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US 4,803,243 AGranted
Block-graft copolymer
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsTeruo Fujimoto, Mikio Shiono, Osamu Watanabe, Koichi Ito
Life of this patent
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Abstract
Disclosed are a block-graft copolymer comprising a polymer block having a repeating unit represented by General Formula (I): ##STR1## wherein A is a side chain and represents an organopolisiloxane chain, a polyacrylate chain, a polymethacrylate chain, polydiene chain, etc. and a process for producing the same. This block-graft copolymer can have various performances such as oxygen enrichment performance, biocompatibility, depending on the kind of side chains.
Claims4
A block-graft copolymer comprising:
- a polymer block having a repeating unit represented by General Formula (I):
- ##STR13## wherein R.sup.1 represents a hydrogen atom, methyl group or ethyl group;
- R.sup.2 and R.sup.3 may be the same or different and each represent an alkyl group having 1 to 3 carbon atoms or phenyl group;
- m represents an integer of 0 to 4;
- and A represents any one of polymer residual groups represented by General Formulas (II) to (IV) shown below, ##STR14## wherein R.sup.4 may be the same or different and each represent methyl group, ethyl group or phenyl group;
- R.sup.5 is as defined for R.sup.4 or represents a group represented by the formula --Si(R.sup.4).sub.3 ;
- and n is an integer of 1 to 1,000, ##STR15## wherein R.sup.6 represents a hydrogen atom or methyl group;
- and B represents a group represented by the formula --COOR.sup.2, where R.sup.2 is as defined above, ##STR16## --CH.dbd.CH.sub.2 or --C(CH.sub.3).dbd.CH.sub.2 ;
- Y represents cumyl group, n-butyl group, s-butyl group or benzophenone residual group;
- and n is as defined above, ##STR17## wherein Y represents cumyl group, n-butyl group or s-butyl group, and n is as defined above,
- and at least one of polymer blocks having a repeating unit represented by General Formula (V):
- ##STR18## wherein R.sup.7 represents a hydrogen atom, methyl group or ethyl group;
- M represents at least one selected from a group represented by the formula --CH.dbd.CH.sub.2, --C(CH.sub.3).dbd.CH.sub.2, --COOCH.sub.3 or --COOC.sub.2 H.sub.5 and phenyl group.
10 more elements
Dependencies are inferred from the claim text.