Process for preparing petroleum resins

Details Process for preparing petroleum resins Process for preparing petroleum resins

1974-06-13

1976-04-13

Holler, Alan

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 82, 260 853R, 260879, 260880B, C08F29700, C08F24000

Patent

active

039504530

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.

REFERENCES:
patent: 3297793 (1967-01-01), Dollinger
patent: 3356763 (1967-12-01), Dollinger et al.
patent: 3639517 (1972-02-01), Kitchen et al.
patent: 3639521 (1972-02-01), Hsieh
patent: 3707520 (1972-12-01), Pampus et al.
patent: 3825624 (1974-07-01), Hirai et al.
patent: 3855187 (1974-12-01), Winkler et al.

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