Abstract:
The invention relates to treatment of a pre-hydrophobated precipitated silica in situ within a rubber composition. The invention relates to preparation of treated precipitated silica by treatment of pre-hydrophobated precipitated silica in situ within a rubber composition with a bis(3-trialkoxysilylalkyl) polysulfide. The invention further comprises the resultant rubber composition and a tire having a component thereof.
Abstract:
The present invention relates to a functionalized siloxy compound which is useful in silica-filled rubber compositions and the processing of a sulfur curable rubber composition containing silica. Accordingly, the invention further relates to a rubber composition containing at least one diene-based elastomer, particulate synthetic amorphous silica (e.g. precipitated silica) and said functionalized siloxy compound as a coupling agent and to an article of manufacture (e.g. tire) containing a component comprised of such rubber composition.
Abstract:
The invention relates to a tire of a structural combination of tire tread and sidewall components with compositional limitations containing minimal, if any, of in situ formed alcohol and methyl isobutyl ketone byproducts. The tread component rubber composition contains pre-hydrophobated silica reinforcement. The sidewall component contains low unsaturation EPDM or brominated copolymer of isobutylene and p-methylstyrene and may contain pre-hydrophobated silica reinforcement. The silica reinforcement for said tread and sidewall components is a pre-hydrophobated precipitated silica. The pre-hydrophobated silica is prepared, prior to mixing with the elastomer(s), by reacting hydroxyl groups (e.g. silanol groups) contained on the surface of a precipitated silica with an alkoxyorganomercaptosilane or a combination of an alkoxyorganomercaptosilane and a substituted alkylsilane or with a bis-3(trialkoxysilylalkyl) polysulfide which contains an average of from 2 to 4 connecting sulfur atoms in its polysulfidic bridge to form a composite thereof. The alcohol byproduct therefrom is removed from the composite prior to its introduction into the rubber composition(s). In another aspect of the invention, the connecting sidewall rubber composition, and optionally the tread composition is free of N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine antidegradant (referred herein to as 6PPD) in order to prevent in situ formation of methyl isobutyl ketone byproduct from the reaction of 6PPD with atmospheric oxygen and/or ozone.
Abstract:
The present invention relates to a process for the preparation of organosilicon polysulfide compounds. The process involves reacting a mercaptoalkoxysilane with a dithiodimorpholine compound.
Abstract:
The present invention relates to a process for the preparation of organo silicon disulfide compounds. The process involves reacting a mercaptoalkoxysilane with a sulfenamide compound.
Abstract:
The invention relates to functionalized lignin, rubber compositions which contain functionalized lignin and to products which have at least one component comprised of such rubber composition.
Abstract:
The invention relates to functionalized lignin, rubber compositions which contain functionalized lignin and to products which have at least one component comprised of such rubber composition.
Abstract:
This invention relates to a dual phase rubber composition and pneumatic tire with a rubber sidewall thereof, namely a dual phased non-black colored rubber composition composed of a first pre-formed elastomer phase comprised of butyl-type rubber and EPDM rubber containing a dispersion therein of reinforcing filler comprised of a particulate amorphous precipitated silica and a second pre-formed elastomer phase comprised of a nanocomposite of natural rubber containing a dispersion therein of exfoliated clay platelets. Said exfoliated clay platelets may be substantially oriented within the tire sidewall in a parallel direction to each and may also be substantially oriented in an annular direction about the axis of the tire. The tire sidewall rubber composition may contain at least one additional elastomer which may be included in either or both of said elastomer phases. Such tire sidewall rubber composition may contain a non-black colorant pigment, such as for example a white colored titanium dioxide pigment. The dual phased tire sidewall rubber composition is prepared by a phase mixing process comprised of pre-blending said butyl-type rubber and EPDM rubber together with said precipitated silica reinforcing filler to form a pre-mix thereof, and thereafter mixing therewith said nanocomposite as a pre-formed blend of natural rubber and exfoliated clay platelets.
Abstract:
The invention relates to a tire having at least one component comprised of a rubber composition which contains pre-hydrophobated precipitated silica aggregates. Such tire component may be, for example although not limited to, a tire tread, sidewalls and/or sidewall insert. Such pre-hydrophobated precipitated silica aggregates are contemplated as being prepared, for example, by treatment of a colloidal silica with a combination of both an organomercaptosilane and an alkylsilane.
Abstract:
The present invention relates to a composition and a method of processing a composition containing from 0.1 to 10 phr of a tin organoacid salt selected from the group consisting of compounds of the formula where R3 and R4 are independently selected from the group consisting of alkyls having from 1 to 20 carbon atoms, alkenyls having from 1 to 20 carbon atoms and aryls and alkaryls having from 6 to 20 carbon atoms.