CN1240475A - Cast melt bar compositions comprising high levels of low molecular weight polyalkylene glycols - Google Patents
Cast melt bar compositions comprising high levels of low molecular weight polyalkylene glycols Download PDFInfo
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Abstract
The present invention relates to skin cleansing bar composition in which polyalkylene glycols of very specific molecular weights are used to produce compositions which are mild, foam well and provide consumer-desired sensory profiles. A significant amount of these specific PEGs must be incorporated into the bar to deliver these desired effects. To properly process such a bar composition, the cast-melt method is the preferred technique.
Description
Invention field
The present invention relates to the skin clean bar compositions, preferably form by casting method.These bars are extremely gentle, foam is good and provide the ideal sensorial characteristics for the human consumer.
Background of invention
Personal cleansing bar shaped soap constantly develops towards the direction of gentle preparation, and the enhancing skin care effect is provided the most at last, as reducing some product of skin irritation and enhancing wetting action to greatest extent.The bar compositions that contains significant quantity skin moisten oily liquid is an ideal, and it will provide comfortable sensory effect for many human consumers.With regard to the appropriate method for preparing this kind bar compositions, founding is preferred technology.
Find that a kind of to make a large amount of economic chemical substance bar weighting agent/tackiness agent effect, that can strengthen skin mildness or wettability, improve strip soap outward appearance and help strip processing be challenging.For example, solid polyalkylene glycol (as having 2000 above molecular weight polyethylene glycol (PEG)) is effective structural agent, and they can not eliminate foam.Yet, to compare with PEG with lower molecular weight, their less skin that makes has the butyrous sensation, and this sensation is the signals with humidification to many human consumers, and they are difficult for the present invention miscible as the longer chain fatty acid soap of jelling agent.On the other hand, solid fatty acid can constitute strip effectively, but the trend of froth breaking is arranged.If paraffin with higher concentration (that is, and greater than composition total weight 25%) exist, particularly when the hydrophobicity soothing oil exists, can eliminate foam.
Among the present invention, the applicant use casting technology in the synthetic detergent bars, prepare the lower molecular weight polyalkylene glycol of suitable high density (as, have 300 to 1500 molecular weight polyethylene glycol).The interior data of external and body show, only add the hormesis that these low-molecular-weight PEG (weight ratio of polyoxyethylene glycol and anion surfactant is more than 1: 1) can obviously alleviate anion surfactant commonly used with high density.Not as molecular weight greater than 2000 solid PEG, low-molecular-weight PEG is easier to the longer chain fatty acid soap as jelling agent of the present invention miscible, so they are main components of fluxion part not in these bars.These liquid portions are easy to dissolving in use just, help strengthening skin comfort, mild action and foaming like this.Favourable part in addition is that low-molecular-weight PEG strengthens the required bubbling character of skin clean.
Therefore, use the material of high-load these lower molecular weights, the applicant can obtain to have simultaneously (1) and provide required use and processing characteristics (2) to rise to soak and the low strip product of (3) pungency.
It itself is not new using polyalkylene glycol (as polyoxyethylene glycol) in the personal cleansing bar compositions.
For example, the United States Patent (USP) 3312627 of D.Hooker has been introduced and has been contained the bar compositions of 30-70% as the polyoxyethylene glycol (PEG) of strip structural agent in the nonionic preparation that is substantially free of anionic detergent.The PEG that uses in this invention has the molecular weight more than 4000 dalton, apparently higher than the desired molecular weight of PEG (＜1500) of the present invention's use.Opposite with the present invention, described patent is used the high-molecular weight PEG of obvious higher concentration in the bar compositions total amount.And the ratio of PEG/ anion surfactant is not crucial in this patent, is the nonionic preparation because it relates to main.
The international patent application 93/07245 of F.Moran, B.O ' Briain and D.Moran (transferring the possession of in NEPHIN) is introduced the shampoo bar compositions that contains 12-20% synthetic detergent and the PEG of 70-80% molecular weight between 5000 and 10000.This working of an invention scheme comprises the softening PEG (preferably account for the 1-8% of total composition) of molecular weight between 100 and 800.Opposite with the present invention, the high molecular weight PEGs of obviously high (70-80%) is used in described patent application in the bar compositions total amount.Described patent uses lower molecular weight PEG obviously to lack than the present invention.
