Petroleum resins of improved color and process for making the same
US5077386A · kind A · utility
5Cited by
19References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1990 |
| Grant date | Dec 31, 1991 |
| Priority date | — |
| Expiry date | Jul 2, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F6/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An petroleum resin of improved color and process for making the same are provided. The improvement in color is the result of a "dry" quench process, in which the polymerizate of an olefinic, diolefinic, aromatic or mixed hydrocarbon feedstock polymerized in the presence of a Friedel-Crafts catalyst is quenched by admixing the polyemrizate with a phosphite instead of the familiar water wash quenching procedure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.