Method to improve cold flow resistance of polymers
AssigneeBridgestone Corporation
InventorsKevin McCauley, Terrence E. Hogan, Christopher G. Robertson, Amy M. Randall
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Abstract
A method for preparing a polymeric composition, the method comprising providing a polymer cement including a polymer and a solvent, introducing an acetal or ketal of an alditol with the polymer cement, and isolating at least a portion of the polymer and the acetal or ketal of an alditol from the solvent to provide a polymeric composition including the polymer and the acetal or ketal of an alditol.
Claims50
A method for preparing a polymeric composition, the method comprising:
- i.) providing a polymer cement including a polymer and a solvent;
- ii.) introducing an acetal or ketal of an alditol with the polymer cement;
- and
- iii.) isolating at least a portion of the polymer and the acetal or ketal of an alditol from the solvent to provide a polymeric composition including the polymer and the acetal or ketal of an alditol.
A method for preparing a polymeric composition, the method comprising:
- i) providing a polymer cement;
- and
- ii) introducing dibenzylidene sorbitol to the polymer cement.
A polymeric composition comprising:
- i.) a functionalized elastomer, where the functionalized elastomer includes a functional group that reduces the 50° C. hysteresis loss of a carbon black filled vulcanizate prepared from the functionalized polymer as compared to similar carbon-black filled vulcanizates prepared from non-functionalized polymer;
- and
- ii.) an acetal or ketal of an alditol, where the acetal or ketal of an alditol is dispersed within said elastomer.
A polymeric composition comprising:
- i.) a vulcanizable elastomer selected from the group consisting of polydienes and polydiene copolymers;
- and
- ii.) at least about 0.5 parts by weight of an acetal or ketal of an alditol per 100 parts by weight elastomer, where the acetal or ketal of an alditol is dispersed within said elastomer, where the acetal or ketal of an alditol increases the cold flow resistance of the vulcanizable elastomer by at least 10%.
Dependencies are inferred from the claim text.