Polymethacrylic acid anhydride telomers
US8859686B2 · kind B2 · utility
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Key dates
| Filing date | Mar 13, 2014 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Mar 13, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides compositions of phosphorus acid group and methacrylic anhydride group containing telomeric copolymers of methacrylic acid having an as yet never achieved amount of more than 70 wt. %, or, preferably, 72 wt. % or more, and up to 99 wt. %, of methacrylic anhydride groups based on the total weight of polymerized methacrylic acid and/or salt units. The compositions enjoy higher thermal stability than was previously achieved and enable easer processing that does not require the removal of liquids or solvents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.