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1. (WO2018219815) PROCESS FOR THE PRODUCTION OF AN ETHYLENE-PROPYLENE-DIENE TERPOLYMER (EPDM) COMPOSITION

Pub. No.:    WO/2018/219815    International Application No.:    PCT/EP2018/063801
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Sat May 26 01:59:59 CEST 2018
IPC: C08J 3/24
C08K 5/00
C08K 5/14
C08L 23/08
C08L 23/14
C08L 23/16
Applicants: SABIC GLOBAL TECHNOLOGIES B.V.
Inventors: NANDI, Sangita
KHATOKAR, Rukmini
GANGULY, Anirban
BANERJEE, Debasish
MITRA, Susanta
PASK, Stephen, D.
Title: PROCESS FOR THE PRODUCTION OF AN ETHYLENE-PROPYLENE-DIENE TERPOLYMER (EPDM) COMPOSITION
Abstract:
The present invention relates to a process for the production of an ethylene-propylene-diene terpolymer (EPDM) composition in a reaction vessel comprising the following steps in this order: (a) supplying a quantity of a first composition comprising an ethylene copolymer or a propylene copolymer and a first peroxide to the reaction vessel; (b) supplying a quantity of a second composition comprising EPDM and a second peroxide to the reaction vessel; or (a) supplying a quantity of a second composition comprising EPDM and a second peroxide to the reaction vessel; (b) supplying a quantity of a first composition comprising an ethylene copolymer or a propylene copolymer and a first peroxide to the reaction vessel; and (c) exposing the contents of the reaction vessel under stirring to a temperature of 100-200°C; wherein the ethylene copolymer is a copolymer comprising polymeric units derived from ethylene and polymeric units derived from a mono-olefinic compound comprising 3 to 10 carbon atoms, and wherein the propylene copolymer is a copolymer comprising polymeric units derived from propylene and polymeric units derived from a mono-olefinic compound comprising 2 carbon atoms or 4-10 carbon atoms. Such process allows for the production of an oil-extended EPDM composition having a certain high Mooney viscosity whilst still using an EPDM as obtained from the polymerisation process having a relatively moderate Mooney viscosity.