Patent US4619706A successfully refreshed from Google Patents.
US4619706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for stripping organic coatings from substrates
Assignee: TEXO ACQUISITION Co
•
Filing: 1985-09-24
•
Granted: 1986-10-28
•
Expires: 2005-09-24
Abstract
Abstract A di-phase stripping composition is disclosed wherein an aqueous phase having a non-aqueous solvent phase dispersed therein is employed to provide significantly improved effectiveness to remove a wide variety of organic coatings from substrates coated therewith. The aqueous phase preferably includes alkaline components and the organic solvent phase comprises a glycol phenol ether or ethoxylated furfuryl alcohol alone or in combination. Other additives can be used effectively to improve the stripping action such as surfactants, chelates and/or sequesterants and dispersants.
Inventors
- 👤 David G. Squires
- 👤 Lloyd Hundley
- 👤 Raymond A. Barry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:21
CPC Classifications
C; C09; C09D; C09D9/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
105 words
A method of stripping organic coatings from a coated substrate comprising the steps of subjecting said coated substrate to a two-phase liquid bath for a predetermined time, said bath comprising an organic solvent phase dispersed in an aqueous phase, said phases being relatively insoluble in one another; and agitating said liquid bath to maintain a relatively uniform state of dispersion of said organic phase in said aqueous phase and maintaining the two-phase relationship between said organic and aqueous phases in said dispersed state; said organic solvent phase comprising one or more components taken form a group consisting of glycol phenol ethers and ethoxylated furfuryl alcohol.
Claim 2
Independent Claim
105 words
A method of stripping organic coatings from a coated substrate comprising the steps of subjecting said coated substrate to a two-phase liquid bath for a predetermined time, said bath comprising an organic solvent phase dispersed in an aqueous phase, said phases being relatively insoluble in one another; and agitating said liquid bath to maintain a relatively uniform state of dispersion of said organic phase in said aqueous phase and maintaining the two-phase relationship between said organic and aqueous phases in said dispersed state; said organic solvent phase comprising one or more components taken form a group consisting of glycol phenol ethers and ethoxylated furfuryl alcohol.
Claim 3
Dependent Claim
23 words
The method defined in claim 1 wherein agitation of said bath is effected by heating said 2-phase liquid formulation to a rolling boil.
Claim 4
Dependent Claim
22 words
The method defined in claim 1 wherein agitation of said bath is effected by introduction of air or other mechanical mixing means.
Claim 5
Dependent Claim
16 words
The method defined in claim 1 wherein said aqueous phase includes one or more alkaline constituents.
Claim 6
Dependent Claim
26 words
The method defined in claim 4 wherein said organic phase comprises at least 5 to 40 percent by weight of the total combination of both phases.
Claim 7
Dependent Claim
30 words
The method defined in claim 4 wherein the said separate organic phase comprises 5 to 20 percent by weight of the total weight of both the organic and aqueous phases.
References Cited (Backward Citations)
US2389488A
Cited
US2653883A
Cited
US3094469A
Cited
US3085918A
Cited
US3615827A
Cited
US3766076A
Cited
US3796602A
Cited
US3888693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-27 | 1990-04-28 | 1990-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-27 | 1994-04-28 | 1994-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-27 | 1998-04-28 | 1998-10-28 | $7700.00 | Window Closed / Lapsed |