Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1993-09-23
1996-05-14
Cain, Edward J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524502, 524504, C08L 5300
Patent
active
055168353
ABSTRACT:
An isoprene-based hydrocarbon resin having a softening point of from 60.degree. to 140.degree. C. and a number average molecular weight of from 500 to 2000 which is obtained by cationic polymerization of a monomer mixture comprising from 40 to 90% by weight of isoprene and from 10 to 60% by weight of an aliphatic monoolefin containing 4 to 10 carbon atoms in the presence of a Friedel-Crafts catalyst and an adhesive composition comprising 100 parts by weight of a base polymer selected from the group consisting of an amorphous propylene polymer, a block copolymer rubber and isoprene rubber and from 10 to 200 parts by weight of said isoprene-based hydrocarbon resin as a tackifier are disclosed. The isoprene-based hydrocarbon resin is excellent in hue and heat stability to provide an adhesive composition excellent in heat stability.
REFERENCES:
patent: 3932328 (1976-01-01), Korpman
patent: 5019071 (1991-05-01), Bany et al.
patent: 5026752 (1991-06-01), Wayakabashi et al.
patent: 5028646 (1991-07-01), Miller et al.
Ishiguro Minoru
Yanasa Haruo
Cain Edward J.
Nippon Zeon Co. Ltd.
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