Process and apparatus for preparing uniform size polymer beads
US4444961A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1982 |
| Grant date | Apr 24, 1984 |
| Priority date | — |
| Expiry date | Jul 14, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29B9/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Spheroidal polymer beads having a uniform size are prepared by polymerizing uniformly sized monomer droplets formed by the vibratory excitation of a laminar jet of monomeric material flowing in a continuous liquid medium containing a suitable suspending agent. For example, a laminar jet of a monomer mixture comprising a monovinylidene aromatic such as styrene, a polyvinylidene aromatic such as divinylbenzene and a polymerization initiator can be subjected to vibratory excitation and the resulting monomer droplets polymerized to yield copolymer beads having a narrow particle size range distribution. The resulting copolymer beads can be employed to prepare high yields of ion exchange resins exhibiting superior properties, particularly in continuous ion exchange operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.