The common unsettled U.S. Patent application 08/594363 of applicant, it is the subsequent application of U.S. Patent application 08/213287, denomination of invention is " agent of synthesis of detergent strip and preparation thereof ", the invention people is people such as J.Chambers, has introduced to contain 10-60% synthetic surfactant and the 10-60%PEG strip product as structural agent.Employed PEG has 40 ℃ to 100 ℃ temperature of fusion scope and 1500 to 10000 molecular weight ranges.This molecular weight makes PEG at room temperature be solid.Employed PEG molecular weight requires on the molecular weight of (＜1500) in the present invention.At least 1: 1 PEG/ negatively charged ion ratio is not pointed out in the patent application of institute's reference yet, and this ratio is relevant with the enhancing mildness, is key of the present invention.
People's such as M.Massaro United States Patent (USP) 5520840 introduced a kind of 10-60% of containing synthetic surfactant, 10-60% have 40 ℃ of water-soluble structure agent to 100 ℃ of melting ranges (as, PEG) and the 1-25% water soluble starch, as the skin clean bar compositions of Star Dri 5.Employed PEG molecular weight (＞1500) is on molecular weight of the presently claimed invention.At least 1: 1 PEG/ negatively charged ion ratio is not pointed out in described patent application yet, and this ratio is relevant with the enhancing mildness, is key of the present invention.
The United States Patent (USP) 2287484 of Lundberg is introduced a kind of bar that is prepared by the molding technique of sealing, and it contains the negatively charged ion synthetic surfactant of 35%-70% and the lipid acid of 22-50%.This bar also can contain the highest 10% ethylene glycol and Diethylene Glycol as additive.The present invention finds that ethylene glycol and Diethylene Glycol are reducing to be not so good as lower molecular weight PEG (molecular weight is more than 300) effectively aspect the negatively charged ion pungency.And at least 1: 1 PEG/ negatively charged ion ratio is not pointed out in the patent application of institute's reference yet, and this ratio is relevant with the mildness enhancing, is key of the present invention.
The applicant introduces gentle bar compositions at the common pending application 08/662394 that on June 12nd, 1996 submitted to, and the fusing point that it contains 10-60% synthetic detergent, 10-50% prepares the lower molecular weight PEG (fusing point is lower than 40 ℃) of auxiliary agent in the conduct of high molecular weight PEGs more than 40 ℃ and 0.1-10%.The lower molecular weight PEG of the claimed use lower aq of this application as lubricant so that help the carrying out of extrusion.This obviously is different from technology of the present invention, and the present invention is that the lower molecular weight PEG (for example greater than composition total weight 10%) of preparation high level in bar is as wetting agent.And the weight ratio of PEG/ anion surfactant is not described in described patent application, and this proportioning is the key that the present invention reaches the skin mildness.
It is free and through the frame cleaning bar compositions of mixture, 15-65% synthetic negatively charged ion and the firm auxiliary agent of nonionic strip and the 15-55% water of neutral monocarboxylic acid that the United States Patent (USP) 5262079 and 5227086 of M.Kacher, J.Taneri, D.Quiram, D.Schmidt and M.Evans has been introduced a kind of 5-50% of containing.Form approximately by from 44 to 10000 daltonian polyoxyethylene glycol or polypropylene glycol by the molecular weight ranges of 5-50% synthetic surfactant and 0-40% for the firm auxiliary agent of described strip.Described patent do not point out or advise using molecular weight between 400 to 1500 PEG and PEG/ anion surfactant weight ratio to realize enhancing to founding processibility and mildness.And in order to obtain required strip service performance (that is, existing pasty state is hard again), the present patent application people only comprises the water of 2-10% weight in bar compositions required for protection, is starkly lower than the 15-55% water in the contrast patent.
At last, the applicant has submitted United States Patent (USP) simultaneously, and application number is 08/733036, the denomination of invention cast melt bar compositions of the impouring of low moisture content and polyvalent alcohol and water minimum proportion " but contain ".The present invention prepares by identical casting method.Yet relevant application does not relate to uses the polyalkylene glycol of high-content molecular weight between 400 and 1500, and the ratio of polyalkylene glycol and anion surfactant is at least 1: 1 concrete composition.
The present invention's general introduction
The present invention relates to bar compositions, (molecular weight is high enough to relax anionic pungency wherein to use very special molecular weight ranges, but low to the sensorial characteristics that is enough to provide required and help founding and process) aklylene glycol (as, and make the ratio of aklylene glycol and anion surfactant keep at least 1: 1 and Geng Gao polyoxyethylene glycol).This composition gentleness, rise and to soak and provide the ideal sensorial characteristics to the human consumer.
