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    • 4. 发明公开
    • THERMOPLASTIC POLYURETHANE BLOCK COPOLYMER COMPOSITIONS
    • 热塑性聚氨酯嵌段共聚物组合物
    • EP2534203A1
    • 2012-12-19
    • EP10830701.8
    • 2010-11-11
    • Kraton Polymers US LLC
    • DING, Ruidong
    • C08L53/00
    • C08L53/025C08L53/00C08L75/08C08L91/00
    • A novel block copolymer composition including a hydrogenated block copolymer that has at least one block A and at least one block B, and wherein (a) prior to hydrogenation each A block is a mono alkenyl arene homopolymer block and each B block is a controlled distribution copolymer block of at least one conjugated diene and at least one mono alkenyl arene, (b) subsequent to hydrogenation about 0-10% of the arene double bonds have been reduced, and at least about 90% of the conjugated diene double bonds have been reduced, (c) each A block having a number average molecular weight between about 3,000 and about 60,000 and each B block having a number average molecular weight between about 30,000 and about 300,000, (d) each B block comprises terminal regions adjacent to the A blocks that are rich in conjugated diene units and one or more regions not adjacent to the A blocks that are rich in mono alkenyl arene units, (e) the total amount of mono alkenyl arene in the hydrogenated block copolymer is about 5 percent weight to about 50 percent weight, and (f) the weight percent of mono alkenyl arene in each B block is between about 10 percent and about 75 percent. The thermoplastic polyurethane elastomer is present in the block copolymer in an amount from about 50 to about 95 percent by weight of a thermoplastic polyurethane elastomer.
    • 10. 发明授权
    • PHOTOPOLYMERIZABLE COMPOSITIONS AND FLEXOGRAPHIC PRINTING PLATES DERIVED THEREFROM
    • 可光聚合的组合物和由其制成的柔性版印刷版
    • EP1499923B1
    • 2011-09-21
    • EP04729904.5
    • 2004-04-28
    • KRATON Polymers Research B.V.
    • Muyldermans, Xavier, Kraton Polymers Research S.A.Roumache, Olivier, Kraton Polymers Research S.A.
    • G03F7/033B41M1/04
    • G03F7/033B41M1/04
    • The present invention relates to a photopolymerizable composition, which comprises: (a) from 20 to 98.9 % by weight, based on the weight of components (a) and (b) of one or more thermoplastic elastomeric block copolymers comprising a thermoplastic elastomeric block copolymer of the formulae A-C-A (1) or (A-C)n X (2) wherein each A independently represents a polymer block of predominantly a monovinyl aromatic hydrocarbon having an apparent molecular weight in the range of from 7,000 to 25,000, wherein n is an integer equal to or greater than 2 and wherein X is the residue of a coupling agent, and wherein each C independently represents a substantially random copolymer block J/13) of predominantly isoprene and butadiene in a mutual weight ratio in the range of from 20/80 to 80/20, wherein said polymer block C has a glass transition temperature (Tg) of at most O'C, (determined according to ASTM E-1356-98), and having a vinyl bond content (the 1,2 and/ or 3,4-addition polymerization of the isoprene and butadiene) in the range of from 5 to 70 mole%, said thermoplastic block copolymer having a poly(monovinyl aromatic hydrocarbon) content in the range of from 10 to 45 wt% and having an apparent molecular weight of the complete block copolymer in the range of from 100,000 to 1,500,000, (b) from I to 60 % by weight, based on the weight of components (a) and (b), of one or more photopolymerizable ethylenically unsaturated low molecular weight compounds, (c) from 0. 1 to 10 % by weight, based on the total photomerizable composition of one or more polymerization initiators, and optionally (d) from 0 to 40 % by weight, based on the total photopolymerizable compositions, of one or more auxiliaries, and flexographic printing plates derived from said photopolymerizable compositions, and flexographic printing relief forms prepared from said plates.