US4439239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pigmented coating composition containing a mixture of alkoxysilanes
Assignee: PPG Industries Inc
•
Filing: 1982-06-02
•
Granted: 1984-03-27
•
Expires: 2002-06-02
Abstract
Abstract Disclosed are coating compositions containing pigment in a vehicle comprising a dispersion of colloidal silica, a mixture of a hydrolyzable trialkoxysilane and a hydrolyzable dialkoxysilane, alcohol, water and sufficient acidifying agent to provide a pH of the vehicle ranging from about 2.8 to about 6.0.
Inventors
- 👤 Paul P. Greigger
- 👤 William G. Boberski
- 👤 Jerome A. Seiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:58
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B26/00; C04B26/30; C04B26/32; C09; C09D; C09D183/00; C09D183/04; C04B2111/00; C04B2111/00474; C04B2111/00482
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
133 words
A composition comprising: I. a pigment in an amount ranging from about 10 to about 80 percent by volume solids based on the total volume of solids present in said composition; in II. a vehicle comprising, A. a dispersion of colloidal silica, B. a mixture of (i) a hydrolyzable trialkoxysilane and (ii) a hydrolyzable dialkoxysilane, C. an alcohol, D. water, and E. sufficient acidifying agent to provide a pH of the vehicle ranging from about 2.8 to about 6.0, wherein the ratio of the weight of the pigment to the weight of the sum of colloidal silica solids and alkoxysilane solids ranges from 0.1/1 to about 10/1, the alkoxysilane solids calculated assuming theoretically complete hydrolysis of the respective alkoxysilanes to the corresponding silanols, and wherein said composition cures to provide an opaque film.
Claim 2
Dependent Claim
133 words
A composition comprising: I. a pigment in an amount ranging from about 10 to about 80 percent by volume solids based on the total volume of solids present in said composition; in II. a vehicle comprising, A. a dispersion of colloidal silica, B. a mixture of (i) a hydrolyzable trialkoxysilane and (ii) a hydrolyzable dialkoxysilane, C. an alcohol, D. water, and E. sufficient acidifying agent to provide a pH of the vehicle ranging from about 2.8 to about 6.0, wherein the ratio of the weight of the pigment to the weight of the sum of colloidal silica solids and alkoxysilane solids ranges from 0.1/1 to about 10/1, the alkoxysilane solids calculated assuming theoretically complete hydrolysis of the respective alkoxysilanes to the corresponding silanols, and wherein said composition cures to provide an opaque film.
Claim 3
Dependent Claim
62 words
The composition of claim 1 wherein said hydrolyzable trialkoxysilane corresponds to the formula RSi(OR').sub.3 wherein, R is selected from the group consisting of alkyl radicals having 1 to 5 carbon atoms, the phenyl radical, the vinyl radical, the 3,3,3-trifluoropropyl radical, the gamma-glycidoxypropyl radical, and the gamma-methacryloxypropyl radical; and R' is selected from the group consisting of methyl, ethyl, n-propyl, isopropyl, and n-butyl.
Claim 4
Dependent Claim
66 words
The composition of claim 2 wherein said hydrolyzable dialkoxysilane corresponds to the formula RR" Si(OR').sub.2 wherein, R and R" independently are selected from the group consisting of alkyl radicals having 1 to 5 carbon atoms, the phenyl radical, the vinyl radical, the 3,3,3-trifluoropropyl radical, the gamma-glycidoxypropyl radical, and the gamma-methacryloxypropyl radical, and R' is selected from the group consisting of methyl, ethyl, n-propyl, isopropyl, and n-butyl.
Claim 5
Dependent Claim
42 words
The composition of claim 3 wherein the ratio by weight of said trialkoxysilane to said dialkoxysilane, respectively, ranges from about 93:7 to about 50:50, said ratio calculated on the basis of the hydrolyzed species assuming theoretically complete hydrolysis to the respective silanols.
Claim 6
Dependent Claim
125 words
The composition of claim 1 wherein said vehicle contains about 10 to about 60 percent by weight total solids based on the sum by weight of colloidal silica solids and alkoxysilane solids in the total weight of the vehicle, the alkoxysilane solids calculated assuming theoretically complete hydrolysis of the respective alkoxysilanes to the corresponding silanols; colloidal silica solids representing about 10 to about 80 percent by weight of said sum; alkoxysilane solids from said mixture representing about 20 to about 90 percent by weight of said sum; and wherein the ratio by weight of said trialkoxysilane to said dialkoxysilane, respectively, in said mixture ranges from about 93:7 to about 50:50, the weights of trialkoxysilane and dialkoxysilane calculated assuming theoretically complete hydrolysis to the corresponding silanols.
Claim 7
Dependent Claim
15 words
The composition of claim 1 wherein said trialkoxysilane comprises methyltrimethoxysilane and said dialkoxysilane comprises dimethyldimethoxysilane.
Claim 8
Dependent Claim
31 words
The composition of claim 5 wherein said water is in an amount ranging from about 1 percent to about 90 percent by weight based on the total weight of said vehicle.
References Cited (Backward Citations)
US2610167A
Cited
US2568384A
Cited
US2676182A
Cited
US2786042A
Cited
US3232771A
Cited
US3435001A
Cited
US3682668A
Cited
US3894881A
Cited
US4218354A
Cited
US3976497A
Cited
US3986997A
Cited
US4027073A
Cited
US4016129A
Cited
US3959566A
Cited
US4127697A
Cited
US4113665A
Cited
US4177315A
Cited
US4170690A
Cited
US4159206A
Cited
US4223072A
Cited
US4173553A
Cited
US4197230A
Cited
US4243692A
Cited
US4173490A
Cited
US4229228A
Cited
US4207357A
Cited
GB2036054A
Cited
GB2036053A
Cited
US4299746A
Cited
US4308315A
Cited
US4275118A
Cited
US4290811A
Cited
US4311738A
Cited
US4278804A
Cited
US4390373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |