White non-pigmented hot melt polyolefin adhesives
AssigneeEastman Kodak Company
InventorsKenneth H. Albers, Robert E. Holliday
Life of this patent
Estimating the term…
Abstract
Hot melt polyolefin adhesives are provided having white color. These adhesives contain a white, non-pigmented polymeric composition prepared by polymerizing styrene in the presence of an amorphous polyalpha-olefin.
Claims11
An adhesive composition capable of being used as a hot melt adhesive comprising a blend of styrenated amorphous polyolefin having a styrene content of about 1 to 90 percent by weight and a melt viscosity at 190.degree. C. of at least 10 centipoise prepared by 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 of about 160.degree. C. to about 300.degree. C. and about 10 to 50 weight percent of the adhesive composition of at least one tackifying resin selected from the group consisting of hydrocarbon resins, polyterpene resins and rosin esters.
An adhesive composition capable of being used as a hot melt adhesive comprising a blend of 90 to 50 percent by weight of a mixture of (1) 5 to 90 percent by weight styrenated amorphous polyolefin having a styrene content of about 1 to 90 percent by weight prepared by 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 of about 160.degree. C. to about 300.degree. C., (2) 5 to 85 percent by weight essentially noncrystalline hexane soluble polyolefin having a melt viscosity at 190.degree. C. of about 100 to about 500,000 centipoise and 10 to 50 percent by weight of at least one tackifying resin selected from the group consisting of hydrocarbon resins, polyterpene resins and rosin esters.
An adhesive composition capable of being used as a hot melt adhesive comprising a blend of (1) 10 to 20 percent by weight styrenated amorphous polyolefin containing 30 to 70 weight percent styrene prepared by 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 of about 160.degree. C. to about 300.degree. C., (2) 50 to 70 weight percent amorphous polyolefin, and (3) 20 to 30 weight percent hydrocarbon tackifying resin.
Dependencies are inferred from the claim text.