US4378998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of oxidation products of ethylene copolymers, and their use
Assignee: Hoechst AG
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Filing: 1980-10-29
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Granted: 1983-04-05
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Expires: 2000-10-29
Abstract
Abstract Low-melting, easily processable and at the same time hard polar waxes are obtained by treating copolymers, which are composed of ethylene and 0.5 to 50% by weight of a monomer containing oxygen-containing groups and have melt indices (MFI 190/2) of between 0.01 and 400 g/10 minutes, in the molten state, dispersed in a dispersing agent which is inert towards oxygen, with oxygen or oxygen-containing gases. Preferably, ethylene/vinyl acetate copolymers are oxidized, and these oxidation products are particularly suitable as the wax component in water-based and/or organic solvent-based polishes and in pastes.
Inventors
- 👤 Helmut Korbanka
- 👤 Karl-Heinz Stetter
- 👤 Gunther Illmann
- 👤 Rolf Jacob
- 👤 Otto Malitschek
- 👤 Josef Strehle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:21
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/06; C08F2800/00; C08F2800/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
112 words
A hard, easily processable polar wax with a dropping point above 80° C. and below 110° C., a needle penetration index below 10·10 -1 mm and an acid number of up to 200, obtained by oxidation of an ethylene/vinylacetate copolymer having a melt index between 0.01 and 400 g/10 minutes and a vinylacetate content of from about 1 to about 30% by weight, with oxygen or oxygen-containing gases, in the molten state and dispersed in a dispersing agent being inert towards oxygen, at a temperature between the melting point of the copolymer and 100° C. above the melting point, an excess pressure between 0 and 100 bars and with continuous intensive mixing.
Claim 2
Dependent Claim
112 words
A hard, easily processable polar wax with a dropping point above 80° C. and below 110° C., a needle penetration index below 10·10 -1 mm and an acid number of up to 200, obtained by oxidation of an ethylene/vinylacetate copolymer having a melt index between 0.01 and 400 g/10 minutes and a vinylacetate content of from about 1 to about 30% by weight, with oxygen or oxygen-containing gases, in the molten state and dispersed in a dispersing agent being inert towards oxygen, at a temperature between the melting point of the copolymer and 100° C. above the melting point, an excess pressure between 0 and 100 bars and with continuous intensive mixing.
Claim 3
Dependent Claim
32 words
A wax as claimed in claim 1, wherein the ethylene/vinylacetate copolymer has a vinyl acetate content of 2.5 to 28% by weight and a melt index of 0.1 to 200 g/10 minutes.
Claim 4
Dependent Claim
13 words
A wax as claimed in claim 1, wherein the dispersing agent comprises water.
Claim 5
Dependent Claim
136 words
A wax-containing polish in the form of water-based and/or organic solvent-based dispersion or in the form of a paste, which polish has wax content of 0.01 to 50% by weight and contains the other constituents customary in polishes of these types, and which, after drying, results in durable and particularly non-slip films, wherein the wax component is a hard, easily processable polar wax according to claim 10 having an acid number of from 10 to 50 and a melt viscosity at 120° C. of from 500 to 20,000 mPas, which has been obtained from an ethylene/vinylacetate copolymer with a vinyl acetate content of 1 to 30% by weight and a melt index of from 0.1 to 200 g/10 minutes, determined in accordance with DIN 53,735 at 190° C. with a load of 2.16 kp (MFI 190/2).
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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) | 1986-04-04 | 1986-10-04 | 1987-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-04 | 1990-10-04 | 1991-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-04 | 1994-10-04 | 1995-04-05 | $7700.00 | Window Closed / Lapsed |