US4526910A
Expired / Lapsed
US
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High-solids coating composition for improved rheology control containing inorganic microparticles
Assignee: PPG Industries Ohio Inc
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Filing: 1983-09-06
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Granted: 1985-07-02
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Expires: 2003-09-06
Abstract
Abstract Disclosed is an essentially solvent-based, organic, high-solids coating composition containing (A) a film-forming binder system containing a crosslinkable resin having a weight average molecular weight of from about 500 to about 10,000; (B) substantially colorless, substantially inorganic microparticles stably dispersed in the coating composition; and (C) a solvent system for the crosslinkable resin. The substantially inorganic microparticles prior to incorporation in the coating composition range in size from about 1 to about 150 nanometers and are in the form of a sol of the microparticles in which the surface of the inorganic microparticles is essentially free of carbon-containing molecules chemically bonded to the inorganic microparticles.
Inventors
- 👤 Suryya K. Das
- 👤 Paul P. Greigger
- 👤 William G. Boberski
- 👤 James E. Jones
- 👤 Raymond F. Schappert
- 👤 Jerome A. Seiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:33
CPC Classifications
C; C09; C09D; C09D7/00; C09D7/40; C09D7/66; C09D7/67; C08; C08K; C08K3/00; C08K3/34; C08K3/36
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
177 words
As essentially solvent-based, organic, high solids coating composition which is conventionally sprayable at high-solids comprising: (A) a film-forming binder system containing a crosslinkable resin having a weight average molecular weight of from about 500 to about 10,000, and optionally a crosslinking agent for the crosslinkable resin; (B) substantially colorless, substantially inorganic microparticles stably dispersed in the coating composition, the microparticles prior to incorporation in the coating composition ranging in size from about 1 to about 150 nanometers and in the form of a sol of the microparticles in which the surface of the inorganic microparticles is essentially free of carbon-containing molecules chemically bonded to the inorganic microparticles; and (C) a solvent system for the crosslinkable resin and the optional crosslinking agent; wherein the crosslinkable resin is in an amount of from about 15 to about 95 percent by weight and the substantially inorganic microparticles are in an amount of from about 1 to about 20 percent by weight, based on the sum of the weights of the crosslinkable resin, the optional crosslinking agent, and the inorganic microparticles.
Claim 2
Dependent Claim
177 words
As essentially solvent-based, organic, high solids coating composition which is conventionally sprayable at high-solids comprising: (A) a film-forming binder system containing a crosslinkable resin having a weight average molecular weight of from about 500 to about 10,000, and optionally a crosslinking agent for the crosslinkable resin; (B) substantially colorless, substantially inorganic microparticles stably dispersed in the coating composition, the microparticles prior to incorporation in the coating composition ranging in size from about 1 to about 150 nanometers and in the form of a sol of the microparticles in which the surface of the inorganic microparticles is essentially free of carbon-containing molecules chemically bonded to the inorganic microparticles; and (C) a solvent system for the crosslinkable resin and the optional crosslinking agent; wherein the crosslinkable resin is in an amount of from about 15 to about 95 percent by weight and the substantially inorganic microparticles are in an amount of from about 1 to about 20 percent by weight, based on the sum of the weights of the crosslinkable resin, the optional crosslinking agent, and the inorganic microparticles.
Claim 3
Dependent Claim
11 words
The coating composition of claim 1 wherein the microparticles comprise silica.
Claim 4
Dependent Claim
12 words
The coating composition of claim 2 wherein the sol is an organosol.
Claim 5
Dependent Claim
26 words
The coating composition of claim 1 wherein the microparticles prior to incorporation in the coating composition range in size from about 1 to about 100 nanometers.
Claim 6
Dependent Claim
26 words
The coating composition of claim 1 wherein the microparticles prior to incorporation in the coating composition range in size from about 3.5 to about 50 nanometers.
Claim 7
Dependent Claim
29 words
The coating composition of claim 3 wherein the silica has been incorporated in an alcohol in the form of a stable colloidal dispersion of the silica in the alcohol.
Claim 8
Dependent Claim
21 words
The coating composition of claim 6 wherein the alcohol is selected from a monohydric alcohol, a polyol or a mixture thereof.
Claim 9
Dependent Claim
48 words
The coating composition of claim 1 wherein the microparticles comprise silica prepared from the hydrolysis of a compound selected from the group consisting of a tetraalkylorthosilicate, an alkoxypolysiloxane, an alkylalkoxysilane, and a mixture thereof, in the presence of a base in a medium of pH greater than 7.0.
Claim 10
Dependent Claim
25 words
The coating composition of claim 8 wherein the compound is a tetraalkylorthosilicate selected from the group consisting of tetramethylorthosilicate, tetraethylorthosilicate, tetrapropylorthosilicate, and a mixture thereof.