More particularly, the present invention includes:
(1) 2-35%, the synthetic anion surface active agent of preferred 10-30% composition total weight;
(2) tensio-active agent of 0-20% composition total weight is selected from both sexes, zwitter-ion or nonionogenic tenside and composition thereof; Preferably, both sexes and zwitterionics content account for the 2-15% of composition total weight;
(3) molecular weight of 10-70% composition total weight surpasses the mixture of 300 to about 1500 daltonian polyalkylene glycols or polyalkylene glycol compounds;
The weight ratio of this polyalkylene glycol and anion surfactant is at least 1: 1, preferred 2: 1 and Geng Gao;
(4) the solid structure auxiliary agent and the weighting agent of about 0-35% composition total weight are selected from the polyalkylene glycol that (i) has 2500 to 10000 molecular weight and about 55 to 65 ℃ of fusing points; (ii) preferred straight chain, preferred saturated C
8To C
24Free fatty acids; (iii) preferred straight chain, preferred saturated C
8To C
20Alkanol; (iv) water soluble starch (as, Star Dri 5);
(5) jelling agent of about 1% to 20% composition total weight; With
(6) water of about 2% to 10% composition total weight.
The accompanying drawing summary
Fig. 1 shows that the weight ratio of PEG and isethionate is more than 1: 1, and preferably at 2: 1 when above, molecular weight 400 and 400 above polyoxyethylene glycol obviously reduce the stripping quantity (be pungency less) of acyl-hydroxyethyl sulfonate to zein.
Fig. 2 shows that molecular weight is lower than at 400 o'clock, PEG or other water-soluble nonionic monomer (as, ethylene glycol, propylene glycol) do not reduce the stripping quantity of hydroxyethylsulfonic acid salt pair zein.
Fig. 3 shows that molecular weight is lower than at 400 o'clock, PEG or other water-soluble nonionic monomer (as, ethylene glycol, propylene glycol) do not reduce the stripping quantity of lauryl base ether sodium sulfate to zein.
The present invention describes in detail
The present invention relates to a kind of composition, (molecular weight is high enough to relax the excitant of anion wherein to use very special molecular weight ranges with the ratio of the aklylene glycol of minimum and anion surfactant, but low to the sense quality that is enough to provide required and be conducive to founding and process) aklylene glycol (as, polyethylene glycol), and so that this composition (1) gentleness, (2) are kept good bubbling character and (3) and are provided desirable sense quality (namely because lower molecular weight cause) to the consumer and be conducive to process.
More particularly, the present composition comprises:
(1) 2-35%, the synthetic anion surface active agent of preferred 10-30% composition total weight;
(2) surfactant of 0-20% composition total weight, be selected from both sexes, zwitterionic, non-ionic and composition thereof; Preferred both sexes and zwitterionic surfactant content are the 2-15% of composition total weight;
(3) molecular weight of 10-70% composition total weight surpasses the mixture of 300 to about 1500 daltonian PAGs or polyalkylene glycol compounds;
The weight ratio of this PAG and anion surfactant is at least 1: 1, preferred 2: 1 and Geng Gao;
(4) solid structure auxiliary agent and the filler of about 0-35% composition total weight are selected from the PAG that (i) has 2500 to 10000 molecular weight and about 55 to 65 ℃ of fusing points; (ii) preferred straight chain, preferred saturated C8To C24Free fatty; (iii) preferred straight chain, preferred saturated C8To C20Alkanol; (iv) water soluble starch (such as, maltodextrin);
(5) in addition, because the low-molecular-weight PAG of high-load is liquid or pasty state form, therefore adopt the gelling agent (hereinafter for a more detailed description) of about 1% to 20% composition total weight to strengthen the globality of bar; With
(6) water of about 2% to 10% composition total weight.
Synthetic on-soap tensio-active agent
Surfactant system of the present invention comprises at least a anion surfactant and dispensable second kind of tensio-active agent usually, and the latter is selected from both sexes/zwitterionics, nonionogenic tenside or its mixture.Preferred composition contains negatively charged ion or anion surfactant and amphoteric/zwitterionics.
