WO1999057233A1

WO1999057233A1 - Perfume composition

Info

Publication number: WO1999057233A1
Application number: PCT/GB1999/001401
Authority: WO
Inventors: Christopher Francis Clements; Christopher Charles Piddock; Keith Douglas Perring
Original assignee: Quest International B.V.
Priority date: 1998-05-07
Filing date: 1999-05-05
Publication date: 1999-11-11
Also published as: AU3835399A; GB9809772D0

Abstract

Deodorant perfumes, bleach compositions and bleaching detergent compositions containing such deodorant perfumes. The deodorant perfume is a mixture of fragrance materials having a Malodour Reduction Value of 0.25 to 3.0 and containing at least 55 % by weight of components having a Lipoxidase-Inhibiting Capacity of at least 50 % or a Raoult Variance Ratio of at least 1.1 in the Morpholine Test, or fall within 6 defined chemical classes.

Description

1 PERFUME COMPOSITION

This invention relates to deodorant perfumes, and to bleach compositions and bleaching detergent compositions containing such perfumes. 5 A number of documents, including EP-A-3172 and EP-A-545556 teach that certain perfumes formulated from selected fragrance materials are able to perform a deodorant function. More specifically these documents teach that when such a perfume is incorporated into a detergent composition, and garments are washed with that composition, development of human body malodour will be inhibited when the garments are worn. 0 It is well known to incorporate a bleach into a detergent composition, and it is known that a bleach can damage other ingredients of a detergent composition, including perfume.

Many perfume compositions undergo undesired change or degradation after prolonged storage in a detergent composition containing bleach. This problem has become greater. 5 There have been a number of proposals which address this problem. For example, the bleach active, bleach precursor or both may be encapsulated to eliminate or reduce contact with the perfume. It is known in the art to screen perfume ingredients to identify those which display acceptable chemical stability or olfactory performance during storage in the presence of the bleaching system. This second route was disclosed in WO92/08780 (Procter and 0 Gamble) and in EP299561 (Unilever), both of which describe stability/performance tests. EP-A-147191 discloses certain rules for the formulation of deodorant perfume compositions which are resistant to perborate bleach accompanied by N,N,N' ,N' -tetraacetylethylene diamine (TAED) as bleach precursor.

Over and above the general problem that detergent compositions present increasing 5 inherent bleach hostility to perfume, there is the further difficulty that in many countries the ambient conditions place severe additional strain on perfume stability and performance (eg. in many countries it is desirable that the perfume be capable of delivering acceptable performance following storage in bleach laundry powder for 4 weeks or more at temperatures of at least 37 °C, possibly at least 40 or 45 °C, and often with high humidities such as at least

30 70% relative humidity). Even encapsulation of the bleach system may prove inadequate to prevent perfume decomposition.

According to a first aspect of the present invention, a deodorant perfume composition is a mixture of fragrance materials which gives a Malodour Reduction Value of 0.25 to 3.0 in 2 a Malodour Reduction Test as set out in EP-A-147191, and comprises at least 55wt% (based on the perfume composition) of a plurality of component materials which:

have a Lipoxidase-lnhibiting Capacity (LIC value) of at least 50% in the Lipoxidase Test set out in EP-A-147191, • or have a Raoult Variance Ratio of at least 1.1 in the Moφholine Test set out in

EP-A-147191, or are named as components below; such components each falling within and being allocated to one of six classes as follows: class 1 : phenolic compounds class 2: natural essential oils or resins containing less than 20% (by weight of the oil or resin) of phenolic compounds class 3: aldehydes and ketones class 4: polycyclic compounds and nitriles class 5: esters class 6: alcohols and ethers, excluding polyols of molecular weight less than 140; provided that: a) any said component which could be allocated to more than one of the above classes shall be allocated to the class with the lowest number; b) any component material which is present in an amount less than 0.5wt% shall not be allocated to any said class; c) at least 17wt% of class 3 is present; d) at least 5wt% of class 4 is present; e) at least 20wt% of class 6 is present; f) no more than 15wt% by weight in total of classes 1 and 2 are present. The above percentages by weight are based on the whole perfume composition. 3 Perfume compositions embodying this invention may be incorporated into bleaching compositions, especially bleaching detergent compositions in solid form, and can deliver good performance following storage under conditions of temperature and humidity.

In a second aspect the invention provides a bleaching composition containing a peroxygen bleach and perfume as set forth above.

Such a bleaching composition may be a bleaching detergent composition containing synthetic (ie. non-soap) detergent in addition to the peroxygen bleach and perfume. Perfume Components

The component materials of the perfume and allocation to classes will now be discussed in greater detail.

