Adhesive cement

Abstract

Abstract ADHESIVE COMPOSITIONS COMPRISING A POLYMERIZABLE MONOMERIC ESTER OF X-CYANOACRYLIC ACID ARE SUBSTANTIALLY IMPROVED BY THE ADDITION OF ABOUT 5 TO 25 PARTS BY WEIGHT OF SODIUM FLURIDE. THE COMPOSITIONS PREFERABLY CONTAIN A FINELY-DIVIDED FILLER, AND STILL FURTHER IMPROVEMENT RESULTS FROM THE SELECTION OF A PARTICULAR PARTICLE SIZE FOR THE FILLER, E.G., A MIXTURE CONTAINING A DUBSTANTIAL PROPORTION OF ABOUT 40-50 AND ABOUT 90-100 MICRON SIZE PARTICLES. THE PREFERRED FILL ER IS ALUMINA HAVING ABOUT EQUAL PROPORTIONS OF THE SMALLER AND LARGER PARTICLE SIZES. THESE IMPROVED ADHESIVE COMPOSITIONS ARE ACTIVATED BY AN AMINE CATALYST, PREFERRED FORMS BEING THE TERTIARY AMINES N,N-DIMETHYL-P-TOLUIDINE AND N,N-DIMETHYLANILINE. THEY CAN BE APPLIED TO EITHER DRY OR WET SURFACES OF A VARIETY OF MATERIALS. UPON CURING, THEY EXHIBIT ENHANCED BONDING AND RESISTANCE TO WEAR AND LONG-TERM DETERIORATION, EVEN UNDER SUBMERGED OR OTHERWISE MOIST CONDITIONS. THEY ARE PARTICULARLY SUITABLE FOR THE TREATMENT OF TEETH, E.G., FOR FILLING PITS, CRACKS AND FISSURES TO PREVENT CARIES AND FOR TEMPORARY FILLINGS AND THE PREPARATION OF DENTIAL RESTORATIONS.

Inventors

• 👤 Robert J Adams
• 👤 Wendell C Overhults

Bibliographic Details