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US 4,898,965 AGranted
Additives for synthetic resins
AssigneeTakemoto Yushi Kabushiki Kaisha
InventorsMitsuo Kinoshita, Shigeru Imamura, Hirokazu Matsueda
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Abstract
An additive for synthetic resins contains a block copolymer having as its constituent segments both polyester block obtainable by ring-opening polymerization of .epsilon.-aliphatic lactone and polydiene block. One or more of these polyester blocks are connected to the polydiene block through ester bond and at least one of these polyester blocks has at its end a reactive group such as vinyl group, epoxy group, isocyanate group or carboxyl group.
Claims14
An additive for synthetic resins including a block copolymer of the form X--Y.sub.n where
- X is polybutadiene block, hydrogenated polybutadiene block, polyisoprene block or hydrogenated polyisoprene block with molecular weight 1000-50,000,
- Y is polyester block obtained by ring-opening polymerization of .epsilon.-aliphatic lactone, at least one of said polyester blocks having a reactive group selected from the group consisting of vinykl group, isocyanate group and carboxylic acid group,
- X and Y are connected by ester linkage,
- n is an integer between 1 and 10, and
- X--Y.sub.n is obtained by starting with carboxyl group or hydroxyl group in polybutadiene, hydrogenated polybutadiene, polyisoprene or hydrogenated polyisoprene and by ring-opening polymerization of said .epsilon.-aliphatic lactone in the presence of a catalyst, said polyester block or blocks and said reactive group or groups comprising 10-60 weight % of said block copolymer.
2 more elements
Dependencies are inferred from the claim text.