Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1992-09-28
1994-07-19
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524271, 524504, 525 98, 525 99, C08F 804, C08L 5100, C08L 5300
Patent
active
053310381
ABSTRACT:
The invention is an adhesive which comprises a linear hydrogenated tri-block copolymer of a vinyl aromatic hydrocarbon and a conjugated diene which has a coupling efficiency of 45% or greater and which has a peak molecular weight of from 50,000 to 150,000. For purposes of determining the concentration of the other components, the polymer is present in an amount of 100 parts rubber (phr). The adhesive further comprises from 30 to 110 phr of an endblock resin, a low molecular weight vinyl aromatic hydrocarbon, preferably alpha methyl styrene or styrene. Finally, the adhesive comprises from 80 to 210 phr of a hydrogenated hydrocarbon resin having a softening point below 35.degree. C.
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Asinovsky Olga
Haas Donald F.
Michl Paul R.
Shell Oil Company
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