Graft copolymer preparation
US4034020A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1976 |
| Grant date | Jul 5, 1977 |
| Priority date | — |
| Expiry date | Feb 12, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F279/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a continuous flow process for the preparation of graft copolymers, for example ABS, wherein a mixture of a polybutadiene and/or styrenebutadiene copolymer latex, one or more vinyl aromatic monomers and one or more unsaturated nitrile monomers is continuously supplied to a first stage, graft polymerization is initiated in said first stage, the mixture is continuously removed from the said first stage and supplied to at least a second stage wherein graft polymerization is continued, the temperature in each stage being 50.degree. to 100.degree. C, the conversion of monomers to polymer in the first stage not exceeding 65% by weight, and the overall conversion being at least 80% by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.