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US 5,203,914 AGranted
Dental composition for impression-taking
AssigneeGC Corporation
InventorsShunichi Futami, Hiroshi Kamohara
Life of this patent
Estimating the term…
Abstract
A dental impression composition which contains as a main component 4 to 40% by weight of an acetoacetylated polyvinyl alcohol having an acetoacetylation degree of 0.5 to 15 mol % and a polymerization degree of 100 to 1,500, and additional components 1 to 20% by weight of gelling agents and 20 to 85% by weight of fillers.
Claims9
A dental impression composition which contains
- 4 to 40% by weight of an acetoacetylated polyvinyl alcohol having an acetoacetylation degree of 0.5 to 15 mol % and a polymerization degree of 100 to 1,500,
- 1to 20% by weight of a gelling agent comprising one or more members selected from the group consisting of aldehyde, hydrazides and amines and
- 20 to 85% by weight of fillers comprising one or more members selected from the group consisting of titanium oxide, silica, alumina and basic aluminum sulfate, all having a mean particle size of 1 m.mu. to 5 .mu.m and a pH value of 7.0 or less.
A dental impression material which comprises
- material A formed of a paste containing
- 2 to 20% by weight of an acetoacetylated polyvinyl alcohol having an acetoacetylation degree of 0.5 to 15 mol % and a polymerization degree of 100 to 1,500,
- 5 to 60% by weight of filler comprising one or more members selected from the group consisting of titanium oxide, silica, alumina and basic aluminum sulfate, all having a mean particle size of 1 m.mu. to 5 .mu.m and a pH value of 7.0 or less, and the balance being water, and
- material B formed of a paste containing
- 0. 5 to 15% by weight of a gelling agent comprising one or more members selected from the group consisting of aldehydes, hydrazides and amines,
- 5 to 60% by weight of filler comprising one or more members selected from the group consisting of titanium oxide, silica, alumina and basic aluminum sulfate, all having a mean particle size of 1 m.mu. to 5 .mu.m and a pH value of 7.0 or less, and
- the balance being water.
4 more elements
Dependencies are inferred from the claim text.