US4548646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thixotropic coating compositions and methods
Assignee: Technology Holding Co II
•
Filing: 1982-11-15
•
Granted: 1985-10-22
•
Expires: 2002-11-15
Abstract
Abstract A coating composition which is thixotropic, that is, which is a gel when not subject to movement and a liquid when subject to movement. It comprises a non-ionic surfactant, an acid-stable, non-colloidal amorphous silica and a phosphate type acid binder aqueous solution.
Inventors
- 👤 Mark F. Mosser
- 👤 William J. Fabiny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:28
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/08; C04; C04B; C04B28/00; C04B28/34; C04B28/342; C23; C23C; C23C22/00; C23C22/73; C23C22/74; C04B2103/00; C04B2103/40; C04B2111/00; C04B2111/00034; C04B2111/00086; C04B2111/00112; C04B2111/0012; C04B2111/00474; C04B2111/00482; C04B2111/00525
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
68 words
An acid and stable thixotropic coating composition especially suitable for dipspin application which comprises (a) an acid binder aqueous solution which comprises phosphate ions and ions of the group of chromate ions or molybdate ions, and (b) an acid-stable, non-colloidal amorphous silica and (c) a nonionic surfactant, which composition is in a gel state when not subject to movement and in a liquid state when subject to movement.
Claim 2
Dependent Claim
68 words
An acid and stable thixotropic coating composition especially suitable for dipspin application which comprises (a) an acid binder aqueous solution which comprises phosphate ions and ions of the group of chromate ions or molybdate ions, and (b) an acid-stable, non-colloidal amorphous silica and (c) a nonionic surfactant, which composition is in a gel state when not subject to movement and in a liquid state when subject to movement.
Claim 3
Dependent Claim
30 words
The stable thixotropic coating composition of claim 1 wherein the nonionic surfactant is from the group of polyoxyethylene, ethoxylated alkylphenol, ethoxylated aliphatic alcohol, carboxylic esters, and polyoxyalkylene oxide block polymers.
Claim 4
Dependent Claim
22 words
The stable thixotropic coating composition of claim 1 wherein the amorphous silica is hydrogen-bonded to the binder and/or to the nonionic surfactant.
Claim 5
Dependent Claim
22 words
The stable thixotropic coating composition of claim 1 wherein the pH range of the composition is from about 0.5 to about 3.0.
Claim 6
Dependent Claim
22 words
The stable thixotropoic coating composition of claim 1 wherein the pH range of the composition is from about 1.5 to about 2.0.
Claim 7
Dependent Claim
19 words
The stable thixotropic coating composition of claim 1 wherein the viscosity ranges from about 600 to about 45,000 cp.
Claim 8
Dependent Claim
19 words
The stable thixotropic coating composition of claim 1 wherein the viscosity ranges from about 800 to about 4,500 cp.
Claim 9
Dependent Claim
15 words
The stable thixotropic coating composition of claim 1 wherein the amorphous silica is fumed silica.
Claim 10
Dependent Claim
14 words
The stable thixotropic coating composition of claim 1 wherein the silica is silica gel.
Claim 11
Dependent Claim
14 words
The stable thixotropic coating composition of claim 1 wherein the silica is precipitated silica.
Claim 12
Dependent Claim
19 words
The stable thixotropic coating composition of claim 1 wherein the nonionic surfactant has a plurality of hydroxyl functional groups.
Claim 13
Dependent Claim
16 words
The stable thixotropic coating composition of claim 11 wherein the nonionic surfactant is an ethoxylated alkylphenol.
Claim 14
Dependent Claim
22 words
The stable thixotropic coating composition of claim 12 wherein the alkyl of the alkyl phenol is of 8 to 9 carbon atoms.
Claim 15
Dependent Claim
13 words
The stable thixotropic coating composition of claim 13 wherein the alkyl is t-octyl.
Claim 16
Dependent Claim
20 words
The stable thixotropic coating composition of claim 2 wherein the nonionic surfactant is polyethylene glycol or ethylene glycol mono-butyl ether.
Claim 17
Dependent Claim
24 words
The stable thixotropic coating composition of claim 15 wherein the polyethylene glycol has a molecular weight in the range of about 400 to 14,000.
