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1. (WO1998052978) SOLID STATE DEVOLATILIZATION OF SYNDIOTACTIC VINYL AROMATIC POLYMERS WITH CATALYST DEACTIVATION
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1998/052978 International Application No.: PCT/US1998/001842
Publication Date: 26.11.1998 International Filing Date: 30.01.1998
Chapter 2 Demand Filed: 17.11.1998
IPC:
C08F 6/00 (2006.01) ,C08F 6/02 (2006.01)
Applicants: THE DOW CHEMICAL COMPANY[US/US]; 2030 Dow Center Midland, MI 48674, US
Inventors: BILLOVITS, Gerald, F.; US
TIPLER, Scott, A.; US
Agent: ZETTLER, Lynn, M.; Patent Dept. P.O. Box 1967 Midland, MI 48641-1967, US
Priority Data:
60/047,50423.05.1997US
Title (EN) SOLID STATE DEVOLATILIZATION OF SYNDIOTACTIC VINYL AROMATIC POLYMERS WITH CATALYST DEACTIVATION
(FR) DEGAGEMENT DES MATIERES VOLATILES EN PHASE SOLIDE DE POLYMERES SYNDIOTACTIQUES AVEC NEUTRALISATION CATALYTIQUE
Abstract:
(EN) The present invention is an improved solid state polymer devolatilization process which comprises heating a wet feed mixture comprising polymer, residual monomer(s), process solvents and active catalyst residues in the presence of an inert gas, wherein the improvement comprises replacing the inert gas with a catalyst desactivating gas.
(FR) Cette invention a trait à un procédé de dégagement de matière volatiles d'un polymère en phase solide consistant à chauffer un mélange d'apport humide comportant un polymère, un ou des monomères résiduels, des solvants de procédé et des résidus catalytiques actifs en présence d'un gaz inerte. L'amélioration apportée par l'invention consiste dans le remplacement du gaz inerte par un gaz de neutralisation catalytique.
Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, GM, GW, HU, ID, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, UZ, VN, YU, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)