Component materials must be among the listed materials below, and/or have an LIC value of at least 50% according to the Lipoxidase test and/or have an RVR value of at least 1.1 according to the Morpholine test. Some component materials have both an LIC value of at least 50% and an RVR value of at least 1.1. These two tests were set out in EP-A-147191 and the description of them is repeated here as follows: The Lipoxidase Test

In this test, the capacity of a material to inhibit the oxidation of linoleic acid by lipoxidase (EC 1.13.1.13) to form a hydroperoxide is measured.

Aqueous 0.2M sodium borate solution (pH 9.0) is used as a buffer. A control substrate solution is prepared by dissolving linoleic acid (2ml) in absolute ethanol (60ml), diluting with distilled water to 100ml and then adding borate buffer (100ml) and absolute ethanol (300ml).

A test substrate solution is prepared in the same way as the control substrate solution except that for the absolute ethanol (300ml) is substituted the same volume of a 0.5% by weight solution in ethanol of the material to be tested.

A solution of the enzyme lipoxidase in the borate buffer and having an activity within the range of from 15,000 to 40,000 units per ml is prepared.

The activity of the lipoxidase in catalysing the oxidation of linoleic acid is first assayed spectrophotometrically using the control. An automatic continuously recording spectrophotometer is used and the increase in extinction of 234nm (the peak for hydroperoxide) is measured to follow the course of oxidation, the enzyme concentration used being such that it gives an increase in optical density (ΔOD) at 234nm within the range of from 0.6 to 1.0 units per minute. The following materials are placed in two 3ml cuvettes: 4

Control (mP Blank (ml)

Control substrate solution 0.10 0.10

Absolute ethanol 0.10 0.10

Borate buffer 2.75 2.80 Lipoxidase solution 0.05

The lipoxidase solution is added to the control cuvette last and the reaction immediately followed spectrophotometrically for about 3 minutes, with recording of the increase in optical density at 234nm as a curve on a graph. The capacity of a material to inhibit the oxidation is then measured using a test sample containing enzyme, substrate and a deodorant material. The following ingredients are placed in two 3ml cuvettes.

Test ! Sample (ml) Blank (m\) Test substrate solution 0.10 0.10

Absolute ethanol 0.10 0.10

Borate buffer 2.75 2.80

Lipoxidase solution 0.05 -

The lipoxidase solution is added to the test sample cuvette last and the course of the reaction immediately followed as before.

The lipoxidase-inhibiting capacity of the material is then calculated from the formula 100 (S_[-S₂)/S, is the slope of the curve obtained with the control and S., is the slope of the curve obtained with the test sample, and thus expressed as % inhibition. A material that gives at least 50% inhibition in the test is hereafter referred to as having a Lipoxidase-lnhibiting Capacity (LIC value) of at least 50%. The Morpholine Test

In this test, the capacity of a material to depress the partial vapour pressure of morpholine more than that required by Raoult's Law is measured. Substances that undergo chemical reaction with morpholine, for example aldehydes, are to be regarded as being excluded from the test.

Morpholine (lg) is introduced into a sample bottle of capacity 20ml and the bottle fitted with a serum cap. The bottle is then incubated at 37 °C for 30 minutes in order to reach 5 equilibrium. The gas in the headspace of the bottle is analysed by piercing the serum cap with a capillary needle through which nitrogen at 37 °C is passed to increase the pressure in the bottle by a standard amount, the excess pressure then injecting a sample from the headspace into gas chromatograph apparatus, which analyses it and provides a chromatographic trace with a peak due to moφholine, the area under which is proportional to the amount of moφholine in the sample.

The procedure is repeated under exactly the same conditions using instead of moφholine alone, moφholine (0.25g) and the material to be tested (lg); and also using the material (lg) without the moφholine to check whether it gives an interference with the moφholine peak.

The procedure is repeated until reproducible results are obtained. The areas under the moφholine peaks are measured and any necessary correction due to interference by the material is made.

A suitable apparatus which has been used for carrying out the above procedure is a Perkin-Elmer Automatic GC Multifract F40 for Head Space Analysis. Further details of this method are described by Kolb in "CZ-Chemie-Technik", Vol. 1, No. 2, 87-91 (1972) and by Jentzsch et al in "Z. Anal. Chem." 236, 96-118 (1968). Headspace analysis for the moφholine test can also be carried out using other apparatus for sampling and gas chromatography, e.g. a Fisons GC 8000 Series gas chromatograph equipped with an HS 850 headspace autosampler.

The measured areas representing the moφholine concentration are proportional to the partial vapour pressure of the moφholine in the bottle headspace. If A is the area under the moφholine peak when only moφholine is tested and A' is the area due to moφholine when a material is present, the relative lowering of partial vapour pressure of moφholine by the material is given by (1 - A')/ A.

