Dental adhesive composites
US4107845A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1976 |
| Grant date | Aug 22, 1978 |
| Priority date | — |
| Expiry date | Dec 16, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K7/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
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 erosi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.