"""Process for preparing petroleum resins having low softening points and narrow molecular weight ranges"""
US4078132A · kind A · utility
Inventor
Key dates
| Filing date | Aug 9, 1976 |
| Grant date | Mar 7, 1978 |
| Priority date | — |
| Expiry date | Aug 9, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F240/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Low softening point resins are prepared by a process which comprises polymerising using a Friedel Crafts catalyst: (1) a petroleum resin feed comprising C.sub.5 olefins and C.sub.5 diolefins or a mixture of C.sub.5 and C.sub.6 olefins and diolefins, said feed being obtained from the cracking of petroleum feedstock and being subjected to thermal soaking at a temperature of 100.degree. C to 150.degree. C, and (2) a branched chain reactive aliphatic olefin or an oxygenated transfer agent. Preferred additives are diisobutene or U.O.P. olefins. The polymerization may take place in the presence of a C.sub.8 to C.sub.10 unsaturated aromatic compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.