According to Raoult's Law, if at a given temperature the partial vapour pressure of moφholine in equilibrium with air above liquid moφholine is p, the partial vapour pressure p' exerted by moφholine in a homogenous liquid mixture of moφholine and material at the same temperature is pM/(M+PC), where M and PC are the molar concentrations of moφholine and material. Hence, according to Raoult's Law the relative lowering of moφholine partial vapour pressure (p-p' )/p, is given by(l-M)/(M+PC), which under the circumstances of the test is 87/(87+m/4), where m is the molecular weight of the perfume material. The molecular weight of moφholine is 87.

The extent to which the behaviour of the mixture departs from Raoult's Law is given by the ratio (1 - A') / A

87 / (87 + m / 4) The above ratio, which will be referred to as the Raoult Variance Ratio, is calculated from the test results. Where a material is a mixture of compounds, a calculated or experimentally determined average molecular weight is used for m. A material that depresses the partial vapour pressure of moφholine by at least 10% more than that required by Raoult's Law is one in which the Raoult Variance Ratio (RVR value) is at least 1.1.

Perfume materials with the required values of LIC, RVR or both are allocated to one of the six classes, unless they do not fall within the definition of any class, or are present in the perfume composition in small amount, less than 0.5 wt%. The perfume components which are used may desirably include a number of materials which, in addition to meeting other requirements for components, have a boiling point of 250 °C or above and an octanol/water partition coefficient P such that log₁₀P is 3.0 or above. Such materials have been reported to be substantive to fabrics and to give an enduring fragrance when deposited thereon. Class 1 is compounds which incoφorate a phenolic group, ie. an aromatic ring substituted with hydroxyl on the ring.

Examples of suitable perfume components in class 1 are

LIC RVR Bpt>250°C and logP>3.0 iso-amyl salicylate 95 1.24 yes benzyl salicylate 0 1.58 yes carvacrol 32 1.43 ethyl vanillin 100 1.43 iso-eugenol 100 1.48 methyl 2,4-diydroxy-3,6- 100 1.21 dimethyl benzoate [LRG 201]

thymol 7

Some perfume compositions of this invention do not include any material in this class. For some other perfume compositions embodying this invention, it has been found valuable to include a limited amount of such materials, not exceeding 15wt% of the perfume composition and possibly ranging from 1 to 10wt% of the perfume composition. Some natural essential oils contain high proportions of phenolic compounds, and may be included in a perfume composition as a source of such a compond. For example, thyme oil red contains thymol as the largest individual constituent (typically about 25 to 60% by weight of the oil, usually at least 35%).

A preferred group of class 1 materials excludes those with ethylenic or aldehydic unsaturation in substituent groups on the benzene ring.

Class 2 is natural essential oils and resins excluding any which contain more than 20% of phenolic compounds - although oils which contain phenolic compounds may be included in a composition as a source of class 1 materials, as mentioned above.

Some perfume compositions of this invention do not include any material in this class. Other perfume compositions of this invention include some natural oils, but it is preferred to restrict the amount of class 2 essential oils in the composition to not more than 10wt% better not more than 5wt% of the perfume composition.

Examples of essential oils with LIC values greater than 50% or RVR values greater than 1.1 are:

LIC RVR

Benzoin Siam Resiniod 87 -

Geranium oil 26 1.29

Opopnax resinoid 96 1.33

Patchouli oil 76 1.25

Petitgrain oil 34 1.27

Class 3 is aldehydes and ketones.

Examples of materials in this class are:

LIC RVR Bpt>250°C Preferred and logP>3.0 subset

6-acetyl- 1 , 1 ,3,4,4,6-hexamethyl- yes yes tetrahydronaphthalene [Tonalid] 100 1.03

p-t-amyl cyclohexanone 50 1.10 p-t-butyl-o -methyl yes hydrocinnamic aldehyde 74

2-n-heptylcyclopentanone 56 1.05 oc-iso-methyl ionone 100 1.13 yes yes β-methyl naphthyl ketone 100 0.96 yes yes benzyl acetone

2,7,8 -trimethyl- 1 -acetyl- yes yes cyclododeca-2,5,9-triene [Cyclisone] l-(l,2,8,8-tetramethyl- yes yes l,2,3,5,6,7,8,8a-octahydro-2- napthalenyl) -1-ethanone [iso E super]

2,2,7,7-tetramethyl- yes yes tricyclo [6.2.1.0'^{1 6}] undecan-5-one [isolongifolanone] l-(l-isopropyl-l, 3,3,6- yes yes tetramethyl-2,3 -dihydro- 1 H-5 - indenyl)- 1 -ethanone

1 -(3-isopropyl- 1 , 1 ,2,6- yes yes tetrarnethyl-2,3-dihydro-lH-5-

indenyl) -1-ethanone [Traseolide]

It is required in this invention that at least 17wt% of the perfume composition is class 3 material. Preferred is that such material is from 17 to 20 wt% up to 40 or 50 wt% of the perfume composition.