Claim 11
Dependent Claim
24 words
The coating composition of claim 1 which is conventionally sprayable at a solids content of at least 40 percent by weight of the composition.
Claim 12
Dependent Claim
42 words
The coating composition of claim 2 wherein the amount of the silica in the coating composition ranges from about 1 to about 20 percent by weight based on the sum by weight of the crosslinkable resin, optional crosslinking agent, and the silica.
Claim 13
Dependent Claim
34 words
The coating composition of claim 1 additionally comprising organic polymeric microparticles which are insoluble in the solvent system and which have a diameter in the range of from about 0.01 to about 40 microns.
Claim 14
Dependent Claim
180 words
An essentially solvent-based, organic high-solids coating composition which is conventionally sprayable at high-solids comprising: (A) a film-forming binder system containing a crosslinkable resin having a weight average molecular weight of from about 500 to about 10,000, and optionally a crosslinking agent for the crosslinkable resin; (B) substantially colorless, substantially inorganic, microparticles stably dispersed in the coating composition, the microparticles prior to incorporation in the coating composition ranging is size from about 1 to about 150 nanometers and in the form of a sol of the microparticles in which the surface of the inorganic microparticles is essentially free of carbon-containing molecules chemically bonded to the inorganic microparticles; (C) a solvent system for the crosslinkable resin and the optional crosslinking agent; and (D) a metallic-flake pigment, wherein the crosslinkable resin is in an amount of from about 15 to about 95 percent by weight and the substantially inorganic microparticles are in an amount of from about 1 to about 20 percent by weight, based on the sum of the weights of the crosslinkable resin, the optional crosslinking agent, and the inorganic microparticles.
Claim 15
Dependent Claim
180 words
An essentially solvent-based, organic high-solids coating composition which is conventionally sprayable at high-solids comprising: (A) a film-forming binder system containing a crosslinkable resin having a weight average molecular weight of from about 500 to about 10,000, and optionally a crosslinking agent for the crosslinkable resin; (B) substantially colorless, substantially inorganic, microparticles stably dispersed in the coating composition, the microparticles prior to incorporation in the coating composition ranging is size from about 1 to about 150 nanometers and in the form of a sol of the microparticles in which the surface of the inorganic microparticles is essentially free of carbon-containing molecules chemically bonded to the inorganic microparticles; (C) a solvent system for the crosslinkable resin and the optional crosslinking agent; and (D) a metallic-flake pigment, wherein the crosslinkable resin is in an amount of from about 15 to about 95 percent by weight and the substantially inorganic microparticles are in an amount of from about 1 to about 20 percent by weight, based on the sum of the weights of the crosslinkable resin, the optional crosslinking agent, and the inorganic microparticles.
Claim 16
Dependent Claim
11 words
The coating composition of claim 13 wherein the microparticles comprise silica.
Claim 17
Dependent Claim
12 words
The coating composition of claim 14 wherein the sol is an organosol.
Claim 18
Dependent Claim
26 words
The coating composition of claim 13 wherein the microparticles prior to incorporation in the coating composition range in size from about 1 to about 100 nanometers.
Claim 19
Dependent Claim
26 words
The coating composition of claim 13 wherein the microparticles prior to incorporation in the coating composition range in size from about 3.5 to about 50 nanometers.
Claim 20
Dependent Claim
56 words
The coating composition of claim 14 wherein the amount of crosslinkable resin plus crosslinking agent ranges from about 80 to about 99 percent by weight, and the amount of silica ranges from about 1 to about 20 percent by weight, both percentages being based on the sum by weight of crosslinkable resin, crosslinking agent and silica.
Claim 21
Dependent Claim
25 words
The coating composition of claim 13 which is conventionally sprayable at a solids content of at least 40 percent by weight of the coating composition.
Claim 22
Dependent Claim
13 words
The coating composition of claim 14 wherein the metallic-flake pigment comprises aluminum flakes.
Claim 23
Dependent Claim
33 words
The coating composition of claim 13 additionally comprising organic polymeric microparticles which are insoluble in the solvent system and which have a diameter in the range of from about 0.01 to about 40.
Claim 24
Dependent Claim
10 words
A substrate coated with the coating composition of claim 2.
Claim 25
Dependent Claim
10 words
A substrate coated with the coating composition of claim 3.
Claim 26
Dependent Claim
10 words
A substrate coated with the coating composition of claim 11.
Claim 27
Dependent Claim
10 words
A substrate coated with the coating composition of claim 20.
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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) | 1988-07-01 | 1988-12-31 | 1989-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-01 | 1992-12-31 | 1993-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-01 | 1996-12-31 | 1997-07-02 | $7700.00 | Window Closed / Lapsed |