Process for preparing extrusion grade ABS polymer
US6528591B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2001 |
| Grant date | Mar 4, 2003 |
| Priority date | — |
| Expiry date | Apr 16, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L55/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A continuous mass polymerization process for making an extrusion grade ABS resin having desirable properties and suitable for making refrigerator liners is disclosed. The process comprise charging a reaction mixture into a first in a series of reactors under conditions promoting polymerization, the mixture comprising diene rubber, a mixture of monomers, inert solvent and a chemical initiator to form a reaction mixture. The mixture is then transferred into a subsequent reactor operating at a temperature of 130 to 155° C. with no addition of chemical initiator and the resulting product is then devolatilized. The ABS thus produced contains about 10 to 16 pbw of dispersed rubber particles having an average particle diameter of 0.3 to 0.7 microns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.