Method for rendering vitreous surfaces water repellant and dirt deposit resistant and articles produced thereby
First Claim
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1. A method for producing water repellant and dirt deposit resistant characteristics on a vitreous surface of an article, the method comprising:
- a. heating an article having a vitreous surface to a surface temperature of above about 400°
C. until the surface of said article is substantially free of water;
b. adjusting the surface temperature of said article to from about 310°
to about 370°
C. and applying to the surface of said article a siliconizing medium comprising an organosiloxane having at least one silicon-carbon bond; and
c. allowing said article to cool to ambient temperature.
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Abstract
Articles having a scrub resistant, water repellant and dirt resistant vitreous surface are provided by (a) heating the article to a surface temperature above 400°C, until the surface becomes free of water; (b) adjusting the surface temperature to between 310° and 370°C. and applying a siliconizing medium comprising an organosiloxane; and (c) allowing the article to cool to ambient temperature.
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Citations
41 Claims
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1. A method for producing water repellant and dirt deposit resistant characteristics on a vitreous surface of an article, the method comprising:
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a. heating an article having a vitreous surface to a surface temperature of above about 400°
C. until the surface of said article is substantially free of water;b. adjusting the surface temperature of said article to from about 310°
to about 370°
C. and applying to the surface of said article a siliconizing medium comprising an organosiloxane having at least one silicon-carbon bond; andc. allowing said article to cool to ambient temperature. - View Dependent Claims (2, 3, 10, 11, 31)
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4. A method for producing water repellant and dirt deposit resistant characteristics on a vitreous surface of an article, the method comprising:
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a. heating an article having a vitreous surface to a surface temperature of above about 400°
C. until the surface of said article is substantially free of water;b. adjusting the surface temperature of said article to from about 310°
to about 370°
C. and applying to the surface of said article a siliconizing medium comprising an organosiloxane; andc. allowing said article to cool to ambient temperature, wherein said siliconizing medium comprises an organopolysiloxane having hydroxy or alkoxy terminal groups, and wherein said organopolysiloxane is substituted with silicon-bonded alkyl groups, silicone-bonded aryl groups, silicon-bonded alkenyl groups, silicon-bonded alkaryl groups, silicon-bonded aralkyl groups, silicon-bonded cycloaliphatic groups, or a mixture of any of the foregoing. - View Dependent Claims (5, 6, 7, 8, 9, 12, 13, 14, 32, 33, 34)
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15. An article having a water repellant and dirt resistant vitreous surface, the water repellant and dirt resistant characteristics of the surface having been provided by the method comprising:
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a. heating an article having a vitreous surface to a surface temperature of above about 400°
C. until the surface of said article is substantially free of water;b. adjusting the surface temperature of said article to from about 310°
to about 370°
C. and applying to the surface of said article a siliconizing medium comprising an organosiloxane capable of producing enhanced water repellent and dirt deposit resistant surface characteristics thereon, said organosiloxane having at least one silicon-carbon bond; andc. allowing said article to cool to ambient temperature. - View Dependent Claims (16, 17, 18, 25, 26, 37)
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19. An article having a water repellant and dirt resistant vitreous surface, the water repellant and dirt resistant characteristics of the surface having been provided by the method comprising:
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a. heating an article having a vitreous surface to a surface temperature of above about 400°
C. until the surface of said article is substantially free of water;b. adjusting the surface temperature of said article to from about 310°
to about 370°
C. and applying to the surface of said article a siliconizing medium comprising an organopolysiloxane capable of producing enhanced water repellant and dirt resistant surface characteristics thereon; andc. allowing said article to cool to ambient temperature, wherein said siliconizing medium comprises an organopolysiloxane having hydroxy or alkoxy terminal groups and wherein said organopolysiloxane is substituted with silicon-bonded alkyl groups, silicon-bonded aryl groups, silicon-bonded alkenyl groups, silicon-bonded alkaryl groups, silicon-bonded aralkyl groups, silicon-bonded cycloaliphatic groups, or a mixture of any of the foregoing. - View Dependent Claims (20, 21, 22, 23, 24, 27, 28, 29, 30, 35, 36, 38)
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39. A method for improving the surface characteristics of a vitreous surface of an article by a treatment comprising:
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a. heating an article having a vitreous surface to a surface temperature of above about 400°
C. for a period of 5 to 30 minutes until the surface of said article is substantially free of water;b. adjusting the surface temperature of said article to from about 310°
to about 370°
C. and applying to the surface of said article a siliconizing medium comprising an organosiloxane capable of producing enhanced and durable water repellent and dirt deposit resistant surface characteristics thereon, said organosiloxane having at least one silicon-carbon bond; andc. allowing said article to cool to ambient temperature.
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40. A method for improving the surface characteristics of a vitreous surface of an article by a treatment comprising:
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a. heating an article having a vitreous surface to a surface temperature of above about 400°
C. for a period of 5 to 30 minutes until the surface of said article is substantially free of water; andb. adjusting the surface temperature of said article to from about 310°
to about 370°
C. and applying to the surface of said article a siliconizing medium comprising a blend of an organopolysiloxane of the formula;
##EQU10## and corresponding to the product of hydrolyzing 50-75% by weight of (CH3)2 SiCl2 ;
1-10% by weight of (CH3)3 SiCl; and
10-35% by weight of CH3 SiCl3, and a second organopolysiloxane copolymer of the formula;
##EQU11## wherein d is from about 0.14 to about 0.25, e is 1.0 and said diphenylsiloxy units amount to about 28 to 40% of the total weight of recurring units; andc. allowing said article to cool to ambient temperature.
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41. An article having a water repellent and dirt resistant vitreous surface, the water repellent and dirt resistant characteristics of the surface having been provided by the method comprising:
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a. heating an article having a vitreous surface to a surface temperature of above about 400°
C. for a period of at least about 5 minutes until the surface of said article is substantially free of water;b. adjusting the surface temperature of said article to from about 310°
to about 370°
C. and applying to the surface of said article a siliconizing medium comprising a blend of an organopolysiloxane of the formula;
##EQU12## and corresponding to the product of hydrolyzing 50-75% by weight of (CH3)2 SiCl2 ;
1-10% by weight of (CH3)3 SiCl; and
10-35% by weight of CH3 SiCl3, and a second organopolysiloxane copolymer of the formula;
##EQU13## wherein d is from about 0.14 to about 0.25, e is 1.0 and said diphenylsiloxy units amount to about 28 to 40% of the total weight of recurring units; andc. allowing said article to cool to ambient temperature.
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Specification