In a preferred composition, at least 17 wt% of the perfume composition is class 3 material selected from those named in the list above. Further preferred is that at least 15 wt%, better at least 17 or 20 wt% of the perfume composition and/or at least 75% by weight of the components in class 3 is selected from the materials indicated to belong to the preferred subset in the right hand column of the table above, i.e. 6-acetyl- 1,1,3, 4,4,6-hexamethyl- tetrahydronaphthalene [Tonalid], oc-iso-methyl ionone, β-methyl napththyl ketone, 2,7,8-trimethyl-l-acetyl-cycododeca-2,5,9-triene [Cyclisone], l-(l,2,8,8-tetramethyl-l,2,3,5,6,7,8,8a-octahydro-2-napthalenyl)-l-ethanone [iso E super], 2,2,7,7-tetramethyl-tricyclo [6.2.1.0^{1 6} ] undecan-5-one [isolongifolanone], l-(l-isopropyl-l,3,3,6-tetramethyl-2,3-dihydro-lH-5-indenyl)-l- ethanone and, 1 -(3-isopropyl- 1 , 1 ,2,6-tetramethyl-2,3 -dihydro- 1 H-5 -indenyl)- 1 -ethanone [Traseolide] . Class 4 is polycyclic compounds and nitriles. Polycylic compounds are those in which one or more atoms are members of more than one ring, in particular compounds with fused ring systems such as naphthalene and isobornene derivatives. This category includes polycyclic compounds with one or more heteroatoms present in a ring, such as quinoline derivatives.

Examples of materials in class 4 are:

LIC RVR Bpt>250°C Preferred and subset logP>3.0 iso-butyl quinoline ~ 1.10 yes coumarin 58 1.22 yes l,3,4,6,7,8-Hexahydro-4,6,6,7-8, yes yes 8-hexamethyl cyclopenta-γ-2- benzo-pyran [Galaxolide] 100

3a-methyl-dodecahydro-6,6,9a- 1.30 yes trimethylnaphtho(2,l-b) furan 58 β-naphthyl methyl ether [Yara] 100 -- yes yes cedryl methyl ether [Cedramber] yes tricyclo [5.2.1.0²'⁶]dec-4-en-8- yes yes yl propanoate [Florocyclene] ethyl yes yes tricyclo [5.2.1.0²'⁶]decane-2- carboxylate [Fruitate]

2-methyldecane nitrile yes

[Fruitonile]

It is required in this invention that at least 5wt% better at least 8 or 10wt% of the perfume composition is class 4 material. Preferred is that such material is from 10 to 40 wt% of the perfume composition. In a preferred composition, at least 10 wt% of the perfume composition is class 4 material selected from those named in the list above. Further preferred is that at least 5 or 8 wt% of the perfume composition and/or at least 75% by weight of the components in class 4 is selected from the materials indicated to belong to the preferred subset in the right hand column of the table above. 10

Class 5 is esters.

Examples of esters in this class are:

LIC RVR Bpt>250°C and logP>3.0 ortho-t-butyl cyclohexyl acetate yes

52 1.08 para-t-butyl cyclohexyl acetate 0.98 yes

54 diethyl phthalate 79 1.20 yes nonanediol-l,3-diacetate 33 1.17 yes

Nonanolide-1,4 92 0.87 i-Nonyl acetate 50 0.83 i-Nonyl formate 19 1.49 phenylethyl phenyl acetate 0 1.22 yes

dihydromyrcenyl formate >1.1

Preferred embodiments of this invention contain at least 5 wt% better at least 8 wt% of the perfume composition of esters in class 5. The amount of such class 5 esters is typically from 5 wt% up to 20 or 25 wt% of the perfume composition.

In some preferred compositions, at least 5 wt% of the perfume composition is class 5 material selected from those named in the list above.

Class 6 is alcohols and ethers but excludes polyols of molecular weight below 140 such as dipropylene glycol. Such polyols are polar compounds, known for use as carriers, which generally do not themselves deposit on fabric from a wash liquor.

