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Method and composition for restoring damaged optical substrates utilizing high refractive index ultraviolet curable coating

A technology for curing coatings and compositions, applied in the field of repairing damaged optical substrates and compositions using high-refractive-index UV-curable coatings, can solve problems such as increasing processing costs, reducing commercial production, and long processing times

Inactive Publication Date: 2014-06-25
DIC IMAGING PROD USA LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Longer processing times reduce commercial throughput
Furthermore, running processing equipment for longer periods of time results in increased processing costs

Method used

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  • Method and composition for restoring damaged optical substrates utilizing high refractive index ultraviolet curable coating
  • Method and composition for restoring damaged optical substrates utilizing high refractive index ultraviolet curable coating
  • Method and composition for restoring damaged optical substrates utilizing high refractive index ultraviolet curable coating

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Embodiment Construction

[0020] Reference will now be made in detail to embodiments of the invention, examples of which are illustrated in the accompanying drawings.

[0021] The present application describes a method and composition for improving the readability of damaged optical substrates. The method comprises the steps of applying a composition according to the invention to the laser reading side of an optical substrate and then subjecting the applied coating to UV radiation. The goal is to closely match the refractive index level of the applied coating to that of the optical substrate. By doing so, the laser read face of the optical substrate is planarized, which results in a reduction and / or elimination of skips. Furthermore, the visual properties of the optical substrate showed significantly less scratches. When a disc becomes visually damaged it can lose resale value and give customers a perception of reduced quality even though it has an acceptable PI Sum8 Average (PI Sum8Average) and perf...

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Abstract

The present invention describes a method for repairing defects on a surface of an optical substrate. The method includes a step of providing a radiation curable coating and then applying the coating onto a surface of the optical substrate. The coating is then cured with a UV light source causing the refractive index of the coating to be less than +-10% of the refractive index of the substrate. The cured coating exhibits a viscosity less than about 315 CP at 25 DEG C. The present invention also describes a novel coating composition for repairing optical substrates.

Description

[0001] This application claims the benefit of US Provisional Patent Application No. 61 / 507,662, filed July 14, 2011, which is hereby incorporated by reference for all purposes as if fully set forth herein. [0002] Background of the invention technical field [0003] In general, the present invention relates to a method for repairing a damaged optical substrate and / or also for reducing or eliminating scratches therefrom. The present invention also relates to a coating composition for repairing damaged optical substrates and / or reducing or eliminating scratches therefrom. Background technique [0004] Optical substrates such as CDs and DVDs have become increasingly popular media for accessing media such as music, movies and video games. In fact, services such as Netflix and Blockbuster already rely on optical substrates to deliver media directly to their customers by mail. However, there are more than a few instances where customers may receive damaged and / or scratched opt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C73/02
CPCB29C2035/0827B29C73/02G02B1/105B05D3/067B05D5/005G02B1/14
Inventor 鲁塞尔·安德森
Owner DIC IMAGING PROD USA LLC