申请人:Mitsui Toatsu Chemicals, Inc.
公开号:US05646273A1
公开(公告)日:1997-07-08
A phthalocyanine represented by the formula (1) ##STR1## wherein each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is independently an alkyl group substituted by 0 to 5 halogen atoms and having 1 to 20 carbon atoms, an alkenyl group substituted by 0 to 5 halogen atoms and having 2 to 20 carbon atoms or an alkynyl group substituted by 0 to 5 halogen atoms and having 2 to 20 carbon atoms, and at least one of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is substituted by the halogen atom; X is a halogen atom; each of k, l, m and n is independently a value of from 0 to 3; each of o, p, q and r is independently a value of 0, 1 or 2, and all of them are not 0 simultaneously; each sum of k and o, l and p, m and q, and n and r is independently in the range of from 0 to 4; Met is two hydrogen atoms, a divalent metal atom, a trivalent mono-substituted metal atom, a tetravalent di-substituted metal atom or an oxy-metal atom; an optical recording medium formed by adding this phthalocyanine to a recording layer; and a near infra-red absorbing agent comprising the phthalocyanine. The above-mentioned phthalocyanine can be used to provide the optical recording medium having excellent characteristics of reflectance, sensitivity, recording properties, stability to reproduction light, shelf stability and the like.
化学式为(1)的酞菁,其中R1、R2、R3和R4各自独立地表示具有1到20个碳原子的取代了0至5个卤素原子的烷基、具有2到20个碳原子的取代了0至5个卤素原子的烯基或具有2到20个碳原子的取代了0至5个卤素原子的炔基,且R1、R2、R3和R4中至少有一个被卤素原子取代;X表示卤素原子;k、l、m和n各自独立地为0到3的值;o、p、q和r各自独立地为0、1或2的值,且它们不同时为0;k和o、l和p、m和q以及n和r的每个和分别在0到4的范围内;Met为两个氢原子、一个二价金属原子、一个三价单取代金属原子、一个四价双取代金属原子或一个氧化金属原子;将此酞菁添加到记录层中形成的光学记录介质;以及包含该酞菁的近红外吸收剂。上述酞菁可用于提供具有反射率、灵敏度、记录性能、耐再生光稳定性、货架稳定性等优异特性的光学记录介质。