Process for dissolving polymeric material
US4537513A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1983 |
| Grant date | Aug 27, 1985 |
| Priority date | — |
| Expiry date | Aug 2, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S422/901
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A dispersion of polymeric particles in a non-aqueous liquid is mixed with water with sufficient agitation to initiate substantial dissolution of the particles into water and is substantially homogeneously dispersed into the water substantially immediately, for instance in less than 50 milliseconds from the initiation of substantial dissolution. Preferred apparatus is an orifice mixer having a mixing chamber 41 leading to an orifice 51 and supplied by an inlet 46 for dispersion, the inlet terminating in a valve 47 and an orifice 44, and an inlet 45 for water. The effective outlet area of the orifice 51 is adjusted by an eccentrically mounted aperture plate 52 and there is a shear helix 57.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.