EP 1718687 A1 20061108 - USE OF TETRAFUNCTIONAL INITIATORS TO IMPROVE THE RUBBER PHASE VOLUME OF HIPS
Title (en)
USE OF TETRAFUNCTIONAL INITIATORS TO IMPROVE THE RUBBER PHASE VOLUME OF HIPS
Title (de)
VERWENDUNG VON TETRAFUNKTIONELLEN INITIATOREN ZUR VERBESSERUNG DES KAUTSCHUKPHASENVOLUMENS VON HIPS
Title (fr)
UTILISATION D'INITIATEURS TÉTRAFONCTIONNELS POUR AMÉLIORER LE VOLUME EN PHASE CAOUTCHOUC DU POLYSTYRÈNE ANTICHOC (HIPS)
Publication
Application
Priority
- US 2004038701 W 20041118
- US 72365603 A 20031126
Abstract (en)
[origin: WO2006054995A1] It has been discovered that improved polystyrene products, such as high impact polystyrene (HIPS), may be obtained by polymerizing styrene with a diene polymer in the presence of at least one multifunctional initiator. The presence of the multifunctional initiator tends to cause more branched structures in the polystyrene. Unexpectedly, the ratio of % gel to % rubber (G/R or rubber phase volume) increases as the swell index increases which is the opposite of the conventional trend. Additionally, acceptable G/R values can be achieved at increased polymerization rates with these initiators.
IPC 8 full level
C08F 279/00 (2006.01); C08F 279/02 (2006.01)
CPC (source: EP)
C08F 279/00 (2013.01); C08F 279/02 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LU MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL HR LT LV MK YU
DOCDB simple family (publication)
WO 2006054995 A1 20060526; WO 2006054995 A8 20060831; BR PI0416908 A 20070116; CA 2552761 A1 20060526; EP 1718687 A1 20061108; EP 1718687 A4 20100113; MX PA06005980 A 20070126
DOCDB simple family (application)
US 2004038701 W 20041118; BR PI0416908 A 20041118; CA 2552761 A 20041118; EP 04811417 A 20041118; MX PA06005980 A 20041118