Liquid monomer feed pipe for continuous extrusion polymerization
US4511535A · kind A · utility
10Cited by
13References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1983 |
| Grant date | Apr 16, 1985 |
| Priority date | — |
| Expiry date | Jan 21, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J19/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A feed pipe is provided for introducing highly reactive monomers into a continuous reactor to effect polymerization of such reactive monomers. The feed pipe has concentric tubes forming a central flow channel and an annular flow channel which are sized to insure laminar flow within said tubes. The feed pipe is particularly useful for feeding melts of organic dianhydride and organic diamine into an extrusion reactor for polyetherimide preparation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.