EP0499492A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Plastic optical articles
Assignee: Toray Industries Inc
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Filing: 1992-02-17
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Granted: —
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Expires: 2012-02-17
Abstract
Abstract [OBJECT] A plastic optical article having excellent heat resistance, abrasion resistance, transparency and solvent resistance is to be provided. [CONSTRUCTION] A plastic optical article wherein a transparent coating film comprises mainly of a cross-linked organopolysiloxane is applied on a transparent three-dimensional cross-linked resin having a glass transition temperature of at least 130°C. [EFFECT] The article has excellent heat resistance, solvent resistance, chemical resistance, abrasion resistance and transparency, and is used as optical materials for optical lenses and substrate materials for various display devices. Also when an inorganic thin film is deposited on a surface such as a transparent electro-conductive film, a thin film having a high heat resistance can be obtained.
Inventors
- 👤 Shinichi Yamada
- 👤 Naoki Shimoyama
- 👤 Takashi Taniguchi
- 👤 Syunzi Kono
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 12:44
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08L; C08L79/00; C08L79/04; C08L79/08; C08L79/085; C08J7/0427; C08J7/043; C08J7/044; C08J7/046; C09; C09D; C09D179/00; C09D179/04; C09D179/08; C09D179/085; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133305; G02F1/133345; C08J2335/00; C08J2335/06; C08J2483/00; C09K; C09K2323/00; C09K2323/05; C09K2323/051; C09K2323/053; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/257; Y10T428/26; Y10T428/266; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31667; Y10T428/31721
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
26 words
A plastic optical article having a transparent coating applied to a surface of a transparent crosslinked resin having a glass transition temperature of at least 130°C.
Claim 2
Dependent Claim
125 words
A plastic optical article according to claim 1, wherein said transparent cross-linked resin is a copolymer obtained by polymerizing a composition which contains 20 to 98 wt% of a monomer represented by the general formula (A) and 2 to 80 wt% of a polyfunctional monomer having at least two unsaturated groups, and in which the total weight of said monomer represented by the general formula (A) and said polyfunctional monomer having at least two unsaturated groups is at least 30 wt % by weight of the total composition. wherein R³ represents a substituent selected from the group consisting of hydrogen and C₁ to C₂₀ hydrocarbon groups, and R¹ and R² each independently represents a substituent selected from hydrogen, a methyl group and an ethyl group.
Claim 3
Dependent Claim
28 words
A plastic optical article according to claim 1 or 2, wherein said transparent coating is a transparent coating comprising an organic polymer and fine particles of metal oxide.
Claim 4
Dependent Claim
75 words
A plastic optical article according to claim 3, wherein said organic polymer is a polymer obtained from a compound selected from an organosilicon compound represented by the following general formula (B) and its hydrolyzate: R⁴ a R⁵ b SiX 4-a-b (B) wherein R⁴ is a C₁ to C₁₀ organic group, R⁵ is a C₁ to C₆ hydrocarbon group or halogenated hydrocarbon group, X is a hydrolyzing group, and a and b are 0 or 1.
Claim 5
Dependent Claim
30 words
A plastic optical article according to claim 3 or 4, wherein the transparent coating contains 1 to 80wt%, by weight of the coating, of said fine particles of metal oxide.
Claim 6
Dependent Claim
24 words
A plastic optical article according to claim 1, 2 or 3, wherein said transparent coating comprises a silicone type resin as the principal component.
Claim 7
Dependent Claim
36 words
A plastic optical article according to claim 6, wherein said silicone type resin is a polymer obtained from an organosilicon compound represented by the general formula (B) as defined in claim 4, or a hydrolyzate thereof.
Claim 8
Dependent Claim
21 words
A plastic optical article according to any preceding claim, having a bending modulus at 170°C of from 20 to 300 kg/mm².
Claim 9
Dependent Claim
23 words
A plastic optical article according to any preceding claim, wherein said transparent cross-linked resin has a glass transition temperature of at least 160°C.
Claim 10
Dependent Claim
17 words
A plastic optical article according to any preceding claim, which includes at least one transparent electro-conductive layer.
Claim 11
Dependent Claim
26 words
A plastic optical article according to claim 10, wherein the thickness of said transparent cross-linked resin is within the range of 0. 3 to 1.0 mm.
Claim 12
Dependent Claim
19 words
A plastic optical article according to claim 10 or 11, wherein said transparent electro-conductive layer comprises indium tin oxide.
References Cited (Backward Citations)
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