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Coating formulations for limited play data storage media

A formula and coating technology, which is applied in the field of storage media with limited playback, can solve the problems of losing intellectual property rights and so on

Inactive Publication Date: 2005-08-31
GENERAL ELECTRIC CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commercialization of a data storage medium with limited play risks the loss of intellectual property rights because it is vulnerable to destruction and becomes a data storage medium with unlimited play

Method used

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  • Coating formulations for limited play data storage media
  • Coating formulations for limited play data storage media
  • Coating formulations for limited play data storage media

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0039] The preparation of the data storage medium is first to make the base material in a common reaction equipment suitable for mixing various masterbatches, such as single or twin-screw extruders, kneaders, and blenders. The extruder should be kept at a temperature high enough to melt the base material masterbatch without causing it to decompose. For polycarbonate, for example, temperatures from about 220°C to about 360°C, preferably from about 260°C to about 320°C, may be employed. Likewise, residence time in the extruder should be controlled to minimize decomposition. Residence times of about 2 minutes or longer may be employed, preferably not longer than about 1.5 minutes, particularly preferably not longer than 1 minute. The mixture may optionally be filtered, such as through a sieve pack, to remove contaminants or decomposition products prior to extrusion (usually into pellets, sheets, webs, etc.).

[0040] After the plastic composition is formed, the substrate can be...

Embodiment 1

[0157] This example describes the preparation of a polymethyl toluacrylate / oxidized leuco methylene blue coating solution.

[0158] To 450 g / -methoxy-2-propanol in the bottle was added 111 g of Ineos Acrylics Elvaci in 2008 polymethyl methacrylate (inherent viscosity 0.183 cm 3 / g), and rolled on a roller machine to dissolve it. The solution was transferred to a flask, and an ammonia flow of about 100 ml / min was introduced to the surface of the solution, and heated to about 80°C. The deaerated solution was cannulated under nitrogen pressure into a degassed bottle closed with a rubber stopper.

[0159] To prepare a colorless methylene blue solution, 4.85 g of methylene blue trihydrate, 2.05 g of camphorsulfonic acid and 148.3 g of 1-methylamino-2-propanol were mixed together in a 250 ml flask with a rubber stopper. The stirred mixture was heated in a water bath at 90°C while a nitrogen stream was passed through the inlet and outlet at a rate of about 100 cc / min with a syringe...

Embodiment 2

[0162] This example illustrates an optical disc prepared by coating with poly(methyl methacrylate) / oxidized leuco methylene blue. About 3 mL of the polymethylmethacrylate / oxidized leuco methylene blue coating solution of Example 1 was applied to the DVD in a spin coater in a ring around its inner diameter. Spin coating at 600 rpm for 60 seconds, the coating was tack free and very blue.

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Abstract

A coating formulation is provided which comprises at least one polyhydroxy compound; at least one carrier; and at least one reactive material.

Description

[0001] This application claims priority to US Provisional Patent Application Serial No. 60 / 374,353, filed April 22, 2002, which is incorporated herein by reference. Background of the invention [0002] The present invention relates to storage media. More particularly, the present invention relates to limited play storage media. [0003] Optical, magnetic, and magneto-optical media are major sources of high-performance storage technologies that combine high storage capacity with reasonable price per megabyte of storage. Optical media has become popular for audio, video, and computer data applications in formats such as compact disc (CD), digital video disc (DVD) including multilayer structures such as DVD-5, DVD-9, and multilateral formats such as DVD -10, and DVD-18, magneto-optical disk (MO), and other write-once and rewritable formats such as CD-R, CD-RW, DVD-R, DVD-RW, DVD+RW, DVD- RAM, etc., hereinafter collectively referred to as "data storage medium". In these formats...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/12C09D133/00C09D201/00G11B7/243G11B7/244G11B7/245G11B7/246G11B7/26
CPCG11B7/246C09D201/00G11B7/2433G11B7/259G11B7/2534G11B7/256G11B7/245G11B7/2542G11B7/2472G11B7/248G11B7/26G11B2007/24304C09D5/00G11B7/254
Inventor 卡林·A·埃兹比安斯基丹尼尔·R·奥尔森马克·B·威斯纽德尔爱德华·P·林霍尔姆
Owner GENERAL ELECTRIC CO
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