EP0193269A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Silica coating
Assignee: 3M Co
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Filing: 1986-01-22
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Granted: —
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Expires: 2006-01-22
Abstract
Abstract coated article having a substrate coated with a layer of silica particles is provided. The coating is substantially uniform in thickness, adheres aggressively to the substrate, and provides excellent antireflection properties to the substrate.
Inventors
- 👤 Roger W. C/O Minnesota Mining And Lange
- 👤 Harold G. C/O Minnesota Mining And Sowman
- 👤 Soon Kun C/O Minnesota Mining And Kang
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 19:57
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/10; G02B1/11; G02B1/113; C; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/213; C03C2218/00; C03C2218/10; C03C2218/11; C03C2218/113; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/257; Y10T428/259; Y10T428/26; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31667; Y10T428/31786
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
32 words
A coated article comprising a substrate having a coating of a continuous, gelled network of silica particles which coating is substantially uniform in thickness and is substantially permanently adhered to said substrate.
Claim 2
Dependent Claim
32 words
A coated article comprising a substrate having a coating of a continuous, gelled network of silica particles which coating is substantially uniform in thickness and is substantially permanently adhered to said substrate.
Claim 3
Dependent Claim
21 words
The coated article of claim 1 wherein said silica particles have a primary particle size of less than about 200 A.
Claim 4
Dependent Claim
21 words
The coated article of claim 1 wherein said coating provides a 180 0 peelback value of at least about 150 g/cm.
Claim 5
Dependent Claim
16 words
The coated article of claim 1 wherein said coating is about 20 to 500 nm thick.
Claim 6
Dependent Claim
32 words
The coated article of claim 1 wherein said coating is prepared from a colloidal solution capable of providing a dried product having an open porosity of between about 25 and 70 percent.
Claim 7
Dependent Claim
17 words
The coated article of claim 1 wherein said coating contains up to about 20 weight percent water.
Claim 8
Dependent Claim
11 words
The coated article of claim 1 wherein said substrate is transparent.
Claim 9
Dependent Claim
36 words
The coated article of claim 7 wherein the transmission therethrough of normal incident light in the wavelength range of 400 to 800 nm is increased over the transmission through an uncoated substrate of the same composition.
Claim 10
Dependent Claim
16 words
The coated article of claim 8 wherein said average transmission is increased at least 2 percent.
Claim 11
Dependent Claim
17 words
The coated article of claim 8 wherein said coating is from about 70 to 250 nm thick.
Claim 12
Dependent Claim
20 words
The coated article of claim 8 wherein said coating has an index of refraction of between about 1.15 and 1.40.
Claim 13
Dependent Claim
13 words
The coated article of claim 1 or 7 wherein said substrate is polymeric.
Claim 14
Dependent Claim
58 words
The process for forming coated article of claim 1 comprising coating said substrate with a solution containing colloidal silica particles, and drying said coating at a temperature less than that which degrades said substrate to form a substantially continuous, gelled network of silica particles which is substantially uniform in thickness and is substantially permanently adhered to said substrate.
Claim 15
Dependent Claim
20 words
The process of claim 13 wherein said particles have an average primary particle size of less than about 200 A.
Claim 16
Dependent Claim
17 words
The process of claim 13 wherein the coating is dried at a temperature of less than 200°C.
Claim 17
Dependent Claim
22 words
The process of claim 13 wherein the coating is dried at a temperature in the range of 80 0 C to 120°C.
References Cited (Backward Citations)
No citation records indexed.
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