US4456659A — Substrate for optical disc recording media

Claim 1

Independent Claim 273 words

A substrate for optical disc recording media which comprises a transparent substrate and a sublayer formed thereon, which sublayer comprises a UV-curable resin film and a thermally decomposing high molecular weight film, characterized in that said UV-curable resin film existing between the transparent substrate and the thermally decomposing high molecular weight film of the sublayer is composed of a UV-curable composition comprising: (a) a high molecular weight substance of 500 to 10,000 M.W. having acrylic or methacrylic group at one or both ends of the molecule and also a polybutadiene skeleton within the molecule, (b) at least one compound selected from the compounds represented by the general formulas (1) and (2): ##STR10## wherein R is H or CH 3 and n is an integer of from 2 to 16, (c) a reactive diluent containing at least one acrylic or methacrylic group within the molecule and having a viscosity of 100 mPa.s or lower at 25° C., (a), (b) and (c) being mixed so as to fall within an area formed by connecting the following three points A, B and C in a triangle, ______________________________________ At least one com- pound selected The high molecular from the compounds substance of 500 represented by the The diluent to 10,000 M.W. above general mentioned in mentioned in (a) formulas (1) and (c) above, % above, % by weight (2), % by weight by weight ______________________________________ A 70 30 0 B 20 80 0 C 20 30 50 ______________________________________ and, (d) 0.5 to 5 parts by weight of a photo-polymerization initiator based on 100 parts by weight of a mixture of the above components (a), (b) and (c).

Claim 2

Dependent Claim 273 words

A substrate for optical disc recording media which comprises a transparent substrate and a sublayer formed thereon, which sublayer comprises a UV-curable resin film and a thermally decomposing high molecular weight film, characterized in that said UV-curable resin film existing between the transparent substrate and the thermally decomposing high molecular weight film of the sublayer is composed of a UV-curable composition comprising: (a) a high molecular weight substance of 500 to 10,000 M.W. having acrylic or methacrylic group at one or both ends of the molecule and also a polybutadiene skeleton within the molecule, (b) at least one compound selected from the compounds represented by the general formulas (1) and (2): ##STR10## wherein R is H or CH 3 and n is an integer of from 2 to 16, (c) a reactive diluent containing at least one acrylic or methacrylic group within the molecule and having a viscosity of 100 mPa.s or lower at 25° C., (a), (b) and (c) being mixed so as to fall within an area formed by connecting the following three points A, B and C in a triangle, ______________________________________ At least one com- pound selected The high molecular from the compounds substance of 500 represented by the The diluent to 10,000 M.W. above general mentioned in mentioned in (a) formulas (1) and (c) above, % above, % by weight (2), % by weight by weight ______________________________________ A 70 30 0 B 20 80 0 C 20 30 50 ______________________________________ and, (d) 0.5 to 5 parts by weight of a photo-polymerization initiator based on 100 parts by weight of a mixture of the above components (a), (b) and (c).

Claim 3

Dependent Claim 154 words

A substrate for optical disc recording media according to claim 1, wherein the high molecular weight substance (a) of 500 to 10,000 M.W. having acrylic or methacrylic group at one or both ends of the molecule and also a polybutadiene skeleton within the molecule is at least one compound selected from the group consisting of a compound produced by reacting 1 mole of a poly-1,2-butadiene having hydroxyl group at both ends with 2 moles of tolylenediisocyanate and thereafter reacting an excess of isocyanate group with 2 moles of acrylic acid; a compound produced by reacting 1 mole of a poly-1,2-butadiene having hydroxyl group at both ends with 2 moles of tolylenediisocyanate and thereafter reacting an excess of isocyanate group with 2 moles of methacrylic acid; and a compound produced by reacting 1 mole of a butadiene-acrylonitrile copolymer having carboxyl group at both ends (acrylonitrile content: 18% by weight) with 2 moles of glycidyl methacrylate.

