WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO2005010073) PROCESS FOR PREPARING BRANCHED POLYCARBONATE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2005/010073    International Application No.:    PCT/US2004/020938
Publication Date: 03.02.2005 International Filing Date: 29.06.2004
IPC:
C08G 64/14 (2006.01), C08G 64/20 (2006.01), C08G 64/24 (2006.01)
Applicants: DOW GLOBAL TECHNOLOGIES INC. [US/US]; Washington Street, 1790 Building, Midland, MI 48674 (US) (For All Designated States Except US).
ROHDE, Susanne [DE/DE]; (DE) (For US Only).
ELBERT, Bernhard [DE/DE]; (DE) (For US Only)
Inventors: ROHDE, Susanne; (DE).
ELBERT, Bernhard; (DE)
Agent: MORSE, Jonathan, W.; The Dow Chemical Company, Intellectual Property, P.O. Box 1967, Midland, MI 48641-1967 (US)
Priority Data:
60/489,404 23.07.2003 US
Title (EN) PROCESS FOR PREPARING BRANCHED POLYCARBONATE
(FR) PROCEDE DE PREPARATION DE POLYCARBONATE RAMIFIE
Abstract: front page image
(EN)The present invention is a process for producing branched polycarbonate providing for optimum utilization of the branching agent. It was surprisingly found that adding at least a portion of the coupling catalyst to the polymerization at a point during the oligomerization in the reaction results in a higher degree of branching and improved rheological properties.
(FR)La présente invention a trait à un procédé de production de polycarbonate ramifié assurant une utilisation optimale de l'agent de ramification. De manière inattendue, on a observé que l'ajout d'au moins une portion d'un catalyseur de couplage à la polymérisation à un point lors de l'oligomérisation dans la réaction entraîne un degré supérieur de ramification et des propriétés rhéologiques améliorées.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IT, LU, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)