Defoaming agent and/or deaerating agent based on oil-in-water dispersions
AssigneeBASF SE
InventorsRainer Dyllick-Brenzinger, Markus Kamieth, Johann Bonn, Manfred Matz, Klaus Lorenz
Life of this patent
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Abstract
The present invention relates to novel oil-in-water dispersions which comprise a) at least one water-insoluble oxygen-containing organic substance which is solid at room temperature and b) at least one amide compound of the formula I, 1 in which the variables R, R1, R2, A, B, X and Z have the meanings given in the description and the claims, and to the use thereof as antifoams and/or deaerators in aqueous systems which have a tendency toward foam formation.
Claims26
An oil-in-water dispersion, the oil phase of which comprises the following components:
- a) at least one water-insoluble oxygen-containing organic substance which is solid at room temperature, chosen from long-chain alcohols with an aliphatic hydrocarbon radical having at least 12 carbon atoms and which may be interrupted by S, SO or SO2, distillation residues which form during the preparation of aliphatic alcohols with at least 14 carbon atoms, mono-, di- and triglycerides of fatty acids, fatty acid esters of aliphatic alcohols with at least 12 carbon atoms, fatty acid esters of C1-C11-alkanols and mixtures thereof;
- b) at least one reaction product of at least one amide compound of the formula I and/or of an amidine compounds of the formula Ia,
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- in which the variables R, R1, R2, A, B, X and Z have the following meanings:
- R is an aliphatic radical with at least 14 carbon atoms, which may optionally have 1 or 2 hydroxyl groups, 1 or 2 double bonds and/or 1 or 2 triple bonds,
- A, B, independently of one another, are C2-C20-alkylene which may optionally have 1 or 2 OH groups, 1 or 2 double and/or triple bonds and/or be interrupted by one or two oxygen atoms which are nonadjacent to heteroatoms, or C5-C20-cycloalkylene which may optionally be substituted by 1 or 2 OH groups and/or by 1, 2, 3 or 4 methyl groups and/or can have a carbonyl function as ring member,
- R1 is hydrogen, C1-C13-alkyl, C5-C10-cycloalkyl, phenyl or a group of the formula [A1—X1]m—Z1,
- R2 is hydrogen, C1-C13-alkyl, C5-C10-cycloalkyl, phenyl, a group C(O)—R or a group of the formula [A2—X2]n—Z2,
- X is oxygen or a group N—R3, in which R3 has the following meanings:
- hydrogen, a group C(O)—R or a group of the formula [A3—X3]p—Z3,
- Z is hydrogen or a group [A4—X4]q—Z4,
- in which A1, A2, A3, A4, independently of one another, are C2-C3-alkylene, X1, X2, X3, X4, independently of one another, are oxygen or a group NRa, in which Ra, independently of the others, is hydrogen, CH2CH2NH2, CH2CH2NHC(O)R, CH2CH2CH2NH2, CH2CH2CH2NHC(O)R or a group C(O)—R, Z1, Z2, Z3, Z4, independently of one another, are hydrogen, CH2CH2NH2, CH2CH2NHC(O)R, CH2CH2CH2NH2 or CH2CH2CH2NHC(O)R, and m and q, independently of one another, are a number from 1 to 20, n and p, independently of one another, are a number from 1 to 10,
- where R1 with R2 or R2 with R3 and/or any two radicals R3, R4, Ra which are bonded to two nitrogen atoms bonded by an alkylene unit may also be C1-C4-alkylene which may have a carbonyl function and/or may be substituted by 1, 2 or 3 methyl groups,
- or the group B—X—Z is hydrogen if A is C6-C20-alkylene which is interrupted by one or two oxygen atoms which are nonadjacent to heteroatoms, or is C5-C20-cycloalkylene which may optionally be substituted by 1 or 2 OH groups and/or by 1, 2, 3 or 4 methyl groups and/or may have a carbonyl function as ring member,
- wherein the amide compound of the formula I and the amidine compound of the formula Ia have at least one reactive group RG chosen from alcoholic OH groups and aminic NH or NH2 groups,
- with at least one crosslinking compound V which has at least bifunctional reactivity toward the reactive groups,
- and/or a reaction product of an amino-containing polymer with an aliphatic carboxylic acid of the formula R—COOH in which R has the meaning given above,
- and optionally the following components:
- c) substances which are known to improve the antifoaming action of oil-in-water dispersions;
- d) one or more hydrocarbons with a boiling point above 200° C. (at atmospheric pressure).
