Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1995-03-14
1997-11-18
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526227, 5262305, 526328, C08F 444, C08F 434, C08F 2010, C09J13306
Patent
active
056888830
ABSTRACT:
The invention provides a polymerizable composition formed by mixing a liquid and a powder composition. The liquid composition includes a peroxide, which decomposes by at most fifty percent by weight of the peroxide within 10 hours at a temperature of at least 75.degree. C., and a polymerizable monomer. The powder composition comprising a proton donor, and a metal containing compound. The polymerizable composition has from 0.2 to 5 percent by weight of the peroxide, from 5 to 99 percent by weight of the polymerizable monomer, and from 0.1 to 3 percent by weight of the proton donor, and from 0.02 to 3 percent by weight of the metal containing compound. The polymerizable composition has an initial setting time and a storage setting time after storage of the first (liquid) composition for at least 12 months at a temperature of at least 23.degree. C. The initial setting time is within 2 minutes of the storage setting time.
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Klee Joachim E.
Walz Uwe
Bieber James B.
Cheng Wu C.
Dentsply GmbH
Lovercheck Dale R.
Schofer Joseph L.
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