EP 0765362 A1 19970402 - STYRENE/BUTADIENE BLOCK COPOLYMERS STABILIZED WITH -g(a)-TOCOPHEROL
Title (en)
STYRENE/BUTADIENE BLOCK COPOLYMERS STABILIZED WITH -g(a)-TOCOPHEROL
Title (de)
MIT -g(a)-TOCOPHEROL STABILISIERTE STYROL/BUTADIEN-BLOCKCOPOLYMERE
Title (fr)
POLYMERES SEQUENCES STYRENE-BUTADIENE STABILISES PAR -g(a)-TOCOPHEROL
Publication
Application
Priority
- DE 4420769 A 19940615
- EP 9502212 W 19950608
Abstract (en)
[origin: WO9534600A1] The invention concerns moulding compounds consisting of styrene/butadiene block copolymers produced by anionic polymerization and general structure (I), in which A is a block-copolymer segment made up of at least one polystyrene block with a molecular weight of 3,000 to 230,000 and one polybutadiene block with a molecular weight of 2,000 to 30,000 and B is a block-copolymer segment made up of at least one polystyrene block with a molecular weight of 2,000 to 60,000 and one polybutadiene block with a molecular weight of 2,000 to 30,000, the total molecular weight of A being 50,000 to 250,000 and that of B 5,000 to 75,000, the block transitions being sharp or indistinct and the overall star-branch number m+n being 3 to 15, with the provision that m </= n, and/or a linear styrene/butadiene block copolymer with at least two polystyrene blocks and at least one polybutadiene block, lying within the same molecular-weight ranges as given above, plus 0.01 to 1 % by weight, relative to the amount of polymer, of alpha -tocopherol.
IPC 1-7
IPC 8 full level
C08K 5/49 (2006.01); C08K 5/1545 (2006.01); C08K 5/50 (2006.01); C08K 5/524 (2006.01); C08L 53/02 (2006.01)
CPC (source: EP US)
C08K 5/1545 (2013.01 - EP US); C08K 5/524 (2013.01 - EP US); C08L 53/02 (2013.01 - EP US)
Citation (search report)
See references of WO 9534600A1
Designated contracting state (EPC)
BE DE ES FR GB IT NL
DOCDB simple family (publication)
DE 4420769 A1 19951221; EP 0765362 A1 19970402; JP H10501834 A 19980217; US 5877242 A 19990302; WO 9534600 A1 19951221
DOCDB simple family (application)
DE 4420769 A 19940615; EP 9502212 W 19950608; EP 95923266 A 19950608; JP 50159196 A 19950608; US 75067097 A 19970814