Process for continuously preparing rubber modified styrene resins
US5506304A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1994 |
| Grant date | Apr 9, 1996 |
| Priority date | — |
| Expiry date | Jun 24, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/942
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for continuously preparing rubber modified styrene resins from styrene monomers and acrylonitryle monomers in the presence of a rubbery polymer in accordance with a continuous mass and/or solution polymerization method by the use of serial polymerization device comprising two or more reactors; said process comprising PA1 (1) a first step of feeding a polymeric materials to the first reactor to carry out the polymerization of monomers in a condition where the rubbery polymer is not inverted to the dispersed phase, and a second step of adding a polymeric materials to second reactors to carry out the polymerization of the monomers and to thus invert the rubbery polymer to the dispersed phase, PA1 (2) a ratio of the added materials to the materials used in the first step being in the range of from 10 to 220% by weight, whereby impact resistance and surface gloss can be remarkably improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.