Patent US4748049A successfully refreshed from Google Patents.
US4748049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clear paint booth coating composition and method
Assignee: PPG Industries Ohio Inc
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Filing: 1986-03-27
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Granted: 1988-05-31
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Expires: 2006-03-27
Abstract
Abstract A crystal clear paint spray booth barrier coating comprising an aqueous solution of polyvinyl alcohol is disclosed. The polyvinyl alcohol may include a foam depressor for spray application of said coating. Fluorocarbon and non-ionic surfactants are disclosed for providing a smooth coating surface and improving the transparency of said coating. A polyacrylate thickener may be included to facilitate applying the coating to vertical surfaces. Methylparaben is disclosed for preventing the formation of mold on said coating and improving shelf life of the coating. The method disclosed includes mixing an aqueous solution of polyvinyl alcohol, at least one surfactant and a foam depressor, applying said mixture to the surfaces of the paint spray booth to be protected and equipment located in the paint spray booth, and allowing the coating to dry to a crystal clear coating. Methods of removing the coating include peeling the coating off as a film and water washing the coating.
Inventors
- 👤 Harry R. Charles
- 👤 Cathy D. Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:30
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; B; B05; B05D; B05D1/00; B05D1/32; B05D1/322; C03; C03C; C03C17/00; C03C17/28; C03C17/32; C09; C09D; C09D129/00; C09D129/02; C09D129/04; C09D5/00; C09D5/20; C03C2218/00; C03C2218/30; C03C2218/355; C08J2329/00; C08J2329/02; C08J2329/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
85 words
An aqueous solution for forming crystal clear coating on paint booth surfaces and equipment located in paint spray booths, said coating being removable with water or peelable from a substrate as a film comprising the following constituents: from about 5 to 20% by weight of polyvinyl alcohol; from about 1 to 5% by weight of a foam depressor; from about 0.07 to 0.7% by weight of a wetting agent; and an amine neutralizer and corrosion inhibitor in an amount of up to 1% by weight.
Claim 2
Dependent Claim
85 words
An aqueous solution for forming crystal clear coating on paint booth surfaces and equipment located in paint spray booths, said coating being removable with water or peelable from a substrate as a film comprising the following constituents: from about 5 to 20% by weight of polyvinyl alcohol; from about 1 to 5% by weight of a foam depressor; from about 0.07 to 0.7% by weight of a wetting agent; and an amine neutralizer and corrosion inhibitor in an amount of up to 1% by weight.
Claim 3
Dependent Claim
15 words
The aqueous solution of claim 1, wherein said amine neutralizer and corrosion inhibitor comprise triethanolamine.
Claim 4
Dependent Claim
14 words
The aqueous solution of claim 1, and a preservative 0.1 to 2% by weight.
Claim 5
Dependent Claim
20 words
The aqueous solution of claim 1, wherein said wetting agent is a fluorocarbon surfactant of up to 0.5% by weight.
Claim 6
Dependent Claim
10 words
The aqueous solution of claim 4, and a non-ionic surfactant.
Claim 7
Dependent Claim
85 words
The aqueous solution for forming crystal clear coating on paint booth surfaces and equipment located in paint spray booths, said coating being removable with water or peelable from a substrate as a film comprising the following constituents: from about 5 to 10% by weight of polyvinyl alcohol; from about 1 to 2% by weight of a foam depressor; from about 0.07 to 0.3% by weight of a wetting agent; and an amine neutralizer and corrosion inhibitor in the amount of up to 1% by weight.
Claim 8
Dependent Claim
85 words
The aqueous solution for forming crystal clear coating on paint booth surfaces and equipment located in paint spray booths, said coating being removable with water or peelable from a substrate as a film comprising the following constituents: from about 5 to 10% by weight of polyvinyl alcohol; from about 1 to 2% by weight of a foam depressor; from about 0.07 to 0.3% by weight of a wetting agent; and an amine neutralizer and corrosion inhibitor in the amount of up to 1% by weight.
Claim 9
Dependent Claim
15 words
The aqueous solution of claim 6, wherein said amine neutralizer and corrosion inhibitor comprise triethanolamine.
Claim 10
Dependent Claim
21 words
The aqueous solution of claim 6, wherein said wetting agent is a fluorocarbon or surfactant of up to 0.5% by weight.
Claim 11
Dependent Claim
10 words
The aqueous solution of claim 8, and a non-ionic surfactant.
Claim 12
Dependent Claim
43 words
A method of providing a barrier coating on a paint spray booth and equipment located in a paint spray booth comprising applying to surfaces of the paint spray booth or the equipment located in said spray booth, the aqueous solution of claim 1.
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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) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |