Construction comprising tie layer

摘要

A layered structure suitable for use in a pneumatic tire as an innerliner is prepared by directly bonding a fluid permeation prevention film and an adhesive tie layer. Prior to the bonding, the fluid permeation prevention layer is treated to remove any residual plasticizers or oils on the surface of the film. The tie layer comprises 100 weight % of at least one halogenated isobutylene containing elastomer and about 1 to about 20 parts per hundred (phr) of at least one tackifier. The fluid permeation prevention film comprises an elastomeric component dispersed in a vulcanized or partially vulcanized state, as a discontinuous phase, in a matrix of the thermoplastic resin component. The two layers of the layered structure may be separately extruded and then adhered to each other or adhered to each other during a calendaring operation wherein the adhesive tie layer composition is coated onto the treated film.

主权项

1. A process for fabricating a laminate structure comprising the following steps:
(A) forming an adhesive tie composition comprising a mixture of:
(1) 100 weight % of at least one halogenated isobutylene-containing elastomer;(2) about 20 to about 50 weight % of at least one filler;(3) about 0 to about 30 weight % of at least one processing oil;(4) about 1 to about 20 parts per hundred (phr) of at least one tackifier; and;(5) about 0.1 to about 15 parts per hundred of rubber (phr) of a curing system for said elastomers; (B) forming a fluid permeation prevention composition comprising:
(1) 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,(2) 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, halogen-containing rubbers, silicone rubbers, sulfur-containing rubbers, and fluoro-rubbers, and(3) 2 to 30 parts per hundred rubber, based on component (2), of a plasticizerwherein the thermoplastic engineering resin, the elastomer, and the plasticizer are mixed under dynamic vulcanization conditions to disperse the elastomer as a discontinuous phases in a continuous matrix of the thermoplastic engineering resin; (C) forming a film of the fluid permeation prevention composition; (D) treating the fluid permeation prevention film to remove residual plasticizers or oils from the surfaces of the film to form a treated film; and (E) directly coating one surface of the treated film with the adhesive tie composition to form the laminate structure.