Dental compositions with fluorescent pigment
US-9205029-B2 · Dec 8, 2015 · US
Curable composition
US2020121564A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2020121564-A1 |
| Application number | US-201816605602-A |
| Country | US |
| Kind code | A1 |
| Filing date | Apr 16, 2018 |
| Priority date | Apr 18, 2017 |
| Publication date | Apr 23, 2020 |
| Grant date | — |
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Abstract
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Provided is a curable composition comprising a polymerizable monomer (A); spherical particles (B) having an average primary-particle diameter in a range of 230 nm to 1,000 nm; and a polymerization initiator (C), in which 90% or more of individual particles constituting the spherical particles (B) lies in a range of ±5% based on the average primary-particle diameter, and the refractive index of the spherical particles (B) is larger than the refractive index of a polymer of the polymerizable monomer (A). When a 1 mm-thick cured product is formed from the curable composition and the Y value (Yb) of the colored light of the cured product on a black background and the Y value (Yw) of the colored light of the cured product on a white background are each measured using a color difference meter, the ratio therebetween, Yb/Yw, being within a range of 0.2 to 0.5.
First claim
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1 . A curable composition comprising a polymerizable monomer (A); spherical particles (B) having an average primary-particle diameter in a range of 230 nm to 1,000 nm; and a polymerization initiator (C), wherein 90% or more of individual particles constituting the spherical particles (B) lies in a range of ±5% based on the average primary-particle diameter, the polymerizable monomer (A) and the spherical particles (B) satisfy requirement (X1) represented by the following formula (1): nP<nF (1) in formula (1), nP represents a refractive index at 25° C. of a polymer obtained by polymerizing the polymerizable monomer (A); and nF represents a refractive index at 25° C. of the spherical particles (B), and when a 1 mm-thick cured product is formed from the curable composition and the Y value (Yb) of the colorimetric value according to the Munsell Color System of the colored light of the cured product on a black background and the Y value (Yw) of the colorimetric value according to the Munsell Color System of the colored light of the cured product on a white background are each measured using a color difference meter, the ratio therebetween, Yb/Yw, being within a range of 0.2 to 0.5. 2 . The curable composition according to claim 1 , wherein the average primary-particle diameter of the spherical particles (B) is in a range of 240 nm to 500 nm. 3 . The curable composition according to claim 1 , wherein the difference between the refractive index nF at 25° C. of the spherical particles (B) and the refractive index nP at 25° C. of a polymer of the polymerizable monomer (A) is 0.001 or more. 4 . The curable composition according to claim 1 , comprising inorganic particles (D) having an average primary-particle diameter of less than 100 nm. 5 . A dental filling restorative material consisting of the curable composition according to claim 1 .
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Classifications
comprising non-metallic elements or compounds thereof, e.g. carbon · CPC title
Particle size · CPC title
Zirconium oxide · CPC title
- A61K6/887Primary
Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title
comprising inorganic cements · CPC title
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Frequently asked questions
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- What does patent US2020121564A1 cover?
- Provided is a curable composition comprising a polymerizable monomer (A); spherical particles (B) having an average primary-particle diameter in a range of 230 nm to 1,000 nm; and a polymerization initiator (C), in which 90% or more of individual particles constituting the spherical particles (B) lies in a range of ±5% based on the average primary-particle diameter, and the refractive index of …
- Who is the assignee on this patent?
- Tokuyama Dental Corp
- What technology area does this patent fall under?
- Primary CPC classification A61K6/887. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Thu Apr 23 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).