Glucamides In Syndet Soaps

Abstract

Disclosed are compositions containing:at least one N-alkyl-N-acyl glucamine as component A;at least one fatty acid and/or soap as component B;at least one acyl isethionate as component C;sodium isethionate as component D;water as component E; andoptionally, at least one other additive as component F. More than 20 weight percent, preferably more than 70 weight percent of the N-alkyl-N-acyl glucamines contain at least one C.sub.12- and/or C.sub.14- and/or C.sub.16- and/or C.sub.18-acyl group. Said compositions can be used as bars of soap.

Claims

1. A composition comprising: at least one N-alkyl-N-acylglucamine as component A, at least one fatty acid and/or soap as component B, at least one acyl isethionate as component C, sodium isethionate as component D, water as component E, optionally at least one further additive as component F, where more than 20% by weight, of the N-alkyl-N-acylglucamines contain at least one C.sub.12 and/or C.sub.14 and/or C.sub.16 and/or C.sub.18-acyl group.

2. The composition as claimed in claim 1, comprising: 0.5-5.0% by weight, of the composition of component A, 25.0-50.0% by weight, of the composition of component B, 28.0-50.0% by weight, of the composition of component C, 2.0-10.0% by weight, of the composition of component D.

3. The composition as claimed in claim 1, where more than 90% by weight of the N-alkyl-N-acylglucamines contain at least one C.sub.12 and/or C.sub.14 and/or C.sub.16 and/or C.sub.18-acyl group.

4. The composition as claimed in claim 1, where the at least one component A consists of one or more C.sub.8-C.sub.22-N-alkyl-N-acylglucamines.

5. The composition as claimed in claim 1, where the component A consists of one or more C.sub.8-C.sub.22-N-methyl-N-acylglucamines.

6. The composition as claimed in claim 1, where the at least one component B comprises a C.sub.12-C.sub.18 fatty acid, salt thereof or a mixture thereof.

7. The composition as claimed in claim 1, where the at least one component B consists of lauric acid, palmitic acid, stearic acid, salts thereof or mixtures thereof.

8. The composition as claimed in claim 1, where the at least one component C consists of sodium lauroyl isethionate, sodium cocoyl isethionate or mixture thereof.

9. The composition as claimed in claim 1, where the at least one component F is selected from the group consisting of preservatives, fragrances, dyes, surfactants, cationic polymers, pigments, superfatting agents, antimicrobial and biogenic active ingredients, moisturizing agents, stabilizers, acids and alkalis.

10. A cosmetic or dermatological composition comprising the composition as claimed in claim 1.

11. A soap bar comprising the composition as claimed in claim 1.

12. A for treating or caring for the skin, the hair or skin and hair comprising the composition as claimed in claim 1.

13. A process for producing a composition comprising: at least one N-alkyl-N-acylglucamine as component A, at least one fatty acid and/or soap as component B, at least one acyl isethionate as component C, sodium isethionate as component D, water as component E, optionally at least one further additive as component F, where more than 20% by weight, of the N-alkyl-N-acylglucamines contain at least one C.sub.12 and/or C.sub.14 and/or C.sub.15 and/or C.sub.18-acyl group where the components A, B, C, D, E and optionally F are brought into contact with one another.

14. The composition as claimed in claim 1 where more than 70% by weight, of the N-alkyl-N-acylglucamines contain at least one C.sub.12 and/or C.sub.14 and/or C.sub.16 and/or C.sub.18-acyl group.

15. The composition as claimed in claim 1, comprising: 1.0-3.0% by weight, of the composition of component A, 25.0-35.0% by weight, of the composition of component B, 40.0-48.0% by weight of the composition of component C, 3.0-6.0% by weight of the composition of component D.

Description

EXAMPLES

[0154] The N-alkyl-N-acylglucamines described below were prepared in accordance with EP 0 550 637 from the corresponding fatty acid methyl esters and N-acylglucamide in the presence of 1,2-propylene glycol as solvent, and obtained in the form of a solid consisting of active substance, i.e. N-alkyl-N-acylglucamine, and 1,2-propylene glycol (all data in % by weight).

