| PATENT ASSIGNEE'S COUNTRY | Japan |
| UPDATE | 05.99 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
PVA-base copolymer obtention - Subjecting a lactone, whose ring is formed of 3-10 C, to ring opening polymn in presence of PVA, said copolymer com prising a PVA chain & aliphatic polyester grafted in ring-ope ned polymer of lactone on PVA chain, & said copolymer ha ving PVA content 2-98 %, polyester content 98-2 % & MW 10,000 - 500,000 |
| PATENT PHOTOCOPY | Available on request |
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