摘要:
One or more embodiments of the present invention provides a method for preparing a chain-extended lithiated thioacetal solution, the method comprising (i) preparing a lithiated thioacetal by reacting an initiator precursor compound with an organolithium compound; and (ii) chain extending the lithiated thioacetal by polymerizing monomer including conjugated diene monomer, optionally together with vinyl aromatic monomer, to form a polymeric or oligomeric segment having at least 3 and less than 125 repeat units.
摘要:
A method for preparing a polymeric composition, the method comprising introducing a functionalized polymer and a filler. Mixing the functionalized polymer and filler to form a first masterbatch, adding additional polymer to the first masterbatch, and mixing the additional polymer and the first masterbatch.
摘要:
It has been discovered that the use of a plasticizer, an ester of a cyclohexanepolycarboxylic acid, especially a 1,2-cyclohexanedicarboxylic acid ester, that is environmentally non-toxic, can replace environmentally unfriendly phthalate plasticizers, such as dioctyl phthalates used in vulcanizable rubber compositions, especially for tires, on a one to one weight basis (phr) without sacrificing beneficial rubber properties.
摘要:
A method for preparing a tire tread, the method comprising vulcanizing a vulcanizable composition comprising a rubber component including a functionalized polymer and a cure system, where the cure system includes sulfur and a disulfide compound represented by the formula I R1—S—S—R3—S—S—R2 where R3 represents a divalent organic group and R1 and R2 each independently include a monovalent organic group including a nitrogen atom.
摘要:
An amino alkoxy-modified silsesquioxane (AMS) comprising one or more compounds selected from the group consisting of an amino AMS, an amino/mercaptan co-AMS, an amino/blocked mercaptan co-AMS, mixtures thereof, and a weak acid-neutralized solid or aqueous solution thereof, and a method of making the amino AMS, are presented. The compounds are useful in compounding, processing, cure and storage of silica-reinforced rubbers because they contain low levels of volatile organic compounds (VOC).
摘要:
A process for forming a tire component, the process comprising the steps of introducing a vulcanizable polymer, a curative, a first carbon black characterized by an iodine adsorption number, per ASTM D1510, that is greater than 60 g/kg, and a second carbon black characterized by an iodine adsorption number, per ASTM D1510, that is less than 60 g/kg to form a vulcanizable composition, fabricating a tire component from the vulcanizable composition, and curing the tire component.
摘要:
Vulcanizable elastomeric compositions and vulcanizates are prepared by employing a nitrogen-containing heterocycle. The nitrogen-containing heterocycle is believed to enhance interaction between a silica particle and a silica-interactive compound.
摘要:
Disclosed herein various uses of styrene monomers derived from biobased material and containing modern carbon atoms, including in copolymers, in rubber compositions, in tire components, and to balance the viscoelastic properties of a rubber composition containing the styrene monomer.
摘要:
A process for producing a modified conjugated diene based polymer includes a step (a) of reacting a silicon compound with a conjugated diene based polymer having an active end so that the reaction takes place at the active end, the silicon compound having a protected primary amino group in the molecule thereof and a silicon atom to which a hydrocarbyloxy group and a reactive group are bonded, to thereby modify the active end, and a step (b) of performing condensation reaction, in the presence of a titanium compound serving as a titanium-based condensation-accelerating agent. A rubber composition contains the modified diene polymer, and a tire is produced from the rubber composition.
摘要:
Metallated aminosilane compounds for use as functional initiators in anionic polymerizations and processes for producing an aminosilane-functionalized polymer using the metallated aminosilane compounds to initiate anionic polymerization of at least one type of anionically polymerizable monomer. Preferred use of the metallated aminosilane compounds results in rubber compositions for use in tires comprising an aminosilane functionalized polymer. A telechelic polymer may result from use of the metallated aminosilane compound as a functional terminator.