Copolymers of cyclic esters and cyclic formals
US7151155B2 · kind B2 · utility
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28Claims
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Key dates
| Filing date | Apr 17, 2001 |
| Grant date | Dec 19, 2006 |
| Priority date | — |
| Expiry date | Apr 17, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/823
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed are copolymers of cyclic esters, e.g., caprolactone, and cyclic formals of substituted or unsubstituted diols, e.g., 1,3-dioxepane. The copolymers can provide a low melting temperature rendering them liquids at room temperature. Elastomeric polyurethanes prepared from such copolymers can exhibit a low Tg transition and good resistance to hydrolysis and oxidation. The copolymers are particularly useful for elastomers, coatings, adhesives, inks or binders requiring low temperature flexibility and good resistance to hydrolysis and oxidation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.