Alkali-resistant compositions for forming glass fibers

Details Alkali-resistant compositions for forming glass fibers Alkali-resistant compositions for forming glass fibers

1976-05-19

1977-10-18

Douglas, Winston A.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 50, 106 99, C03C 1300, C03C 304

Patent

active

040544729

ABSTRACT:
Alkali-resistant compositions for forming glass fibers characterized by comprising, in molecular weight percentage, 58-77% of SiO.sub.2, 4-11% of ZrO.sub.2, 16-24% of an alkali metal oxide and 0.5-3.5% of at least one oxide selected from the group consisting of oxides of iron and oxides of copper, with the proviso that the molecular weight percentages of the oxides of iron and the oxides of copper are calculated in terms of the chemical formulas Fe.sub.2 O.sub.3 and CuO, respectively. Alkali-resistant compositions for forming glass fibers characterized by comprising in molecular weight percentage, 56-74% of SiO.sub.2, 4-6.9% of ZrO.sub.2, 11-20% of an alkali metal oxide, 0.5-3.5% of at least one oxide selected from the group consisting of oxides of iron and oxides of copper with the proviso that the molecular weight percentages of the oxides of iron and the oxides of copper are calculated in terms of the chemical formulas Fe.sub.2 O.sub.3 and CuO, respectively, and up to 12% of an alkaline earth metal oxide.

REFERENCES:
patent: 2877124 (1959-03-01), Welsh
patent: 3840379 (1974-10-01), Wolf
patent: 3861926 (1975-01-01), Irlam et al.
patent: 3861927 (1975-01-01), Kimura et al.
patent: 3928049 (1975-12-01), Otouma et al.
patent: 3973974 (1976-08-01), Otouma et al.

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