Additives for synthetic resins
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United States of America Patent
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Feb 6, 1990
Issued Date -
N/A
app pub date -
Jul 6, 1989
filing date -
Nov 7, 1986
priority date (Note) -
Expired
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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.
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