Low-viscosity opacifiers without anionic surface-active agents
View Patent ↗An emulsifier mixture for use in a wax-based opacifier composition is comprised of: (a) an alkyl and/or alkenyl oligoglycoside; (b) a fatty acid partial glyceride and optionally (c) at least one amphoteric surfactant, with the proviso that the ratio by weight of (a) and optionally (c) to (b) is between 6:1 and 3:1 and wherein the composition is free from anionic surfactants.
1. An emulsifier mixture for a wax-based opacifier comprising:
(a) an alkyl and/or alkenyl oligoglycoside;
(b) a fatty acid partial glyceride; and
(c) at least one betaine compound of formula (IV)
wherein R 8 CO is an aliphatic acyl group having from 6 to 22 carbon atoms and 0 or 1 to 3 double bonds, m is a number from 1 to 3, R 6 is hydrogen or an alkyl group having from 1 to 4 carbon atoms, R 7 is an alkyl group having from 1 to 4 carbon atoms, n is a number from 1 to 6 and X is an alkali metal, alkaline earth metal or ammonium ion,
with the proviso that the ratio by weight of (a) plus (c) to (b) is between 6:1 and 1.5:1 and wherein the composition is free from anionic surfactants.
2. The emulsifier mixture of claim 1 wherein the alkyl and/or alkenyl oligoglycoside is a compound of the formula (I):
R 1 O-[G] p (I)
wherein R 1 is an alkyl and/or alkenyl group having from 4 to 22 carbon atoms, G is a sugar unit having from 5 or 6 carbon atoms and p is a number from 1 to 10.
3. The emulsifier mixture of claim 1 wherein the fatty acid partial glyceride is a compound of the formula (II):
wherein R 2 CO is a linear or branched, saturated and/or unsaturated acyl group having from 6 to 22 carbon atoms, each of R 3 and R 4 is independently the same as R 2 CO or OH, and wherein the sum (m+n+p) is 0 or a number from 1 to 100, with the proviso that at least one of R 3 and R 4 is OH.
4. The emulsifier mixture of claim 1 wherein the weight ratio of (a) plus (c) to (b) is from 2:1 to 3:1.
5. An opacifier composition comprising: (1) a wax;
(2) an emulsifier mixture comprising:
(a) an alkyl and/or alkenyl oligoglycoside;
(b) a fatty acid partial glyceride; and
(c) at least one betaine compound of formula (IV)
wherein R 8 CO is an aliphatic acyl group having from 6 to 22 carbon atoms and 0 or 1 to 3 double bonds, m is a number from 1 to 3, R 6 is hydrogen or an alkyl group having from 1 to 4 carbon atoms, R 7 is an alkyl group having from 1 to 4 carbon atoms, n is a number from 1 to 6 and X is an alkali metak alkaline earth metal or ammonium ion,
with the proviso that the ratio by weight of (a) plus (c) to (b) is between 6:1 and 1.5:1, and wherein the composition is free from anionic surfactants.
6. The composition of claim 5 wherein the alkyl and/or alkenyl oligoglycoside is a compound of the formula (I):
R 1 O-[g] p (I)
wherein R 1 is an alkyl and/or alkenyl group having from 4 to 22 carbon atoms, G is a sugar unit having from 5 or 6 carbon atoms and p is a number from 1 to 10.
7. The composition of claim 5 wherein the fatty acid partial glyceride is a compound of the formula (II):
wherein R 2 CO is a linear or branched, saturated and/or unsaturated acyl group having from 6 to 22 carbon atoms, each of R 3 and R 4 is OH or independently the same as R 2 CO wherein the sum (m+n+p) is 0 or a number from 1 to 100, with the proviso that at least one of R 3 and R 4 is OH.
8. The composition of claim 5 wherein the weight ratio of (a) plus (c) to (b) is from 2:1 to 3:1.
9. The composition of claim 5 wherein the solids content is from 25 to 45% by weight, based on the final composition.
10. The composition of claim 5 wherein at least 90% of the composition has particle sizes below 10 μm.