US4417035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emulsifiable hard waxes consisting of copolymers of ethylene with unsaturated carboxylic acids
Assignee: BASF SE
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Filing: 1981-11-13
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Granted: 1983-11-22
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Expires: 2001-11-13
Abstract
Abstract Water-emulsifiable hard waxes consisting of homogeneous copolymers of ethylene with from 1 to 8% by weight, based on copolymer, of one or more α-olefinically unsaturated C 3 -C 8 -carboxylic acids, and having the following characteristic data: Melt index=1,500 to 20 MFI units, measured at 160° C. under 325 g load Acid number=10-60 Hoppler hardness=400-800 bar, measured at 23° C. by DGF standard method M-III 9a (57).
Inventors
- 👤 Dieter Oeder
- 👤 Wolfram Dietsche
- 👤 Stefan Weiss
- 👤 Walter Ziegler
- 👤 Peter Kueppers
- 👤 Albert Hettche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:36
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/02; C09; C09G; C09G1/00; C09G1/06; C09G1/08; C09G1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
A water-emulsified hard wax comprising a homogeneous copolymer of ethylene with about 2.5 to 5% by weight, based on copolymer, of acrylic acid or methacrylic acid and having the following characteristics: Melt index=1,500 to 20 MPI units, measured at 160° C. under 325 g load Acid number=20-35 Hoppler hardness=450-650 bar, measured at 23° C. by DGF standard method M-III 9a (57), prepared by continuous copolymerization of ethylene with acrylic or methacrylic acid in the presence of a free radical initiator at about 150° to 300° C. under a pressure of from 1,000 to 3,000 bar, using a weight ratio of ethylene to acid of about 500:1 to 20:1, in a single-phase polymerization medium in which ethylene is present in supercritical state and acts as a solvent and in the presence of about 0.01 to 5% by weight, based on total monomers, of a regulator selected from the group consisting of an aliphatic aldehyde of 3-6 carbon atoms and an aliphatic ketone of 3-6 carbon atoms, thereby converting from about 3 to 25% by weight of ethylene and continuously removing the copolymer formed therefrom.
Claim 2
Dependent Claim
183 words
A water-emulsified hard wax comprising a homogeneous copolymer of ethylene with about 2.5 to 5% by weight, based on copolymer, of acrylic acid or methacrylic acid and having the following characteristics: Melt index=1,500 to 20 MPI units, measured at 160° C. under 325 g load Acid number=20-35 Hoppler hardness=450-650 bar, measured at 23° C. by DGF standard method M-III 9a (57), prepared by continuous copolymerization of ethylene with acrylic or methacrylic acid in the presence of a free radical initiator at about 150° to 300° C. under a pressure of from 1,000 to 3,000 bar, using a weight ratio of ethylene to acid of about 500:1 to 20:1, in a single-phase polymerization medium in which ethylene is present in supercritical state and acts as a solvent and in the presence of about 0.01 to 5% by weight, based on total monomers, of a regulator selected from the group consisting of an aliphatic aldehyde of 3-6 carbon atoms and an aliphatic ketone of 3-6 carbon atoms, thereby converting from about 3 to 25% by weight of ethylene and continuously removing the copolymer formed therefrom.
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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) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |