US4267000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for masking glass, glass-ceramic and ceramic surfaces
Assignee: Corning Glass Works
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Filing: 1979-09-13
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Granted: 1981-05-12
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Expires: 1999-09-13
Abstract
Abstract A method for masking selected areas of a glass, glass-ceramic, or ceramic surface against subsequently-applied coating compositions. The method contemplates three general steps: (a) a molten thermoplastic masking coating consisting essentially of about 10-60% bentonite clay, 0-40% of a refractory metal oxide, and 40-80% of a thermoplastic organic medium is applied from a heated surface onto the surface of an elastomeric or silicone-coated body; (b) the thermoplastic coating is cooled thereon to a temperature at which the coating exhibits sufficient tack and cohesiveness to permit transfer from the elastomeric or silicone-coated body; and (c) the so-coated body is brought into contact with the surface of a glass, glass-ceramic, or ceramic article to transfer the coating thereto.
Inventors
- 👤 James F. Dix
- 👤 Clarence E. Ford, Jr.
- 👤 Ray B. Forker, Jr.
- 👤 Ronald E. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:09
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C03; C03C; C03C17/00; C03C17/006; C03C17/008; C03C17/009; C04B41/45; C04B41/4505; C04B41/80; C04B41/81; Y; Y10; Y10S; Y10S524/00; Y10S524/905
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
135 words
A method for masking selected areas of a glass, glass-ceramic, or ceramic surface against coating compositions which comprises the steps of: (a) applying a thermoplastic molten masking coating consisting essentially, in weight percent, of about 10-60% bentonite clay, 0-40% of a refractory metal oxide, and 40-80% thermoplastic organic medium from a heated surface onto the surface of an elastomeric or silicone-coated body; (b) cooling said masking coating on said elastomer or silicone-coated body to a temperature at which said coating exhibits sufficient tack and cohesiveness to enable transfer of the resultant coating from the elastomeric or silicone-coated body to the surface to be masked; (c) bringing said elastomeric or silicone-coated body into contact with the surface of a glass, glass-ceramic, or ceramic article to transfer said coating to said article surface in said selected areas.
Claim 2
Independent Claim
135 words
A method for masking selected areas of a glass, glass-ceramic, or ceramic surface against coating compositions which comprises the steps of: (a) applying a thermoplastic molten masking coating consisting essentially, in weight percent, of about 10-60% bentonite clay, 0-40% of a refractory metal oxide, and 40-80% thermoplastic organic medium from a heated surface onto the surface of an elastomeric or silicone-coated body; (b) cooling said masking coating on said elastomer or silicone-coated body to a temperature at which said coating exhibits sufficient tack and cohesiveness to enable transfer of the resultant coating from the elastomeric or silicone-coated body to the surface to be masked; (c) bringing said elastomeric or silicone-coated body into contact with the surface of a glass, glass-ceramic, or ceramic article to transfer said coating to said article surface in said selected areas.
Claim 3
Dependent Claim
30 words
A method according to claim 1 wherein said refractory metal oxide is selected from the group consisting of silica, titania, iron oxide, tin oxide, calcium oxide, and 96% silica glass.
Claim 4
Dependent Claim
30 words
A method according to claim 1 wherein said thermoplastic masking coating demonstrates an R&B softening point between about 50°-95° C. and a viscosity at 100° C. of about 100-1000 poises.
Claim 5
Dependent Claim
180 words
A method according to claim 3 wherein said organic medium consists essentially, in weight percent, of about 10-40% of an ethylene-ester copolymer resin having about 8-40% by weight of a copolymerized resin selected from the group consisting of vinyl alcohol esters of C 1 -C 4 saturated monocarboxylic acids and C 1 -C 5 saturated alcohol esters of acrylic or methacrylic acid, the molecular weight of the copolymer being such as to yield a melt index, as defined by ASTM D1238, of about 20-400 g/10 minutes; about 20-40% of an amorphous tackifying resin having an R&B softening point of about 40°-110° C.; 0-20% of a modifying polyolefin resin selected from the group consisting of a low molecular weight polyethylene resin with a melt index, as defined by ASTM D1238, greater than about 20 g/10 minutes and an amorphous polypropylene resin having a melt viscosity of about 500-15,000 cps at 375° F.; and about 20-50% of an organic wax and/or plasticizer compatible with the above three groups of resins and having and R&B softening point of less than about 100° C.
Claim 6
Dependent Claim
32 words
A method according to claim 1 wherein said thermoplastic masking coating demonstrates an R&B softening point less than about 65° C. and a viscosity at about 93° C. of about 150-600 poises.
Claim 7
Dependent Claim
99 words
A method according to claim 5 wherein said organic medium consists essentially, in weight percent, of about 20-70% of a polyoxyalkylene ether having a softening point less than about 35° C. and a molecular weight between about 200-10,000; about 10-45% of a water soluble, cohesive strength imparting polymer having a molecular weight between 25,000-500,000; and 0-45% of a modifying wax and/or plasticizer selected from the group consisting of a polyoxyalkylene ether wax having a softening point between about 35°-65° C. and a molecular weight between about 1000-25,000 and a compatible ester having a softening point below about 65° C.
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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) | 1984-05-11 | 1984-11-10 | 1985-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-11 | 1988-11-10 | 1989-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-11 | 1992-11-10 | 1993-05-12 | $7700.00 | Window Closed / Lapsed |