Copolymers of alpha-methylstyrene and styrene and uses thereof
AssigneeHercules Incorporated
InventorsPaul S. Douglas, Anargiros Pete Patellis, Walter A. Vredenburgh
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Abstract
This specification discloses manufacture of copolymers of alpha-methylstyrene and styrene in which the alpha-methylstyrene may range from about 50 to 90% and the softening point may range from about 60.degree. to 100.degree. C. The copolymers have especial utility with elastomers to produce pressure sensitive adhesives and the like, and in hot melt coatings.
Claims6
A copolymer consisting of .alpha.-methylstyrene and styrene as the sole monomers produced by copolymerization of, by weight, from about 90 parts to about 50 parts .alpha.-methylstyrene and from about 50 parts to about 10 parts styrene at a temperature range from about 15.degree. C. to about 45.degree. C. and in the presence of a Friedel-Crafts catalyst, said copolymer having a softening point (ring and ball) of under 100.degree. C.
A copolymer consisting of .alpha.-methylstyrene and styrene as the sole monomers produced by copolymerization of, by weight, from about 75 parts to about 70 parts .alpha.-methylstyrene and from about 25 parts to about 30 parts styrene at a temperature range from about 15.degree. C. to about 45.degree. C. and in the presence of a Friedel-Crafts catalyst, said copolymer having a softening point (ring and ball) of under 100.degree. C.
Dependencies are inferred from the claim text.