摘要:
A process of preparing a nanocomposite comprised of an elastomer and at least partially exfoliated, intercalated water-swellable clay, comprising the steps of (A) forming a first blend of water-swelled clay and anionic polymer particle emulsion by blending: (1) an aqueous mixture comprised of water and a multilayered water-swellable clay, exclusive of an intercalant for said clay, wherein said water-swellable clay is comprised of a plurality of stacked platelets with water-expanded galleries between said platelets, wherein said galleries contain naturally occurring cationic ion exchangeable ions therein, and (2) an emulsion of anionic synthetic vinylpyridine-styrene-butadiene terpolymer (VPSBR) elastomer particles as an aqueous pre-formed elastomer emulsion having a pH in a range of from about 6 to about 11, comprised of anionic elastomer particles (elastomer particles having anions on the surface derived from an anionic surfactant) prepared by aqueous free radical induced polymerization of monomers in the presence of a free radical generating polymerization initiator and non-polymerizable anionic surfactant, wherein said synthetic elastomer particles are derived from an aqueous polymerization of said monomers comprising from about 0.1 to about 40 weight percent of styrene, from about 60 to about 100 weight percent of 1,3-butadiene, and from about 0.1 to about 8 percent by weight of vinylpyridine monomers which have the structural formula: wherein R1 represents a hydrogen atom or a straight chain or branched alkyl group containing 1 to 4 carbon atoms; and (B) blending with said first blend an aqueous mixture comprised of water and inorganic acid having a pH in a range of about 1 to about 4.
摘要:
A pneumatic tire comprising at least one component, the at least one component comprising a rubber composition comprising:an vinylpyridine-styrene-butadiene (VPSBR) elastomer derived from monomers comprising vinylpyridine, styrene, and butadiene, wherein the VPSBR comprises from about 0.1 to about 8 percent by weight of vinylpyridine; andfrom about 5 to about 15 parts by weight, per 100 parts by weight of VPSBR, of an at least partially exfoliated clay.
摘要:
This invention relates to preparation of nanocomposites comprised of elastomer and a dispersion of an at least partially exfoliated water swellable clay and to rubber compositions containing such nanocomposite and articles of manufacture which contain at least one component thereof. The nanocomposite is prepared by addition of a water suspension of water swellable clay particles to an anionic aqueous emulsion of elastomer particles to form a mixture to which an amine having at least two amine centers is added to intercalate and at least partially exfoliate the water swelled clay particles by an ion exchange within the galleries of the multilayered clay with cation exchangeable ion(s) and to aid in coagulating the elastomer and resultant clay particles to form said nanocomposite.
摘要:
This invention relates to preparation and use of nanocomposites formed in situ within an elastomer host wherein the nanocomposite is comprised of an elastomer matrix and a dispersion therein of at least partially exfoliated clay platelets. Rubber composites can be prepared by blending such nanocomposite with additional elastomer(s), additional reinforcing filler(s) and/or a coupling agent. The invention further relates to the preparation of articles of manufacture, including tires, having at least one component comprised of said nanocomposite or said rubber composite. Such a tire component may be selected from, for example, tire tread and tire innerliner.
摘要:
This invention relates to an aqueous based process for the preparation of intercalated and/or exfoliated natural or synthetic clays using block copolymers in latex form containing at least one non-polar block and one or more cationic blocks, wherein the block copolymers are prepared by an emulsion controlled free radical polymerization method.
摘要:
The present invention is directed to a pneumatic tire comprising at least one component, the at least one component comprising a rubber composition, the rubber composition comprising from about 50 to about 100 parts by weight, per 100 parts by weight of elastomer, of a vinylpyridine-styrene-butadiene (VPSBR) elastomer comprising units derived from monomers comprising styrene, 1,3-butadiene, and vinylpyridine monomers which have the structural formula: wherein R1 represents a hydrogen atom or a straight chain or branched alkyl group containing 1 to 4 carbon atoms, wherein the VPSBR comprises from about 0.1 to about 8 percent by weight of vinylpyridine monomer; from 0 to about 50 phr of at least one additional diene-based elastomer; from about 5 to about 15 phr of an at least partially exfoliated clay; and from about 1 to about 40 phr of a polyoctenamer.
摘要:
The present invention pertains to compounds and polymers which incorporate a boronic acid sensor group (SG) of the formula (I): wherein: J is independently —CH2— or —CH2CH2—; n is independently 0, 1, 2, or 3; and each RR, if present, is independently a ring substituent; and wherein the ring attachment (i.e., where sensor group is attached) is via the 3-, 4-, 5-, or 6-ring position. Such compounds and polymers are useful in the selective chemical detection and/or quantitation of alpha-hydroxy carboxylic acids, such as lactic acid/lactate and malic acid/malate. The present invention also pertains to methods of preparing such compounds and polymers; methods and assays which employ these compounds and polymers; devices (e.g., holographic sensors) and kits for use in such methods and assays, etc.
摘要:
Pneumatic rubber tire having at least one component of a polybutadiene-rich rubber composition comprised of a blend of a continuous phase of a specialized cis 1,4-polybutadiene rubber and a dispersed phase comprised of a composite of styrene/butadiene elastomer which contains a dispersion of at least partially exfoliated, intercalated, clay platelets, wherein said cis 1,4-polybutadiene rubber and styrene/butadiene elastomer have spatially defined glass transition temperatures, wherein said blend contains amorphous silica and carbon black reinforcement. Such tire component may be, for example, a circumferential tread having a running surface intended to be ground-contacting or a sidewall insert.
摘要:
The present invention relates to unglycosylated isolated and purified recombinant polypeptides comprising a fusion protein able to bind to autoantibodies produced in response to an autoimmune disease associated with an immune reaction to a TSH-receptor (TSHR). Also disclosed are methods of detecting and/or quantifying such autoantibodies using the isolated and purified recombinant polypeptides and respective kits.