Disproportionation of rosin in the presence of dithiin derivatives
US4265807A · kind A · utility
6Cited by
8References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 22, 1980 |
| Grant date | May 5, 1981 |
| Priority date | — |
| Expiry date | Jan 22, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09F1/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a method of disproportionating rosin comprising heating said rosin in the presence of a dithiin derivative such, for example, as 2,5-diphenyl dithiin. The method can be carried out at about 150.degree. C. to about 300.degree. C. for about 1 hour to about 10 hours with the longer reaction time corresponding to the lower temperatures. Preferably, the process is run at about 260.degree. C. to about 300.degree. C. for about 3 to 8 hours.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.