Thermoplastic polymer material including a microdisperse distributed crosslinked synthetic rubber as a secondary phase and its preparation
AssigneeDuPont Dow Elastomers L.L.C.
InventorsUwe Bolz, Han Gerhard Fritz
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Abstract
A recyclable, thermoplastic, two-phase polymer composition that includes a continuous thermoplastic polyurethane matrix phase and a soft, finely dispersed phase based on an ethylene copolymer that is normally thermodynamically incompatible with the thermoplastic polyurethane. The soft phase includes the product of a co-crosslinking reaction between the ethylene copolymer and a reactive plasticizer such as epoxidized linseed oil.
Claims8
A two-phase polymer material that comprises a continuous matrix polymer phase and a co-crosslinked, microdispersed soft phase, the continuous matrix polymer phase comprising a thermoplastic polyurethane (A) selected from the group consisting of thermoplastic polyether urethanes, thermoplastic polyester urethanes and mixtures thereof, and the dispersed soft phase comprises a product of a reaction between an ethylene copolymer (B) selected from the group consisting of ethylene/vinyl ester copolymers with a vinyl ester content within a range of 5-50% by weight of the copolymer and ethylene/(meth)acrylic acid ester copolymers with a methacrylic acid ester content within a range of 5-50% by weight of the copolymer and an additive combination (C) that comprises a reactive plasticizer and an organic peroxide.
Dependencies are inferred from the claim text.