Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1983-02-23
1985-04-30
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526237, 526290, 525 99, C08F21014
Patent
active
045145547
ABSTRACT:
This invention relates to pressure sensitive adhesive formulations which include a block copolymer of styrene and isoprene such as Kraton.RTM. D and a tackifying resin derived from petroleum feedstock polymerized in the presence of aluminum chloride and having a Mw ranging from 800 to 960, a Mn ranging from 500 to 600 with a Mw/Mn ratio of from 1.3 to 1.9, a softening point of 78.degree. to 81.degree. C. and a glass transition temperature of about 50.degree. C. whereby the adhesive formulations have a rolling ball tack of less than 5 cm., a 180.degree. peel of higher than 3 pounds per inch, a 90.degree. quick stick of higher than 3 pounds per inch and a Polyken tack of higher than 1,000 g/cm.sup.2.
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patent: 4358574 (1982-11-01), Hughes
Benitez Francisco M.
Hughes Vincent L.
Dexter Roland A.
Exxon Research and Engineering Co.
Michl Paul R.
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