Process for preparing comb-branched polymers
US6815513B2 · kind B2 · utility
14Cited by
9References
2Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 16, 2001 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | Nov 9, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F290/062
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A continuous process for making a comb-branched copolymer of an acrylic monomer and a polyether macromonomer is disclosed. The process is performed by continuously feeding a reaction zone with a monomer stream that contains an acrylic acid and a polyether macromonomer, and an initiator stream. The comb-branched copolymer made thereby performs better as water reducing agent in cement compared to that made by a batch process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.