Polymeric compositions of styrene and amorphous polyolefins useful in preparing hot melt adhesives
AssigneeEastman Kodak Company
InventorKenneth H. Albers
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Abstract
The present invention relates to novel polymeric compositions of styrene and amorphous polyolefins which include amorphous polypropylene, amorphous propylene/alpha-olefin copolymers and blends thereof and to processes for their preparation. These polymeric compositions are useful in preparing hot melt adhesives.
Claims9
A process for preparing polymeric compositions having a styrene content of about 1 to about 90 percent by weight of said compositions which comprises polymerizing styrene in the presence of an amorphous polyolefin having a melt viscosity at 190.degree. C. of from about 100 to about 500,000 centipoise with a peroxide catalyst at a temperature in the range of about 160.degree. to about 300.degree. C.
A white, nonpigmented polymeric polyolefin composition comprising an amorphous polyolefin which contains about 1 to 90 percent by weight polymerized styrene, has a melt viscosity at 190.degree. C. of 100 to 500,000 centipoise prepared by polymerizing styrene in the presence of said amorphous polyolefin with a peroxide catalyst at a temperature of about 210.degree. to about 300.degree. C.
Dependencies are inferred from the claim text.