Methods for producing optical recording medium and optical...

Details Methods for producing optical recording medium and optical... Methods for producing optical recording medium and optical...

2011-01-18

2011-01-18

Mulvaney, Elizabeth (Department: 1785)

Stock material or miscellaneous articles

Circular sheet or circular blank

C428S064400, C430S270110

Reexamination Certificate

active

07871685

ABSTRACT:
The present invention provides a method for producing an optical recording medium having: a supporting substrate; a light transmission layer, which transmits a laser beam; and an information layer formed between the supporting substrate and the light transmission layer, which includes: applying a resin composition on the information layer by a spin coating method to form a coating film, wherein the resin composition contains, as main components: (A) a radical-curing urethane(meth)acrylate, which is obtained by reacting (a-1) a compound having three or more isocyanate groups binding to an aliphatic carbon atom per one molecule thereof and (a-2) a polycaprolacton-modified hydroxyethyl(meth)acrylate; and (B) a radical-curing monomer having a viscosity of 400 mPa.s or less at 25° C., curing the coating film by irradiating the coating film with an ultraviolet light or an electron beam to form the light transmission layer.

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