11

Examples of materials in this class are:

LIC RVR Bpt>250°C Preferred and logP>3.0 subset cinnamic alcohol ~ 1.28 dihydromyrceno 1 — >1.1 hydroxyme hyl isopropyl 1.23 cyclohexane [Mayol] 60 tetrahydromuguo 1 24 1.23 phenyl ethyl alcohol 22 1.24 yes tetrahydrolinalol >1.1 yes

1 -[(2'-t-butylcyclohexyl) yes yes oxy]-butan-2-ol [Amber Core]

1 -(ethoxymethoxy) cyclodoecane yes yes [Boisambrene forte] phenylethyl isoamyl ether [Anther]

2-ethyl-4-(2',2'3'-trimethyl- 1.26 yes yes cyclopent-3'-enyl)-but-2-enol

[Bangalol] diphenyl oxide yes

3 -methyl-5 -phenylpentanol yes yes [Phenoxanol]

5-(sec-butyl)-2-(2',4'- yes yes dimethylcyclohex-3'-enyl)-5-

methyl- 1 ,3 -dioxane [Karanal]

Dihydromyrcenol in class 6 and dihydromyrcenyl formate in class 5 may be incoφorated together as the commercially available material "dimyrcetol" which contains approximately equal amounts of both.

It is required in this invention that at least 20wt% of the perfume composition is class

6 material. Preferred is that such material is from 20wt% up to 50 or 60 wt% of the perfume composition. In a preferred composition, at least 20 wt% of the perfume composition is class 6 material selected from those named in the list above. Further preferred is that at least 15 wt%, better at least 20 wt% of the perfume composition and/or at least 75% by weight of the components in class 6 is selected from the materials indicated to belong to the preferred subset in the right hand column of the table above. 12

It will be appreciated that a perfume composition of this invention must contain at least one component from each of classes 3,4 and 6 above. Moreover, the total amounts of material(s) in classes 1 and 2 must be less than 15wt% and therefore must be less than the amounts of components in each of classes 3 and 6. It is preferred that the number of component materials is greater than the minimum required to provide components in classes 3, 4 and 6.

Preferably the number of said component materials present in the perfume is at least five, better at least six or seven. It is also preferred that the component materials include at least one material within classes 1, 2 or 5 in addition to materials within classes 3, 4 and 6 so that the plurality of component materials contains materials allocated to at least four of the six classes. More preferably at least one component material within class 1, class 2 or class 5 is present.

It is preferred that the perfume composition contains at least 70%, even better at least 80%o of components falling within the six classes specified above. The balance of the perfume composition may comprise perfume materials which have neither an LIC value of at least 50% nor an RVR value of at least 1.1. It may also comprise materials which by reason of their chemical structure do not fall within any of the six classes, regardless of LIC or RVR value.

Examples of such materials are:

LIC RVR citronellyl acetate 18 1.00 linalyl acetate 41 0.83 benzyl acetate 10 1.04

Cedar atlas oil 24 1.08

Caryophyllene 0 0.92

Tarragon 6 1.00

Phenyl ethyl acetate 15 1.03

Undecalactone 33 1.03

Geraniol 34 1.03 phenyl acetic acid the oxime of 5-mefhyl heptan-3-one [Stemone] 13 It may be preferred that the entire perfume composition does not contain more than 20% by weight, perhaps not more than 10% by weight, of materials which either are unsaturated materials with two or more ethylenic double bonds,or are phenols with ethylenic unsaturation in substituent groups. Double unsaturated teφenes, teφene alcohols and teφene esters are often present in natural essential oils and synthetic substitutes for such oils.

More restrictively, some perfume compositions of this invention do not contain more than 20wt% of any phenols, teφenes, teφene alcohols, teφene aldehydes or teφene esters with ethylenic unsaturation.

The perfume compositions of this invention give a malodour reduction value of at least 0.25, better at least 0.5 or at least 0.7, in the Malodour Reduction Test, given in EP-A-147,191. This test comprised the steps of:

(1) selecting pieces of 100% bulked polyester sheet shirt fabric having an area of 20cm x 20cm or more;

(ii) washing the selected pieces of fabric in a front-loading drum-type washing machine with an unperfumed washing powder: whose composition (in practice the washing powder composition used in the Malodour Reduction test is not critical) is as follows:

Parts by weight

Sodium dodecylbenzene sulphonate 9 C 13- 15 alcohol 7EO 4

Sodium tripolyphosphate 33

Alkaline sodium silicate 6

Sodium carboxymethyl cellulose 1

Magnesium silicate 1 Ethylenediamine tetraacetic acid 0.2

Sodium sulphate 25

Water 10.8

(iii) rinsing the washed pieces of fabric and drying them to provide "untreated" fabric; (iv) re-washing half of the "untreated" pieces of fabric in the washing machine with unperfumed washing powder as above to which had been added 0.25% by weight of a bleach-stable perfume under test, rinsing and re-drying to provide "treated" pieces of fabric; 14 (v) inserting the "treated" and "untreated" pieces of fabric into clean polyester cotton shirts in the underarm region so that in each shirt, one underarm region received a "treated" fabric insert and the other underarm received an "untreated" fabric insert in accordance with a statistical design; (vi) placing the shirts carrying the inserts on a panel of 40 Caucasian male subjects of age within a range from 20 to 55 years (the subjects being chosen from those who develop axillary body malodour that is not unusually strong and who do not develop a stronger body malodour in one axilla compared with the other);

