The invention relates to a redox initiator system which allows dental formulations to be cured in acidic medium by way of a free-radical polymerization and which ensures a high level of adhesion of the polymerizing composition to the hard substances of the teeth, namely enamel and, in particular, dentine.
The redox initiator system comprises the following constituents:
(A) from 14.9 to 50% by weight of a barbituric acid or thiobarbituric acid and/or of a barbituric or thiobarbituric acid derivative,
(B) from 30 to 75% by weight of a peroxodisulfate compound and/or peroxodiphosphate compound,
(C) from 10 to 35% by weight of a sulfinic acid compound, and
(D) from 0.1 to 5% by weight of a copper compound.
本发明涉及一种氧化还原
引发剂体系,该体系可使牙科配方在酸性介质中通过自由基聚合作用固化,并确保聚合组合物与牙齿的硬质物质(即珐琅质,尤其是牙本质)高度粘合。
氧化还原
引发剂体系包括以下成分:
(A) 按重量计,14.9%至 50%的
巴比妥酸或
硫代
巴比妥酸和/或
巴比妥酸或
硫代
巴比妥酸衍
生物、
(B) 30%至 75%(以重量計)的過二
硫酸鹽化合物及/或過二
磷酸鹽化合物、
(C) 10%至 35%(重量百分比)的
亚硫酸化合物,以及
(D) 0.1%至 5%(重量百分比)的
铜化合物。