US4749735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binders for aqueous, physically drying anticorrosion coatings based on a polymer dispersion containing a monoalkyl phosphate
Assignee: BASF SE
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Filing: 1986-06-20
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Granted: 1988-06-07
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Expires: 2006-06-20
Abstract
Abstract Aqueous anticorrosion coatings which contain a binder based on styrene/alkyl (meth)acrylate copolymer dispersions which contain (a) from 0.5 to 4% by weight of a monoalkyl phosphate having a phosphorus content of not less than 7% and (b) from 0.1 to 3.5% by weight of an oxyethylated alkylphenol, where alkyl is of 8 or 9 carbon atoms, and/or of an oxyethylated C 8 -C 18 -fatty alcohol, the percentages by weight being based on the amount of copolymer and the copolymers having a mean particle diameter of from 0.01 to 0.5 μm and an MFT of from 5° to 50° C., exhibit good adhesion, especially to iron and steel, and are particularly resistant to weathering.
Inventors
- 👤 Rolf Dersch
- 👤 Heribert Kossmann
- 👤 Eckehardt Wistuba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:38
CPC Classifications
C; C09; C09D; C09D125/00; C09D125/02; C09D125/04; C09D125/08; C09D125/14
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
158 words
A binder for aqueous anticorrosion paints based on a styrene/alkyl (meth)acrylate copolymer dispersion, where the copolymer in the said dispersion has a mean particle diameter of from 0.01 to 0.5 μm and a minimum film forming temperature of from 5° to 50° C., wherein the said dispersion is prepared by copolymerizing styrene and a (meth)acrylate of a C 4 -C 18 alkanol in an aqueous emulsion in the presence of: (a) from 0.5 to 4% by weight of a mono(C 5-24 )alkyl phosphate having a phosphorus content of not less than 7%; and (b) from 0.1 to 3.5% by weight of an oxyethylated (C 8-9 )alkylphenol, or from 0.1 to 3.5% by weight of an oxyethylated (C 8-18 ) fatty alcohol, wherein the percentages are based on the amount of copolymer, and said binder comprises a zinc ammonium salt soluble in water in an amount of from 0.5 to 10% by weight, based on the amount of copolymer.
Claim 2
Dependent Claim
158 words
A binder for aqueous anticorrosion paints based on a styrene/alkyl (meth)acrylate copolymer dispersion, where the copolymer in the said dispersion has a mean particle diameter of from 0.01 to 0.5 μm and a minimum film forming temperature of from 5° to 50° C., wherein the said dispersion is prepared by copolymerizing styrene and a (meth)acrylate of a C 4 -C 18 alkanol in an aqueous emulsion in the presence of: (a) from 0.5 to 4% by weight of a mono(C 5-24 )alkyl phosphate having a phosphorus content of not less than 7%; and (b) from 0.1 to 3.5% by weight of an oxyethylated (C 8-9 )alkylphenol, or from 0.1 to 3.5% by weight of an oxyethylated (C 8-18 ) fatty alcohol, wherein the percentages are based on the amount of copolymer, and said binder comprises a zinc ammonium salt soluble in water in an amount of from 0.5 to 10% by weight, based on the amount of copolymer.
Claim 3
Dependent Claim
21 words
The binder of claim 1, wherein the zinc ammonium salt is zinc ammonium carbonate, zinc ammonium polyacrylate, or a combination thereof.
Claim 4
Dependent Claim
29 words
The binder of claim 1, comprising a zinc ammonium salt soluble in water in an amount of from 1 to 5% by weight, based on the amount of copolymer.
Claim 5
Dependent Claim
26 words
The binder of claim 1, wherein the C 4 -C 18 alkanol comprises n-butanol, isobutanol, tert-butanol, 2-ethylhexyl alcohol, lauryl alcohol, cyclohexyl alcohol, norbornanol, or 4-tert-butyl cyclohexanol.
Claim 6
Dependent Claim
49 words
The binder of claim 1, wherein the said dispersion is prepared by copolymerizing styrene and a (meth)acrylate of a C 4 -C 18 alkanol in a total amount of styrene and (meth)acrylate of from 35 to 65% by weight, based on the total amount of monomers, dispersants, and water.
Claim 7
Dependent Claim
20 words
The binder of claim 1, wherein the said copolymer comprises acrylonitrile in an amount of up to 30% by weight.
Claim 8
Dependent Claim
22 words
The binder of claim 1, wherein the said copolymer is a copolymer based on styrene and either n-butyl acrylate or 2-ethylhexyl acrylate.
Claim 9
Dependent Claim
35 words
The binder of claim 1, wherein the said copolymer comprises, as copolymerized units, from 0.2 to 3% by weight of a mono-(C 3-5 )carboxylic acid, a di-(C 3-5 )-carboxylic acid, or one of their amides.
Claim 10
Dependent Claim
21 words
The binder of claim 8, wherein the said mono-(C 3-5 )carboxylic acid comprises acrylic acid, methacrylic acid, or a combination thereof.
Claim 11
Dependent Claim
23 words
The binder of claim 8, wherein the said di-(C 3-5 )-carboxylic acid comprises fumaric acid, itaconic acid, maleic acid, or a combination thereof.
Claim 12
Dependent Claim
16 words
The binder of claim 8, wherein the said amide comprises acrylamide, methacrylamide, or a combination thereof.
Claim 13
Dependent Claim
20 words
The binder of claim 1, wherein component (a) is used in an amount of from 0.8 to 1.8% by weight.
Claim 14
Dependent Claim
15 words
The binder of claim 1, comprising using for component (a), a mono(C 7-17 )alkyl phosphate.
Claim 15
Dependent Claim
36 words
The binder of claim 1, wherein the said mono(C 5-24 )alkyl phosphate comprises dodecyl phosphate, dodecyl ether phosphate containing 2 moles of ethylene oxide, dodecyl ether phosphate containing 3 moles of ethylene oxide, or octadecyl phosphate.
Claim 16
Dependent Claim
38 words
The binder of claim 1, wherein the said oxyethylated (C 8-9 )alkyl phenol or the said oxyethylated (C 8 -C 18 )-fatty alcohol possesses a degree of oxyethylation corresponding to 8 to 40 ethylene oxide radicals per molecule.
Claim 17
Dependent Claim
35 words
The binder of claim 1, wherein the said oxyethylated (C 8-9 )alkylphenol or the said oxyethylated (C 8-18 )-fatty alcohol possesses a degree of oxyethylation of from 20 to 30 ethylene oxide radicals per molecule.
Claim 18
Dependent Claim
21 words
The binder of claim 1, wherein from 0.3 to 1.5% by weight of component (b), based on the copolymers, is used.
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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) | 1991-06-07 | 1991-12-07 | 1992-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-07 | 1995-12-07 | 1996-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-07 | 1999-12-07 | 2000-06-07 | $7700.00 | Window Closed / Lapsed |