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PHOTOCHROMIC ARTICLES CONTAINING AS ACTIVE INGREDIENT DERIVATIVES OF INDOLO-SPIRO (BENZO AND NAPHTHO) (1,1-6)(1,4) OXAZINES
PHOTOCHROMIC ARTICLES CONTAINING AS ACTIVE INGREDIENT DERIVATIVES OF INDOLO-SPIRO (BENZO AND NAPHTHO) (1,1-6)(1,4) OXAZINES
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机译:包含吲哚-螺(苯并和萘)(1,1-6)(1,4)恶嗪的活性成分的光致色素
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摘要
A plastic organic photochromic article, typically a lens such as an ophthalmic lens or a window such as a vehicle roof light, comprising a plastics host material having a photochromic compound incorporated therein or applied thereto, the article being characterised in that it exhibits the following properties, measured at Air Mass 2 at 25 DEG C: (a) an integrated visible transmission in the faded state (B.IVT) ranging from 90 to 25%, (b) an integrated visible transmission in the darkened state (D.IVT) ranging from 1 to 50%, preferably 4 to 30%, (c) the rate of darkening of the article when it is exposed to actinic radiation is such that 88% of the darkening range is achieved in 30 seconds or less, i.e.T8830 secs, (d) the rate of fading of the article from its fully darkened condition is such that more than 60% of the optical density range is recovered in 60 seconds, i.e. % ODG-1 60%, and (e) the induced optical density of the article, i.e. the change in the optical density of the article, in moving from the faded state (B.IVT) to the darkened state (D.IVT), is greater than 0.45. Typically, the photochromic compound is a spiro-oxazine compound of general formula (II), CHEM D
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机译:一种塑料有机光致变色制品,通常是诸如眼科镜片之类的透镜或诸如车顶灯之类的窗户,其包含其中掺入或施加有光致变色化合物的塑料主体材料,其特征在于,它具有以下性能,在空气质量2于25℃下测得:(a)衰减状态(B.IVT)的积分可见光透射率介于90%到25%之间,(b)深色状态(D.IVT)的积分可见光透射率范围为1至50%,优选为4至30%。(c)制品在暴露于光化辐射下的变暗率使得在30秒或更短的时间内即88秒内达到88%的变暗范围,(d)制品从其完全变暗的状态的褪色速率应使60秒内恢复到60%以上的光密度范围,即%ODG-1 60%,并且(e)诱导的光密度制品的光密度,即关节的光密度的变化从衰落状态(B.IVT)移至黑暗状态(D.IVT)时,le大于0.45。通常,光致变色化合物是通式(II)的螺恶嗪化合物, D
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