Glass compositions, fibers and methods of making same

Details Glass compositions, fibers and methods of making same Glass compositions, fibers and methods of making same

1974-08-22

1977-05-31

Garvin, Patrick P.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 52, C03C 1300, C03C 304

Patent

active

040267156

ABSTRACT:
This disclosure relates to fiberizable glass compositions, fibers and the method of making textile glass fibers which are boron and fluorine free. Boron and fluorine have now been recognized as potential pollutants in the manufacture of fiberizable glasses and glass fibers and the following disclosure eliminates these pollutants by substituting TiO.sub.2, MgO and ZnO in the basic three component glass composition of SiO.sub.2, Al.sub.2 O.sub.3 and CaO. The preferred glass composition consists essentially of, by weight, 54.5 to 60% SiO.sub.2, 9 to 14.5% Al.sub.2 O.sub.3, 17 to 24% CaO, 2 to 4% TiO.sub.2, 1.5 to 4% MgO and 1 to 6% RO, wherein RO is an oxide selected from the group consisting of ZnO, SrO and BaO, calculated as ZnO. The preferred composition may also include alkali metal oxides selected from the group consisting of Na.sub.2 O, K.sub.2 O and Li.sub.2 O.

REFERENCES:
patent: 3095311 (1963-06-01), Wranau
patent: 3673049 (1972-06-01), Giffen et al.
patent: 3783092 (1974-01-01), Majumdar
patent: 3847626 (1974-11-01), Erickson et al.
patent: 3847627 (1974-11-01), Erickson et al.
patent: 3876481 (1975-04-01), Erickson et al.

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