US3958073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Properties of glass surfaces
Assignee: Fidenza Vetraria SpA SA
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Filing: 1973-07-09
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Granted: 1976-05-18
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Expires: 1993-07-09
Abstract
Abstract Glass having improved hydrolytic and chemical resistance as well as improved water repellency and mechanical characteristics is obtained by reacting the glass surface with an organoborosiloxane polymer, substituted by one or more of alkyl, aryl, alkoxy, acyl radicals, said organoborosiloxane polymer containing no free hydroxy groups in the presence of one or more organic Ti, Zr, Sn, v compounds at a temperature comprised between 200° and 400°C in order to obtain, through a grafting reaction, a superficial layer of modified glass.
Inventors
- 👤 Gianfranco Trevisan
- 👤 Francesco Mascaro
- 👤 Corrado Brichta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:42
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/28; C03C17/30; C08; C08G; C08G83/00; C08G83/001; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
141 words
Process for imparting to glass surfaces a greater hydrolytic and chemical resistance, with water-repelling properties and improved mechanical characteristics, wherein the glass surface is treated with an organoborosiloxane polymer substituted by one or more radicals selected from the group consisting of alkyl, aryl, alkoxy and acyl radicals, said radicals being the same or different, said organoborosiloxane polymer containing no free hydroxyl groups, in the presence of one or more organic Ti, Zr, Sn, V compounds, and whereby the stoichiometric ratio of the metal to boron is comprised between 1:1 and 10:1, at a temperature of the glass comprised between 200° and C, C. to thereby obtain a reaction product from the reaction between the organoborosiloxane polymer and the organic compound containing metal atoms, said reaction product being in the form of an extremely thin layer chemically grafted onto the glass surface.
Claim 2
Dependent Claim
141 words
Process for imparting to glass surfaces a greater hydrolytic and chemical resistance, with water-repelling properties and improved mechanical characteristics, wherein the glass surface is treated with an organoborosiloxane polymer substituted by one or more radicals selected from the group consisting of alkyl, aryl, alkoxy and acyl radicals, said radicals being the same or different, said organoborosiloxane polymer containing no free hydroxyl groups, in the presence of one or more organic Ti, Zr, Sn, V compounds, and whereby the stoichiometric ratio of the metal to boron is comprised between 1:1 and 10:1, at a temperature of the glass comprised between 200° and C, C. to thereby obtain a reaction product from the reaction between the organoborosiloxane polymer and the organic compound containing metal atoms, said reaction product being in the form of an extremely thin layer chemically grafted onto the glass surface.
Claim 3
Dependent Claim
30 words
Process according to claim 1, wherein the organoborosiloxane polymer is substituted by alkyl radicals and the hydrogen atoms of the alkyl radicals are at least partially substituted by fluorine atoms.
Claim 4
Dependent Claim
19 words
Process according to claim 1 wherein the stoichiometric ratio Si:B of the organoborosiloxane polymer is between 100:1 and 500:1.
Claim 5
Dependent Claim
12 words
Process according to claim 1, wherein the organoborosiloxane polymer is a polydimethylborosiloxane.
Claim 6
Dependent Claim
12 words
Process according to claim 1, wherein the organoborosiloxane polymer contains γ-trifluoropropyl radicals.
Claim 7
Dependent Claim
57 words
Process according to claim 1, wherein the organic compounds containing metal atoms are Ti compounds selected from the group consisting of monomeric esters of titanic acid containing 4 alkoxy radicals per atom of titanium, Ti(OR) 4 , wherein R is alkoxy, and polymeric derivatives thereof containing less than 4 of the above mentioned radicals per Ti atom.
Claim 8
Dependent Claim
49 words
Process according to claim 1, wherein the organic compounds containing metal atoms are monomeric esters of zirconic acid containing 4 alkoxy radicals per atom of zirconium, Zr(OR) 4 , wherein R is alkoxy, and polymeric derivatives thereof containing less than 4 of the above mentioned radicals per zirconium atom.
Claim 9
Dependent Claim
17 words
Process according to claim 1, wherein as organic compound containing metal atoms there is used a butylacetyl-titanate-zirconate.
Claim 10
Dependent Claim
12 words
Process according to claim 1, wherein the organic compound is alcoholated tin.
Claim 11
Dependent Claim
27 words
Process according to claim 1, wherein the organic tin compounds are dialkyltincarboxylates of the formula R 2 Sn(OOCR') 2 , wherein R and R' are alkyl group.
Claim 12
Dependent Claim
16 words
Process according to claim 1, wherein as the organic tin compound there is used a diacetoxystannane.
Claim 13
Dependent Claim
12 words
Process according to claim 1, wherein the organic vanadium compound is triethylvanadate.
Claim 14
Dependent Claim
17 words
Process according to claim 1 wherein the heating is carried out at temperatures between 280° and 400°C.
Claim 15
Dependent Claim
18 words
Process according to claim 1, wherein the thickness of the modified glass layer is from 0.5 to 1.
Claim 16
Dependent Claim
10 words
Glass surfaces treated according to the process of claim 1.
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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) | 1979-05-18 | 1979-11-17 | 1980-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-18 | 1983-11-17 | 1984-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-18 | 1987-11-17 | 1988-05-18 | $7700.00 | Window Closed / Lapsed |