US4584259A — Coated media for optical recording with acrylic o…

Claim 1

Independent Claim 83 words

In a record unit comprising a relatively flat disk recording surface with at least one thermal recording area wherein information is to be thermally recorded with prescribed laser radiation, the combination therewith of: a hard protective outer-seal coating, so formulated and so applied to the outer surface of the recording area as to provide a mechanical/chemical barrier, while also being relatively transparent to said radiation, this coating being comprised of the self-leveling polymerization product of a formulation including at least one acrylate pre-polymer.

Claim 2

Dependent Claim 83 words

In a record unit comprising a relatively flat disk recording surface with at least one thermal recording area wherein information is to be thermally recorded with prescribed laser radiation, the combination therewith of: a hard protective outer-seal coating, so formulated and so applied to the outer surface of the recording area as to provide a mechanical/chemical barrier, while also being relatively transparent to said radiation, this coating being comprised of the self-leveling polymerization product of a formulation including at least one acrylate pre-polymer.

Claim 3

Dependent Claim 57 words

The combination as recited in claim 1 wherein the formulation includes one or more acrylate pre-polymer entities, and a compatible co-functional low molecular weight flexibilizing diluent, together with sufficient low viscosity cross-linker to give the desired coating toughness, plus sufficient compatible low molecular weight diluent to give the needed low viscosity for application to the disk surface.

Claim 4

Dependent Claim 38 words

The combination as recited in claim 2 wherein the pre-polymer entities include a clear, high molecular weight acrylate plus sufficient related low molecular weight compatible diluent to reduce viscosity to allow convenient application and spreading of the formulation.

Claim 5

Dependent Claim 22 words

The combination as recited in claim 3 wherein the cross-linker comprises a multi-functional acrylate like a triacrylate or trimethacrylate of tri-methyl-ol propane.

Claim 6

Dependent Claim 28 words

The combination as recited in claim 4 wherein the entities comprise a high molecular weight acrylated acrylate plus sufficient low molecular weight acrylated epoxide to so reduce viscosity.

Claim 7

Dependent Claim 26 words

The combination as recited in claim 5 wherein the formulation also includes sufficient of an organic flexibilizer-diluent to further lower viscosity enough for convenient application spreading.

Claim 8

Dependent Claim 23 words

The combination as recited in claim 6 wherein the formulation includes a hardness-moderating diluent acrylate like an acrylate of an ethyl hexyl group.

Claim 9

Dependent Claim 42 words

The combination as recited in claim 2 wherein the record unit is an optical mass memory disk for laser recording and wherein the coating is the order of several mils thick, being applied over a recording layer, or over a super-coat thereon.

Claim 10

Dependent Claim 13 words

The combination as recited in claim 4 wherein the pre-polymer groups are radiation-cured.

Claim 11

Dependent Claim 23 words

The combination as recited in claim 1 wherein a "soft pad" isolation layer is interposed between the recording area and said outer-seal coating.

Claim 12

Dependent Claim 14 words

The combination as recited in claim 10 wherein the isolation layer comprises a fluoropolymer.

Claim 13

Dependent Claim 18 words

The combination as recited in claim 11 wherein the fluoropolymer is the product of vacuum evaporation and condensation-repolymerization.

Claim 14

Dependent Claim 136 words

An optical disk record comprising a disk substrate including at least one recording area wherein information is to be recorded with prescribed laser radiation, and a relatively "hard" outer-seal coating applied over the disk substrate to a very high thickness uniformity, this coating being derived from the polymerization product of a formulation including at least one acrylate pre-polymer; and having been applied in a prescribed stream to the outer surface of the recording area, while rotating it at a prescribed rpm, so as to form one or several annular bead segments, extending circularly or spirally about the disk surface; the coating mixture having been so formulated and so applied as to be capable of leveling and so rendering the desired coating; this coating serving as a mechanical/chemical barrier, while also being relatively transparent to said radiation.

Claim 15

Dependent Claim 136 words

An optical disk record comprising a disk substrate including at least one recording area wherein information is to be recorded with prescribed laser radiation, and a relatively "hard" outer-seal coating applied over the disk substrate to a very high thickness uniformity, this coating being derived from the polymerization product of a formulation including at least one acrylate pre-polymer; and having been applied in a prescribed stream to the outer surface of the recording area, while rotating it at a prescribed rpm, so as to form one or several annular bead segments, extending circularly or spirally about the disk surface; the coating mixture having been so formulated and so applied as to be capable of leveling and so rendering the desired coating; this coating serving as a mechanical/chemical barrier, while also being relatively transparent to said radiation.

Claim 16

Dependent Claim 32 words

The disk record as recited in claim 13 wherein the mixture has been so formulated and the bead segments so distributed, in contiguity or near-contiguity to one another, as to be "self-leveling".

Claim 17

Dependent Claim 69 words

The record as recited in claim 14 wherein the formulation includes one or more acrylate pre-polymer entities, and a compatiable co-functional low molecular weight flexibilizing diluent, together with sufficient low viscosity cross-linker to give the desired coating toughness, plus sufficient compatible low molecular weight diluent to give the needed low viscosity for application to the disk surface; and also sufficient of a prescribed "setting-surfactant" to promote this bead "set-up".

