	US 12,460,021 B2
	Glass powder and chemical polymerization initiator
Keita Sato, Tokyo (JP); Atsushi Fujimi, Tokyo (JP); Shogo Murakami, Tokyo (JP); and Ayaka Fujimoto, Tokyo (JP)
Assigned to GC Corporation, Shizuoka (JP)
Appl. No. 17/753,565
Filed by GC Corporation, Shizuoka (JP)
PCT Filed Aug. 19, 2020, PCT No. PCT/JP2020/031328 § 371(c)(1), (2) Date Mar. 8, 2022, PCT Pub. No. WO2021/049269, PCT Pub. Date Mar. 18, 2021.
Claims priority of application No. 2019-167007 (JP), filed on Sep. 13, 2019.
Prior Publication US 2022/0332857 A1, Oct. 20, 2022
Int. Cl. C08F 4/68 (2006.01); A61K 6/836 (2020.01); A61K 6/887 (2020.01); C08F 4/58 (2006.01); C08F 122/22 (2006.01)

CPC C08F 4/68 (2013.01) [A61K 6/836 (2020.01); A61K 6/887 (2020.01); C08F 4/58 (2013.01); C08F 122/22 (2013.01)]

1 Claim

1. A polymerization initiator composition comprising:

a glass powder including aluminum, silicon, strontium, fluorine, phosphorus, and at least one of copper or vanadium; and

a chemical polymerization initiator,

wherein, in the glass powder,

a content of silicon, when converted into an amount of silicon oxide SiO₂, is 20% by mass or more and 50% by mass or less,

a content of aluminum, when converted into an amount of aluminum oxide Al₂O₃, is 20% by mass or more and 40% by mass or less,

a content of strontium, when converted into an amount of strontium oxide SrO, is 15% by mass or more and 40% by mass or less,

a content of fluorine is 1% by mass or more and 30% by mass or less,

a content of phosphorus, when converted into an amount of phosphorus oxide P₂O₅, is 0.1% by mass or more and 15% by mass or less, and

a content of at least one of copper or vanadium, when converted into an amount of copper oxide CuO or vanadium oxide V₂O₅, is 0.1% by mass or more and 5% by mass or less.