Spendable anion surfactant can be aliphatic sulfonate, as uncle's alkane (as, C
8-C
22) sulfonate, uncle's alkane is (as, C
8-C
22) stilbene-4,4'-bis-(1-azo-3, 4-dihydroxy-benzene)-2,2'-disulfonate, C
8-C
22Alkene sulfonate, C
8-C
22Hydroxyl alkane sulfonate or alkyl glycerol ether sulfonate (AGS); Or aromatic sulphonate such as alkylbenzene sulfonate.
Negatively charged ion also can be that alkyl-sulphate is (as, C
12-C
18Alkyl-sulphate) or sulfated alkyl ether (comprising alkyl glycerol base ether sulfate).Wherein sulfated alkyl ether has the following formula structure:
RO(CH
2CH
2O)
nSO
3M
Wherein R is alkyl or alkenyl, has 8-18 carbon atom, preferred 12-18 carbon atom, and the mean value of n is preferably greater than 3 greater than 1.0; And M is a soluble cation, as the ammonium of sodium, potassium, ammonium or replacement.Preferred ammonium and sodium sodium lauryl ether sulphates.
Negatively charged ion also can be that alkyl sulfo succinate (comprises list and dialkyl group, as, C
6-C
22Sulfosuccinate); Alkyl or acyl taurine salt, alkyl or acyl sarcosinate, sulfosalicylic acetate, C
8-C
22Alkyl phosphate and phosphoric acid salt, alkyl phosphate and alkoxyalkyl phosphoric acid ester, acyl-lactate, C
8-C
22Monoalkyl succinate and maleate, sulfosalicylic acetate, alkyl glucoside and acyl-hydroxyethyl sulfonate.
Sulfosuccinate can be the monoalkyl sulfosuccinate with following formula:
R
1O
2CCH
2CH (SO
3M) CO
2M; With
The acid amides of following formula-MEA sulfosuccinate
R
1CONHCH
2CH
2O
2CCH
2CH(SO
3M)CO
2M
R wherein
1Scope C
8-C
22Alkyl and M are soluble cation.
Sarcosinate is represented by following formula usually:
RCON (CH
3) CH
2CO
2The M wherein scope of R is C
8-C
20Alkyl and M are soluble cation.
Taurate is represented with following formula usually:
R
2CONR
3CH
2CH
2SO
3M is R wherein
2Scope be C
8-C
20Alkyl, R
3Scope be C
1-C
4Alkyl and M are soluble cation.
Particularly preferably be C
8-C
18The acyl group isethionic acid ester.React between the mixing-in fat family lipid acid of these esters by hydroxyethylsulfonic acid an alkali metal salt and 6 to 18 carbon atoms and prepare, and its iodine number is less than 20.At least 75% (weight ratio) has 12 to 18 carbon atoms in the mixed fatty acid, and the lipid acid that is up to 25% (weight ratio) has 6 to 10 carbon atoms.
If the acyl group isethionic acid ester adds its content and is about 10% to 35% of bar compositions gross weight usually, preferably this component concentration is about 10% to 30% (weight ratio).
The acyl group isethionic acid ester can be oxyalkylated isethionic acid ester, describes in United States Patent (USP) 5393466 as people such as Ilardi, and the document is incorporated herein for reference.This compound is shown below:
Wherein R is the alkyl with 8 to 18 carbon atoms, and m is 1 to 4 integer, and X and Y are hydrogen or the alkyl with 1 to 4 carbon atom, and M ' is a univalent cation, as sodium, potassium or ammonium ion.
The content of anionic group is about 2 to 35% of bar compositions weight usually, and preferred 10 to 30%.
The operable ampholytic detergent of the present invention comprises at least one acidic group.Can be carboxyl or sulfonic group.They comprise quaternary nitrogen, thereby are the season amic acid.They generally include the alkyl or the alkenyl of 7 to 18 carbon atoms.They can meet following general formula usually:
R wherein
1Be the alkyl or the alkenyl of 7 to 18 carbon atoms;
R
2And R
3Be alkyl, hydroxyalkyl or the carboxyalkyl of 1 to 3 carbon atom independently of one another;
N is 2 to 4;
M is 0 to 1;
X is the alkylidene group of 3 carbon atoms of 1 row, can by hydroxyl replace also can not replaced by hydroxyl and
Y is-CO
2-or-SO
3-
Above suitable ampholytic detergent comprises the simple betaine of following formula in the general formula:
Acid amides betaine with following formula
Wherein m is 2 or 3.
In above-mentioned two formulas, R
1Be the alkyl or the alkenyl of 7 to 18 carbon atoms; And R
2And R
3Be alkyl, hydroxyalkyl or the carboxyalkyl of 1 to 3 carbon atom independently.R
1Specifically can be C by coconut derived
12And C
14The mixture of alkyl makes at least half, preferably 3/4 R
1Group has 10 to 14 carbon atoms.R
2And R
3Be preferably methyl.
Ampholytic detergent can also be the sulfo group betaine of following formula:
Or
Wherein m is 2 or 3, or the variant of last two formulas, wherein (CH
2)
3SO
3 -Replace by following formula:
In these structural formulas, R
1, R
2And R
3Identical with described in the acid amides betaine.
If adding its content, ampholytic detergent is generally 2% to 15% of bar compositions weight.
Although the content of other tensio-active agent (that is, non-ionic, cationic) is no more than 0.01 row 10% of bar compositions weight, also can optionally use them.
Nonionogenic tenside specifically comprises having hydrophobic group and the compound of hydrogen atoms (for example Fatty Alcohol(C12-C14 and C12-C18), acid, acid amides or alkylphenol) and the reaction product of oxyalkylene, and described oxyalkylene is an oxyethane, and is independent or mix with propylene oxide.Concrete nonionic detergent compounds is alkyl (C
6-C
22) phenol-ethylene oxide condensate, aliphatics (C
8-C
18) straight or branched primary alconol or the condensation product of secondary alcohol and oxyethane and the product for preparing by oxyethane and propylene oxide and the condensation of reacting ethylenediamine product.Other compound that is called nonionic detergent comprises long chain tertiary amine oxide compound, long chain tertiary phosphine oxide and dialkyl sulphoxide.
Non-ionic type also can be sugared acid amides, as, polysaccharide amide.Specifically, this tensio-active agent can be one of lactobiose acid amides of describing in United States Patent (USP) 5389279 (document is incorporated herein for reference) of people such as a kind of Au and as the polyhydroxy amides of people such as Letton description in United States Patent (USP) 5312954 (it is for reference that the document is introduced the application).
The example of cationic detergent is quaternary ammonium compound such as alkyl dimethyl ammonium halogenide.
Other operable tensio-active agent is at United States Patent (USP) 3723325 and the Schwartz of Parran Jr, Perry﹠amp; Be described in " tensio-active agent and the washing composition " of Berch (I and II volume), these two pieces of documents also are incorporated herein for reference.
Polyalkylene glycol
Second kind of mixture that component is polyalkylene glycol or polyalkylene glycol of the presently claimed invention, wherein the example of polyalkylene glycol is polyoxyethylene glycol or polypropylene glycol.Polyalkylene glycol must have above 300, preferably surpasses about 350 and about 1500 daltonian molecular weight.
The scope of this molecular weight is important, because molecular weight is when being lower than minimum value 300 scopes, the PEG in the bar compositions can not significantly reduce the hormesis to skin (referring to embodiment 2, Fig. 2 and 3) that is caused by anion surfactant; And molecular weight is 1500 when above, and the PEG molecule is difficult for longer chain fatty acid soap (as jelling agent) miscible.And molecular weight is 1500 when above, and PEG does not resemble provides the oiliness sensation for skin well the PEG of lower molecular weight.
Another importance of the present invention is that aklylene glycol and anionic weight ratio were at least 1: 1 and preferred 2: 1 and Geng Gao.Moreover weight ratio is lower than at 1: 1 o'clock, is difficult for feeling that mildness is (referring to embodiment 1, Fig. 1).
In a word, the mixture content of described compound or compound is 10 to 70% of a bar compositions weight.
Jelling agent
Need jelling agent in the present composition.Although be not wishing to be bound by theory,, therefore be sure of that such composition needs because high-content lower molecular weight polyalkylene glycol required for the present invention is liquid or paste form.Believe the globality that needs jelling agent to strengthen bar.
The example of jelling agent includes, but is not limited to:
(i) neutral C
8To C
25Carboxylic acid (soap), preferred neutral C
8To C
25Monocarboxylic acid (straight chain, saturated soap);
(ii) paraffinic waxes, polyethylene wax, Vaseline, lubricating grease, jelly, pyrogenic silica and/or pure aluminium silicate, urea and clay;
The example of spendable wax comprises by Whittaker, Clark﹠amp; Paraffinic waxes that Daniels, Inc. provide and the Luwax of BASF, and the MULTIWAX microcrystalline wax of Witco.Preferred wax is stearin.
In general, the content of jelling agent is 1 to 20% of composition total weight.
