Process for preparing perfumed detergent products

• US 5,288,423 A
• Filed: 07/10/1991
• Issued: 02/22/1994
• Est. Priority Date: 07/11/1990
• Status: Expired due to Term

• Current Assignee: Quest International B.V.. (Givaudan SA)
• Original Assignee: Unilever Patent Holdings BV (Unilever PLC)
• Inventors: Smith, William M., Ness, Jeremy N., Behan, John M., Perring, Keith D.
• Primary Examiner(s): MCFARLANE, ANTHONY R
• Application Number:
  US07/727,635
• Time in Patent Office: 958 Days
• Field of Search: 252/174.11, 252/559, 252/8.6, 252/8.9, 252/32, 252/315.4, 252/DIG. 5, 252/DIG. 13, 252/DIG. 14
• US Class Current: 510/119
• CPC Class Codes: A61K 8/0295 Liquid crystals
• CPC Class Codes: A61Q 13/00 Formulations or additives for perfume preparations essential oils or perfumes per se C11B9/00
• CPC Class Codes: C11D 3/505 encapsulated or adsorbed on a carrier, e.g. zeolite or clay
• CPC Class Codes: Y10S 516/90 Liquid crystal material of, or for, colloid system, e.g. g phase

Abstract

The invention concerns a process for incorporating a perfume into a detergent product, wherein the perfume is first combined with one or more non-ionic emulsifiers and an aqueous phase to form a structured emulsion containing liquid crystal structures, which surround the dispersed perfume, and thereafter this structured emulsion is dispersed into a detergent composition. The invention also concerns the detergent products thus obtained. The structured emulsion comprises 1-30% by weight of non-ionic emulsifiers, 1-50% by weight of a perfume and 20-98% by weight of an aqueous phase. The detergent product comprises at least 4% by weight of surfactant.

Claims

1. A process for incorporating a perfume into a detergent product comprising the steps of:

combining a dispersed perfume with one or more non-ionic emulsifiers at a temperature sufficient to form a homogeneous non-aqueous liquid phase;

heating an aqueous phase, consisting essentially of water, to a temperature substantially the same as the non-aqueous liquid phase;

mixing the aqueous phase and non-aqueous phase under shear conditions such that an emulsion containing liquid crystal structures, which surround the dispersed perfume is formed;

dispersing the structured emulsion into a detergent composition.

2. A process according to claim 1 wherein the emulsion comprises 1-30% by weight of non-ionic emulsifiers, 1-50% by weight of a perfume and 20-98% by weight of an aqueous phase.

3. A process according to claim 2 wherein the non-ionic emulsifiers are chosen from

i. Fatty alcohols and polyethoxylated fatty alcohols of the formula:

space="preserve" listing-type="equation">CH3--(CH2).sub.x --(CH═

CH).sub.y --(CH2).sub.z --(O--CH2--CH2).sub.w --OH

wherein;

w ranges from 0≧

20;

y is 0 or 1;

x+z+2y=11-23;

ii. Branched fatty alcohols and polyethoxylated fatty alcohols of the formula;

space="preserve" listing-type="equation">R--(O--CH2--CH2).sub.w --OH

wherein;

R is a branched alkyl group of 12-18 carbon atoms and w is as specified above;

iii. Glycerol mono-fatty acid esters;

iv. Fatty acid esters of polyethylene glycols of the formula;

space="preserve" listing-type="equation">R1--(O--CH.sub.2 --CH.sub.2).sub.w --OH or

space="preserve" listing-type="equation">R1--(O--CH.sub.2 --CH.sub.2).sub.w --O--R1

wherein R1 is a stearoyl, lauroyl, oleoyl or palmitoyl residue;

w ranges from 2-20;

v. Sorbitan fatty acid mono- and tri-esters of the formula;

##STR7## wherein;

R1 is H or ##STR8## and R2 is ##STR9## and w ranges from 10-16;

vi. Polyethoxylated sorbitan fatty acid esters of the formula;

##STR10## wherein;

R1 is ##STR11## and R2 is ##STR12## u ranges from 10-16 and (w+x+y+z)is 2-20.

4. A process according to claim 2 wherein the emulsion additionally comprises one or more structuring aids chosen from surfactants other than non-ionics in an amount of 0-50% and/or sterols in an amount of 0-100% by weight of the non-ionic emulsifier.

5. A process according to claim 2 wherein the perfume contains hydrophobic adjuncts in an amount of 0-30% by weight of the non-aqueous phase.

6. A process according to claim 2 wherein the aqueous phase contains hydrophilic adjuncts in an amount of 0-30% by weight of the aqueous phase.

7. The process according to claim 2 further comprising at least one of the following steps selected from the group consisting of:

adding hydrophobic adjuncts to the non-aqueous phase and adding hydrophilic adjuncts to the aqueous phase, prior to mixing the aqueous phase and non-aqueous phase.

8. A process according to claim 6 wherein the emulsion comprises 4-25% by weight of non-ionic emulsifier(s), 10-50% of perfume and 25-86% of aqueous phase and the weight ratio of total emulsifier, including optional structuring aids, to perfume lies within the range 1:

3 to 3;

1 and the weight ratio of non-aqueous phase to aqueous phase lies within the range 1;

2 to 4;

3.

9. A process according to claim 1 wherein the emulsion is added to a detergent composition so as to produce a detergent product comprising 4-90% by weight of cationic, anionic, non-ionic or amphoteric surfactant, 0.15-98% of water, 0.01-30% of perfume and 0-60% by weight of optional adjuncts chosen from:

abrasives, colours, dyes, preservatives, bleaches, optical brighteners, thickeners, emollients, conditioners, clarifiers, sunscreen agents, pearlescent agents, salts, therapeutic agents, structurants, stabilisers, and co-solvents.

10. A shampoo product produced from the process according to claim 9.

11. A solid or liquid soap produced from the process according to claim 9.

12. A foam bath product produced from the process according to claim 9.

13. A shower gel produced from the process according to claim 9.

14. A laundry washing product produced from the process according to claim 9.

15. A fabric conditioner produced from the process according to claim 9.

16. A domestic cleaner or bleach product produced from the process according to claim 9.