Optical information recording medium
First Claim
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1. In an optical information recording medium comprising a substrate, a light-reflective recording layer comprising a cyanine organic coloring matter and a protective layer, the improvement which comprises:
- said protective layer comprises, as the main components, a high molecular weight binder and a plasticizer, said plasticizer being used in an amount of 20-60% by weight, based on the total weight of the protective layer, and said plasticizer being selected from the group consisting of phosphoric acid ester plasticizers, phthalic acid ester plasticizers, aliphatic acid ester plasticizers, dihydric alcohol ester plasticizers, oxyacid ester plasticizers, chlorinated paraffin, chlorinated biphenyl and 2-nitrobiphenyl.
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Abstract
The present invention relates to an optical information recording medium comprising a substrate, recording layer and protective layer, characterized in that said protective layer comprises, as the main components, a high molecular compound and at least one of record-promoting agents selected from the group of (a) explosive material, (b) plasticizer, (c) organic low molecular compound having a melting point not higher than 140° C., and (d) light-absorbing material.
34 Citations
19 Claims
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1. In an optical information recording medium comprising a substrate, a light-reflective recording layer comprising a cyanine organic coloring matter and a protective layer, the improvement which comprises:
- said protective layer comprises, as the main components, a high molecular weight binder and a plasticizer, said plasticizer being used in an amount of 20-60% by weight, based on the total weight of the protective layer, and said plasticizer being selected from the group consisting of phosphoric acid ester plasticizers, phthalic acid ester plasticizers, aliphatic acid ester plasticizers, dihydric alcohol ester plasticizers, oxyacid ester plasticizers, chlorinated paraffin, chlorinated biphenyl and 2-nitrobiphenyl.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An optical information recording medium comprising:
- a support;
a light-sensitive recording layer on said support, said recording layer consisting essentially of indolenine cyanine colorant, said recording layer having a thickness of from 200 to 600 Angstrom units; and
a protective layer covering said recording layer, said protective layer having a thickness of from 10 to 200 micrometers and consisting essentially of a blend of a binder resin and a plasticizer for said binder resin, said plasticizer comprising from 20 to 60% by weight of the total weight of said protective layer and being selected from the group consisting of phosphoric acid ester plasticizers, phthalic acid ester plasticizers, aliphatic acid ester plasticizers, dihydric alcohol ester plasticizers, oxyacid ester plasticizers, chlorinated paraffin, chlorinated biphenyl and 2-nitrobiphenyl. - View Dependent Claims (17, 18, 19)
- a support;
Specification