Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1980-01-14
1981-04-28
Seccuro, Carman J.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 457R, 260 4595R, 525206, 525228, 525259, 525284, 525309, C08F26506, C08L 3314
Patent
active
042644895
ABSTRACT:
A provisional crown-and-bridge resin comprising a liquid resin component and a powder component. The liquid resin component contains tetrahydrofurfuryl methacrylate as a major ingredient and is free from methyl methacrylate. It also contains an anti-oxidant and an accelerator. The powder component contains poly (ethyl methacrylate) as a major ingredient and a curing agent for the resin component. The powder is mixed with the resin shortly before application at a ratio of about two to about five parts of powder to one part of liquid resin by weight, to give a suitably flowing mixture. The resin component may also contain ethyl methacrylate as a major ingredient and may contain ethoxylated bisphenol A dimethacrylate as a major ingredient. The powder may include a substantial proportion of amorphous silica and preferably incorporates a substantial amount of X-ray opaque barium glass.
REFERENCES:
patent: 3265768 (1966-08-01), Mottus et al.
patent: 3468977 (1969-09-01), Bruckmann et al.
patent: 4001939 (1977-01-01), Gross
Reinhardt-"Improving the Onlay Temporary Restoration", Dental Student, vol. 57, No. 4, Jan. 1979, pp. 54-55.
Glace William R.
Ibsen Robert L.
Den-Mat, Inc.
Seccuro Carman J.
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