Low softening point beta-pinene-based resins with improved molec

Details Low softening point beta-pinene-based resins with improved molec Low softening point beta-pinene-based resins with improved molec

1997-05-08

2000-09-19

Mullis, Jeffrey C.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 90, 526 91, 526195, 526206, 526210, 526226, 526237, C08F 206, C08F 444, C08F 414, C08F 1014

Patent

active

061213926

ABSTRACT:
The specification discloses a method for producing low softening point beta-pinene based polyterpene resins having an essentially unimodal molecular weight distribution, as well as resins made by the method. In the process a beta-pinene monomer is reacted with an olefinic co-monomer in the presence of a Lewis acid catalyst and a co-catalyst under reaction conditions sufficient to produce a beta-pinene-based copolymer having a softening point in the range of from about 85.degree. to about 125.degree. C., an essentially unimodal molecular weight distribution, and a bound chlorine level of less than about 400 ppm. Because of their low softening points and essentially unimodal molecular weight distributions, the beta-pinene-based resins of the invention are expected to exhibit improved compatibility with block copolymers used in modern adhesive formulations.

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