Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1976-12-16
1978-08-22
Derrington, James H.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
260 4217, 260 4228, 260 4252, 26099811, C08K 702
Patent
active
041078454
ABSTRACT:
Adhesive dental restorative composite comprising a suspension of filler fibers in a liquid polyacrylate resin composition wherein the resin has a viscosity of less than 5000 centipoise. The fibers which may be organic or inorganic generally have lengths of 1 to 100 microns and diameters which are from 1/20 to 1/5 of the lengths. An amine accelerator and a peroxide catalyst for the acrylate resin are included in the composite. The fibers comprise from 30% to 70% by weight of the composite.
The referred resin formulation comprises from 25% to 90% by weight of a polyethyleneglycol diacrylate and from 10% to 75% by weight of an aromatic or alicyclic polyacrylate compound.
An especially preferred composite is one wherein the resin comprises 40 parts triethyleneglycol dimethacrylate to 60 parts bisphenol-A-bis(3-methacrylato-2-hyroxypropyl) ether having suspended therein calcium silicate fibers having an average length of 5.5 microns, and in which 97% by weight of the fibers have a length less than 20 microns, and 94% a length less than 10 microns. The calcium silicate fibers comprise 55% by weight of the composite.
The composite is particularly useful as a restorative for areas of erosion on teeth, especially gingival erosion in enamel.
REFERENCES:
patent: 3066112 (1962-11-01), Bowen
patent: 3503128 (1970-03-01), Boyd
patent: 3539533 (1970-11-01), Lee et al.
Modern Plastics Encyclopedia 1967, Sep. 1966, vol. 44, vol. A, pp. 599-602, 611-612 & 614.
Lee, Jr. Henry L.
Orlowski Jan Alexander
Derrington James H.
Lee Pharmaceuticals
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