Polyamide, polyester and polyether block copolymer
US7968655B2 · kind B2 · utility
3Cited by
3References
24Claims
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Key dates
| Filing date | Dec 5, 2007 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | Feb 23, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2261/126
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a segmented block copolymer including polyamide blocks, polyester blocks and polyether blocks, of general formula: (I) -[BD-BM]n- in which: BD or hard block is a polyamide block; BM or soft block represents a mixture of polyether blocks and polyester blocks; and n is the number of -BD-BM- units in said copolymer, characterized in that the percentage of polyether blocks (PE blocks) is strictly higher than 15 wt % of said copolymer, and in that said polyester blocks (PES blocks) have a glass transition temperature Tg below 10° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.