Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1974-08-07
1976-07-06
Husack, Ralph
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
427390, 427412, 427419, 428422, 428432, C03C 2502, B32B 1710
Patent
active
039682978
ABSTRACT:
Coated glass fabric of improved flex life is provided, the coating on the fabric comprising (a) unsintered polytetrafluoroethylene having a specific melt viscosity of at least 1 .times. 10.sup.9 poises at 380.degree.C. and (b) a condensation product of a polyhydrolyzable compound which is a compound of tetravalent titanium, zirconium, or tin. The coating can also contain a water repellent additive which prevents water from soaking into the fabric. The coating is present on the glass fabric either as a blend of (a) and (b) or as a basecoat of (b) and topcoat of (a) on the glass fabric. The blend coating can be obtained by applying a dispersion of (a) which contains (b) still in the polyhydrolyzable state, and optionally, the water repellent additive, to the fabric, followed by drying without sintering the polytetrafluoroethylene.
REFERENCES:
patent: 2592147 (1952-04-01), Ikeda
patent: 2980719 (1961-04-01), Haslam
patent: 3057754 (1962-10-01), Rowen et al.
patent: 3090701 (1963-05-01), Shulver et al.
patent: 3467612 (1969-09-01), Gagliardi
patent: 3560243 (1971-02-01), Seifert et al.
patent: 3627565 (1971-12-01), Plueddemann
patent: 3730759 (1973-05-01), Marzocchi
patent: 3787281 (1974-01-01), Effenberger
patent: 3790403 (1974-02-01), Ribbans
E. I. Du Pont de Nemours and Company
Husack Ralph
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