Aromatic polyacetals and articles comprising them
US9410016B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Jul 16, 2013 |
| Grant date | Aug 9, 2016 |
| Priority date | — |
| Expiry date | Jan 15, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2650/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polymer includes repeat units having the structurewherein R1, R2, Ar1, Ar2, and Ar3 are defined herein. The polymer can be prepared by Suzuki polycondensation. The acetal and/or ketal functionality in the polymer backbone make the backbone-cleavable in acid. The polymer is useful in applications including lithographic photoresists.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.