US4619706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for stripping organic coatings from substrates
Assignee: TEXO ACQUISITION Co
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Filing: 1985-09-24
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Granted: 1986-10-28
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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 08:51
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)
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US3094469A
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US3085918A
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US3615827A
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US3766076A
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US3796602A
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US3888693A
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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) | 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 |