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US 4,381,947 AGranted
Settable alginate compositions
AssigneeLaclede Professional Products, Inc.
InventorMichael A. Pellico
Life of this patent
Estimating the term…
Abstract
An oral, settable, dental composition is prepared by interacting Component A containing an alkali metal alginate in an aqueous paste with Component B containing a divalent metal salt such as calcium sulfate and a reaction rate retarder such as tetrasodium pyrophosphate in a fluid plasticizer paste that is substantially free of unbound water.
Claims24
A two-component system interactable to form an oral, settable, dental composition comprising:
- (i) Component A consisting essentially of an alkali metal alginate selected from the group consisting of sodium alginate, potassium alginate and mixtures thereof in an aqueous paste;
- and
- (ii) Component B consisting essentially of a slightly water soluble, divalent metal salt and a reaction rate retarder in a fluid plasticizer paste that is substantially free of unbound water, said Component B being so formulated that a pre-selected quantity thereof contains from about 0.5 to about 1.2 parts by weight of divalent metal salt per 1.0 part by weight of alkali metal alginate in Component A, said reaction rate retarder being present in an amount from about 0.02 to about 0.13 part by weight per 1.0 part by weight of said divalent metal salt, and said fluid plasticizer being present in an amount from about 0.75 to about 2 parts by weight per 1.0 part by weight of said divalent metal salt, wherein:
- said divalent metal salt is a member selected from the group consisting of calcium sulfate, ferrous sulfate, zinc sulfate, divalent metal salt of fatty acid and mixtures thereof,
- said reaction rate retarder is a member selected from the group consisting of phosphate, pyrophosphate, citrate and silicate salts of sodium, potassium and mixtures thereof, and
- said fluid plasticizer is a member selected from the group consisting of glycerol, propylene glycol, polyether glycol, oleyl alcohol, silicone oil, mineral oil, vegetable oil and mixtures thereof.
3 more elements
A method for preparing an oral, settable, dental composition which comprises interacting:
- (i) Component A consisting essentially of an alkali metal alginate selected from the group consisting of sodium alginate, potassium alginate and mixtures thereof in an aqueous paste;
- and
- (ii) Component B consisting essentially of a slightly water soluble, divalent metal salt and a reaction rate retarder in a fluid plasticizer paste that is substantially free of bound water, said divalent metal salt being present in an amount from about 0.5 to about 1.2 parts by weight per 1.0 part by weight of alkali metal alginate, said reaction rate retarder being present in an amount of about 0.02 to about 0.13 part by weight per 1.0 part by weight of said divalent metal salt, and said fluid plasticizer being present in an amount from about 0.75 to about 2 parts by weight per 1.0 part by weight of said divalent metal salt, wherein:
- said divalent metal salt is a member selected from the group consisting of calcium sulfate, ferrous sulfate, zinc sulfate, divalent metal salt of fatty acid and mixtures thereof,
- said reaction rate retarder is a member selected from the group consisting of phosphate, pyrophosphate, citrate and silicate salts of sodium, potassium and mixtures thereof, and
- said fluid plasticizer is a member selected from the group consisting of glycerol, propylene glycol, polyether glycol, oleyl alcohol, silicone oil, mineral oil, vegetable oil and mixtures thereof.
3 more elements
A solid, coherent, dental composition prepared by interacting:
- (i) Component A consisting essentially of an alkali metal alginate selected from the group consisting of sodium alginate, potassium alginate and mixtures thereof in an aqueous paste;
- and
- (ii) Component B consisting essentially of a slightly water soluble, divalent metal salt and a reaction rate retarder in a fluid plasticizer paste that is substantially free of bound water, said divalent metal salt being present in an amount from about 0.5 to about 1.2 parts by weight per 1.0 part by weight of alkali metal alginate, said reaction rate retarder being present in an amount from about 0.02 to about 0.13 part by weight per 1.0 part by weight of said divalent metal salt and said fluid plasticizer being present in an amount from about 0.75 to about 2 parts by weight per 1.0 part by weight of said divalent metal salt, wherein:
- said divalent metal salt is a member selected from the group consisting of calcium sulfate, ferrous sulphate, zinc sulfate, divalent metal salt of fatty acid and mixtures thereof,
- said reaction rate retarder is a member selected from the group consisting of phosphate, pyrophosphate, citrate and silicate salts of sodium, potassium and mixtures thereof, and
- said fluid plasticizer is a member selected from the group consisting of glycerol, propylene glycol, polyether glycol, oleyl alcohol, silicone oil, mineral oil, vegetable oil and mixtures thereof.
3 more elements
Dependencies are inferred from the claim text.