Abstract: A polyamide resin composition, having an excellent extensibility and flexing fatigue, composed of a polyamide resin (A), as a matrix, and a modifying polymer (C), dispersed therein, having a functional group (B) reactive with the polyamide resin (A), wherein a tensile stress at break of the modifying polymer (C) is 30 to 70% of the tensile stress at break of the polyamide resin (A), and a tensile elongation at break of the modifying polymer (C) is 100 to 500% of the tensile elongation at break of the polyamide resin (A) as well as a pneumatic tire and hose using the same.

Abstract: A thermoplastic elastomer composition having excellent durability and flexibility while possessing superior air impermeability. In particular, a process for producing a thermoplastic elastomer composition having high rubber content by multistage addition of at least one vulcanizable rubber component, in which the time required to substantially cure the at least one rubber component preferably is less the mixer residence time. Such compositions are particularly useful in applications such as tire innerliners and barrier films or layers.

Abstract: A process for making a substantially saturated dendritic hydrocarbon polymer. The process has the following steps: (a) polymerizing an amount of one or more alkadiene monomers and/or one or more alkenylaromatic polymers under anionic conditions in the presence of a di- or tri-functional organic lithium initiator to produce a polyalkadiene defining a multiplicity of lithiated chain ends; (b) reacting the polyalkadiene with an amount of a tri- or di-functional silane coupling agent to form a dendritic polyalkadiene; and (c) hydrogenating the dendritic polyalkadiene to form a substantially saturated dendritic hydrocarbon polymer.

Abstract: Provided is a process for making thermoplastic polymer pellets. The process has the following steps: (a) melting a thermoplastic polymer to form a polymer melt; (b) extruding the melt through a die to form a substantially continuous molten polymer extrudate wherein the die has a contact surface bearing a polymer coating having a surface energy of less than 25 mN/m at 20° C.; (c) cooling the extrudate to form a cooled extrudate; and (d) pelletizing the cooled extrudate to form a plurality of polymer pellets. Provided is also a polymer pellet shipping system and a stable thermoplastic polymer pellet.

Abstract: An oriented thermoplastic elastomer film having reduced permeability and improved fatigue resistance comprising a dynamically vulcanized polymer blend of (A) a halogenated isobutylene elastomer and (B) polyamide, the film is produced by casting or blowing the above polymer blend under the condition such that a shear rate at a die lip for casting or blowing is regulated to control the molecular arrangement in the film, whereby the planar birefringence (PBR) of the resultant film becomes greater or equal to 0.002 and a production process of the same.

Abstract: A durable, flexible, impermeable thermoplastic elastomer composition is produced using a dynamic vulcanization process conducted in a high shear mixer at elevated temperature.

Abstract: A modified inorganic substrate having a plurality of grafts of a polyalkyl acrylate or methacrylate of mean alkyl pendant chain length of 6 to about 40 carbons extending therefrom. The modified inorganic substrate is preferably a modified silica substrate and more preferably modified silica nanoparticles. There is also a process for graft polymerizing a silica substrate.

Abstract: A method for controlling a dispersion size of an elastomer in a thermoplastic elastomer composition having improved durability and impermeability obtained by melt-mixing (A) a halogenated isobutylene elastomer, (B) polyamide and (C) a dispersion aid, and dynamically vulcanizing the resultant blend to form the dynamically vulcanized polymer blend, wherein the halogenated isobutylene elastomer is dispersed in the polyamide matrix at a volume-average dispersion diameter of less than 2.0 ?m.

Abstract: A polyamide resin composition, having an excellent extensibility and flexing fatigue, composed of a polyamide resin (A), as a matrix, and a modifying polymer (C), dispersed therein, having a functional group (B) reactive with the polyamide resin (A), wherein a tensile stress at break of the modifying polymer (C) is 30 to 70% of the tensile stress at break of the polyamide resin (A), and a tensile elongation at break of the modifying polymer (C) is 100 to 500% of the tensile elongation at break of the polyamide resin (A) as well as a pneumatic tire and hose using the same.

Abstract: An article having a fluid permeation prevention layer, such as a pneumatic tire or hose. A tire for example includes an outer tread layer, intermediate sidewall and carcass layers and an innermost air permeation prevention layer: (i) the air permeation prevention (APP) layer having an upper and a lower surface, the layer having a polymer composition exhibiting an air permeation coefficient (APC) of about 25×1O?12 cc cm/cm2 sec cmHg (at 30* C) or less and a Young's modulus of about 1 MPa to about 500 MPa, the polymer composition comprising: (A) at least 10 wt % of at least one. thermoplastic resin component having an APC of about 25×1O?12 cc cm/cm2 sec cmHg (at 30° C.) or less and a Young's modulus of more than 500 MPa, which is preferably a polyamide resin or mixture, and (B) at least 10 wt % of at least one elastomer component having an APC of more than about 25×10?12 cc cm/cm2 sec cmHg (at 30° C.

Abstract: The present invention provides a thermoplastic composition which may be unvulcanized or vulcanized. The thermoplastic composition can be a blend of a thermoplastic engineering resin, a halogenated terpolymer of a C4 to C7 isomonoolefin, a para-alkylstyrene, and a multiolefin. The engineering resin can be a polyamide, such as nylon 6/66 copolymers for example. The isomonoolefin can be an isobutylene for example. The multiolefin can be a C4 to C14 diene, such as isoprene for example.

