US4647480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of additive in aqueous cure of autodeposited coatings
Assignee: Henkel Corp
•
Filing: 1985-08-01
•
Granted: 1987-03-03
•
Expires: 2005-08-01
Abstract
Abstract Curing of autodeposited coatings by treatment with water or steam including a solute.
Inventors
- 👤 Bashir M. Ahmed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:13
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/08; C09D5/088; B; B05; B05D; B05D7/00; B05D7/14; B05D7/142; B05D7/144; C08; C08F; C08F214/00; C08F214/02; C08F214/04; C08F214/08; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T156/1092; Y10T156/1093
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
138 words
A process for curing an uncured autodeposited coating comprising contacting a metallic surface with an autodepositing composition having resin solids dispersed in the aqueous phase of said composition to form on said surface an uncured autodeposited coating in the form of resin solids adhered thereto and subjecting said uncured autodeposited coating to steam or to water having a temperatur of at least about 70° C. and having solute dissolved therein for a period of time sufficient to cure said coating, said solute being present in an amount sufficient to improve the adhesive properties of said cured coating and being a surfactant, a strong acid, a strong base, a weak acid, a weak base, a salt of such acid or base, a metal oxide, a transitional metal complex or a mixture of two or more of the foregoing compounds.
Claim 2
Dependent Claim
138 words
A process for curing an uncured autodeposited coating comprising contacting a metallic surface with an autodepositing composition having resin solids dispersed in the aqueous phase of said composition to form on said surface an uncured autodeposited coating in the form of resin solids adhered thereto and subjecting said uncured autodeposited coating to steam or to water having a temperatur of at least about 70° C. and having solute dissolved therein for a period of time sufficient to cure said coating, said solute being present in an amount sufficient to improve the adhesive properties of said cured coating and being a surfactant, a strong acid, a strong base, a weak acid, a weak base, a salt of such acid or base, a metal oxide, a transitional metal complex or a mixture of two or more of the foregoing compounds.
Claim 3
Dependent Claim
69 words
In a process wherein a water film is sandwiched between an overlying uncured autodeposited coating and an underlying coated metallic surface and in which said uncured coating is cured by contacting it with an aqueous curing medium for a sufficient period of time to cure said coating, the improvement comprising dissipating said water film in the presence of said aqueous curing medium and during the curing of said coating.
Claim 4
Dependent Claim
69 words
In a process wherein a water film is sandwiched between an overlying uncured autodeposited coating and an underlying coated metallic surface and in which said uncured coating is cured by contacting it with an aqueous curing medium for a sufficient period of time to cure said coating, the improvement comprising dissipating said water film in the presence of said aqueous curing medium and during the curing of said coating.
Claim 5
Dependent Claim
98 words
In a process wherein a water film is sandwiched beteen an overlying substrate and in which said uncured coating is cured by contacting it with an aqueous curing medium for a sufficient period of time to cure said coating, the improvement comprising dissipating said water film by contacting the coating with an aqueous solution of solute, said solute being a surfactant, a strong acid, a strong base, a weak acid, a weak base, a salt of such acid or base, a metal oxide, a transitional metal complex or a mixture of two or more of the foregoing compounds.
Claim 6
Dependent Claim
98 words
In a process wherein a water film is sandwiched beteen an overlying substrate and in which said uncured coating is cured by contacting it with an aqueous curing medium for a sufficient period of time to cure said coating, the improvement comprising dissipating said water film by contacting the coating with an aqueous solution of solute, said solute being a surfactant, a strong acid, a strong base, a weak acid, a weak base, a salt of such acid or base, a metal oxide, a transitional metal complex or a mixture of two or more of the foregoing compounds.
Claim 7
Dependent Claim
18 words
A process according to claim 1 wherein said coating is cured by immersing it in a water bath.
Claim 8
Dependent Claim
12 words
A process according to claim 4 wherein said solute is a surfactant.
Claim 9
Dependent Claim
15 words
A process according to claim 5 wherein said surfactant is an amphoteric or cationic surfactant.
Claim 10
Dependent Claim
13 words
A process according to claim 6 wherein said surfactant is an amphoteric surfactant.
Claim 11
Dependent Claim
13 words
A process according to claim 7 wherein said surfactant is a N-containing surfactant.
Claim 12
Dependent Claim
17 words
A process according to claim 1 wherein the pH of said water bath is less than 7.
Claim 13
Dependent Claim
22 words
A process according to claim 1 wherein said steam or said water includes about 0.1 to about 500 g/l of said solute.
Claim 14
Dependent Claim
22 words
A process according to claim 10 wherein said steam or said water includes about 1 to about 100 g/l of said solute.
Claim 15
Dependent Claim
28 words
A process according to claim 1 in which said water or steam includes also a material which improves or imparts other functional and/or aesthetic properties to said coating.
Claim 16
Dependent Claim
18 words
A process according to claim 12 wherein said material is an aqueous dispersion of solids or an emulsion.
Claim 17
Dependent Claim
12 words
A process according to claim 13 wherein said solids are resin solids.
Claim 18
Dependent Claim
21 words
A process according to claim 1 wherein said water or said steam has a pH of about 3 to about 11.
Claim 19
Dependent Claim
23 words
A process according to claim 1 wherein said solute is an alkali metal silicate, an alkali metal pyrophosphate, or an alkali metal chloride.
Claim 20
Dependent Claim
12 words
A process according to claim 1 wherein said solute is a polyamine.
Claim 21
Dependent Claim
20 words
A process according to claim 17 wherein said polyamine is the condensation product of polyethylene glycol and tallow fatty amine.
Claim 22
Dependent Claim
28 words
A process according to claim 1 wherein said autodepositing composition includes hydrofluoric acid and ferric fluoride as activating ingredients and wherein said metallic surface is a ferriferous surface.
Claim 23
Dependent Claim
91 words
A process according to claim 1 wherein said autodepositing composition consists essentially of hydrofluoric acid, ferric fluoride and dispersed in the aqueous phase of said composition internally stabilized, crystalline resin solids comprising at least about 80 wt. % of vinylidene chloride and having a Tg below room temperature, wherein said uncured autodeposited coating is formed on a ferriferous surface and wherein said surface is immersed in hot water containing a polyamine solute and having a temperature of 100° F. or more for a period of time sufficient to cure said coating.
References Cited (Backward Citations)
US3000757A
Cited
US3664888A
Cited
US3585084A
Cited
US3592699A
Cited
US3795546A
Cited
US4030945A
Cited
US4373050A
Cited
US3647567A
Cited
US3709743A
Cited
US3689292A
Cited
US4347172A
Cited
US4411937A
Cited
US4103049A
Cited
US3922451A
Cited
US4318944A
Cited
US4191676A
Cited
US4180603A
Cited
US4243704A
Cited
US4304799A
Cited
US4313861A
Cited
US4376807A
Cited
US4442143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |