas del copolímero del bloque exhiben las características de elastomers termoplásticos y son útiles para los usos de alta temperatura que poseen suavidad única.

 
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< Polystyrene beads for drainage fields

< Oil-resistant rubber modified polystyrene composition

> Method for the production of substantially open-cell polystyrene sheet

> Foamed polystyrene products and method for their production

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