A dispersion as claimed in either of the preceding claims, wherein the reaction products of I or Ia with the crosslinking compound have at least two radicals of the formula R—C(O)—, in which R has the meaning given above.
A dispersion as claimed in any of the preceding claims, wherein the variables A, B, R1, R2, X and Z in formula I have the following meanings:
- A, B, independently of one another, are C2-C4-alkylene,
- R1 is hydrogen or [A1—X1]m—H, in which A1 is C2-C3-alkylene and X1 is oxygen or a group NRa, in which Ra, independently of the others, is hydrogen or C(O)R, and m is a number from 1 to 10,
- R2 is hydrogen or [A2—X2]n—H, in which A2 is C2-C3-alkylene and X2 is oxygen or a group NRa, in which Ra, independently of the others, is hydrogen or C(O)R, and n is a number from 1 to 10, or
- R1 forms a C2-C4-alkylene group with R2, or R2 forms a C2-C4-alkylene group with R3,
- X is oxygen or a group N—R3, in which R3 has the following meanings:
- hydrogen or a group C(O)—R,
- Z is hydrogen or a group [A4—X4]q—Z4, in which A4 is C2-C3-alkylene and X4 is oxygen or a group NRa, in which Ra, independently of the others, is hydrogen or C(O)R and Z4 is hydrogen, and q is a number from 1 to 10.
A dispersion as claimed in any of the preceding claims, wherein component b) has an amine number below 3 (in accordance with DIN 16945).
A dispersion as claimed in any of the preceding claims, wherein component b) is obtainable by an at least 20% amidation of the NH and NH2 groups of an amine of the formula II
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- in which the variables R5, R6, A, B, X′ and Z′ have the following meanings:
- A, B, independently of one another, are C2-C20-alkylene which may optionally have 1 or 2 OH groups, 1 or 2 double and/or triple bonds and/or be interrupted by one or two oxygen atoms which are nonadjacent to heteroatoms, or C5-C20-cycloalkylene which may optionally be substituted by 1 or 2 OH groups and/or by 1, 2, 3 or 4 methyl groups and/or may have a carbonyl function as ring member,
- R5 is hydrogen, C1-C13-alkyl, C5-C10-cycloalkyl, phenyl or a group of the formula [A5—X5]r—H,
- R6 is hydrogen, C1-C13-alkyl, C5-C10-cycloalkyl, phenyl or a group of the formula [A6—X6]s—H,
- X′ is oxygen or a group N—R7, in which R7 has the following meanings:
- hydrogen, a group C(O)—R or a group of the formula [A7—X7]t—H,
- Z′ is hydrogen or a group [A8—X8]u—H,
- in which A5, A6, A7, A8, independently of one another, are C2-C3-alkylene, X5, X6, X7, X8, independently of one another, are oxygen or a group NRb in which Rb is hydrogen, CH2CH2NH2 or CH2CH2CH2NH2, and r and u, independently of one another, are a number from 0 to 21, s and t, independently of one another, are a number from 0 to 11,
- where R5 with R6 or R6 with R7 and/or any two radicals R7, R8, Rb which are bonded to two nitrogen atoms bonded via an alkylene unit may also be Cl-C4-alkylene which may have a carbonyl function and/or may be substituted by 1, 2 or 3 methyl groups,
- or the group Z′—X′—B is hydrogen if A is C6-C20-alkylene which is interrupted by one or two oxygen atoms which are nonadjacent to heteroatoms, or is C5-C20-cycloalkylene which may optionally be substituted by 1 or 2 OH groups and/or by 1, 2, 3 or 4 methyl groups and/or may have a carbonyl function as ring member,
- with a long-chain carboxylic acid of the formula R—COOH or an amide-forming derivative of this carboxylic acid in which R is an aliphatic radical with at least 14 carbon atoms, which may optionally have 1 or 2 hydroxyl groups, 1 or 2 double bonds and/or 1 or 2 triple bonds,
- and reaction of the reaction product obtained in the amidation with at least one crosslinking, at least bifunctional compound V.
A dispersion as claimed in any of the preceding claims, wherein component a) comprises, as main constituent, at least one long-chain alcohol with an aliphatic hydrocarbon radical having at least 12 carbon atoms.
A dispersion as claimed in any of the preceding claims, wherein the proportion by weight of component b), based on the total weight of the oil phase, is in the range from 1 to 20% by weight.
A dispersion as claimed in any of the preceding claims, wherein the aqueous phase comprises at least one surface-active substance.
Dependencies are inferred from the claim text.