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LED PRODUCED UV RADIATION CURABLE SILICONE RELEASE COATINGS AND METHODS FOR CURING THE SAME USING LED LIGHT SOURCE

IP.com Disclosure Number: IPCOM000202125D
Publication Date: 2010-Dec-04
Document File: 7 page(s) / 19K

Publishing Venue

The IP.com Prior Art Database

Related People

Joseph Ostroff, Esq.: ATTORNEY

Abstract

This invention provides a new and more energy efficient method for creating silicone release coatings. Light Emitting Diodes (LED’s) have been used as the energy source for curing silicone solutions on substrates, thus creating, for example, a low energy, silicone release coating on a desired substrate.

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This is the abbreviated version, containing approximately 29% of the total text.

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MOMENTIVE PERFORMANCE MATERIALS INC.

LED PRODUCED UV RADIATION CURABLE SILICONE RELEASE COATINGS AND

METHODS FOR CURING THE SAME USING LED LIGHT SOURCE

ABSTRACT

    This invention provides a new and more energy efficient method for creating silicone release coatings. Light Emitting Diodes (LED's) have been used as the energy source for curing silicone solutions on substrates, thus creating, for example, a low energy, silicone release coating on a desired substrate.

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LED PRODUCED UV RADIATION CURABLE SILICONE RELEASE COATINGS AND

METHODS FOR CURING THE SAME USING LED LIGHT SOURCE

[0001] The present invention relates to Light Emitting Diodes (LEDs) produced UV radiation active silicone compounds and a method of curing such compositions using UV radiation produced from LEDs.

BACKGROUND OF THE INVENTION

[0002] Commercially viable radiation-curable silicones for different coating applications have been the goal of recent research investigations. In the course of such investigations, there have been taught epoxysilicon/onium catalyst systems, U.S. Pat. Nos. 4,279,717 and 4,421,904; various acrylated and methacrylated silicones, U.S. Pat. Nos. 4,348,454 and 4,558,082; perbenzoate photocatalyzed silicone terpolymers, U.S. Pat. No. 4,558,147; and mercaptan functional silicone polymers, U.S. Pat. No. 4,595,471 (each recited patent is herein incorporated by reference) herein is among others.
[0003] A radiation-curable silicone should be easy to produce, inexpensive to process, and "user friendly"; that is, present no special problems on application and cure if it is to be a commercially viable product. Seen in this light, UV produced from non-LED sources are higher in cost, produce excess heat that can reduce shelf stability of the product produced, and produce only a small wavelength of light that is actually used to cure the silicone. Accordingly, what is needed are LED cured silicon compositions and methods of curing such compositions using UV radiation produced from LEDs. LED cured silicon compositions and methods of curing using LEDs are less expensive and more effective than what is currently available on the market today. The present invention provides such compositions and methods that overcome the shortcomings of the prior art.

SUMMARY OF THE INVENTION

[0004] Currently, UV silicone release coatings are cured via a medium pressure mercury vapor arc or microwave fired mercury vapor lamps as a light source. This light

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source is inefficient in losing a significant amount of energy as heat, which does not further the cure of the release coatings and which can deform or otherwise degrade thermally sensitive or very thin film substrates. Further, they generate a wide spectrum of light where only a small range of light is compatible with the absorbing region of the active photo-catalyst present in the silicone coating formulation.
[0005] It is an object of the present invention to provide a LED produced radiation-c...