Method for producing phosphoric acid ester-based polymer
US7964682B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2006 |
| Grant date | Jun 21, 2011 |
| Priority date | — |
| Expiry date | Mar 12, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/5317
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Method for producing phosphoric acid ester-based polymer by copolymerizing monomer 1 of formula (1), monomer 2 of formula (2), and monomer 3 of formula (3):wherein the variables are as defined in the specification;wherein the variables are as defined in the specification; andwherein the variables are as defined in the specification, at pH ≦7 in solvent having dissolved oxygen concentration of 0.01-4.0 mg/kg, or in presence of phosphonic acid-based chelating agent, or by mixing monomers 1 to 3 at 10-50 ° C., initiating polymerization within 72 hours, and maintaining the temperature at 10-50 ° C. until polymerization is initiated. The phosphoric acid ester-based polymer may be used as a dispersant in a hydraulic composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.