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US4435476A
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Method of making an abrasion resistant coating on a solid substrate and articles produced thereby
Assignee: Foster Grant Co Inc
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Filing: 1982-08-18
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Granted: 1984-03-06
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Expires: 2002-08-18
Abstract
Abstract There is disclosed a method for providing an improved abrasion resistant coating on solid substrates such as plastic articles and solid articles prepared thereby having on the surface such abrasion resistant coating. A solid substrate is coated with an organosiloxane coating liquid, the coating is cured, and subsequently post-treated by a glow discharge to afford an abrasion resistance far superior to that obtained from organosiloxane coating liquids without glow discharge post-treatment. The organosiloxane coating liquid comprises and organosilonal and/or a partial condensation product thereof. There is also disclosed a mirrored solid substrate such as a plastic having an improved abrasion resistance which has a glow discharge treated organosiloxane coating layer and a mirror layer deposited thereon by a vapor deposition method.
Inventors
- 👤 Richard A. Phillips
- 👤 Theodore A. Haddad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:59
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/123; B; B05; B05D; B05D3/00; B05D3/14; B05D3/141; B05D3/145; B05D3/148; C09; C09D; C09D183/00; C09D183/04; C08J2383/00; C08J2383/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31652; Y10T428/31663; Y10T428/31725; Y10T428/31786; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
100 words
A method of improving the abrasion resistance of cross-linked organosiloxane coating, said coating having been prepared by applying to a solid substrate an organosiloxane coating liquid comprising organosilanol molecules of the formula R' m Si(OH) 4-m or a precursor of said organosilanol or a partial hydrolysis product thereof, where m is 1 or 2 and R' is each independently a hydrocarbon radical and by curing the resultant coating to obtain an abrasion resistant, cross-linked organosiloxane coating, which method comprises a glow discharge treatment of said cross-linked organosiloxane coating under a pressure range of from about 5 to about 150 microns.
Claim 2
Independent Claim
100 words
A method of improving the abrasion resistance of cross-linked organosiloxane coating, said coating having been prepared by applying to a solid substrate an organosiloxane coating liquid comprising organosilanol molecules of the formula R' m Si(OH) 4-m or a precursor of said organosilanol or a partial hydrolysis product thereof, where m is 1 or 2 and R' is each independently a hydrocarbon radical and by curing the resultant coating to obtain an abrasion resistant, cross-linked organosiloxane coating, which method comprises a glow discharge treatment of said cross-linked organosiloxane coating under a pressure range of from about 5 to about 150 microns.
Claim 3
Dependent Claim
23 words
The method as defined in claim 1 wherein the glow discharge treatment is conducted under a pressure within the range of 5-50 microns.
Claim 4
Dependent Claim
11 words
The method as defined in claim 1 wherein m is 1.
Claim 5
Dependent Claim
11 words
The method as defined in claim 3 wherein R' is methyl.
Claim 6
Dependent Claim
52 words
The method as defined in claim 1 wherein R' is selected from the group consisting of alkyl radicals of 1 to 3 inclusive carbon atoms, the vinyl radical, the 3,3,3-trifluoropropyl radical, the gamma-glycidoxypropyl radical and the gamma-methacryloxypropyl radical, at least 70 weight percent of the silanol being CH 3 Si(OH) 3 .
Claim 7
Dependent Claim
15 words
The method as defined in claim 1, wherein the solid substrate is a plastic material.
Claim 8
Dependent Claim
36 words
The method as defined in claim 6 wherein the plastic material is selected from the group consisting of acrylic resin, polycarbonate resin, allyl diglycol carbonate resin, polyester resin, polyamide resin, polystyrene resin and cellulose ester resin.
Claim 9
Dependent Claim
21 words
The method as defined in claim 7 wherein a mirror layer is deposited on said glow discharge treated, crosslinked, organosiloxane coating.
Claim 10
Dependent Claim
71 words
A solid substrate coated with an abrasion-resistant cross-linked organosiloxane coating comprising the cross-linked condensation product of organosilanol molecules of the formula R' m Si(OH) 4-m or a precursor of said organosilanol or a partial hydrolysis product thereof, where m is 1 or 2 and R' is each independently a hydrocarbon radical, wherein said organosiloxane coating has been glow discharge treated at a pressure of 5-150 microns subsequent to condensation and cross-linking.
Claim 11
Dependent Claim
71 words
A solid substrate coated with an abrasion-resistant cross-linked organosiloxane coating comprising the cross-linked condensation product of organosilanol molecules of the formula R' m Si(OH) 4-m or a precursor of said organosilanol or a partial hydrolysis product thereof, where m is 1 or 2 and R' is each independently a hydrocarbon radical, wherein said organosiloxane coating has been glow discharge treated at a pressure of 5-150 microns subsequent to condensation and cross-linking.