Claim 18
Dependent Claim
30 words
The stable thixotropoic coating composition of clam 1 wherein the amount of nonionic surfactant is in the range of about 0.01 to about 0.5 percent by weight of total solids.
Claim 19
Dependent Claim
30 words
The stable thixotropoic coating composition of clam 1 wherein the amount of nonionic surfactant is in the range of about 0.01 to about 0.5 percent by weight of total solids.
Claim 20
Dependent Claim
28 words
The stable thixotropic coating composition of claim 1 wherein the proportion of amorphous silica is below the range at which the coating made with the composition is brittle.
Claim 21
Dependent Claim
30 words
The stable thixotropic coating composition of claim 18 wherein the proportion of amorphous silica is in the range from about 0.5 to about 15 percent by weight of total solids.
Claim 22
Dependent Claim
43 words
The stable thixotropic coating composition of claims 1 or 3 which comprises a particulate solid material of the following: aluminum, zinc, an oxide of the following: silicon, zirconium, beryllium or aluminum, iron, chromium, a refractory carbide, nitride, silicide, or boride, or alloys thereof.
Claim 23
Dependent Claim
19 words
The stable thixotropic coating composition of claim 20 wherein the particulate solid material is aluminum or an aluminum alloy.
Claim 24
Dependent Claim
23 words
The stable thixotropic coating composition of claim 21 wherein the particulate solid material is of an average particle size below about 10 microns.
Claim 25
Dependent Claim
16 words
The stable thixotropic coating composition of claim 1 which comprises a gel of a reduced chromate.
Claim 26
Dependent Claim
19 words
The stable thixotropic coating composition of claim 23 wherein the gel is of a reduced water-soluble or water-insoluble chromate.
Claim 27
Dependent Claim
14 words
The stable thixotropic coating composition of claim 24 wherein the chromate is a dichromate.
Claim 28
Dependent Claim
26 words
The stable thixotropic coating composition of claim 24 wherein the gel is an insoluble Cr (OH) 3 and/or a Cr 2 (CrO 4 ) 3 gel.
Claim 29
Dependent Claim
23 words
The stable thixotropic coating composition of claims 1 or 3 which comprises a gel of a reduced chromate, which chromate is a dichromate.
Claim 30
Dependent Claim
14 words
The stable thixotropic coating composition of claim 27 which comprises a particulate solid material.
Claim 31
Dependent Claim
19 words
The stable thixotropic coating composition of claim 28 wherein the particulate solid material is aluminum or an aluminum alloy.
Claim 32
Dependent Claim
22 words
The stable thixotropic coating composition of claim 29 wherein the aluminum particles are of an average size not exceeding about 10 microns.
Claim 33
Dependent Claim
28 words
The stable thixotropic coating composition of claims 1 or 3 wherein the acid binder aqueous solution comprises dissolved metal ions of the group of magnesium, aluminum or zinc.
Claim 34
Dependent Claim
21 words
The stable thixotropic coating composition of claim 1 wherein said composition has a solid content of about 30 to about 55%.
Claim 35
Dependent Claim
18 words
The stable thixotropic composition of claim 32 which has a viscosity of about 800 to about 4500 cp.
Claim 36
Dependent Claim
41 words
The acid stable thixotropic coating composition of claim 1 wherein the amorphous silica is an aggregate or agglomerate of a size of about 1 to about 5 microns of particles of an average particle size of less than about 1 micron.
Claim 37
Dependent Claim
14 words
The stable thixotropic coating composition of claim 1 wherein the nonionic surfactant is water-soluble.
Claim 38
Dependent Claim
17 words
The stable thixotropic coating composition of claim 35 wherein the nonionic surfactant cross-links with the amorphous silica.
Claim 39
Dependent Claim
17 words
The acid-stable thixotropic coating composition of claim 36 wherein the amorphous silica is free of stabilizing ions.
References Cited (Backward Citations)
US2465247A
Cited
US3081146A
Cited
US3248249A
Cited
US3248251A
Cited
US3420715A
Cited
US3562011A
Cited
US3679493A
Cited
US3869293A
Cited
US4319924A
Cited
US4238534A
Cited
US4227946A
Cited
US4373968A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-21 | 1989-04-22 | 1989-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-21 | 1993-04-22 | 1993-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-21 | 1997-04-22 | 1997-10-22 | $7700.00 | Window Closed / Lapsed |