US4315957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for protecting metal or lacquered surfaces
Assignee: Hoechst AG
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Filing: 1980-06-25
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Granted: 1982-02-16
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Expires: 2000-06-25
Abstract
Abstract The invention relates to a process for the temporary protection of metal and lacquered surfaces comprising applying thereto an aqueous emulsion containing a hydrocarbon wax or the oxidate thereof, optionally waxes based on montan wax and/or natural waxes, as well as a basic saponifying agent and emulsifiers. The wax films resulting from the emulsions are waterproof, however, they are easily removable--even after aging--without the use of a solvent being necessary, merely by a treatment with a water-steam mixture.
Inventors
- 👤 Alfred Hereth
- 👤 Klaus Rieger
- 👤 Josef Wildgruber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:24
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/008; C09D191/00; C09D191/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31714
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
290 words
A process for temporarily protecting a metal or lacquered surface with a wax coating which is easily removable by treatment with a water-steam mixture, said process comprising applying a liquid, aqueous wax-containing preservative onto said surface, said preservative consisting essentially of (a) from 4 to 20% by weight of an acid wax based on montan wax with a drop point of 80° to 90° C. and an acid number of from 100 to 150, or an ester wax based on montan wax with a drop point of 78° to 88° C., an acid number of from 20 to 50 and a saponification number of from 100 to 150 or of a mixture of said waxes, (b) from 0 to 12% by weight of a natural wax selected from the group consisting of carnauba wax, candelilla wax, ouricoury wax and Japan wax, (c) from 10 to 20% by weight of a hydrocarbon wax selected from the group consisting of cake paraffin with a softening point of from 50° to 56° C., synthetic paraffin with a softening point of from 102° to 104° C., high-molecular 1-olefin with a softening point of from 73° to 75° C., micro-crystalline wax with a softening point of from 60° to 70° C., polyolefin wax with a softening point of from 100° to 130° C. and polyolefin wax oxidate with a drop point of from 100° to 115° C. and an acid number of from 15 to 30, or a mixture of said waxes, (d) from 0.02 to 0.5% by weight of lithium or potassium hydroxide, (e) from 0.5 to 8% by weight of an alkane sulfonate as emulsifier, and (f) water in an amount so that the total of (a) through (f) is 100% by weight.
Claim 2
Dependent Claim
290 words
A process for temporarily protecting a metal or lacquered surface with a wax coating which is easily removable by treatment with a water-steam mixture, said process comprising applying a liquid, aqueous wax-containing preservative onto said surface, said preservative consisting essentially of (a) from 4 to 20% by weight of an acid wax based on montan wax with a drop point of 80° to 90° C. and an acid number of from 100 to 150, or an ester wax based on montan wax with a drop point of 78° to 88° C., an acid number of from 20 to 50 and a saponification number of from 100 to 150 or of a mixture of said waxes, (b) from 0 to 12% by weight of a natural wax selected from the group consisting of carnauba wax, candelilla wax, ouricoury wax and Japan wax, (c) from 10 to 20% by weight of a hydrocarbon wax selected from the group consisting of cake paraffin with a softening point of from 50° to 56° C., synthetic paraffin with a softening point of from 102° to 104° C., high-molecular 1-olefin with a softening point of from 73° to 75° C., micro-crystalline wax with a softening point of from 60° to 70° C., polyolefin wax with a softening point of from 100° to 130° C. and polyolefin wax oxidate with a drop point of from 100° to 115° C. and an acid number of from 15 to 30, or a mixture of said waxes, (d) from 0.02 to 0.5% by weight of lithium or potassium hydroxide, (e) from 0.5 to 8% by weight of an alkane sulfonate as emulsifier, and (f) water in an amount so that the total of (a) through (f) is 100% by weight.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-15 | 1985-08-17 | 1986-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-15 | 1989-08-17 | 1990-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-15 | 1993-08-17 | 1994-02-16 | $7700.00 | Window Closed / Lapsed |