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US 12,637,554 B2Granted
High impermeability innerliner compound and method for the production thereof
AssigneeBridgestone Europe NV/SA
InventorsPaolo Fiorenza, Gianpaolo Chieffi
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Abstract
Method for the manufacture of the innerliner compound comprising: —a first mixing step wherein at least one cross-linkable unsaturated chain polymeric base and one filler system are mixed together; —a final mixing step wherein a vulcanization system is added and mixed with the mixture deriving from an earlier mixing step; and —an intermediate mixing step, interposed between said first mixing step and the final mixing step, and wherein lignin is added and mixed into the mixture deriving from a previous mixing step.
Claims4
A method for the manufacture of an innerliner compound, the method comprising:
- a first mixing step wherein at least one cross-linkable unsaturated chain polymeric base and a filler system including clay are mixed together;
- a final mixing step wherein a vulcanization system is added and mixed with the mixture deriving from an earlier mixing step;
- and
- an intermediate mixing step interposed between said first mixing step and said final mixing step, wherein lignin is added in an amount of between 5 phr and 25 phr and mixed into a mixture deriving from a previous mixing step;
- wherein the lignin is not added during the first mixing step, and is composed of particles having an average surface area of less than 400 μm2.
2 more elements
Dependencies are inferred from the claim text.