Copolymer compositions containing a narrow MWD component and process of making same
US4874820A · kind A · utility
44Cited by
24References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1985 |
| Grant date | Oct 17, 1989 |
| Priority date | — |
| Expiry date | Dec 27, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/922
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to polymeric composition of a first copolymer which includes at least one copolymer having at least one of Mw/Mn less than 2 and Mz/Mw less than 1.8; and a second copolymer having Mw/Mn greater than or equal to 2. The composition can be produced by preparing the first and second copolymers in different reactors and blending them. The blend can also be produced in a single reactor by initiating the reaction to prepare one copolymer, and adding additional reactants, or recycling the reaction mixture, during the reaction to produce the other copolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.