Construction comprising tie layer

A vulcanizable layered composition comprising at least two layers and at least one tie layer, wherein the first layer of the two layers comprises a 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 isobutylene containing 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) 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 a Young's modulus of 1 to 500 MPa, said polymer composition comprising:
• (A) at least 10% by weight, based on the total weight of the polymer composition of at least one thermoplastic engineering resin component having a Young's modulus of more than 500 mPa, where the thermoplastic engineering resin component is selected from the group consisting of polyamide resins, polyester resins, polynitrile resins, polymethacrylate resins, polyvinyl resins, cellulose resins, fluororesins, and imide resins, and
• (B) at least 10% by weight, based on the total weight of the polymer composition, of at least one elastomer component having a Young's modulus of not more than 500 mPa, where the elastomer component is selected from the group consisting of diene rubbers and the hydrogenates thereof, halogen-containing rubbers, silicone rubbers, sulfur-containing rubbers, fluoro-rubbers, hydrin rubbers, acryl rubbers, ionomers and thermoplastic elastomers,
• and where the total amount of the component (A) and the component (B) is not less than 30% by weight based on the total weight of the polymer composition, wherein the elastomer component (B) is dispersed in a vulcanized or partially vulcanized state, as a discontinuous phase, it a matrix of the thermoplastic resin component (A) in the polymer composition.

An article comprising:

• (A) a first layer comprising an elastomer;
• (B) a second layer comprising a dynamically vulcanized alloy of an engineering resin and a copolymer of isoolefin and a para-alkylstyrene;
• and
• (C) a tie layer comprising a mixture of:
• (1) about 50 to about 95 weight % of at least one halogenated isobutylene containing 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) about 0.2 to about 15 parts per hundred of rubber of a curing system for said elastomers;
• wherein said tie layer is located between said first layer and said second layer.

A pneumatic tire comprising an outer tread, sidewall portions, an inner carcass portion adhered to the sidewall portions, a tie layer having a top surface and a bottom surface, and an innerliner layer having a top surface and a bottom surface, wherein the top surface of said innerliner layer is adhered to the bottom surface of said tie layer and the top surface of the tie layer is adhered to the carcass portion, said innerliner layer comprising an engineering resin and said tie layer comprises a mixture of:

• (1) about 50 to about 95 weight % of at least one halogenated isobutylene containing 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) about 0.2 to about 15 parts per hundred of rubber of a curing system for the elastomers.

A process for fabricating a pneumatic tire, the tire comprising a carcass element containing a high diene rubber and an innerliner layer as the innermost layer of said pneumatic tire, the process comprising the steps of

• (A) forming a tie layer from a composition comprising a mixture of comprises a mixture of
• (1) about 50 to about 95 weight % of at least one halogenated isobutylene containing 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) about 0.1 to about 15 parts per hundred of rubber of a curing system for the elastomers;
• (B) forming an innerliner layer comprising a halogenated isomonoolefin-containing elastomer and an engineering resin;
• (C) contacting said tie layer with said carcass element to form a laminated structure;
• (D) containing said innerliner layer with said tire layer to form a further laminated structure;
• and
• (E) forming said structure to the desired shape of a tire and heating said structure under pressure and a temperature of from about 100° C. to about 250° C. for a period of time sufficient to substantially vulcanize said structure.

A pneumatic tire comprising:

• (i) an air permeation prevention layer comprises a polymer composition having an air permeation coefficient of 25×10−12 cc cm/cm2 sec cmHg (at 30° C.) or less and a Young's modulus of 1 to 500 MPa, said polymer composition comprising:
• (A) at least 10% by weight, based on the total weight of the polymer composition of at least one thermoplastic engineering resin component having an air permeation coefficient of 25×10−12 cc-cm/cm2 sec cmHg (at 30° C.) or less and a Young's modulus of more than 500 mPa, where the thermoplastic engineering resin component is selected from the group consisting of polyamide resins, polyester resins, polynitrile resins, polymethacrylate resins, polyvinyl resins, cellulose resins, fluororesins, and imide resins, and
• (B) at least 10% by weight, based on the total weight of the polymer composition, of at least one elastomer component having an air permeation coefficient of more than 25×10−12 cc-cm/cm2 sec cmHg (at 30° C.) or less and a Young's modulus of not more than 500 mPa, where the elastomer component is selected from the group consisting of diene rubbers and the hydrogenates thereof, halogen-containing rubbers, silicone rubbers, sulfur-containing rubbers, fluoro-rubbers, hydrin rubbers, acryl rubbers, ionomers and thermoplastic elastomers,
• and where the total amount of the component (A) and the component (B) is not less than 30% by weight based on the total weight of the polymer composition, wherein the elastomer component (B) is dispersed in a vulcanized or partially vulcanized state, as a discontinuous phase, it a matrix of the thermoplastic resin component (A) in the polymer composition;
• (ii) a layer facing at least one surface of said air permeation prevention layer (i);
• and
• (iii) a tie layer superimposed between said air permeation prevention layer (i) and said facing layer (ii), said tie layer comprising a mixture of:
• (1) about 50 to about 95 weight % of at least one halogenated isobutylene containing 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) about 0.1 to about 15 parts per hundred of rubber of a curing system for the elastomers.

A pneumatic tire comprising:

• (i) an air permeation prevention layer comprising a polymer composition having an air permeation coefficient of about 25×10−12 cc cm/cm2 sec cmHg (at 30° C.) or less and a Young's modulus of about 1 to about 500 MPa, said layer of said polymer composition comprising:
• (A) about 36% by weight, based on the total weight of the polymer composition, of a Nylon 11 and Nylon 6/66 copolymer polyamide resin blend component having an air permeation coefficient of about 25×10−12 cc-cm/cm2 sec cmHg (at 30° C.) or less and a Young's modulus of more than 500 MPa;
• and
• (B) about 53% by weight, based on the total weight of said polymer composition, of a brominated random elastomeric copolymer of isobutylene and about 5 weight % para-methylstyrene comprising about 0.75 weight % bromine, having an air permeation coefficient of more than about 25×10−12 cc-cm/cm2 sec cmHg (at 30° C.) and a Young's modulus of not more than 500 MPa, wherein the elastomeric copolymer (B) is dispersed in a vulcanized state, as a discontinuous phase, in a matrix of the polyamide resin component (A) in said polymer composition;
• (ii) a layer facing at least one surface of said air permeation prevention layer;
• and
• (iii) a tie layer superposed between said air permeation prevention layer and layer (ii) said tie layer comprising a mixture of:
• (1) about 28 weight % of a brominated random copolymer of isobutylene and about 7.5 weight % para-methylstyrene;
• (2) about 28 weight % of natural rubber;
• (3) about 33 weight % of at least one filler;
• (4) about 4 weight % of a naphthenic processing oil;
• and
• (5) about 6 parts per hundred of rubber (phr) of a curing system for said elastomers.