(vii) assessing the body malodour of the fabric inserts after a period of five hours whereby three trained female assessors scored the olfactory intensity of malodour on a 0 to 5 scale. 0 representing no odour and 5 representing very strong malodour, the strength of the odour in each instance being related for puφoses of comparison to standard odours produced by aqueous solutions of isovaleric acid at different concentrations according to the following table: Cone, of aqueous isovaleric

Score Odour Level acid (ml/1)

0 No odour 0 1 Slight 0.013

2 Definite 0.053

3 Moderate 0.22

4 Strong 0.87

5 Very Strong 3.57

(viii) calculating the average scores for both treated fabric and untreated fabric, and subtracting the average score of the treated fabric from the average score of the untreated fabric to arrive at the Malodour Reduction Value for the perfume composition.

The Malodour Reduction Value can also be expressed as a percentage of the average score for the untreated fabric.

The perfume compositions of this invention can be incoφorated into a bleach composition containing a peroxygen bleach.

Suitable peroxygen bleaching agents may be inorganic peroxygen compounds such as alkali metal perborates, percarbonates and persulphates. 15 Alternatively, organic peroxyacids can be used, such as peroxy alkanoic acids, diperoxy alkanedioic acids as disclosed in US-A-4337213 and EP-A-254311, phthalimido-perhexanoic acid and other imidoperoxycarboxylic acids as disclosed in EP-A-325288, EP-A-325289 and EP-A-435379, amidopercarboxylic acids as described in US-A-4634551 and US-A-4686063, and cationic peroxycarboxylic acids disclosed in US-A-4818426, GB-A-2270690, EP-A-485928 and EP-A-508623.

Some of these bleaching agents, especially the inorganic persalts, are best used together with a bleaching activator which enhances bleaching performance at low temperature. The activator which is most commonly used is N,N,N',N' -tetracetyl ethylene diamine. Others are tetraacetyl glycoluril, pentaacetylglucose, cholyl sulphophenyl carbonate (CSPC), acyloxybenzene sulphonates as described in EP-A-098201, amido-containing compounds described in US-A-4634551 and lactams described in WO 95/00626 and US-A-4545784.

An inorganic persalt and a bleach activator may typically be used in a weight ratio varying from 30:1 to 1:1 preferably from 10:1 to 2:1.

The peroxygen bleach may be encapsulated to improve bleach stability, even though such encapsulation may be unable to provide perfume stability by separation of bleach from perfume.

If peroxygen bleach is the main active ingredient of a composition, it may for example be present as from 20 to 90% by weight of the composition. However, it is particularly envisaged that the perfume compositions of this invention can be incoφorated into a bleaching detergent composition to be used for fabric washing.

Such a composition will typically contain from 2 to 50% of non-soap detergent active, from 5 to 80% of detergency builder, from 1 to 40% often from 3 to 30% of peroxygen bleach, and from 0 to 10% of bleach activator, these percentages all being by weight of the bleaching detergent composition.

The balance of the composition, if any, may include various ingredients known for inclusion in fabric washing detergents. A detergent composition for fabric washing may be in solid form, notably in particulate form (detergent powder) or in the form of solid articles (bars or tablets) or may be in liquid form with aqueous, non-aqueous or mixed liquid phases, with or without suspended solid.

The amount of perfume used in a bleaching composition of this invention will generally lie in a range from 0.01% to 5% by weight of the bleaching composition. 16 A preferred amount of perfume for use in many fabric washing products is from 0.1 to 1%, frequently 0.1 to 0.7% by weight, but where the product is in a concentrated form the amount of perfume may be greater, up to 1.5% or even up to 2% by weight of the product. As mentioned, the total amount of detergent-active material (surfactant) in bleaching detergent compositions for fabric washing is generally from 2 to 50% by weight. Detergent active is preferably present in a quantity of at least 5% or 10% by weight of a composition, and may well be in a quantity not exceeding 30% or 40% by weight.

Detergent-active materials may be one or more soap or non-soap anionic, nonionic, cationic, amphoteric or zwitterionic surfactants, or combinations of these. Typical of these are the alkyl benzene sulphonates, alkyl sulphonates, alkyl ether sulphates, primary alkyl sulphates, alkoxylated alcohols, alpha-sulphonates of fatty acids and of fatty acid esters, alkyl betaines, and alkyl polyglycosides all known in the detergent art.

