PHOTOCHROMIC LENS

• US 20140036334A1
• Filed: 03/30/2012
• Published: 02/06/2014
• Est. Priority Date: 03/30/2011
• Status: Active Grant

• Current Assignee: Hoya Corporation
• Original Assignee: Hoya Corporation
• Inventors: Ohnishi, Tomofumi
• Granted Patent: US 8,902,487 B2
• Time in Patent Office: Days
• US Class Current: 359/241
• CPC Class Codes: C08K 5/34926 also containing heterocyclic groups other than triazine groups
• CPC Class Codes: C08L 2201/10 Transparent films; Clear coatings; Transparent materials
• CPC Class Codes: G02B 1/041 Lenses
• CPC Class Codes: G02B 5/23 Photochromic filters
• CPC Class Codes: G02C 7/102 Photochromic filters
• CPC Class Codes: G03C 1/73 containing organic compounds
• CPC Class Codes: G03C 1/733 with macromolecular compounds as photosensitive substances, e.g. photochromic photodegradable or photocrosslinkable compositions G03F7/004

Abstract

The present invention relates to a photochromic lens, which comprises a photochromic layer comprising a photochromic dye and a resin component, and an organic hardcoat layer in this order, wherein the resin component is an acrylic resin, and the photochromic layer further comprises a piperidine ring-containing compound having a molecular weight of equal to or greater than 1,000.

Claims

1. A photochromic lens, which comprises:

a photochromic layer comprising a photochromic dye and a resin component, and an organic hardcoat layer in this order, wherein

the resin component is an acrylic resin, and

the photochromic layer further comprises a piperidine ring-containing compound having a molecular weight of equal to or greater than 1,000.

2. The photochromic lens according to claim 1, wherein the piperidine ring-containing compound is a hindered amine.

3. The photochromic lens according to claim 1, wherein the molecular weight of the piperidine ring-containing compound is equal to or lower than 4,000.

4. The photochromic lens according to claim 1, wherein the organic hardcoat layer comprises an organic silicon compound and metal oxide particles.

5. The photochromic lens according to claim 2, wherein the molecular weight of the piperidine ring-containing compound is equal to or lower than 4,000.

6. The photochromic lens according to claim 2, wherein the organic hardcoat layer comprises an organic silicon compound and metal oxide particles.

7. The photochromic lens according to claim 3, wherein the organic hardcoat layer comprises an organic silicon compound and metal oxide particles.

8. The photochromic lens according to claim 5, wherein the organic hardcoat layer comprises an organic silicon compound and metal oxide particles.