Petroleum resin and pressure sensitive adhesive formulations...

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

400/3046, 402/40

C08F 240/00 (2006.01) C09J 153/02 (2006.01) C09J 157/02 (2006.01)

Patent

CA 1246790

ABSTRACT OF THE DISCLOSURE This invention relates to pressure sensitive adhesive formulations which include a block copolymer of styrene and isoprene such as Kraton? D and a tackifying resin derived from petroleum feedstock polymerized in the presence of aluminum chloride and having a ?w ranging from 800 to 960, a ?n ranging from 500 to 600 with a ?w/?n ratio of from 1.3 to 1.9, a softening point of 78 to 81°C and a glass transition temperature of about 50°C whereby the adhesive formulations have a rolling ball tack of less than 5 cm., a 180° peel of higher than 3 pounds per inch, a 90° quick stick of higher than 3 pounds per inch and a Polyken tack of higher than 1,000 g/cm2.

448002

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