Patent US5352726A successfully refreshed from Google Patents.
US5352726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Autodepositing composition containing vinylidene chloride based resin
Assignee: Henkel AG and Co KGaA
•
Filing: 1992-09-04
•
Granted: 1994-10-04
•
Expires: 2012-09-04
Abstract
Abstract Improved autodeposited coatings on metallic surfaces are formed by contacting the metallic surfaces with an autodepositing composition comprising an acidic aqueous coating solution containing dispersed solid resin particles of either an internally stabilized or externally stabilized vinylidene chloride polymer, an exemplary internally stabilized polymer being prepared from vinylidene chloride and a monomeric surfactant which includes an inorganic ionizable group, and an exemplary externally stabilized polymer being prepared from vinylidene chloride and a reactive comonomer, the resulting resin particles having surfactant adsorbed thereon, said autodeposited coatings having extremely good corrosion resistant properties without treatment with a reaction rinse such as a chromium rinse.
Inventors
- 👤 Wilbur S. Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:15
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; B05D7/142; B05D7/144; C; C08; C08F; C08F214/00; C08F214/02; C08F214/04; C08F214/08; C09; C09D; C09D5/00; C09D5/08; C09D5/088
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
151 words
An autodepositing composition comprising an acidic aqueous solution of activator consisting essentially of hydrofluoric acid in an amount sufficient to impart to the composition a pH within the range of about 1.6 to about 5.0 and a soluble ferric iron-containing compound in an amount equivalent to about 0.025 to about 3.5 g/l of ferric iron and having dispersed therein resin solids of an internally stabilized copolymer comprising: (A) at least about 80 wt. % of vinylidene chloride; (B) one or more monomers selected from the group consisting of methacrylic acid, acrylic acid, methyl methacrylate, methyl acrylate, ethyl acrylate, butyl acrylate, acrylonitrile, methacrylonitrile, vinyl chloride, acrylamide and methacrylamide; and (C) a water-soluble ionic material which includes an inorganic ionizable group and which has the formula: R--Z--Q--SO.sub.3 M.sup.+ wherein R is vinyl or alkyl substituted vinyl, Z is a difunctional linking group, Q is a divalent hydrocarbon group, and M is a cation.
Claim 2
Dependent Claim
151 words
An autodepositing composition comprising an acidic aqueous solution of activator consisting essentially of hydrofluoric acid in an amount sufficient to impart to the composition a pH within the range of about 1.6 to about 5.0 and a soluble ferric iron-containing compound in an amount equivalent to about 0.025 to about 3.5 g/l of ferric iron and having dispersed therein resin solids of an internally stabilized copolymer comprising: (A) at least about 80 wt. % of vinylidene chloride; (B) one or more monomers selected from the group consisting of methacrylic acid, acrylic acid, methyl methacrylate, methyl acrylate, ethyl acrylate, butyl acrylate, acrylonitrile, methacrylonitrile, vinyl chloride, acrylamide and methacrylamide; and (C) a water-soluble ionic material which includes an inorganic ionizable group and which has the formula: R--Z--Q--SO.sub.3 M.sup.+ wherein R is vinyl or alkyl substituted vinyl, Z is a difunctional linking group, Q is a divalent hydrocarbon group, and M is a cation.
Claim 3
Dependent Claim
13 words
A composition according to claim 1 wherein said water-soluble ionic material is sulfoethylmethacrylate.
Claim 4
Dependent Claim
24 words
A composition according to claim 1 wherein said monomer is selected from the group consisting of methacrylic acid, methyl methacrylate, acrylonitrile, and vinyl chloride.
Claim 5
Dependent Claim
28 words
A composition according to claim 1, wherein said soluble ferric iron-containing compound is present in an amount equivalent to about 0.3 to about 1.6 g/l of ferric iron.
Claim 6
Dependent Claim
18 words
A composition according to claim 4 wherein the source of the soluble ferric iron-containing compound is ferric fluoride.
Claim 7
Dependent Claim
19 words
A composition according to claim 1, comprising about 3 to about 10% by weight of said internally stabilized copolymer.
Claim 8
Dependent Claim
19 words
A composition according to claim 4 comprising about 3 to about 10% by weight of said internally stabilized copolymer.
Claim 9
Dependent Claim
19 words
A composition according to claim 5 comprising about 3 to about 10% by weight of said internally stabilized copolymer.
References Cited (Backward Citations)
US4243704A
Cited
EP0050235A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-03 | 1998-04-04 | 1998-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-03 | 2002-04-04 | 2002-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-03 | 2006-04-04 | 2006-10-04 | $7700.00 | Window Closed / Lapsed |