OPAQUE COMPOSITION COMPRISING ETHYLENE GLYCOL DISTEARATE

Abstract

The invention relates to a process for preparing an opaque composition using ethylene glycol distearate.

Claims

1. A process for preparing an opaque composition comprising the steps of: a) providing a starting composition comprising A) from 0.5 parts by weight to 15 parts by weight of at least one surfactant, B) from 0.5 parts by weight to 15 parts by weight of at least one emulsifier, C) from 10 parts by weight to 30 parts by weight ethylene glycol distearate, and D) from 20 parts by weight to 85 parts by weight water, b) stirring the starting composition at a temperature in a range from 60° C. to 100° C., and c) cooling to a temperature in a range from 5° C. to 55° C., to obtain the opaque composition.

2. The process according to claim 1, wherein the at least one surfactant in component A) is selected from the group consisting of anionic and amphoteric surfactants.

3. The process according to claim 1, wherein the at least one emulsifier in component B) is selected from the group consisting of alkoxylates, fatty acid esters, and glycosides.

4. The process according to claim 1, wherein the starting composition of process step a) has a pH of from 4 to 7 at 20° C.

5. The process according to claim 1, wherein process step c) is carried out at a cooling rate of from 0.1° C./min to 15° C./min.

6. The process according to claim 1, wherein in process step c) the cooling is carried out at least partially by adding water to the starting composition, obtaining an opaque composition having a water content of 50% by weight to 85% by weight water, where the percentages by weight refer to the total composition.

7. The opaque composition obtainable by a process according to claim 1.

8. An opaque composition comprising A2) from 0.5% by weight to 15% by weight of at least one surfactant, B2) from 0.5% by weight to 15% by weight of at least one emulsifier, C2) from 10% by weight to 30% by weight ethylene glycol distearate, D2) from 50% by weight to 84% by weight water, where the percentages by weight refer to the total composition.

9. The opaque composition according to claim 7, wherein said composition, at a concentration of from 0.3% by weight in water, where the percentages by weight refer to the sum total of water and total formulation, has a turbidity value of 500 or more formazin nephelometric units.

10. A process for preparing opaque formulations comprising the process steps of a) providing a starting composition comprising A) from 0.5 parts by weight to 15 parts by weight of at least one surfactant, B) from 0.5 parts by weight to 15 parts by weight of at least one emulsifier, C) from 10 parts by weight to 30 parts by weight ethylene glycol distearate, and D) from 20 parts by weight to 85 parts by weight water, b) stirring the starting composition at a temperature in a range from 60° C. to 100° C., c) cooling to a temperature in a range from 5° C. to 55° C., preferably 10° C. to 50° C. to obtain the opaque composition, d) blending the opaque composition with further components in a temperature range from 5° C. to 40° C. to obtain an opaque formulation.

11. The opaque formulation obtainable by a process according to claim 10.

12. The opaque formulation comprising an opaque composition according to claim 7, in an amount of from 0.1% by weight to 15% by weight, where the percentages by weight refer to the total composition.

13. The opaque formulation according to claim 11, wherein said formulation has a turbidity value of 600 or more formazin nephelometric units.

14. The opaque formulation according to claim 11, wherein said formulation has no pearlescent properties.

15. The use of an opaque composition according to claim 7 as opacifier.

16. The process according to claim 1, wherein b) stirring the starting composition at a temperature in a range from 70° C. to 90° C., and c) cooling to a temperature in a range from 15° C. to 45° C. to obtain the opaque composition.

17. The process according to claim 1, wherein the at least one surfactant in component A) is selected from the group consisting of amphoacetates and amphopropionates.

18. The process according to claim 1, wherein the at least one surfactant in component A) is selected from the group consisting of sulfosuccinates derived from monoesters.

19. The process according to claim 1, wherein the at least one emulsifier in component B) is selected from the group consisting of ethoxylated fatty alcohols and polyglycerol fatty acid esters.

20. The process according to claim 1, wherein process step c) is carried out at a cooling rate of from 0.3° C./min to 5° C./min.

Description

[0102] The following figures are part of the examples:

[0103] FIG. 1: Turbidity values of inventive formulations 1-7 and comparative formulation C1-C7

[0104] FIG. 2: Turbidity values of the inventive opaque composition diluted in water according to example 1 and of the market standard styrene/acrylates copolymer.

EXAMPLES

[0105] In the following, the constituents of the compositions are named in the form of the generally recognized INCI nomenclature using the English terms. The viscosities were measured at 22° C. using a Brookfield viscometer and a spindle 5. The number of revolutions was set at 10 or 100 revolutions per minute depending on the resistance.

Example 1: Preparation of Inventive Opaque Compositions

Example 1.1: Inventive Opaque Composition

[0106] A mixture of 5 parts by weight Disodium Laureth Sulfosuccinate, 7 parts by weight Laureth-4, 17 parts by weight Glycol Distearate and 25 parts by weight water was stirred at 80° C. for 0.5 h.

[0107] The mixture was then cooled to 35° C. over 20 minutes by adding 45 parts by weight water (20° C.).

[0108] A white, homogeneous suspension was obtained, which was stored at 22° C. and had a viscosity of 340 mPa s after 24 h and 452 mPa s after 1 week. The suspension did not show any separation effects within 6 weeks.

Example 1.2: Inventive Opaque Composition

[0109] A mixture of 6 parts by weight of Sodium Laureth Sulfate, 7 parts by weight of Laureth-4, 16 parts by weight of Glycol Distearate and 37 parts by weight of water was stirred at 80° C. for 0.5 h. Subsequently, with addition of 34 parts by weight of water (20° C.), the mixture was cooled down to 35° C. within 0.5 h.

[0110] A white, homogeneous suspension was obtained, which was stored at 22° C. and had a viscosity of 11640 mPa s after 24 h and 16400 mPa s after 1 week. The suspension did not show any separation effects within 6 weeks.

Example 1.3: Inventive Opaque Composition

[0111] A mixture of 9 parts by weight of Sodium Laureth Sulfate, 2 parts by weight of Cocamidopropyl Betaine, 1 part by weight of Glyceryl Oleate, 25 parts by weight of Glycol Distearate and 63 parts by weight of water was stirred at 80° C. for 0.5 h. This was followed by cooling to 27° C. within 1.5 h.

[0112] A white, homogeneous suspension was obtained, which was stored at 22° C. and had a viscosity of 2600 mPa s after 24 h and 3700 mPa s after 1 week. The suspension did not show any separation effects within 6 weeks.

Example 1.4: Inventive Opaque Composition

[0113] A mixture of 6 parts by weight of Disodium Lauryl Sulfosuccinate, 7 parts by weight of Glyceryl Laurate, 17 parts by weight of Glycol Distearate and 24 parts by weight of water was stirred at 80° C. for 0.5 h. Subsequently, the mixture, with addition of 46 parts by weight of water (20° C.), was cooled down to 35° C. within 20 minutes.

[0114] A white, homogeneous suspension was obtained, which was stored at 22° C. and, after 24 h, had a viscosity of 30000 mPa s. The suspension did not show any separation effects within 6 weeks.

Example 1.5: Inventive Opaque Composition

[0115] A mixture of 6 parts by weight of Disodium Lauryl Sulfosuccinate, 5 parts by weight of Glyceryl Laurate, 17 parts by weight of Glycol Distearate and 39 parts by weight of water was stirred at 80° C. for 0.5 h. Subsequently, the mixture, with addition of 33 parts by weight of water (20° C.), was cooled down to 35° C. within 20 minutes.

[0116] A white, homogeneous suspension was obtained, which was stored at 22° C. and, after 24 h, had a viscosity of 1080 mPa s. The suspension did not show any separation effects within 6 weeks.

Example 1.6: Inventive Opaque Composition

[0117] A mixture of 6 parts by weight of Disodium Lauryl Sulfosuccinate, 6 parts by weight of Glyceryl Oleate, 17 parts by weight of Glycol Distearate and 39 parts by weight of water was stirred at 80° C. for 0.5 h. Subsequently, the mixture, with addition of 32 parts by weight of water (20° C.), was cooled down to 35° C. within 20 minutes.

[0118] A white, homogeneous suspension was obtained, which was stored at 22° C. and, after 24 h, had a viscosity of 2400 mPa s. The suspension did not show any separation effects within 6 weeks.

Example 2: Inventive Opaque Composition

[0119] A mixture consisting of 8% by weight Disodium Cocoamphopropionate, 10% by weight Laureth-4, 25% by weight Glycol Distearate and 57% by weight water was stirred at 80° C. for 1 h. The mixture was then cooled to 30° C. over a period of 60 minutes.

Example 3: Determination of the Turbidity Values of Formulations According to the Invention Comprising Inventive Opaque Composition

[0120] The inventive composition of example 1.1 was homogeneously stirred into a surfactant mixture consisting of 9 parts by weight SLES (Sodium Laureth Sulfate) and 3 parts by weight CAPB (Cocamidopropyl Betaine) according to Table 1 and thickened by adding 1% NaCl:

TABLE-US-00001 TABLE 1 Inventive opaque formulations 1-7 prepared from inventive example 1.1 — 1 2 3 4 5 6 7 SLES (28% a.m.) 32 32 32 32 32 32 32 Water 58.65 58.45 58.25 58.05 57.95 57.85 57.75 TEGO ® Betain F 8 8 8 8 8 8 8 50 (38% a.m.) Inventive 0.1 0.3 0.5 0.7 0.8 0.9 1 Example 1.1 NaCl 0.8 0.8 0.8 0.8 0.8 0.8 0.8 Neolone PE 0.45 0.45 0.45 0.45 0.45 0.45 0.45 pH 5.5 5.5 5.5 5.5 5.5 5.5 5.5

[0121] For comparison, a benchmark styrene/acrylates copolymer was also stirred homogeneously into the same surfactant mixture and analogously thickened:

TABLE-US-00002 TABLE 2 Comparative formulations C1-C7 — C1 C2 C3 C4 C5 C6 C7 SLES (28% a.m.) 32 32 32 32 32 32 32 Water 58.65 58.45 58.25 58.05 57.95 57.85 57.75 TEGO ® Betain F 8 8 8 8 8 8 8 50 (38% a.m.) Acusol OP 301 0.1 0.3 0.5 0.7 0.8 0.9 1 (17% a.m.) NaCl 0.8 0.8 0.8 0.8 0.8 0.8 0.8 Neolone PE 0.45 0.45 0.45 0.45 0.45 0.45 0.45 pH 5.5 5.5 5.5 5.5 5.5 5.5 5.5

[0122] The turbidity values were determined for the inventive opaque formulations 1-7 and the comparative formulations C1-C7. The measuring instrument used was an Iso Turbidity Meter, HI 88713 from Hanna Instruments, which was operated in the measuring mode: “NTU ratio mode”. For this purpose, indexed cuvettes were filled up to the 10 mL mark and degassed. The cuvettes were then measured in the measurement cell at room temperature. The cuvette was turned 90° after each measurement. In this way, four measurements in total were taken and the average value then calculated. The measured values are reported in NTU.

[0123] The results are shown in FIG. 1. The measured values in FIG. 1 show that the formulations according to the invention have significantly higher turbidity values at the same active content.

Example 4: Turbidity Values of the Inventive Compositions

[0124] In a manner analogous to Example 3, the turbidity values of the inventive composition according to Example 1.1 were measured in a dilution series in water.

[0125] The results are summarized in FIG. 2: The opaque composition according to the invention shows comparable turbidity values to the market standard styrene/acrylates copolymer.

[0126] Analogously to Example 3, the turbidity values of the composition according to the invention as per Examples 1.1 to 2 were measured at a concentration of 0.5% by weight.

[0127] Turbidity values, 0.5% in SLES/CAPB:

TABLE-US-00003 Example 1.1 1864 NTU Example 1.2 1739 NTU Example 1.3 4000 NTU Example 1.4 1628 NTU Example 1.5 1660 NTU Example 1.6 1669 NTU Example 2 1350 NTU

Example 5: Determination of Pearlescent Properties

[0128] To determine luminance, 3% of the blends are carefully stirred into a surfactant mixture of SLES/CAPB (11.2:3.8 active matter) thickened with 0.8% PEG-18 Glyceryl Oleate/Cocoate (ANTIL 171, sold commercially by EVONIK Nutrition&Care GmbH) and about 0.4% NaCl, so as to achieve a viscosity of 3000-4000 mPas (Brookfield, spindle 2, 30 rpm).

[0129] 38 g of these formulations are then introduced into a black plastic lid (height 1.9 cm; diameter 5.9 cm) and placed onto a black background within a light tent (manufacturer: Neewer, product number: 10026118, size: 40×40×40 cm). A digital camera (Canon EOS 605) equipped with a zoom lens (Canon EF-S 18-55 mm, 1:3.5-5.6) is fixed 32 cm above the upper edge of the lid. For homogeneous lighting of the sample, one external light source is set up to the right and one to the left of the light tent (eSmart ESL Photolamp: E27, diameter 72 mm, length 235 mm, 50 W, 3200 lumens, 5500K). The photos are taken at an aperture of f/5.5 and an exposure time of 1/100s, and zoom setting 55 mm. The photos are analysed using the program Photoshop CC 2015 Version 2015.0.1. For this purpose, a 60×60 mm image section is cut out of the middle of the photo and the histogram is read off. The luminance values thus obtained are evaluated and compared. The comparative substance used is the pearlescent agent TEGO Pearl N 300, sold commercially by EVONIK Nutrition&Care GmbH.

TABLE-US-00004 Example 1.1 190 Example 1.2 187 Example 1.3 195 Example 1.4 197 Example 1.5 187 Example 1.6 187 TEGO Pearl N 300 (comparison) 180