General Electric Company

Andra J Moffett

John Robert Campbell

Timothy J Shea

Marinus E Dekkers

Marijn E Dekkers

Farid Fouad Khouri

Vulcanized blends of EPDM rubber and aromatic polyester are provided by melt extruding mixtures of aromatic polyester, such as polyalkylene terephthalate and functionalized EPDM reactive rubber pairs. An EPDM functionalized with epoxy groups can be vulcanized with an EPDM rubber functionalized with thermally labile ester groups capable of generating epoxy reactive carboxylic acid.

Thermoplastic elastomers and method for making

Vulcanized blends of poly(etherimide ester) copolymer or poly(ether-ester-amide) block copolymer with epoxy functionalized EPDM rubber are provided having enhanced elastic recovery %. Vulcanization of compatibilized blends of the poly(etherimide ester) copolymers or poly(ether-ester-amide) block copolymers with epoxy functionalized EPDM rubber can be effected with crosslinking agents, such as, organic diamines.

Vulcanized blends of thermoplastic elastomers and EPDM rubber and method

Melt blends of thermoplastic aromatic polyester, such as polybutylene terethphalate, with epoxy functionalized EPDM rubber or orthoester functionalized EPDM rubber and an effective amount of a crosslinking agent, such as a free radical initiator, have been found to provide thermoplastic elastomers having an elastic recovery % of at least 70.

Ethylenically unsaturated cyclic ortho esters are prepared by the reaction of a hydroxy-substituted cyclic ortho ester such as 4-hydroxymethyl-2-methoxy-2-methyl-1,3-dioxolane with acryloyl chloride, methacryolyl choride, vinylbenzyl chloride or the like. They form polymers, especially EPDM graft copolymers, which are useful in the formation of copolymer-containing compositions with polyesters, polyamides and the like. The copolymer-containing compositions have excellent physical properties and may be employed to compatabilize blends of the same polymers.

Growing community of inventors

Schenectady, NY, United States of America

Andra J Moffett