Aliphatic polyester polyether copolymer, process for producing the same and aliphatic polyester composition using the copolymer
US7342086B2 · kind B2 · utility
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29Claims
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Key dates
| Filing date | Jan 3, 2005 |
| Grant date | Mar 11, 2008 |
| Priority date | — |
| Expiry date | Jan 3, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/03
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An aliphatic polyester polyether copolymer is provided having an aliphatic polyester moiety comprising 35 to 50 molar % of an aliphatic diol unit, 35 to 50 molar % of an aliphatic dicarboxylic acid unit and 0 to 30 molar % of an aliphatic oxycarboxylic acid unit and a polyether moiety, wherein ηsp/C is not less than 1.40 and the ratio by weight of the polyether moiety to the aliphatic polyester polyether copolymer is 0.1 to 90% by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.