US4169088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective coating and method of applying
Assignee: Ecologel Pty Ltd
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Filing: 1978-05-30
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Granted: 1979-09-25
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Expires: 1998-05-30
Abstract
Abstract The invention is directed towards an improved sealing solution and in particular anti-graffiti solutions. The solution is formed by combining a suitable polyvinyl alcohol with a solution or emulsion of acrylic resin to form a partially cross-linked shared polyvinyl alcohol/acrylic resin, catalyzed by exposure to heat and/or light. The properties of the solution are enhanced by the addition of a zinc complex solution containing zinc tetramine and/or an aldehyde donor such as formaldehyde or glyoxal.
Inventors
- 👤 Ronald P. Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:28
CPC Classifications
C; C09; C09D; C09D129/00; C09D129/02; C09D129/04; C08; C08K; C08K3/00; C08K3/28; C08K5/00; C08K5/16; C09D133/00; C09D133/04; C09D133/06; C09D133/10; C09D133/12; C08L; C08L29/00; C08L29/02; C08L29/04; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12; Y; Y10; Y10S; Y10S428/00; Y10S428/907; Y10S428/911
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
118 words
A sealing solution for application to surfaces to protect same from defacement and deterioration, said solution comprising a resin formed by combining: (1) polyvinyl alcohol resin having: (a) a molecular weight from 8000 to 115,000 and (b) a degree of hydrolysis of 84-98%, with (2) an acrylic resin having: (a) substantially pure methyl-methylacrylic base, and (b) a carboxylation degree of 1.5 to 10% the proportion of pva to acrylic being such that the number of hydroxyl groups available from the pva is 5-50% of the number of carboxyl groups present, and (3) a zinc tetramine complex such that the quantity of zinc ions in the solution is in the range of 20-50% of the mass of carboxyl groups.
Claim 2
Dependent Claim
118 words
A sealing solution for application to surfaces to protect same from defacement and deterioration, said solution comprising a resin formed by combining: (1) polyvinyl alcohol resin having: (a) a molecular weight from 8000 to 115,000 and (b) a degree of hydrolysis of 84-98%, with (2) an acrylic resin having: (a) substantially pure methyl-methylacrylic base, and (b) a carboxylation degree of 1.5 to 10% the proportion of pva to acrylic being such that the number of hydroxyl groups available from the pva is 5-50% of the number of carboxyl groups present, and (3) a zinc tetramine complex such that the quantity of zinc ions in the solution is in the range of 20-50% of the mass of carboxyl groups.
Claim 3
Dependent Claim
28 words
A sealing solution as claimed in claim 1 wherein the solution is prepared as a water solution or water emulsion having a viscosity of less than 500 cpa.
Claim 4
Dependent Claim
17 words
A sealing solution as claimed in claim 1 wherein an aldehyde donor is added to the solution.
Claim 5
Dependent Claim
27 words
A sealing solution as claimed in claim 1 wherein sufficient acid is added to ensure that on drying and evaporation of NH 3 the solution becomes acidic.
Claim 6
Dependent Claim
20 words
A sealing solution as claimed in claim 1 wherein the acrylic resin is greater than 55% of the total solids.
Claim 7
Dependent Claim
19 words
A sealing solution as claimed in claim 1 wherein total non-volatiles are less than 35% of the total solution.
Claim 8
Dependent Claim
15 words
A method of protecting surfaces by application of the solution as claimed in claim 9.
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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) | 1982-09-24 | 1983-03-26 | 1983-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-24 | 1987-03-26 | 1987-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-24 | 1991-03-26 | 1991-09-25 | $7700.00 | Window Closed / Lapsed |