Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1975-07-29
1977-09-13
Wong, Jr., Harry
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
260 4AR, 260 285A, 260 285B, 260897A, 428261, 526290, 526308, 526337, 526344, 526916, C08F21234, C08F 400, C08F23610
Patent
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.
Ishikawa Atsuo
Iwata Riso
Shinohara Yonesaku
Takahata Hitoshi
Tsubaki Hidemi
Nippon Zeon Co. Ltd.
Wong, Jr. Harry
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