Provisional crown-and-bridge resin containing tetrahydrofuryl methacrylate
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United States of America Patent
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Apr 28, 1981
Grant Date -
N/A
app pub date -
Jan 14, 1980
filing date -
Jan 14, 1980
priority date (Note) -
Expired
status (Latency Note)
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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.
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