FULLY SATURATED PETROLEUM RESIN AND HOT MELT PRESSURE SENSITIVE ADHESIVE FORMULATIONS UTILIZING SAME AS TACKIFIER

摘要

This invention relates to pressure sensitive adhesive formulations which include a saturated midblock thermoplastic elastomer such as a block copolymer of polystyrene and hydrogenated polydiene such as Kraton? G and a fully saturated tackifying resin derived from petroleum feedstock polymerized in the presence of aluminum chloride and having a ?n ranging from 400 to 800, a softening point of 40 to 70.degree.C and a glass transition temperature less than 45.degree.C whereby the adhesive formulations have a rolling ball tack of less than 10 cm., a 180.degree. peel of from 1 to 4 pounds per inch, a 90.degree. quick stick of from 0.5 to 2.0 pounds per inch and a Polyken probe tack of higher than 400 g/cm2 with a formulation containing 100 to 180 phr of the saturated tackifying resin.