Patent US4797444A successfully refreshed from Google Patents.
US4797444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waterborne pigmented acrylic hydrosol coating composition and process
Assignee: BASF Corp
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Filing: 1987-02-03
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Granted: 1989-01-10
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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 18:36
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.
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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) | 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 |