发明名称 |
COMPOSITE OPTICAL ARTICLES |
摘要 |
Provided is a composite optical article including (a) a polymeric base layer comprising a sulfur-containing urethane-based material having a refractive index of at least 1.57; and (b) a polymeric outer layer cast over a surface of the base layer (a) comprising (i) a poly(urea-urethane) material having a refractive index of less than 1.57, and (ii) a photochromic compound and/or a static dye. The thickness of the base layer (a) is greater than the thickness of the outer layer (b). |
申请公布号 |
US2012224139(A1) |
申请公布日期 |
2012.09.06 |
申请号 |
US201213410370 |
申请日期 |
2012.03.02 |
申请人 |
RETSCH, JR. WILLIAM H.;PPG INDUSTRIES OHIO, INC. |
发明人 |
RETSCH, JR. WILLIAM H. |
分类号 |
G02C7/10;B32B7/02;G02B1/10;G02B5/30 |
主分类号 |
G02C7/10 |
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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