Process for preparing petroleum resins
US3950453A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1974 |
| Grant date | Apr 13, 1976 |
| Priority date | — |
| Expiry date | Jun 13, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F240/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for preparing petroleum resins having a low melt viscosity and satisfactory compatibility, characterized by firstly polymerizing a first feed portion comprising at least one chain conjugated diolefin having 4 to 5 carbon atoms and at least one monoolefinic unsaturated hydrocarbon having 4 to 10 carbon atoms in a proportion of 20 - 80 percent by weight of the monomers contained in the first feed portion and secondly polymerizing a second feed portion comprising at least one such chain conjugated diolefin and, if desired, at least one such monoolefinic unsaturated hydrocarbon, the first and second polymerizations being successively conducted in the presence of a Friedel-Crafts type catalyst in a polymerization reactor or reactors connected in series to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.