TABLE-US-00001 TABLE 1 Preparation examples for N-alkyl-N-acylglucamine Active 1,2- Melting Preparation substance Propylene point example Methylester Triglyceride (%) glycol (%) ( C.) 1 C12/14 90 10 85 (C12: 70%, C14: 30%) 2 C16/18 80 20 65 (C16: 60%; C18: 40%) 3 Coconut oil 90 10 55 (C8: 6% C10: 6% C12: 48% C14: 20% C18: 2% C18: 8%) C18 means an oleoyl radical. The melting point was determined by means of a Kofler hot bench. Compositions (soap bars) (all percentages are % by weight based on the composition)

[0155] Composition No. 1 (Use as Syndet Bar)

[0156] 46.2% Hostapon SCI 65C (comprises 65% sodium cocoyl isethionate and

[0157] 35% stearic acid)

[0158] 25.2% stearic acid

[0159] 1% glucamine (as per Table 1)

[0160] 10% polyglycol 20000P

[0161] 5% Hostapon SI (57% solution of sodium isethionate in water)

[0162] 0.05% etidronic acid

[0163] 2.0% corn starch

[0164] 0.3% titanium dioxide

[0165] 9.25% water (deionized)

[0166] 1% citric acid

[0167] Composition No. 2 (Standard for Syndet Soap)

[0168] 47.2% Hostapon SCI 65C (comprises 65% sodium cocoyl isethionate and

[0169] 35% stearic acid)

[0170] 25.2% stearic acid

[0171] 0% N-alkyl-N-acylglucamine (as per Table 1)

[0172] 10% polyglycol 20000P

[0173] 5% Hostapon SI (57% solution of sodium isethionate in water)

[0174] 0.05% etidronic acid

[0175] 2.0% corn starch

[0176] 0.3% titanium dioxide

[0177] 9.25% water (demineralized)

[0178] 1% citric acid

[0179] Preparation of the Compositions

[0180] The compositions were prepared in a soap machine which consists of a laboratory kneader (model LTK 3R), roller flocker (W3K-32 R) and a screw extruder (SVZ 75R).

TABLE-US-00002 TABLE 2 Properties of the compositions compared to composition 2 No. of Amount of the soap Composition lather Hardness 1 Composition 1 More lather Brittle (N-alkyl-N-acylglucamine as per preparation example 2) 2 Composition 1 More lather Increased (N-alkyl-N-acylglucamine as hardness per preparation example 3) 3 Composition 1 More lather Increased (N-alkyl-N-acylglucamine as hardness per preparation example 1)

[0181] The properties were ascertained by three test persons by means of handwashing with the compositions. The hardness was ascertained by manual evaluation.

[0182] The amount of lather and the hardness were determined compared to composition 2 which comprised no N-alkyl-N-acylglucamines.

[0183] Result

[0184] N-Alkyl-N-acylglucamines as per preparation examples 1 and 3 increase the amount of lather in composition 1 and lead to an increased hardness compared to the standard (composition 2).

[0185] Analysis of the Dissolution Behavior (Mushiness) of the Compositions as Soap Bars

[0186] Carrying Out the Analysis

[0187] Each soap bar is placed into a vessel of identical volume. The position of the soap bar is kept similar as far as possible. After positioning the soap bar, the vessel is filled with a specified amount of water, which is identical for each vessel and therefore for each soap bar. Each vessel is sealed with aluminum foil in order to avoid evaporation and stored at room temperature. After 1, 4, 5, 9 and 14 days, the length of each soap bar is measured. The results are shown in Table 3.

[0188] To determine the mechanism which leads to the dissolution (mushiness) of the soap bars, after one day the surface of the soap bar is analyzed by means of microscopy using polarized light. The results are shown in FIG. 1.

[0189] The soaps 1, 2 and 3 according to the invention with a lamellar structure of the surface have a slower dissolution in water here, which in practice leads to a longer durability of the syndet soap for the consumer. By contrast, the control sample (composition 2, control 9-SM-9) already shrunk considerably after one day.

TABLE-US-00003 TABLE 3 Data for the length of the soap bar in [cm] as a function of the composition and number of days. The soaps 1, 2 and 3 correspond to those from Table 2. 0 1 4 5 9 14 Soap No. days day days days days days 1 (RM68 9-SM-10) 6.0 5.5 3.5 0 2 (RMCC 9-SM-11) 5.5 5.0 0 3 (RM24 9-SM-12) 6.0 5.5 5.0 4.2 4.0 0 Composition 2 6.0 4.5 0 (control 9-SM-9)

[0190] In soaps of composition 1, in particular N-alkyl-N-acylglucamines as per preparation example 1 with a C.sub.12/14 chain cut significantly slow the dissolution of the syndet soap.

[0191] The increases in the results from Table 3 are shown in FIG. 2.