Fluorine-free calcium-aluminosilicate glasses

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United States of America Patent

PATENT NO 4438212
SERIAL NO

06392668

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Abstract

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The invention relates to calciumaluminosilicate glasses. The glasses contain, in weight percent, 25 to 35% silica, 27 to 35% calcium oxide, 25 to 40% alumina, 0 to 4% of alkali metal oxide selected from lithium oxide, sodium oxide and potassium oxide, and 0 to 5% of titanium oxide and a total content of lithium, sodium, potassium and titanium oxides of 0.5 to 9%. The glasses, in finely divided form, react with aqueous polycarboxylic acids and set to a solid mass; cements made from the glass and polycarboxylic acids are useful in splinting compositions.

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Patent Owner(s)

  • PILKINGTON BROTHERS P.L.C.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Barclay, Andrew C Harlow, GB2 2 16
Dunning, Reginald Parbold near Wigan, GB2 2 16
Parry, Richard J Southport, GB2 2 16
Potter, William D Bishops Stortford, GB2 18 742

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