Detergency builders are materials which function to soften hard water by solubilisation or other removal of calcium and to a lesser extent magnesium salts responsible for water hardness compounds. A particularly well known group of water soluble detergency builders are the alkali metal phosphates and condensed phosphates, especially exemplified by sodium pyrophosphate and tripolyphosphate. A further water soluble inorganic builder compound is sodium carbonate which is generally used in conjunction with a seed crystal to accelerate the precipitation of calcium carbonate. Organic detergency builders such as sodium citrate and polyacrylate can also be used.

Common insoluble inorganic detergency builders are zeolites. These are normally used jointly with a smaller quantity of a water soluble builder, especially a polycarboxylate which may be a copolymer of acrylate and maleate residues. As is well known, many detergent compositions avoid phosphate builders. The detergency builder component of a detergent composition will as mentioned, generally comprise from 5 to 80%, preferably from 5 or 10% up to 60%) by weight of the detergent composition.

A liquid composition will typically contain 5% to 40% by weight of water-soluble builder salt, partially dissolved and partially suspended in an aqueous liquid phase. Other ingredients which are customarily included in a detergent composition, although not necessarily all together, include alkaline silicate, soil release agents, anti-redeposition agents such as sodium carboxymethyl cellulose, enzymes, fabric softening 17 agents including softening clays, fluorescent brighteners, antifoam agents or conversely foam boosters and filler such as sodium sulphate.

Claims

18 CLAIMS

1. A deodorant perfume composition which is a mixture of fragrance materials with a

Malodour Reduction Value of 0.25 to 3.0 in the Malodour Reduction Test herein, and which comprises at least 55% (by weight of the perfume composition) of a plurality of component materials which: have a Lipoxidase-lnhibiting Capacity (LIC value) of at least 50% in the Lipoxidase Test herein, or have a Raoult Variance Ratio of at least 1.1 in the Mo╧åholine Test herein, ΓÇó or are named as components included in classes below;

such components each falling within and being allocated to one of six classes as follows:

Class 1 : phenolic compounds, including iso-amyl salicylate, benzyl salicylate, carvacrol, ethyl vanillin, iso-eugenol, methyl 2,4-dihydroxy-3,6-dimethyl benzoate [LRG 201] and thymol; Class 2: natural essential oils and resins containing less than 20%> (by weight of the oil or resin) of phenolic compounds;

Class 3 : aldehydes and ketones, including 6 -acetyl- 1,1,3,4,4,6-hexamethyl-tetrahydronaphthalene [Tonalid], p-t-amyl cyclohexanone, p-t-butyl-cc-mefhyl hydrocinnamic aldehyde, 2-n-heptylcyclopentanone, -iso-Methyl ionone, ╬▓-Methyl naphthyl ketone, benzyl acetone, 2,7,8-trimethyl-l-acetyl-cyclododeca-2,5,9-triene [Cyclisone] l-(l,2,8,8-tetramethyl-l,2,3,5,6,7,8,8a-octahydro-2-napthalenyl)-l-ethanone [iso E super], 2,2,7,7-tetramethyl-tricyclo[6.2.1.0¹' ⁶ ]undecan-5-one

[isolongifolanone] l-(l-isopropyl-l,3,3,6-tetramethyl-2,3-dihydro-lH-5-indenyl)-l-ethanone and l-(3-isopropyl-l,l,2,6-tetramethyl-2,3-dihydro-lH-5-indenyl)-l-ethanone

[Traseolide]; Class 4: polycyclic compounds and nitriles, including iso-butyl quinoline, coumarin,

1,3,4,6, 7, 8-Hexahydro-4,6,6, 7-8, 8-hexamethyl cyclopenta-╬│-2-benzo-pyran

[Galaxolide], 3a-methyl-dodecahydro-6,6,9a-trimethylnaphtho(2,l-b)furan, ╬▓-naphthyl methyl ether [Yara], cedryl methyl ether [Cedramber], 19 tricyclo[5.2.1.0^{2, 6}]dec-4-en-8-yl propanoate [Florocyclene], ethyl tricyclo[5.2.1.0^{2 <3}]decane-2-carboxylate [Fruitate], and 2-methyldecane nitrile [Frutonile]; Class 5: esters, including ortho-t-butyl cyclohexyl acetate, para-t-butyl cyclohexyl acetate, diethyl phthalate, nonanediol-l,3-diacetate,

Nonanolide- 1 ,4 , i-Nonyl acetate, i-Nonyl formate, phenylethyl phenyl acetate and dihydromyrcenyl formate; Class 6: alcohols and ethers, including cinnamic alcohol, dihydromyrcenol, hydroxymethylisopropylcyclohexane [Mayol], tetrahydromuguol, phenylethyl alcohol, tetrahydrolinalol, l-[(2'-t-butylcyclohexyl)oxy]-butan-2-ol

[Amber Core], l-(ethoxymethoxy)cyclododecane [Boisambrene forte], phenylethyl isoamyl ether [Anther],

