US4238387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rheology control additive for paints
Assignee: EIDP Inc
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Filing: 1978-11-20
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Granted: 1980-12-09
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Expires: 1998-11-20
Abstract
Abstract An Additive for solvent or water based coating compositions which controls the sag of finishes of such compositions; wherein the additive comprises (a) a finely divided silica, (b) a polyfunctional acid or an acid anhydride and (c) an amine. High polymer solids water or solvent based coating compositions containing such an additive are useful for coating metal substrates such as those used in appliances, automobiles and trucks.
Inventors
- 👤 Joseph A. Antonelli
- 👤 Souheng Wu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:31
CPC Classifications
C; C09; C09D; C09D7/00; C09D7/40; C09D7/43; C09D7/44; C08; C08K; C08K3/00; C08K3/32; C08K3/34; C08K3/36; C08K5/00; C08K5/16; C08K5/17
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
82 words
An additive comprising about: (a) 40-98% by weight based on the weight of the additive, of finely divided silica; (b) 1-40% by weight, based on the weight of the additive, of a polyfunctional acid constituent selected from the group consisting of a polyfunctional carboxylic acid, an anhydride or a polyfunctional carboxylic acid, phosphoric acid or polysulfonic acid, and (c) 1-15% by weight, based on the weight of the additive, of an amine; wherein the total of (a), (b) and (c) equals 100%.
Claim 2
Dependent Claim
82 words
An additive comprising about: (a) 40-98% by weight based on the weight of the additive, of finely divided silica; (b) 1-40% by weight, based on the weight of the additive, of a polyfunctional acid constituent selected from the group consisting of a polyfunctional carboxylic acid, an anhydride or a polyfunctional carboxylic acid, phosphoric acid or polysulfonic acid, and (c) 1-15% by weight, based on the weight of the additive, of an amine; wherein the total of (a), (b) and (c) equals 100%.
Claim 3
Dependent Claim
78 words
The additive of claim 1 which consists essentially of about (a) 50-90% by weight, based on the weight of the additive, of finely divided silica, (b) 5-35% by weight, based on the weight of the additive, of a polyfunctional acid constituent selected from the group consisting of a polyfunctional carboxylic acid, an anhydride of a polyfunctional carboxylic acid, phosphoric acid or polysulfonic acid and (c) 5-15% by weight, based on the weight of the additive, of an amine.
Claim 4
Dependent Claim
34 words
The additive of claim 2 in which the silica is fumed silica having a particle size of about 0.002 to 1.0 micrometers and a surface area of 2.5 to 1,200 square meters per gram.
Claim 5
Dependent Claim
29 words
The additive of claim 2 in which the acid is selected from the group consisting of citric acid, dinonyl naphthalene disulfonic acid, maleic acid, maleic anhydride and phosphoric acid.
Claim 6
Dependent Claim
14 words
The additive of claim 2 in which the amine is an alkyl alkanol amine.
Claim 7
Dependent Claim
18 words
The additive of claim 3 in which the amine is diethanolamine, triethanolamine, dimethylethanolamine diethylethanolamine, diethylenetriamine or triethylene tetraamine.
Claim 8
Dependent Claim
22 words
The additive of claim 3 in which the silica is fumed silica, the acid is citric acid and the amine is diethanolamine.
Claim 9
Dependent Claim
25 words
The additive of claim 3 in which the silica is fumed silica, the acid is dinonyl napthalene disulfonic acid and the amine is dimethylethanol amine.
Claim 10
Dependent Claim
22 words
The additive of claim 3 in which the silica is fumed silica, the acid is phosphoric acid and the amine is diethanolamine.
Claim 11
Dependent Claim
22 words
The additive of claim 3 in which the silica is fumed silica, the anhydride is maleic anhydride and the amine is diethanolamine.
Claim 12
Dependent Claim
22 words
The additive of claim 3 in which the silica is fumed silica, the anhydride is succinic anhydride and the amine is diethanolamine.
Claim 13
Dependent Claim
10 words
The additive of claim 1 which contains an alkylene oxide.
Claim 14
Dependent Claim
30 words
The additive of claim 3 in which the silica is a fumed silica, the acid anhydride is maleic anhydride, the amine is diethanolamine and the additive contains an alkylene oxide.
Claim 15
Dependent Claim
22 words
A coating composition containing about 1-15% by weight, based on the weight of the coating composition, of the additive of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |