Oil-in-water emulsion and use thereof

A film-forming oil-in-water emulsion, comprising:

• one or more amino polyorganosiloxanes (A1), one or more silicone resins (A2), a surfactant composition (B) and water;
• wherein at least 80 mol % of units of the amino polyorganosiloxanes (A1) are selected from those having the following general formulas Ia, Ib II and III:
• wherein a has the value 0 or 1;
• wherein b has the value 1 or 2;
• wherein a+b is equal to 2;
• wherein R1 represents monovalent hydrocarbon groups having 1-40 carbon atoms;
• wherein R2 represents aminoalkyl groups of the general formula IV:
• wherein R5 represents divalent hydrocarbon groups having 1-40 carbon atoms;
• wherein R6 represents divalent hydrocarbon groups having 1-40 carbon atoms, H, hydroxymethyl or alkanoyl;
• wherein R7 represents groups of the general formula V:
• wherein x is 0 or an arbitrary integer from 1 to 40;
• wherein R8 represents divalent groups of the general formula VI:
• wherein y an arbitrary integer from 1 to 6;
• wherein R9 represents H or hydrocarbon groups having 1-40 carbon atoms;
• wherein R3 represents optionally halogen-substituted hydrocarbon groups having 1-40 carbon atoms;
• wherein R4 represents —OR or —OH groups;
• wherein (Ia+Ib)/(II+III), meaning the average ratio of the sum of units of the general formulas Ia and Ib to the sum of units of the general formulas II and III, ranges from 0.5 to 1000, wherein II/III≤1;
• wherein the amino polyorganosiloxanes (A1) have a viscosity of from 4,000 to 6,000 mPa's measured at 25° C. according to DIN53019;
• wherein at least 80 mol % of units of the silicone resins (A2) are selected from those having the following general formulas VII, VIII, IX and X:
• wherein R10 represents hydrocarbon groups that have 1-40 carbon atoms and are optionally substituted by halogens, or H, —OR or —OH groups;
• wherein at least 20 mol % of the units are selected from those having the general formulas IX and X, wherein at most 30 wt % of R10 are —OR and/or —OH groups, based on the total weight of the silicone resins (A2);
• wherein in the terminal groups of the amino polyorganosiloxanes (A1), the number of moles of hydroxyl groups is greater than that of alkoxy groups;
• and
• wherein the emulsion is used in leave-on or rinse-off hair care products to make hairstyles hold or to maintain the degree of curling of the said hair.

A film-forming oil-in-water emulsion, comprising:

• one or more amino polyorganosiloxanes (A1), one or more silicone resins (A2), a low-viscosity oil (A3), a surfactant composition (B) and water;
• wherein at least 80 mol % of units of the amino polyorganosiloxanes (A1) are selected from those having the following general formulas Ia, Ib II and III:
• wherein a has the value 0 or 1;
• wherein b has the value 1 or 2;
• wherein a+b is equal to 2;
• wherein R1 represents monovalent hydrocarbon groups having 1-40 carbon atoms;
• wherein R2 represents aminoalkyl groups of the general formula IV:
• wherein R5 represents divalent hydrocarbon groups having 1-40 carbon atoms;
• wherein R6 represents divalent hydrocarbon groups having 1-40 carbon atoms, H, hydroxymethyl or alkanoyl;
• wherein R7 represents groups of the general formula V:
• wherein x is 0 or an arbitrary integer from 1 to 40;
• wherein R8 represents divalent groups of the general formula VI:
• wherein y an arbitrary integer from 1 to 6;
• wherein R9 represents H or hydrocarbon groups having 1-40 carbon atoms;
• wherein R3 represents optionally halogen-substituted hydrocarbon groups having 1-40 carbon atoms;
• wherein R4 represents —OR or —OH groups;
• wherein (Ia+Ib)/(II+III), meaning the average ratio of the sum of units of the general formulas Ia and Ib to the sum of units of the general formulas II and III, ranges from 0.5 to 1000, wherein II/III≤1;
• wherein the amino polyorganosiloxanes (A1) have a viscosity of from 3,000 to 9,000 mPa's measured at 25° C. according to DIN53019;
• wherein at least 80 mol % of units of the silicone resins (A2) are selected from those having the following general formulas VII, VIII, IX and X:
• wherein R10 represents hydrocarbon groups that have 1-40 carbon atoms and are optionally substituted by halogens, or H, —OR or —OH groups;
• wherein at least 20 mol % of the units are selected from those having the general formulas IX and X,
• wherein at most 30 wt % of R10 are —OR and/or —OH groups, based on the total weight of the silicone resins (A2);
• wherein in the terminal groups of the amino polyorganosiloxanes (A1), the number of moles of hydroxyl groups is greater than that of alkoxy groups;
• wherein the low-viscosity oil (A3) contains a volatile one in an amount of greater than or equal to 90 wt % and a viscosity of less than 100 mm2/s, measured according to DIN 51562 at 25° C.;
• and
• wherein the mass ratio of the low-viscosity oil (A3) to the silicone resins (A2) is from 5 to 20;
• wherein the emulsion is used in leave-on or rinse-off hair care products to make hairstyles hold or to maintain the degree of curling of the said hair.