Dental glass ionomer cement compositions
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United States of America Patent
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Nov 5, 1991
Grant Date -
N/A
app pub date -
Dec 11, 1989
filing date -
Dec 16, 1988
priority date (Note) -
Expired
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Abstract
A dental glass ionomer cement composition comprises: (a) 5 to 100 parts by weight of a polymer of an .alpha.-.beta. unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000, (b) 5 to 100 parts by weight of a fluoroaluminosilicate glass powder having an average particle size of 0.02 to 10 .mu.m and a specific gravity of 2.4 to 4.0 and capable of reacting with said 'polymer of an .alpha.-.beta. unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000', (c) 5 to 100 parts by weight of a polymerizable unsaturated organic compound having at least one CH.sub.2 .dbd.C(R1)--COO--group wherein R1=H or CH.sub.3, (d) 0.01 to 5 parts by weight of a polymerization catalyst, (e) 2 to 50 parts by weight of water, (f) 0.01 to 20 parts by weight of a surface active agent, and (g) 0.01 to 5 parts by weight of a reducing agent, and optionally h. 0 to 50 parts by weight of an inorganic filler having an average particle size of 0.02 to 10 .mu.m and undergoing no reaction with said 'polymer of an .alpha.-.beta. unsaturated carboxylic acid having a weight average molecular weight of 5,000 to 40,000'.
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