The content of bar wetting agent
At last, use low moisture in the bar of the present invention, that is, composition total weight 2% to (weight ratio) below 10%, preferred 2% to 8%, more preferably 3% to 7%.But remaining on, suggestion moisture can guarantee that evenly pump is taken out melts and form hard solid level when cooling.That excessive water can cause mixing is bad, viscosity is low and occur being separated when fusion, and the too soft loblolly shape liquid that is of solid that forms when cooling.
Dispensable structural promoter and weighting agent
The another kind of dispensable composition of the present invention is to use solid structure auxiliary agent and weighting agent, promptly keeps the one-piece construction of bar.The example of this structural promoter includes, but is not limited to following material:
Molecular weight is 2500 to 10000, and fusing point is about 40 ℃ to 65 ℃ polyalkylene glycol; C
8To C
20Alkanol, preferred straight chain, preferred saturated C
14To C
18Alkanol; C
8To C
25Lipid acid, preferred straight chain, preferred saturated C
14To C
22Lipid acid; And water soluble starch, as Star Dri 5.
The general content of structural promoter and weighting agent is 0% to 35% of composition weight, preferred 10% to 25% weight.
Other dispensable component
Spendable other composition is as follows in the bar of the present invention:
Also can be mixed into composition weight 0 to 30% in the bar of the present invention, preferred 1 to 25% beneficial agent.
Beneficial agent of the present invention " composition " can be simple beneficial agent composition, maybe can be the beneficial agent compound that adds by carrier.And the beneficial agent composition can be the mixture of two or more compounds, and is wherein a kind of or all have a beneficial effect.In addition, beneficial agent itself can play to be added to the carrier of other composition in the bar compositions.
Beneficial agent can be " soothing oil ", means to enter softening skin (stratum corneum) by moisturizing and reduce and keep the material of dermalaxia by delaying moisture.
Preferred softener comprises:
(a) silicone oil, natural gum and modifier thereof, as line style with the cyclic polydimethylsiloxane; Amino, alkyl, alkylaryl and aryl silicone oil;
(b) fat and oily comprises natural fat and oily, as simmondsia oil, soya-bean oil, Rice pollard oil, Lipoval A, Prunus amygdalus oil, sweet oil, sesame oil, persic oil, Viscotrol C, Oleum Cocois, ermine oil; Theobroma oil; Tallow, lard; Winterized stearin by the above-mentioned oil acquisition of hydrogenation; And synthetic list, two and Witepsol W-S 55, as tetradecanoic acid glyceryl ester and 2 ethyl hexanoic acid glyceryl ester;
(c) wax is as carnauba wax, spermaceti, beeswax, lanolin and derivative thereof;
(d) hydrophobicity plant milk extract;
(e) hydrocarbon is as whiteruss, Vaseline, Microcrystalline Wax, ceresine, squalene, pristane and mineral oil;
(f) higher fatty acid is as lauric acid, tetradecanoic acid, palmitinic acid, stearic acid, behenic acid, oleic acid, linolic acid, linolenic acid, lanoceric acid, Unimac 5680 and polyunsaturated fatty acid (PUFA);
(g) higher alcohols is as lauryl alcohol, hexadecanol, stearyl alcohol, oleyl alcohol, elm alcohol, cholesterol and 2-cetyl alcohol;
(h) ester is as Octanoic acid, hexadecyl ester, Tetradecyl lactate, lactic acid cetyl, Isopropyl myristate, Tetradecyl tetradecanoate, Wickenol 111, hexanodioic acid isopropyl ester, butyl stearate, decyl oleate, Unimac 5680 cholesteryl ester, glyceryl monostearate, distearin, Tristearoylglycerol, lactic acid alkyl ester, citric acid alkyl ester and tartrate alkyl ester;
(i) oily substantially, as the oil of peppermint, jasmine, camphor, white fir, bitter orange peel, ryu, turps, Chinese cassia tree, Citrus bergamia, citrus unshiu, calamus, pine, lavender, bay, cloves, day arhat, volatile oil extracted from eucalyptus' leaves or twigs, lemon, May star, Thymus vulgaris, lavender, rose, Sage, menthol, Terpane, Eugenol, structure rafter aldehyde, geranial, borneol, Linaool, geraniol, root of Redsepal Eveningprimrose, camphor, thymol, embroidery line tangerine (spirantol), recklessly thin He (penene), limonene and terpenoid;
(j) lipoid is as cholesterol, acyl sphingosine, sucrose ester and vacation-acyl sphingosine, as described in European patent specification 556957;
(k) VITAMIN as vitamin A and E and VITAMIN alkyl ester, comprises vitamins C alkyl ester etc.;
(l) sun-screening agent is as octyl methoxycinnamate (Parsol MCX) and butyl methoxy benzoylmethane (Parsol 1789);
(m) phosphatide; With
(n) any mixture of mentioned component.
