Process for suspension polymerization
US4870143A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1987 |
| Grant date | Sep 26, 1989 |
| Priority date | — |
| Expiry date | Dec 21, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/91
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
By a process for suspension polymerization, which comprises steps of: PA0 supplying a slurry comprising droplets of a monomer liquid having a substantially uniform size dispersed in an aqueous dispersion medium to a tower type reactor in which said medium forms a downflow, and PA0 suspension polymerizing the monomer with avoiding merging or splitting of the droplets in a fluidized bed which is formed by the downflow of said medium and buoyancy of the monomer liquid droplets, wherein PA0 the specific gravity of said medium is made larger than that of a polymer particle to be produced by the addition of a water soluble inorganic salt to said medium, and PA0 a polycarboxylic acid type anionic polymeric surfactant is used as a suspension stabilizer for the monomer liquid droplets, PA0 polymer particles having a substantially uniform size are produced with high polymerization conversion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.