Process for preparing novel petroleum resin employing AlRX.sub.2 and alkyl halide or hydrogen halide
US4038474A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1975 |
| Grant date | Jul 26, 1977 |
| Priority date | — |
| Expiry date | Apr 7, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F240/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A novel petroleum resin having not only a relatively low molecular weight but a narrow molecular weight distribution and having excellent characteristics as a tackifier particularly suitable for use in hot-melt adhesives and also suitable for synthetic rubbers, adhesive tapes, sealants, and the like, which resin is obtained by copolymerizing 20 to 80 parts by weight of a so-called spent C.sub.4 - or C.sub.5 -fraction obtained by removing most of the dienic constituents from the fractions mainly of C.sub.4 or C.sub.5 carbon atoms produced by petroleum cracking and 80 to 20 parts by weight of styrene and/or a styrene derivative with a catalyst system comprising an organoaluminum compound represented by the general formula AlRX.sub.2 (wherein R is an alkyl group having 1 to 4 carbon atoms and X is a halogen atom) as main catalyst and an alkyl halide or a hydrogen halide as co-catalyst, in a hydrocarbon solvent at a temperature of 0.degree. to 60.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.