US4797444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waterborne pigmented acrylic hydrosol coating composition and process
Assignee: BASF Corp
•
Filing: 1987-02-03
•
Granted: 1989-01-10
•
Expires: 2007-02-03
Abstract
Abstract A waterborne pigmented liquid coating composition and method of making and using same which is substantially devoid of any surfactant dispersing and/or emulsifying agents thereby substantially eliminating flash-rusting upon application to ferrous substrates and improved resistance to deterioration on exposure to high moisture environments. The coating composition contains as its essential constituents one or a combination or mixture of substantially uniformly dispersed pigment particles, a film forming constituent comprising a mixture of substantially uniformly dispersed acrylic hydrosol particles and an aqueous soluble salt of a dispersant resin having acid functionality, and a liquid constituent comprising a mixture of water and organic solvents, the organic solvents functioning as coalescing agents for the film forming constituents.
Inventors
- 👤 Richard A. Cowles
- 👤 Nick Georgalas
- 👤 Shailesh C. Shah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:50
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/02; C09D133/00; C09D133/04; C09D133/06; C09D133/062; C09D133/064; C09D133/10; C09D133/12; C08; C08L; C08L33/00; C08L33/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
87 words
A waterborne pigmented coating composition comprising one or a combination or mixture of substantially uniformly dispersed pigment particles, a film forming constituent comprising a mixture of uniformly dispersed acrylic hydrosol particles and an aqueous soluble salt of a thermosettable dispersant polymer having acid functionality, the aqueous soluble salt having a volatile substituent, and a liquid constituent comprising a mixture of water and organic solvents, the organic solvents functioning as coalescing agents for the film forming constituents whereby the resulting composition is substantially free of surfactants and emulsifiers.
Claim 2
Dependent Claim
87 words
A waterborne pigmented coating composition comprising one or a combination or mixture of substantially uniformly dispersed pigment particles, a film forming constituent comprising a mixture of uniformly dispersed acrylic hydrosol particles and an aqueous soluble salt of a thermosettable dispersant polymer having acid functionality, the aqueous soluble salt having a volatile substituent, and a liquid constituent comprising a mixture of water and organic solvents, the organic solvents functioning as coalescing agents for the film forming constituents whereby the resulting composition is substantially free of surfactants and emulsifiers.
Claim 3
Dependent Claim
25 words
The coating composition as defined in claim 1 in which said liquid constituent comprises from about 35% to about 65% by weight of said composition.
Claim 4
Dependent Claim
18 words
The coating composition as defined in claim 1 in which said acrylic hydrosol particles are of colloidal dimensions.
Claim 5
Dependent Claim
30 words
The coating composition as defined in claim 1 in which said acrylic hydrosol particles are present in an amount of about 5% to about 40% by weight of said compositions.
Claim 6
Dependent Claim
29 words
The coating composition as defined in claim 1 in which said dispersant polymer is present in an amount of about 1% to about 5% by weight of said composition.
Claim 7
Dependent Claim
44 words
The coating composition as defined in claim 1 in which said water soluble salt comprises the reaction product of said dispersant polymer having acid functionality and a basic compound selected from the group consisting of ammonia, an organic amine as well as mixtures thereof.
Claim 8
Dependent Claim
17 words
The coating composition as defined in claim 1 in which said dispersant polymer is an acrylic polymer.
References Cited (Backward Citations)
GB1114133A
Cited
US3705124A
Cited
GB1109656A
Cited
GB1199157A
Cited
US3943187A
Cited
US4021396A
Cited
US4151143A
Cited
US4124555A
Cited
US4230609A
Cited
US4450253A
Cited
US4423165A
Cited
US4489188A
Cited
US4477609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-10 | 1992-07-11 | 1993-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-10 | 1996-07-11 | 1997-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-10 | 2000-07-11 | 2001-01-10 | $7700.00 | Window Closed / Lapsed |