Particularly preferred beneficial agent is a polysiloxane, and preferred polysiloxane has the above viscosity of about 10000 centipoises.Polysiloxane can be the mixture of natural gum and/or polysiloxane.An example is the polydimethylsiloxane with about 60000 centistokes.
All per-cents mentioned above are weight ratio, except as otherwise noted.
The following examples are only used for illustrational purpose, do not attempt to limit by any way scope required for protection.
The evaluation of embodiment method mildness
The preliminary pungency of using the zein dissolution test to carry out preparation is sheltered research.In one 8 ounces jar, prepare the aqueous dispersions of 30 ml of formulation.This dispersion liquid is placed in 45 ℃ the water-bath up to dissolving fully.Under the room temperature during balance, the zein powder of 1.5 grams are added in each solution and fast stirred 1 hour.Then solution is transferred in the centrifuge tube, and with about 3000 rev/mins rotating speed centrifugal 30 minutes.Separate zein, the rinsing of not stripping and in 60 ℃ vacuum oven, be dried to constant weight.Determine the stripping percentage ratio of zein through gravimetric analysis, it and pungency are proportional.The preparation of preparation (founding)
Prepare bar by fusion casting.At first, under 80-120 ℃ temperature, in 500 milliliters beaker, composition is mixed, and moisture is adjusted to about 10-15% (weight ratio).This batch product is covered completely with the prevention loss of moist, and mixed about 15 minutes.Remove lid then, make the mixture drying.Extract the sample of different time at this drying stage, and measure its moisture by Karl Fischer titration with the turbo-charging titrator.When reaching last moisture content (about 5% weight), the mixture in the flask (free-pouring liquid form) is splashed in the stick model, made it at room temperature to cool off 4 hours.After the curing, mixture forms bar in stick model.
The influence of the comparison anion surfactant-protein interaction of PEG (molecular weight＞300)/anion surfactant
In the dissolution test of zein (Fig. 1); the weight ratio of finding PEG and anion surfactant is more than 1: 1; preferably at 2: 1 when above, molecular weight can obviously reduce the stripping quantity of acyl group sodium isethionate to zein at the PEG more than 400 and 400.When following, PEG was unconspicuous to this useful stripping minimizing effect of zein to the anionic ratio of PEG/ at 1: 1.These results show, only when adding higher amount, molecular weight is more than 300 dalton, and preferably the PEG more than about 350 dalton can play the skin wetting agent, the skin irritation that causes with the interaction of minimizing tensio-active agent and skin.
PEG (MW#300) does not have the mildness enhancement to anion surfactant
Molecular weight is 300 and is lower than at 300 o'clock.The water-soluble nonionic monomer of PEG and existence (that is, ethylene glycol, propylene glycol, sorbyl alcohol and glycerine) can not obviously reduce acyl group sodium isethionate (Fig. 2) and lauryl ether (3EO) sodium sulfate (Fig. 3) stripping quantity to zein.So, PEG molecular weight value of defining (about 300) is arranged, PEG and its water-soluble monomer of being lower than this molecular weight are invalid for the skin irritation that minimizing tensio-active agent protein interaction is caused.
