Monosubstituted and disubstituted phthalocyanines
AssigneeBASF SE
InventorsBernhard Albert, Harald Kuppelmaier, Gerhard Wagenblast
Life of this patent
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Abstract
Metal-containing or metalfree, monosubstituted or disubstituted phthalocyanines I which have one or two of the following radicals R as substituents on their benzene rings: R=bromine, cyano, C.sub.1 -C.sub.3 -alkyl, n-butyl, i-butyl, C.sub.5 -C.sub.20 -alkyl, C.sub.5 -C.sub.10 -cycloalkyl, fluorinated C.sub.1 -C.sub.6 -alkyl, C.sub.6 -C.sub.20 -aryl, XR.sup.1, where X is oxygen, sulfur, selenium, tellurium or imino (NH) and R.sup.1 is C.sub.1 -C.sub.6 -alkyl, fluorinated C.sub.1 -C.sub.6 -alkyl or C.sub.6 -C.sub.20 -aryl, or Si(R.sup.2).sub.3, where R.sup.2 is C.sub.1 -C.sub.6 -alkyl, each and every substituted benzene ring being substituted by only one R radical, are useful in Laser-optical recording materials.
Claims28
A laser-optical recording element useful for the laser-optical recording of analog or digital data and which is capable of recording analog or digital data in the form of written areas or spots on a recording layer, said written areas or spots being formed by thermally altering areas or spots of the recording layer by phase transformation such that the written, thermally altered areas or spots show an increase in reflectivity compared to unwritten, unaltered areas and whereby no ablation or deformation leading to hole or pit formation takes place, said recording element consisting of
- (A) a dimensionally stable support layer and
- (B) a thermally alterable amorphous laser-optical recording layer of a thickness from about 50 to about 160 nm consisting of one or more monosubstituted or disubstituted phthalocyanines I wherein the monosubstituted phthalocyanine has one radical as a substituent on one of its four benzene rings and wherein the disubstituted phthalocyanine I has one radical as a substituent on each of two of its four benzene rings, said radical being XR.sup.1, where X is oxygen, sulfur, or imino and R.sup.1 is C.sub.1 -C.sub.6 -alkyl, fluorinated C.sub.1 -C.sub.6 -alkyl or C.sub.6 -C.sub.20 -aryl;
- or Se(R.sup.2).sub.3, where R.sup.2 is C.sub.1 -C.sub.6 -alkyl.
A method of recording analog or digital data by means of laser beams comprising:
- (1) irradiating a thermally alterable laser-optical recording element consisting of
- (A) a dimensionally stable support layer and
- (B) an amorphous recording layer of a thickness from about 50 to about 160 nm consisting of one or more monosubstituted or disubstituted phthalocyanines I, wherein the monosubstituted phthalocyanine I has one radical as a substituent on one of its four benzene rings and wherein the disubstituted phthalocyanine I has one radical as a substituent on each of two of its four benzene rings, said radical being XR.sup.1, where X is oxygen, sulfur or imino and R.sup.1 is C.sub.1 -C.sub.6 -alkyl, fluorinated C.sub.1 -C.sub.6 -alkyl or C.sub.6 -C.sub.20 -aryl;
- or Se(R.sup.2).sub.3, where R.sup.2 is C.sub.1 -C.sub.6 -alkyl;
- with a focussed analog-modified continuous wave laser beam or a pulse-coded laser beam guided over the laser-optical recording element in relative motion, said laser beam having a beam power high enough to cause a phase transformation in the irradiated areas of the laser-optical recording layer (B) and thereby produce thermally altered, written areas or spots which show an increase in reflectivity compared to unwritten, unaltered areas and by which no ablation or deformation leading to hole or pit formation takes place, to obtain a written laser-optical recording layer, and
- (2) detecting the areas of increased reflectivity in the written laser-optical recording layer by means of a laser beam guided in relative motion over said written laser-optical recording element, said laser beam having a beam power below the threshold power at which phase transformation becomes possible.
A written laser-optical recording element containing analog or digital data and consisting of
- (A) a dimensionally stable support layer and
- (B) a written recording layer thermally altered by means of write laser beam, the recording layer having a thickness of from about 50 to about 160 nm and consisting of one or more monosubstituted or disubstituted phahalocyanines I wherein the monosubsitituted phthalocyanine I has one radical as a substituent on one of its four benzene rings and wherein the disubstituted phthalocyanine I has one radical as a substituent on each of two of its four benzene rings, said radical being XR.sup.1 where X is oxygen, sulfur or imino and R.sup.1 is C.sub.1 -C.sub.6 -alkyl, fluorinated C.sub.1 -C.sub.6 -alkyl or C.sub.6 -C.sub.20 -aryl;
- or Si(R.sup.2).sub.3, where R.sup.2 is C.sub.1 -C.sub.6 -alkyl;
- the written recording layer containing analog or digital data in the form of written, thermally altered areas or spots which show an increase in reflectivity as compared with the unwritten areas and which contains no holes or pits resulting from ablation or deformation.
Dependencies are inferred from the claim text.