2-ethyl-4-(2',2',3^,-trimethyl-cyclopent-3'-enyl)-but-2-enol [Bangalol], diphenyl oxide, 3-methyl-5-phenylpentanol [Phenoxanol] and 5-(sec-butyl)-2- (2',4'-dimethylcyclohex-3'-enyl)-5-methyl- 1 ,3-dioxane [Karanal] provided that: a) any said component which could be allocated to more than one of the above classes is allocated to the class with the lowest number; b) any component material which is present in an amount less than 0.5%╬╣ (by weight of the perfume composition) shall not be allocated to any said class; c) at least 17% (by weight of the perfume composition) of class 3 is present; d) at least 5% (by weight of the perfume composition) of class 4 is present; e) at least 20% (by weight of the perfume composition) of class 6 is present; f) no more than 15%> in total (by weight of the perfume composition) of classes 1 and 2 are present.

2. A perfume composition according to claim 1 containing at least 20% (by weight of the perfume composition) of materials in class 3 selected from: 6-acetyl- 1,1,3 ,4,4,6-hexamethyl-tetrahydronaphthalene [Tonalid] , ╬▒-iso-Methyl ionone, ╬▓-Methyl naphthyl ketone, 2,7,8-trimethyl-l-acetyl-cyclododeca-2,5,9-triene

Cyclisone], 1-(1, 2,8,8-tetramethyl-l, 2,3,5,6,7,8,8a-octahydro-2-napthalenyl)- 1 -ethanone [iso E super], 20 2,2,7,7-tetramethyl-tricyclo[6.2.1.0^{1, 6} ]undecan-5-one [isolongifolanone], l-(l-isopropyl-l,3,3,6-tetramethyl-2,3-dihydro-lH-5-indenyl)-l-ethanone and 1 -(3-isopropyl- 1,1, 2, 6-tetramethyl-2,3-dihydro-lH-5-indenyl)-l -ethanone [Traseolide].

3. A perfume composition according to claim 1 or claim 2 containing at least 10% (by weight of the perfume composition) of materials in class 4 selected from: coumarin, l,3,4,6,7,8-Hexahydro-4,6,6,7-

8,8-hexamethyl cyclopenta-╬│-2-benzo-pyran [Galaxolide], ╬▓-naphthyl methyl ether [Yara], tricyclo[5.2.1.0^{2 6}]dec-4-en-8-yl propanoate [Florocyclene], ethyl tricyclo[5.2.1.0^{2, 6}]decane-2-carboxylate [Fruitate] and 2-methyldecane nitrile

[Frutonile].

4. A perfume composition according to claim 1, claim 2 or claim 3 containing at least 20%) by weight of the perfume composition of materials in class 6 selected from: phenyl ethyl alcohol, tetrahydrolinalol, l-[(2'-t-butylcyclohexyl)oxy]-butan-2-ol [Amber Core], l-(ethoxymethoxy)cyclododecane [Boisambrene forte], 2-ethyl-4-(2',2',3'-trimethyl-cyclopent-3'-enyl)-but-2-enol [Bangalol], 3-methyl-5-phenylpentanol [Phenoxanol] and

5-(sec-butyl)-2-(2',4'-dimethylcyclohex-3'-enyl)-5-methyl-l,3-dioxane [Karanal].

5. A perfume composition according to claim 1 containing at least 8 wt% of materials in class 5.

6. A perfume composition according to any one of the preceding claims wherein the content of natural essential oils in class 2 is not more than 5% (by weight of the perfume composition).

7. A perfume composition according to any one of the preceding claims wherein the content of unsaturated materials with two or more ethylenic double bonds and of 21 phenols with ethylenic unsaturation in substituent groups does not total more than 20%) by weight of the perfume composition.

8. A perfume composition according to any one of the preceding claims wherein the

5 content of any phenols, te╧åenes, te╧åene alcohols, te╧åene aldehydes or te╧åene esters with ethylenic unsaturation does not total more than 20% by weight of the perfume composition.

9. A bleaching composition comprising from 1% to 90%o by weight of peroxygen bleach 10 and from 0.01% to 5% by weight of a perfume composition according to any one of the preceding claims.

10. A bleaching detergent composition comprising from 2 to 50%) by weight of non-soap detergent active, from 5 to 80% by weight of 15 detergency builder, from 1 to 40%) of peroxygen bleach, and and from 0.1 % to 2% by weight of a perfume composition according to any one of claims 1 to 8.

20 11. A composition according to claim 10 wherein the peroxygen bleach is an organic peroxy acid.

12. A composition according to claim 10 wherein the peroxygen bleach is an inorganic peroxygen salt and the composition contains from 1 to 10%> by weight of a bleach 25 activator.