Thermally polymerized dicyclopentadiene/vinyl aromatic resins

Details Thermally polymerized dicyclopentadiene/vinyl aromatic resins Thermally polymerized dicyclopentadiene/vinyl aromatic resins

1995-06-07

1998-04-14

Zitomer, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526308, 526335, 526339, 526340, 526347, 5263471, 5263482, C08F23208

Patent

active

057392390

ABSTRACT:
A hydrocarbon resin is prepared by (1) thermally polymerizing a mixture consisting essentially of (a) about 40% to 90% by weight based on total monomers of a cyclic diolefin component comprising at least about 50% by weight dicyclopentadiene, and (b) about 60% to 10% by weight based on total monomers of a specified vinyl aromatic component, preferably alpha-methylstyrene; para-methyl-.alpha.-methyl-styrene; 2,4-diphenyl-4-methyl-1-pentene, or mixtures thereof, and (2) recovering a product having a Ring and Ball softening point of about 70.degree. to about 150.degree. C. Hydrogenation of this resin produces light colored, thermally stable products that are useful as tackifiers in adhesives.

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