Graft polymerization process using microfluidization in an aqueous emulsion system
US5239008A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1991 |
| Grant date | Aug 24, 1993 |
| Priority date | — |
| Expiry date | Jun 28, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F290/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the emulsion polymerization of graft copolymers comprising the steps of: a) obtaining an unsaturated polymer containing terminal or pendant polymerizable functionalities; b) dissolving the resultant unsaturated polymer in an ethylenically unsaturated monomer in the presence of a surfactant in water to form an aqueous phase; c) microfluidizing the aqueous phase of (b) to a size of less than 0.5 u; and d) subsequently graft polymerizing a monomer with the unsaturated polymer in the microfluidized aqueous phase using free radical polymerization techniques; such that the graft polymerization reaction occurs within each micelle thereby resulting in uniform particles of the predetermined particle size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.