Claim 18

Dependent Claim 36 words

The record as recited in claim 15 wherein the pre-polymer entities include a clear, high molecular weight acrylate plus sufficient related low molecular weight compatible diluent to reduce viscosity to allow convenient spreading of the formulation.

Claim 19

Dependent Claim 22 words

The record as recited in claim 16 wherein the cross-linker comprises a multi-functional acrylate like a triacrylate or trimethacrylate of tri-methyl-ol propane.

Claim 20

Dependent Claim 28 words

The record as recited in claim 17 wherein the entities comprise a high molecular weight acrylated acrylate plus sufficient low molecular weight acrylated epoxide to so reduce viscosity.

Claim 21

Dependent Claim 26 words

The combination as recited in claim 18 wherein the formulation also includes sufficient of an organic flexibilizer-diluent to further lower viscosity enough for convenient application spreading.

Claim 22

Dependent Claim 23 words

The record as recited in claim 19 wherein the formulation includes a hardness-moderating diluent acrylate like an acrylate of an ethyl hexyl group.

Claim 23

Dependent Claim 43 words

The record as recited in claim 15 wherein the record unit is an optical mass memory disk for laser recording and wherein the coating is the order of several mils thick, being applied over a recording layer, or over a thin super-coat thereon.

Claim 24

Dependent Claim 13 words

The record as recited in claim 17 wherein the pre-polymer entities are radiation-cured.

Claim 25

Dependent Claim 123 words

An optical disk record comprising a disk substrate having at least one recording area wherein information is to be recorded with prescribed radiation, plus a protective outer-seal coating of very high thickness-uniformity applied over the disk substrate, this coating comprising the product of a formulation including at least one acrylate pre-polymer applied on the recording area, while rotating it at a prescribed rpm, so as to form one or several annular bead segments, extending circularly or spirally about the disk surface; this formulation having been so formulated and so applied as to be capable of leveling and so rendering the desired coating; this coating serving as a mechanical/chemical barrier, while also being relatively transparent to said radiation; and having been cured in situ.

Claim 26

Dependent Claim 123 words

An optical disk record comprising a disk substrate having at least one recording area wherein information is to be recorded with prescribed radiation, plus a protective outer-seal coating of very high thickness-uniformity applied over the disk substrate, this coating comprising the product of a formulation including at least one acrylate pre-polymer applied on the recording area, while rotating it at a prescribed rpm, so as to form one or several annular bead segments, extending circularly or spirally about the disk surface; this formulation having been so formulated and so applied as to be capable of leveling and so rendering the desired coating; this coating serving as a mechanical/chemical barrier, while also being relatively transparent to said radiation; and having been cured in situ.

Claim 27

Dependent Claim 42 words

The record as recited in claim 23 wherein the coating is applied to a thickness of one or several mils, yet so as to maintain precise thickness-uniformity, on the order of a few um across a span of several inches or more.

Claim 28

Dependent Claim 90 words

The record as recited in claim 23 wherein the formulation includes one or more acrylate pre-polymer entities, and a compatible co-functional low molecular weight flexibilizing diluent, together with sufficient low viscosity cross-linker to give the desired coating necessary toughness and strength, plus sufficient compatible low molecular weight diluent to give the needed low viscosity for application to the disk surface; and wherein the pre-polymer entities include a clear, high molecular weight acrylate plus sufficient related low molecular weight compatible diluent to reduce viscosity to allow convenient spreading of the formulation.

Claim 29

Dependent Claim 46 words

The record as recited in claim 25 wherein the cross-linker comprises a multi-functional acrylate like triacrylate or trimethacrylate of tri-methyl-ol propane; and wherein the mixture is so formulated and the bead segments are so distributed, in contiguity or near-contiguity to one another, as to be "self-leveling".

Claim 30

Dependent Claim 32 words

The record as recited in claim 15 wherein the bead has been applied as one continuous spiral with successive adjacent segments kept spaced by a prescribed bead-spacing apt for such leveling action.

Claim 31

Dependent Claim 81 words

The record as recited in claim 17 wherein the mixture has been dispensed through a nozzle, being formulated to exhibit a prescribed viscosity apt for such dispensing, as well as to exhibit a prescribed thixotropy and wetting characteristic relative to said disk surface whereby the beads will "set-up" thereon for sufficient time to allow the leveling action; the mixture having been formulated to include said prescribed "setting-surfactant" specified for the indicated "wetting", while also imparting said "set-up" action of the beads.

Claim 32

Dependent Claim 86 words

The record as recited in claim 13 wherein the mixture includes at least one acrylate plus at least one associated viscosity-controlling diluent and a compatible cross-linking entity, along with one or more compatible surfactants adapted for promoting "wetting" of the beads to the disk surface and bead "set-up" thereon; and wherein the disk surface is comprised of a prescribed polymer and where a corresponding surfactant is included, tailored to impart said wetting of the beads and this polymer surface, as well as to "set-up" the beads.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1989-04-21	1989-10-21	1990-04-22	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1993-04-21	1993-10-21	1994-04-22	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1997-04-21	1997-10-21	1998-04-22	$7700.00	Window Closed / Lapsed

Coated media for optical recording with acrylic overcoat

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