摘要:
The invention discloses a CD-WO type optical recording medium which has a constitution obtained by successively laminating a recording layer, a metal reflection layer and a protective layer; is prepared by using in the recording layer a colorant having a melting point of 150 to 300°C, decomposition initiating temperature of 200 to 350°C, and λ max of 720 nm; and has high sensitivity, low recording distortion and high durability. The colorant can be enhanced its effect by introducing halogen atoms.
摘要:
A phthalocyanine represented by the formula (1)
wherein each of R¹, R², R³ and R⁴ 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 R¹, R², R³ and R⁴ 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.
摘要:
The present invention provides a light-absorbing compound represented by the formula (I):
Dye-(OR¹)(OR²)(OR³) ··· (OR n ) (I)
wherein Dye is a light-absorbing compound residue having at least one aromatic ring; OR¹ to OR n are substituents on the aromatic ring, and are independently (a) substituted or unsubstituted saturated hydrocarbonoxy groups having 1 to 20 carbon atoms, or (b) substituted or unsubstituted unsaturated hydrocarbonoxy groups having 2 to 20 carbon atoms, and at least one of OR¹ to OR n is an unsaturated hydrocarbonoxy group; and n is a value of from 1 to 10. The present invention also provides an optical recording medium containing the above-mentioned light-absorbing compound in a recording layer.
摘要:
Phthalocyanine compounds represented by the below-described formula are suitable for use in the fabrication of color filters.
wherein R 1 , R 4 , R 5 , R 8 , R 9 , R 12 , R 13 and R 16 represent a group represented by the below-described formula, H or a halogen atom, R 2 , R 3 , R 6 , R 7 , R 10 , R 11 , R 14 and R 15 represent an alkyl, alkoxyl, alkylthio, alkylamino, dialkylamino or aryloxyl, arylthio group or -COOR 17 , R 17 being a particular monovalent group, H or a halogen atom; and Met represents a metal atom.
wherein X and Z represent O or S, R 18 , R 19 and R 20 represent H or an alkyl group, A, B and D represent a connecting group, n and ℓ is an integer of 0-10, m, q, t, u, r and w are an integer of 0-2, and p is 0 or 1.