Process for preparing comb-branched polymers
US6214958A · kind A · utility
24Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1999 |
| Grant date | Apr 10, 2001 |
| Priority date | — |
| Expiry date | Jul 21, 2019 |
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.