Novel hydrocarbon resins and process for preparation thereof

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

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260 4AR, 260 285A, 260 285B, 260897A, 428261, 526290, 526308, 526337, 526344, 526916, C08F21234, C08F 400, C08F23610

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active

040484246

ABSTRACT:
Hydrocarbon resins comprising (a) about 45 to 85% by weight of units derived from 1,3-pentadiene, (b) about 10 to 45% by weight of units derived from .alpha.-methylstyrene, (c) about 3 to 20% by weight of units derived from cyclopentene and (d) 0 to about 20% by weight of units derived from 1,3-butadiene and having a softening point of from about 60.degree. C. to about 140.degree. C., said hydrocarbon resins being prepared by polymerizing a monomeric mixture comprising (a) about 35 to 85% by weight of 1,3-pentadiene, (b) about 10 to 50% by weight of .alpha.-methylstyrene, (c) about 5 to 30% by weight of cyclopentene and (d) 0 to 15% by weight of 1,3-butadiene in a solvent comprising at least 50% by weight of an aromatic hydrocarbon in the presence of an aluminum halide as a catalyst.

REFERENCES:
patent: 3763125 (1973-10-01), Moody et al.
patent: 3784530 (1974-01-01), Osborn
patent: 3872064 (1975-03-01), Pace et al.
patent: 3893986 (1975-07-01), Komai et al.

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