EP0486113A2
Expired / Lapsed
EP
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Biodegradable fabric softeners derived from aspartic acid or glutaminic acid
Assignee: Akzo Nobel NV
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Filing: 1991-11-14
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Granted: —
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Expires: 2011-11-14
Abstract
Abstract Stable aqueous dispersions are described which display a fabric softening action and contain a biodegradable cationic nitrogen compound. The anion of the compound is the anion of a water-soluble organic Bronstedt acid. The acid is present in an amount more than equivalent to the amount of the nitrogen compound. The cationic nitrogen is obtained from an amine which is prepared from an unsaturated dicarboxylic ester e.g. ditallow maleate and an amine e.g. dimethyl amine.
Inventors
- 👤 Albert Frank
- 👤 Werner Güth
- 👤 Götz Krüger
- 👤 Hans Rörig
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 11:42
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/38; C11D1/62; C11D1/46; C11D3/00; C11D3/0005; C11D3/001; C11D3/0015; C11D3/16; C11D3/20; C11D3/2075; C11D3/2086
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
133 words
A stable aqueous dispersion of a cationic amino compound derived from an aliphatic aminodicarboxylic acid, characterised in that the cationic amino compound satisfies the following formula: wherein n equals 1 or 2, R¹ and R² may be the same or different and represent hydrogen, alkyl or alkenyl, and R³ and R⁴ may be the same or different and represent alkyl or alkenyl, such that at least 2 of the groups R¹ - R⁴ contain 8-24 carbon atoms and, in the case of neither R¹ nor R² representing hydrogen, at least one of the groups R¹ - R⁴ contains 1-4 carbon atoms, and wherein A⁻ is the anion of a water-soluble organic Bronstedt acid, with the proviso that the acid is present in an amount more than equivalent to the amount of nitrogen compound.
Claim 2
Dependent Claim
27 words
A stable aqueous dispersion according to claim 1, characterised in that the acid is present in it in at least twice the equivalent amount of amino compound.
Claim 3
Dependent Claim
159 words
A stable aqueous dispersion comprising a cationic amino compound derived from an aliphatic aminodicarboxylic acid, characterised in that the cationic amino compound satisfies the following formula: wherein n equals 1 or 2, R¹ and R² may be the same or different and represent hydrogen, alkyl or alkenyl, and R³ and R⁴ may be the same or different and represent alkyl or alkenyl, such that at least 2 of the groups R¹ - R⁴ contain 8-24 carbon atoms and, in the case of neither R¹ nor R² representing hydrogen, at least one of the groups R¹ - R⁴ contains 1-4 carbon atoms, and wherein A⁻ is the anion of a water-soluble organic Bronstedt acid, with the proviso that the acid is added in such an amount that a dispersion diluted with mains water which contains 0,5-30 wt.% of amino compound will have a pH below the value corresponding to the molar equivalence point of the amino compound and the acid.
Claim 4
Dependent Claim
144 words
A stable aqueous dispersion comprising a cationic amino compound derived from an aliphatic aminodicarboxylic acid, characterised in that the cationic amino compound satisfies the following formula: wherein n equals 1 or 2, R¹ and R² may be the same or different and represent hydrogen, alkyl or alkenyl, and R³ and R⁴ may be the same or different and represent alkyl or alkenyl, such that at least 2 of the groups R¹ - R⁴ contain 8-24 carbon atoms and, in the case of neither R¹ nor R² representing hydrogen, at least one of the groups R¹ - R⁴ contains 1-4 carbon atoms, and wherein A⁻ is the anion of a water-soluble organic Bronstedt acid, with the proviso that the amino compound and the carboxylic acid are present in such an amount that the dispersion in the concentrated form has a pH of less than 5.
Claim 5
Dependent Claim
19 words
A stable aqueous dispersion according to claim 4, characterised in that the pH is in the range of 1,5-3.
Claim 6
Dependent Claim
24 words
A stable aqueous dispersion according to any one of the preceding claims, characterised in that the cationic amino compound is dimethyl dihydrogenated tallow aspartate.
Claim 7
Dependent Claim
22 words
A stable aqueous dispersion according to any one of the preceding claims, characterised in that the organic acid is a hydroxycarboxylic acid.
Claim 8
Dependent Claim
24 words
A stable aqueous dispersion according to claim 6, characterised in that the hydroxycarboxylic acid is citric acid, malic acid, lactic acid or glycolic acid.
Claim 9
Dependent Claim
15 words
A fabric softener comprising an aqueous dispersion according to any one of the preceding claims.
Claim 10
Dependent Claim
72 words
A fabric softener comprising a quaternary ammonium compound satisfying the following formula: wherein n equals 1 or 2, R⁵ - R⁸ may be the same or different and represent alkyl or alkenyl, such that at least two of these groups contain 8-24 carbon atoms and at least one of these groups contains 1-4 carbon atoms, Q is an alkyl or hydroxy alkyl group containing 1-6 carbon atoms, and X⁻ is an anion.
Claim 11
Dependent Claim
58 words
Use of a compound satisfying the formula: wherein n equals 1 or 2, R⁹ and R¹⁰ may be the same or different and represent an alkyl or alkenyl group having 1-4 carbon atoms, and R¹¹ and R¹² may be the same or different and represent an alkyl or alkenyl group having 8-24 carbon atoms, in fabric softening compositions.
References Cited (Backward Citations)
No citation records indexed.
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