Embodiment 3
The strip preparation
Strip preparation 1-4 in the table 1 uses negatively charged ion acyl group sodium isethionate and lauryl ether (3EO) sodium sulfate and both sexes coconut monoethanolamide base propyl group betaine as main washing composition.Difference from prior art is that these bar compositions contain higher amount lower molecular weight PEG (molecular weight is between 400-1500) as wetting agent.In these extreme gentle bars (preparation number 1 to 4), PEG1450 and PEG1000 can impel preparation that the emulsus of enriching foam is arranged.Table 1: the bar compositions that contains higher amount lower molecular weight PEG
| Preparation number | ||||
| ??????1 | ??????2 | ??????3 | ?????4 | |
| Composition | ????wt.％ | ????wt.％ | ????wt.％ | ???wt.％ |
| The acyl group sodium isethionate | ????15.0 | ????15.0 | ????8.0 | ????10.0 |
| Lauryl ether (3EO) sodium sulfate | ????0.0 | ????0.0 | ????2.0 | ????3.0 |
| Coconut monoethanolamide base propyl group betaine | ????10.0 | ????10.0 | ????15.0 | ????12.0 |
| Sodium stearate | ????12.0 | ????15.0 | ????15.0 | ????9.0 |
| PEG1450 | ????35.5 | ????18.5 | ????40.0 | ????30.0 |
| PEG1000 | ????0.0 | ????0.0 | ????0.0 | ????12.0 |
| PEG8000 | ????15.0 | ????29.0 | ????5.0 | ????7.0 |
| Lipid acid | ????4.0 | ????4.0 | ????9.5 | ????4.5 |
| Paraffin | ????3.0 | ????3.0 | ????0.0 | ????7.0 |
| Water | ????5.5 | ????5.5 | ????5.5 | ????5.5 |
Claims (12)
1. the bar compositions of a cleaning skin, contain:
(a) the synthetic non-soap anionic surfactants of 2-35% weight;
(b) amphoteric of 0-20% weight, zwitterionic or nonionogenic tenside or its mixture;
(c) molecular weight of 10-70% weight more than 300 to about 1500 polyalkylene glycol; (c) with (a) weight ratio greater than 1: 1;
(d) about more than 1% to the jelling agent of 20% weight; With
(e) water below 2% to 10% weight.
2. the composition of claim 1 (d), wherein jelling agent is selected from C
8To C
25Neutral carboxylic acid (soap), paraffinic waxes, polyethylene wax, stearin, Vaseline, lubricating grease, jelly, pyrogenic silica, pure aluminium silicate, urea, clay and composition thereof.
3. the composition of claim 1 wherein comprises the solid structure agent and the weighting agent of 0% to 35% weight, selects white C
8To C
25Lipid acid, C
8To C
20Alkanol, water soluble starch (that is Star Dri 5), molecular weight are polyalkylene glycol of 2500 to 10000 and composition thereof.
4. the composition of claim 1 (c), wherein polyalkylene glycol (1 (c)) and the weight ratio of anion surfactant (1 (a)) were greater than 2: 1.
5. the composition of claim 1 (a), wherein the content of synthetic non-soap anionic surfactants is 10% to 30% of composition total weight.
6. the composition of claim 1 (b), wherein the content of amphoteric and zwitterionic tensio-active agent is 2% to 15% of composition total weight.
7. the composition of claim 1 (c), wherein the lower molecular weight polyalkylene glycol has following structural:
R wherein
1=H, C
1To C
4Alkyl;
R
2=H, CH
3And
N is greater than 6 and less than 35.
8. the composition of claim 2, wherein neutral lipid acid (soap) is straight chain, saturated C
12-C
22The neutral monocarboxylic acid.
9. the composition of claim 3, wherein structural agent is C
8To C
25Carboxylic acid lipid acid, and this fatty acid content accounts for the 5%-25% of composition total weight.
10. the composition of claim 3, wherein structural agent is a lipid acid, and this lipid acid is the saturated C of straight chain
12-C
22Monocarboxylic acid.
11. the composition of claim 3, wherein alkanol is a hexadecanol.
12. the composition of claim 1 (c), wherein the molecular weight of polyalkylene glycol is to about 1500 dalton more than 350.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97180670 CN1240475A (en) | 1996-10-16 | 1997-10-01 | Cast melt bar compositions comprising high levels of low molecular weight polyalkylene glycols |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/733,035 | 1996-10-16 | ||
| CN 97180670 CN1240475A (en) | 1996-10-16 | 1997-10-01 | Cast melt bar compositions comprising high levels of low molecular weight polyalkylene glycols |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1240475A true CN1240475A (en) | 2000-01-05 |
Family
ID=5177802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97180670 Pending CN1240475A (en) | 1996-10-16 | 1997-10-01 | Cast melt bar compositions comprising high levels of low molecular weight polyalkylene glycols |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1240475A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106544157A (en) * | 2016-11-02 | 2017-03-29 | 广州精点高分子材料制品有限公司 | A kind of beauty facial soap and preparation method thereof |
-
1997
- 1997-10-01 CN CN 97180670 patent/CN1240475A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106544157A (en) * | 2016-11-02 | 2017-03-29 | 广州精点高分子材料制品有限公司 | A kind of beauty facial soap and preparation method thereof |
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