Polymer compositions with improved cold flow
AssigneeBridgestone Corporation
InventorsToshihiro UCHIYAMA, Christine M. Rademacher, Terrence E. Hogan, Kevin M. McCauley
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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 a cold-flow inhibitor with the polymer cement, where the cold-flow inhibitor is selected from the group consisting of vicinal diamides, vicinal diureas and vicinal amide-ureas; and isolating at least a portion of the polymer and the cold-flow inhibitor from the solvent to provide a polymeric composition including the polymer and the cold-flow inhibitor.
Claims20
A method for preparing a polymeric composition, the method comprising:
- i) providing a polymer cement including a polymer and a solvent;
- ii) introducing a cold-flow inhibitor with the polymer cement, where the cold-flow inhibitor is selected from the group consisting of vicinal diamides, vicinal diureas, and vicinal amide-ureas;
- and
- iii) isolating at least a portion of the polymer and the cold-flow inhibitor from the solvent to provide a polymeric composition including the polymer and the cold-flow inhibitor.
A method for preparing a polymeric composition, the method comprising:
- i) combining a polymer, solvent, and a cold-flow inhibitor defined by the formula
- where Σ is a conformationally-immobile hydrocarbyl group, each δ individually includes a ureido or amido group with each δ being vicinally spaced on said Σ, and R1 and R2 are each individually a monovalent organic group;
- and
- ii) isolating at least a portion of the polymer and the cold-flow inhibitor from the solvent to provide a polymeric composition including the polymer and the cold-flow inhibitor.
A polymeric composition comprising:
- i.) a polydiene or polydiene copolymer;
- and
- ii.) a cold-flow inhibitor selected from the group consisting of vicinal diamides, vicinal diureas and vicinal amide-ureas.
Dependencies are inferred from the claim text.