Thickening vinyl copolymers
US9102772B2 · kind B2 · utility
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7Claims
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Key dates
| Filing date | Sep 24, 2012 |
| Grant date | Aug 11, 2015 |
| Priority date | — |
| Expiry date | Sep 24, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/286
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A rheology modifier copolymer of formula (I) wherein A is a polyacidic vinyl monomer selected from maleic, fumaric, itaconic, citraconic and acid combinations thereof and anhydrides and salts thereof, B is an acrylic or methacrylic acid or salt thereof; C is a C1-C8 ester of (meth)acrylic acid; D is an associative monomer; and optionally E is a crosslinking monomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.