1,3,2-dioxastannolane-modified elastomers and compositions conta

Details 1,3,2-dioxastannolane-modified elastomers and compositions conta 1,3,2-dioxastannolane-modified elastomers and compositions conta

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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