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US4717424A
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Metal pigments stabilized with carboxy-alkylene phosphoric acid ester or carboxy-alkylene phosphonic or phosphinic acid
Assignee: Allnex Austria GmbH
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Filing: 1986-06-20
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Granted: 1988-01-05
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Expires: 2006-06-20
Abstract
Abstract The invention is concerned with stabilized metal pigments, in particular aluminum pigments, particularly against water and moisture, with improved resistance characteristics in aqueous paints. The stabilization of the metal particles is carried out through treatment with carboxyalkylene phosphoric acid esters, and/or carboxyalkylene phosphonic acids, and/or carboxyalkylene phosphinic acids. The carboxylic group of the compounds can be at least partially neutralized if desired.
Inventors
- 👤 Werner Wilfinger
- 👤 Maximilian Friedl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:43
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/62; C09C1/64; C09C1/644; C09C3/00; C09C3/08; C09D; C09D5/00; C09D5/38; C01; C01P; C01P2004/00; C01P2004/20; C01P2004/60; C01P2004/61
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
69 words
Metal pigments stabilized against water and moisture, said pigments having their surfaces treated with a carboxy alkylene phosphoric acid ester of formula (I) ##STR5## or a carboxy alkylene phosphonic acid or carboxy alkylene phosphinic acid of formula (II) ##STR6## wherein R is a substitutes or insubstituted straight chain or branched chain alkylene radical with 2 to 17 C-atoms and R l is a hydroxy group or a hydrogen atom.
Claim 2
Dependent Claim
69 words
Metal pigments stabilized against water and moisture, said pigments having their surfaces treated with a carboxy alkylene phosphoric acid ester of formula (I) ##STR5## or a carboxy alkylene phosphonic acid or carboxy alkylene phosphinic acid of formula (II) ##STR6## wherein R is a substitutes or insubstituted straight chain or branched chain alkylene radical with 2 to 17 C-atoms and R l is a hydroxy group or a hydrogen atom.
Claim 3
Dependent Claim
15 words
The metal pigments of claim 1 wherein the carboxy group is at least partially neutralized.
Claim 4
Dependent Claim
24 words
The metal pigments of claim 1 wherein the said pigments have their surfaces treated with a carboxy alkylene phosphoric acid ester of formula (I).
Claim 5
Dependent Claim
23 words
The metal pigments of claim 1 wherein the said pigments have their surfaces treated with a carboxy alkylene phosphonic acid of formula (II).
Claim 6
Dependent Claim
23 words
The metal pigments of claim 1 wherein the said pigments have their surfaces treated with a carboxy alkylene phosphinic acid of formula (II).
Claim 7
Dependent Claim
12 words
The metal pigments of claim 1 wherein R is substituted with halogen.
Claim 8
Dependent Claim
13 words
The metal pigments of claim 1 wherein the metal pigments are aluminum pigments.
Claim 9
Dependent Claim
24 words
The metal pigments of claim 7 wherein the said pigments have their surfaces treated with a carboxy alkylene phosphoric acid ester of formula (I).
Claim 10
Dependent Claim
30 words
The metal pigments of claim 8 wherein the phosphoric acid ester of formula (I) is a reaction product of gamma-, delta-, or epsilon-caprolactones with o-phosphoric acid, polyphosphoric acid, or phosphorpentoxide.
Claim 11
Dependent Claim
31 words
The metal pigments of claim 9 wherein in the phosphoric acid ester of formula (I) R is --CHOH(CH 2 ) 4 -- to provide the phosphoric acid ester of epsilon-hydroxycapronic acid.
Claim 12
Dependent Claim
71 words
Process for stabilizing metal pigments against water and moisture comprising treating the metal pigments with a carboxy alkylene phosphoric acid ester of formula (I) ##STR7## or a carboxy alkylene phosphonic acid or carboxy alkylene phosphinic acid of formula (II) ##STR8## wherein R is a substituted or unsubstituted straight chain or branched chain alkylene radical with from 2 to 17 C-atoms and R 1 is a hydroxy group or a hydrogen atom.
Claim 13
Dependent Claim
71 words
Process for stabilizing metal pigments against water and moisture comprising treating the metal pigments with a carboxy alkylene phosphoric acid ester of formula (I) ##STR7## or a carboxy alkylene phosphonic acid or carboxy alkylene phosphinic acid of formula (II) ##STR8## wherein R is a substituted or unsubstituted straight chain or branched chain alkylene radical with from 2 to 17 C-atoms and R 1 is a hydroxy group or a hydrogen atom.
Claim 14
Dependent Claim
14 words
The process of claim 11 wherein said carboxy group is at least partially neutralized.
Claim 15
Dependent Claim
20 words
The process of claim 11 wherein said treatment is carried out in the presence of an organic solvent or water.
Claim 16
Dependent Claim
24 words
The process of claim 13 wherein said treatment is carried out in the presence of an organic solvent or water and a wetting agent.
Claim 17
Dependent Claim
41 words
The process of claim 11 characterized in that a compound of formula (I) is used and the carboxy alkylene phosphoric acid ester of formula (I) is a reaction product of gamma-, delta-, or epsilon-caprolactones with o-phosphoric acid, polyphosphoric acid, or phosphorpentoxide.
Claim 18
Dependent Claim
16 words
The process of claim 15 wherein said reaction product is produced in the presence of water.
Claim 19
Dependent Claim
30 words
The process of claim 15 characterized in that in the compound of formula (I) R is --CHOH(CH 2 ) 4 -- to provide the phosphoric acid ester of epsilon-hydroxycapronic acid.
Claim 20
Dependent Claim
23 words
The process of claim 11 characterized in that about 0.1 to 10% by weight, calculated on metal pigment, of the stabilizer is used.
Claim 21
Dependent Claim
13 words
The process of claim 18 wherein the metal pigment is an aluminum pigment.
Claim 22
Dependent Claim
44 words
The process of claim 19 characterized in that the aluminum pigment, prior to the preparation of the paint, is mixed with the stabilizer for at least 30 minutes and afterwards is allowed to mature for at least 12 hours before use in the paint.
Claim 23
Dependent Claim
10 words
Aqueous paints comprising stabilized metal pigments according to claim 7.
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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) | 1991-01-04 | 1991-07-06 | 1992-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-04 | 1995-07-06 | 1996-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-04 | 1999-07-06 | 2000-01-05 | $7700.00 | Window Closed / Lapsed |