(Meth)acrylic polymers, method for making same and use thereof as pigment dispersant
US6040386A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1998 |
| Grant date | Mar 21, 2000 |
| Priority date | — |
| Expiry date | Sep 18, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
(Meth)acrylic copolymers of general formula ##STR1## in which: the M.sup.+ are monovalent cations arising from the neutralization of the --COOH groups, it being possible, however, for this neutralization to have been only partial; PA1 R.sub.1 and R.sub.2 are chosen from: hydrogen, long-chain linear or branched cycloalkyl or alkyl radicals and aryl radicals having from 8 to approximately 22 carbon atoms, with the condition that at least one of R.sub.1 and R.sub.2 is not hydrogen; PA1 R.sub.3 and R.sub.4 are independently chosen from: the hydrogen atom, short-chain cycloalkyl or alkyl radicals PA1 having from 1 to 7 carbon atoms and aryl radicals having from 6 to 7 carbon atoms; PA1 R.sub.5, R.sub.6, and R.sub.7 are each, independently of one another, chosen from the hydrogen atom and the methyl radical; PA1 .tau..sub.1 is the molar level of long-chain amide units in the copolymer; and PA1 .tau..sub.2 is the molar level of short-chain amide units optionally present in the copolymer. Their weight-average molar mass does not exceed 30,000 and .tau..sub.1 is between 0.01 and 0.30.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.