发明名称 |
Photochromic composition. |
摘要 |
<p>A photochromic composition comprises (A) 100 parts by weight of a compound having at least one epoxy group in the molecule and (B) 0.0001 to 10,000 parts by weight of a photochromic compound. The compound (A) is of formula <CHEM> wherein A is a residue of an n-valent alcoholic hydroxylcontaining compound, a residue of an n-valent phenolichydroxyl-containing compound, or a residue of an n-valent carboxylic acid, R<1> is hydrogen or methyl and n is an integer of 1 to 4. The photochromic compounds (B) include fulgide compounds, spirooxazine compounds and chromene compounds. A polymer obtained by polymerizing the above photochromic composition of the invention by a radical polymerization method has a good durability of photochromic properties, and also possesses a dark color-forming density, a fast color fading speed, is transparent, and has a high surface hardness. Thus, especially, the polymer is suitable for use as a photochromic lens.</p> |
申请公布号 |
EP0619358(A1) |
申请公布日期 |
1994.10.12 |
申请号 |
EP19940110286 |
申请日期 |
1993.03.03 |
申请人 |
TOKUYAMA CORPORATION |
发明人 |
KOBAYAKAWA, TAKASHI, TOKUYAMA CORPORATION;IMURA, SATOSHI, TOKUYAMA CORPORATION;ITONAGE, KAZUMASA, TOKUYAMA CORPORATION;KURAMOTA, KAZUHIKO, TOKUYAMA CORPORATION |
分类号 |
C09K9/02;G03C1/73;(IPC1-7):C09K9/02 |
主分类号 |
C09K9/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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