Thermoplastic Vulcanizates Comprising BIMSM Rubber and Polyamide
OwnerTonson Abraham, Aditya Jindal +4inventors
InventorsTonson Abraham, Aditya Jindal, Jillanne J. Grimm, Michael P. Mallamaci, Kristina T. Nguyen, Kenneth W. Russell
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Abstract
Disclosed are thermoplastic vulcanizates comprising a plastic phase and a rubber phase and process for preparing such thermoplastic vulcanizates, wherein the plastic phase comprises a thermoplastic polymer and the rubber phase comprises a brominated poly(isobutylene-co-para-methylstyrene) rubber.
Claims22
A thermoplastic vulcanizate comprising a plastic phase and a rubber phase, wherein
- a) the plastic phase comprises from about 30 parts to about 95 parts by weight, based on 100 parts by weight of the plastic and rubber phases, of a semi-crystalline aliphatic polyamide having a melting point of about 160° C. to about 260° C.;
- and
- b) the rubber phase comprises from about 70 parts to about 5 parts, by weight based on 100 parts by weight of the plastic and rubber phases, of a brominated poly(isobutylene-co-para-methylstyrene) rubber;
- and
- c) crosslinks in the rubber.
A thermoplastic vulcanizate prepared by dynamically crosslinking a melt blend with an addition type curing agent, wherein the melt blend comprises a plastic phase and a rubber phase, and wherein
- the plastic phase comprises from about 30 parts to about 95 parts by weight, based on 100 parts by weight of the plastic and rubber phases, of a semi-crystalline aliphatic polyamide having a melting point of about 160° C. to about 260° C.;
- and
- the rubber phase comprises from about 70 parts to about 5 parts, by weight based on 100 parts by weight of the plastic and rubber phases, of a brominated poly(isobutylene-co-para-methylstyrene) rubber.
A process for producing a thermoplastic vulcanizate comprising mixing a composition comprising a plastic phase and a rubber phase with an addition type curing agent, wherein the mixing is carried out under mixing conditions that produce an appropriate shear profile and at a temperature above the melting point of the plastic phase, and wherein
- the plastic phase comprises from about 30 parts to about 95 parts by weight, based on 100 parts by weight of the plastic and rubber phases, of a semi-crystalline aliphatic polyamide having a melting point of about 160° C. to about 260° C.;
- and
- the rubber phase comprises from about 70 parts to about 5 parts, by weight based on 100 parts by weight of the plastic and rubber phases, of a brominated poly(isobutylene-co-para-methylstyrene) rubber.
Dependencies are inferred from the claim text.