Claim 12
Dependent Claim
24 words
The solid substrate as defined in claim 9 wherein the glow discharge treatment is conducted under a pressure within the range of 5.50 microns.
Claim 13
Dependent Claim
12 words
The solid substrate as defined in claim 9 wherein m is 1.
Claim 14
Dependent Claim
12 words
The solid substrate as defined in claim 11 wherein R' is methyl.
Claim 15
Dependent Claim
53 words
The solid substrate as defined in claim 9 wherein R' is selected from the group consisting of alkyl radicals of 1 to 3 inclusive carbon atoms, the vinyl radical, the 3,3,3-trifluoropropyl radical, the gamma-glycidoxypropyl radical and the gamma-methacryloxypropyl radical, at least 70 weight percent of the silanol being CH 3 Si(OH) 3 .
Claim 16
Dependent Claim
16 words
The solid substrate as defined in claim 9 wherein the solid substrate is a plastic material.
Claim 17
Dependent Claim
37 words
The solid substrate as defined in claim 14 wherein the plastic material is selected from the group consisting of acrylic resin, polycarbonate resin, allyl diglycol carbonate resin, polyester resin, polyamide resin, polystyrene resin and cellulose ester resin.
Claim 18
Dependent Claim
84 words
A solid substrate having a glow-discharge-treated, abrasion-resistant cross-linked organosiloxane coating thereon, said abrasion resistant coating comprising the cross-linked condensation product of organosilanol molecules of the formula R' m Si(OH) 4-m or a precursor of said organosilanol or a partial hydrolysis product thereof, where m is 1 or 2 and R' is each independently a hydrocarbon radical, wherein said organosiloxane coating has been glow discharge treated at a pressure of 5-150 microns subsequent to condensation and crosslinking and a mirror layer on said organosiloxane coating.
Claim 19
Dependent Claim
84 words
A solid substrate having a glow-discharge-treated, abrasion-resistant cross-linked organosiloxane coating thereon, said abrasion resistant coating comprising the cross-linked condensation product of organosilanol molecules of the formula R' m Si(OH) 4-m or a precursor of said organosilanol or a partial hydrolysis product thereof, where m is 1 or 2 and R' is each independently a hydrocarbon radical, wherein said organosiloxane coating has been glow discharge treated at a pressure of 5-150 microns subsequent to condensation and crosslinking and a mirror layer on said organosiloxane coating.
Claim 20
Dependent Claim
16 words
The solid substrate as defined in claim 16, wherein the solid substrate is a plastic material.
Claim 21
Dependent Claim
37 words
The solid substrate as defined in claim 17, wherein the plastic material is selected from the group consisting of acrylic resin, polycarbonate resin, allyl diglycol carbonate resin, polyester resin, polyamide resin, polystyrene resin and cellulose ester resin.
Claim 22
Dependent Claim
28 words
The solid substrate as defined in claim 16, wherein the plastic material is selected from the group consisting of arylic, polycarbonate, allyl diglycol carbonate and cellulose ester resins.
Claim 23
Dependent Claim
58 words
A solid substrate coated with a glow-discharge-treated, abrasion-resistant organosiloxane coating having siloxane cross-linkages, said coated substrate having an abrasion resistance such that the number of cycles of abrasive motion required to increase the haze value of the solid substrate by 3% is at least 500 as determined by the rubbing pad abrader test method under 100 gram load.
Claim 24
Dependent Claim
58 words
A solid substrate coated with a glow-discharge-treated, abrasion-resistant organosiloxane coating having siloxane cross-linkages, said coated substrate having an abrasion resistance such that the number of cycles of abrasive motion required to increase the haze value of the solid substrate by 3% is at least 500 as determined by the rubbing pad abrader test method under 100 gram load.
Claim 25
Dependent Claim
16 words
The solid substrate as defined in claim 20, wherein the solid substrate is a plastic material.
Claim 26
Dependent Claim
37 words
The solid substrate as defined in claim 21, wherein the plastic material is selected from the group consisting of acrylic resin, polycarbonate resin, allyl diglycol carbonate resin, polyester resin, polyamide resin, polystyrene resin and cellulose ester resin.
Claim 27
Dependent Claim
28 words
The solid substrate as defined in claim 1, wherein the plastic material is selected from the group consisting of acrylic, polycarbonate, allyl diglycol carbonate and cellulose ester resins.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |