Surfactant mixtures
AssigneeMerck Patent GmbH
InventorsJoerg Pahnke, Gerhard Jonschker, Steffen Schellenberger, Mathias Kaiser
Life of this patent
Estimating the term…
Abstract
The present invention relates to novel surfactant mixtures comprising at least one compound A whose dynamic surface tension γdyn. at a use concentration of 0.1% by weight and a bubble lifetime of 100 ms is <45 mN/m, and at least one compound B whose static surface tension ystat measured at a use concentration of 0.1% by weight is less than or equal to the static surface tension Ystat of compound A, to the use thereof as additives, for example in preparations for surface coating, such as paints, lacquers, protective coatings and special coatings in electronic or in optical applications. At least one compound in the novel surfactant mixture is a fluorosurfactant.
Claims14
A surfactant mixture comprising at least one compound A whose dynamic surface tension γdyn. measured according to the bubble pressure method at 20° C.±0.2° C. at a use concentration of 0.1% by weight and a bubble lifetime of 100 ms is ≤35 mN/m, and at least one compound B whose static surface tension γstat. is ≤the static surface tension γstat. of compound A, wherein at least one of the compounds A and at least one of the compounds B is a fluorosurfactant
- wherein the static surface tension γstat. is measured by the Wilhelmy plate method at 20° C.±0.2° C. at a use concentration of 0.1% by weight,
- wherein the static surface tension γstat. of the surfactant mixture is lower than the static surface tensions γstat. of the individual surfactants,
- wherein the compound B has static surface tension γstat. of ≤20 mN/m,
- wherein said mixture comprises the compounds A and B in a weight ratio A/B of 10:90 to 90:10,
- wherein said mixture comprises as compound A and/or compound B at least one compound of the formula (I)
- where
- X is a hydrophilic group,
- R is linear or branched alkylene, where one or more non-adjacent C atoms may be replaced by O, S and/or N,
- r is 0 or 1,
- B is a single bond, O, NH, NR′, CH2, C(O)—O, S, CH2—O, O—C(O), O—C(O)—O, SiR′2—O, O—SO2 or SO2—O, where R′ is linear or branched alkyl,
- R1 and R2 are, independently of one another, hydrogen or —CH2—COY3-L3-(A3)n3,
- Y1, Y2 and Y3 are, independently of one another, O, S or N,
- L1, L2 and L3 are, independently of one another, linear or branched alkylene,
- where one or more non-adjacent C atoms may be replaced by O, S and/or N,
- A1, A2 and A3 are, independently of one another, hydrogen or a group of the structure —Zi(CR3R4)miRfi, where i is 1, 2 or 3,
- Zi is 0, S or N and is bonded to a C atom of Li or is a single bond,
- R3 and R4 are, independently of one another, hydrogen or an alkyl group,
- Rfi is a fluorine-containing radical,
- n1, n2 and n3 are, independently of one another, 1-6,
- m1, m2 and m3 are, independently of one another, 0-5,
- and the compounds of formula (I) contain at least one Rfi group
- and
- wherein said mixture comprises at least one compound of the formula (II)
- (RF-(spacer)m)nM (II)
- where
- the RF-(spacer)m group is equal to Cn′F2n′+1—, Cn′F2n′+1—CH2CH2—, Cn′F2n′+1—OCF2CF2—, Cn′F2n′+1—OC6H4—, Cn′F2n′+1—C(O)NH(CH2)3N═, Cn′F2n′+1—SO2NH(CH2)3N═, CF3CCl2(CF2CFCl)n′+1—CF2— or C8F17CH2CH2Si(CH3)2—, where n′=4-12, and
- M is equal to —OPOO−, —COO−, —SO3−, —OSO3−, —OP(O)(O−)O— or —OP(O)O22−
- n is ≥1,
- and
- wherein said at least one compound of the Formula (II) is at least one compound A or at least one compound B.
A compound of formula (IV-1)
- wherein * defines the point of attachment.
Dependencies are inferred from the claim text.