Claim 4

Dependent Claim 205 words

A substrate for optical disc recording media according to claim 1, wherein the compounds represented by the general formula (1) is at least one compound selected from the group consisting of 2-ethyl-2-hydroxyethyl acrylate, 2-ethyl-2-hydroxyethyl methacrylate, 2-n-propyl-2-hydroxyethyl acrylate, 2-n-propyl-2-hydroxyethyl methacrylate, 2-n-butyl-2-hydroxyethyl acrylate, 2-n-butyl-2-hydroxyethyl methacrylate, 2-n-pentyl-2-hydroxyethyl acrylate, 2-n-pentyl-2-hydroxyethyl methacrylate, 2-n-hexyl-2-hydroxyethyl acrylate, 2-n-hexyl-2-hydroxyethyl methacrylate, 2-n-decyl-2-hydroxyethyl acrylate, 2-n-decyl-2-hydroxyethyl methacrylate, 2-n-tetradecyl-2-hydroxyethyl acrylate, 2-n-tetradecyl-2-hydroxyethyl methacrylate, 2-n-hexadecyl-2-hydroxyethyl acrylate and 2-n-hexadecyl-2-hydroxyethyl methacrylate; the compounds represented by the general formula (2) is at least one compound selected from the group consisting of 1-ethyl-2-hydroxyethyl acrylate, 1-ethyl-2-hydroxyethyl methacrylate, 1-n-propyl-2-hydroxyethyl acrylate, 1-n-propyl-2-hydroxyethyl methacrylate, 1-n-butyl-2-hydroxyethyl acrylate, 1-n-butyl-2-hydroxyethyl methacrylate, 1-n-pentyl-2-hydroxyethyl acrylate, 1-n-pentyl-2-hydroxyethyl methacrylate, 1-n-hexyl-2-hydroxyethyl acrylate, 1-n-hexyl-2-hydroxyethyl methacrylate, 1-n-decyl-2-hydroxyethyl acrylate, 1-n-decyl-2-hydroxyethyl methacrylate, 1-n-tetradecyl-2-hydroxyethyl acrylate, 1-n-tetradecyl-2-hydroxyethyl methacrylate, 1-n-hexadecyl-2-hydroxyethyl acrylate and 1-n-hexadecyl-2-hydroxyethyl methacrylate; the reactive diluent containing at least one acrylic or methacrylic group within the molecule and having a viscosity of 100 mPa.s or lower at 25° C. is at least one compound selected from the group consisting of lauryl acrylate, lauryl methacrylate, tridecyl methacrylate, isobornyl acrylate, isobornyl methacrylate, neopentyl glycol diacrylate, neopentyl glycol dimethacrylate, trimethylolethane triacrylate, trimethylolethane trimethacrylate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, 1,6-hexanediol diacrylate and 1,6-hexanediol dimethacrylate; and the photo-polymerization initiator is at least one compound selected from the group consisting of benzils, benzoins, benzophenones, acetophenones, thioxanethones, anthraquionones and phenylketones.

Claim 5

Dependent Claim 23 words

A substrate for optical disc recording media according to claim 1, wherein said thermally decomposing high molecular weight film is made of nitrocellulose.

Claim 6

Dependent Claim 21 words

A substrate for optical disc recording media according to claim 1, wherein said UV-curable composition further comprises a silane coupling agent.

Claim 7

Dependent Claim 39 words

A substrate for optical disc recording media according to claim 5, wherein said silane coupling agent is at least one compound selected from the group consisting of α-acryloxypropyl trimethoxy silane, α-methacryloxypropyl trimethoxy silane, vinyl trimethoxysilane, and vinyl triethoxy silane.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1987-06-26	1987-12-26	1988-06-26	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1991-06-26	1991-12-26	1992-06-26	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1995-06-26	1995-12-26	1996-06-26	$7700.00	Window Closed / Lapsed

Substrate for optical disc recording media

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag