Method for preparing water-soluble acrylic copolymers
US6921801B2 · kind B2 · utility
4Cited by
7References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2001 |
| Grant date | Jul 26, 2005 |
| Priority date | — |
| Expiry date | Mar 27, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L51/003
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention concerns a method for preparing water-soluble acrylic copolymers comprising the following steps: (i) preparing at least a monomer (1) of formula (I) wherein Ao is a —(RtO)mRz or —NRp (RtO)mRz group, by reacting a (meth)acrylic anhydride derivative (1′) of formula (II) with a compound of formula AoH, Ao being as defined above; (ii) copolymerizing said monomer (1) with at least a monomer (2) of (meth)acrylic acid or of a derivative of said acid. The invention also concerns novel water-soluble acrylic copolymers and their use as superplasticizers or dispersants for hydraulic binders such as cements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.