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Coated Fiberglass Fabric
The coated fiberglass fabric can protect itself from deterioration in an alkaline environment. The fiberglass fabrics are coated with a composition containing a water-soluble film-forming material. This material has free aliphatic hydroxyl groups in the molecule. A water-soluble ester is formed by reaction of an aromatic carboxylic acid with an alcohol. This composition is cured and dried at elevated temperature so that the cross-link hydroxyl groups of the film-forming material can form a thermoset film coating on the fiberglass fabric. The ester on the fabric functions to protect the coated fiberglass fabric from alkaline attack.