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US 4,045,601 AGranted
Solvent finishing of fiber glass fabrics
AssigneePPG Industries, Inc.
InventorsGeorge L. Brodmann, Carl Nelson Schlatter
Life of this patent
Estimating the term…
Abstract
Woven fiber glass fabric is simultaneously resin finished and dyed in a rapid process which impregnates the fabric with a liquid finishing media of low surface tension and high volatility containing dyes and dissolved resins in a halogenated hydrocarbon solvent.
Claims8
A non-aqueous process for resin finishing and dyeing woven fiber glass fabric which comprises the steps of sequentially:
- A. impregnating the fabric with a liquid pre-finishing composition having a surface tension of less than 30 dynes/cm. at 25.degree. C.;
- which composition comprises (1) 0.1 to 5.0 weight percent of solvent soluble glass-reactive low molecular weight organosilicon compound and (2) organic solvent having a boiling point of 50.degree. C. to 150.degree. C. at 760 mm Hg pressure;
- B. volatilizing a major portion of the organic solvent from the fabric;
- C. impregnating the fabric with a liquid finishing composition having a surface tension of less than 30 dynes/cm. at 25.degree. C.;
- and a viscosity of less than 1,000 centipoises at 25.degree. C.;
- which composition comprises (1) 0.5 to 10.0 weight percent of solvent soluble synthetic resin selected from the group consisting of polyacrylics, polyurethanes, polyesters, and polysilicones;
- (2) pigment dye;
- and (3) single phase solvent comprising at least 90 percent by weight of aliphatic chlorinated hydrocarbon having 1 to 4 carbon atoms and no more than 5 chlorine atoms, said solvent having a boiling point between 50.degree. C. to 150.degree. C. at 760 mm Hg pressure;
- then
- D. volatilizing a major portion of the aliphatic chlorinated solvent from the fabric thereby depositing resin and dye on the fabric.
7 more elements
Dependencies are inferred from the claim text.