BARRIER COATING OF A POLYMER AND A DISPERSED LAYERED FILLER, A METHOD OF COATINGPARTICLES WITH SAID BARRIER COATING AND COATED COMPOSITIONS, PARTICULARY TIRES.

摘要

Barrier coating mixtures contain in a carrier liquid (a) an elastomeric (preferably butyl-containing) polymer; (b) a dispersed exfoliated layered filler having an aspect ratio greater than 25; and (c) at least one surfactant, wherein the solids content of the mixture is less than 30 % and the ratio of polymer (a) to filler (b) is between 20:1 and 1:1. Coated articles, which are rigid or flexible and elastomeric, and free-standing films and membranes, which are flexible and elastomeric, are produced using the barrier coating mixtures. For example, a tire is provided which has on a surface or at the interface of two surfaces therein, or replacing or reducing a surface (e.g., an innerliner) a barrier coating formed by such a barrier coating mixture. Methods of manufacturing or repairing tires and enhancing retreaded tires are also encompassed.