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
1991-12-30
1993-09-14
Lipman, Bernard
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...
5253328, 5253329, 5253331, 5253332, 525370, C08F 842
Patent
active
052449661
ABSTRACT:
Modification of lithium-terminated elastomer intermediates by reaction under anionic conditions with 1,3,2-dioxastannolanes provides tin-containing elastomers with improved hysteresis properties. In specific examples, modification of a lithium-terminated styrene-butadiene rubber with a dioxastannolane derived from reaction of dibutyl tin(IV)oxide with an alkyl-substituted 1,3-pentane provides tin-modified SBRs with lowered tan delta properties. Such modified elastomers are useful in making tread portions of pneumatic tires.
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Hergenrother William L.
Oziomek James
Bridgestone Corporation
Hall Daniel N.
Lipman Bernard
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