Abstract: This disclosure relates to a vulcanizable layered composition comprising at least two layers and at least one tie layer, wherein the first layer of the two layers comprises an fluid permeation prevention layer, the second layer of the two layers comprises at least one high diene rubber, and the tie layer comprises a mixture of: (1) about 50 to about 100 weight % of at least one halogenated isobutylene containing elastomer; (2) about 0 to about 50 weight % of at least one high diene elastomer; (3) about 20 to about 50 weight % of at least one filler; (4) about 0 to about 30 weight % of at least one processing oil; (5) about 1 to about 20 parts per hundred (phr) of at least one tackifier; and (6) at least about 0.

Abstract: A thermoplastic elastomer composition comprising a dynamically vulcanized blend of (A) a partially cured halogenated isobutylene elastomer and (B) a polyamide, wherein a tensile modulus at 100% elongation of the halogenated isobutylene elastomer dispersed in the polyamide matrix is less than 0.60 MPa.

Abstract: This invention relates to a vulcanizable layered composition comprising at least two layers and at least one tie layer, wherein the first layer of the two layers comprises an fluid permeation prevention layer, the second layer of the two layers comprises at least one high diene rubber, and the tie layer comprises a mixture of: (1) about 50 to about 95 weight % of at least one halogenated isobutylenecontaining elastomer; (2) about 5 to about 50 weight % of at least one high diene elastomer; (3) about 20 to about 50 weight % of at least one filler; (4) about 0 to about 30 weight % of at least one processing oil; and (5) at least about 0.2 to about 15 parts per hundred of rubber (phr) of a curing system for the elastomers; wherein said fluid permeation prevention layer comprises a polymer composition having an air permeation coefficient of 25×10?12 cc·cm/cm2 sec cmHg (at 30° C.

Abstract: A thermoplastic elastomer composition having improved mechanical properties and fatigue resistance comprising (A) a halogenated isobutylene elastomer, (B) polyamide and (C) an amine component selected from tertiary amines and secondary diamines, wherein the elastomers are dispersed as a domain in a continuous phase of the polyamide.

Abstract: The present invention includes blends of a halogenated elastomer such as a butyl rubber or an interpolymer of, on one embodiment, a C4 to C7 isomonoolefin, a para-methylstyrene and a para-(halomethylstyrene), the interpolymer having been pre-mixed with an exfoliating compound and clay, the entire blend forming a nanocomposite in one embodiment. The clay may or may not have undergone an additional exfoliating treatment prior to blending with the halogenated elastomer. The interpolymer/clay mixture forms a distinct phase in the nanocomposite blend of the invention. The blend of the invention has improved air barrier properties and is suitable as an air barrier.

Abstract: A laminate (C) of a thermoplastic polymer composition comprising: a thermoplastic resin composition (A) having an permeation coefficient of 10×10?12 cc·cm/cm2·sec·cmHg or less, laminated with a thermoplastic polymer composition (B) having a melt viscosity of 500-2000 Pa·s and a Young's modulus at a room temperature of 1-400 MPa, wherein the thickness of a layer of the thermoplastic resin composition (A) is 0.05-10 ?m and the air permeation coefficient of the laminate (C) of 20×10?12 cc·cm/cm2·sec·cmHg or less, and a pneumatic tire using the above laminate (C) as an inner liner.

Abstract: The present invention is a blend of an halogenated elastomer and a clay, desirably an exfoliated clay, to form a nanocomposite suitable for an air barrier. In one embodiment, the halogenated elastomer is a polymer comprising C4 to C7 isoolefin derived units, a para-methylstyrene derived units, and para-(halomethylstyrene) derived units. In another embodiment, the halogenated elastomer is a butyl-type rubber. The clay may or may not have an additional exfoliating treatment present prior to blending with the interpolymer. The interpolymer/clay mixture forms a distinct phase in the nanocomposite blend of the invention. The blend of the invention has improved air barrier properties and is suitable as an innerliner or innertube.

Abstract: This disclosure relates to a vulcanizable layered composition comprising at least two layers and at least one tie layer. The first of the two layers comprises a fluid permeation prevention layer and the second comprises at least one high diene rubber. The tie layer comprises, a mixture, in parts by weight relative to 100 weight parts of rubber of: (1) 10 to 70 parts by weight of epoxidized natural rubber; (2) 30 to 90 parts by weight of at least one high diene elastomer; (3) 20 to 90 parts by weight of at least one filler; (4) 1 to 20 parts by weight of at least one tackifier, —and (5) at least 0.2 to 15 parts by weight of curing system for the elastomers and rubbers; The fluid permeation prevention layer comprises: (A) at least one thermoplastic engineering resin component; and (B) at least one elastomer component, wherein (B) is dispersed in a vulcanized or partially vulcanized state, as a discontinuous phase, in a matrix of component (A).

Abstract: This disclosure relates to a vulcanizable layered composition comprising at least two layers and at least one tie layer, wherein the first layer of the two layers comprises an fluid permeation prevention layer, the second layer of the two layers comprises at least one high diene rubber, and the tie layer comprises a mixture of: (1) about 50 to about 100 weight % of at least one halogenated isobutylene containing elastomer; (2) about 0 to about 50 weight % of at least one high diene elastomer; (3) about 20 to about 50 weight % of at least one filler; (4) about 0 to about 30 weight % of at least one processing oil; (5) about 1 to about 20 parts per hundred (phr) of at least one tackifier; and (6) at least about 0.