US4693909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous wax dispersions as preservatives for metal surfaces and surfaces of coatings, their use and a process for preserving metal surfaces and surfaces of coatings
Assignee: BASF SE
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Filing: 1986-03-24
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Granted: 1987-09-15
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Expires: 2006-03-24
Abstract
Abstract A liquid preservative for plated or unplated metal surfaces and surfaces of coatings, in the form of an aqueous wax dispersion which contains a special ethylene/acrylic acid copolymer wax, consisting of from 8 to 25% by weight of acrylic acid units and from 92 to 75% by weight of ethylene units, in partially or completely neutralized form, if appropriate as a mixture with waxes based on polyethylene oxidation products and/or hydrocarbon waxes, the use of this special ethylene/acrylic acid copolymer wax for preserving plated or unplated metal surfaces and surfaces of coatings, and a process for temporarily preserving metal surfaces and surfaces of coatings.
Inventors
- 👤 Walter Ziegler
- 👤 Wolfram Dietsche
- 👤 Stefan Weiss
- 👤 Richard Mueller
- 👤 Albert Hettche
- 👤 Klaus Glaser
- 👤 Christos Vamvakaris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:25
CPC Classifications
C; C09; C09D; C09D191/00; C09D191/06; C09D123/00; C09D123/02; C09D123/04; C09D123/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
142 words
A liquid preservative for metal surfaces and surfaces of coatings, in the form of an aqueous wax dispersion, wherein the said dispersion contains from 10 to 30% by weight of an ethylene/acrylic acid copolymer wax, consisting of from 8 to 25% by weight of acrylic acid units and from 92 to 75% by weight of ethylene units, the percentages being based on the acid form of the wax, and water to make up to 100% by weight, the ethylene/acrylic acid copolymer wax in the acid form having a melt viscosity of not less than 1000 mm2/s, measured at 120° C., as a lower limit and an MFI of not less than 1, measured at 125° C. and 325 g, as an upper limit, and from 50 to 100 mol % of the carboxyl groups of the ethylene/acrylic acid copolymer wax are neutralized.
Claim 2
Dependent Claim
142 words
A liquid preservative for metal surfaces and surfaces of coatings, in the form of an aqueous wax dispersion, wherein the said dispersion contains from 10 to 30% by weight of an ethylene/acrylic acid copolymer wax, consisting of from 8 to 25% by weight of acrylic acid units and from 92 to 75% by weight of ethylene units, the percentages being based on the acid form of the wax, and water to make up to 100% by weight, the ethylene/acrylic acid copolymer wax in the acid form having a melt viscosity of not less than 1000 mm2/s, measured at 120° C., as a lower limit and an MFI of not less than 1, measured at 125° C. and 325 g, as an upper limit, and from 50 to 100 mol % of the carboxyl groups of the ethylene/acrylic acid copolymer wax are neutralized.
Claim 3
Dependent Claim
34 words
A liquid preservative as claimed in claim 1, wherein the ethylene/acrylic acid copolymer wax consists of from 12 to 22% by weight of acrylic acid and from 88 to 78% by weight of ethylene.
Claim 4
Dependent Claim
21 words
A liquid preservative as claimed in claim 1, wherein from 65 to 100 mol % of the carboxyl groups are neutralized.
Claim 5
Dependent Claim
39 words
A liquid preservative as claimed in claim 1, wherein the ethylene/acrylic acid copolymer wax has a melt viscosity of 2000 mm 2 /s as a lower limit and an MFI of not less than 10 as an upper limit.
Claim 6
Dependent Claim
117 words
A liquid preservative as claimed in claim 1, wherein the aqueous wax dispersion contains from 15 to 25% by weight of an emulsion of a wax based on a polyethylene oxidation product, consisting of from 20 to 27% by weight of a wax based on a polyethylene oxidation product and having an acid number of from 18 to 25 and a molecular weight of from 2000 to 10000, from 0.5 to 0.8% by weight of an alkali metal hydroxide and water to make up to 100% by weight, the percentages being based on the weight of the said dispersion, with the proviso that the total dispersion has a solids content of from 10 to 35% by weight.
Claim 7
Dependent Claim
83 words
A liquid preservative as claimed in claim 1, wherein the aqueous wax dispersion contains from 40 to 80% by weight, based on the total weight of the said dispersion, of a polyethylene wax having a molecular weight of from 500 to 6000 and a melting point of from 40° to 110° C., or a paraffin having a melting point of from 40° to 100° C., with the proviso that the total dispersion has a solids content of from 30 to 65% by weight.
Claim 8
Dependent Claim
140 words
A liquid preservative as claimed in claim 1, wherein the aqueous wax dispersion contains from 25 to 100% by weight of an emulsion of a wax based on a polyethylene oxidation product, consisting of from 20 to 27% by weight of a wax based on a polyethylene oxidation product having an acid number of from 18 to 25 and a molecular weight of from 2000 to 10000, from 0.5 to 0.8% by weight of an alkali metal hydroxide, from 2.5 to 2.8% by weight of a nonionic emulsifier and water to make up to 100% by weight, and from 15 to 200% by weight of a synthetic or natural hydrocarbon wax, with the proviso that the total dispersion has a solids content of from 30 to 65% by weight, the percentages being based on the weight of the said dispersion.
Claim 9
Dependent Claim
33 words
A process for temporarily preserving metal surfaces and surfaces of coatings, wherein an aqueous wax dispersion as claimed in claim 1 is applied onto the metal surfaces or surfaces of coatings and dried.
Claim 10
Dependent Claim
32 words
A process for preserving plated metal surfaces, wherein an aqueous wax dispersion as claimed in claim 1 is applied onto the plated metal surface and dried at from 30° to 60° C.
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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) | 1990-09-14 | 1991-03-16 | 1991-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-14 | 1995-03-16 | 1995-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-14 | 1999-03-16 | 1999-09-15 | $7700.00 | Window Closed / Lapsed |