Thermo-sensitive partially degalactosylated xyloglucan and its use for cosmetics applications
A thermo-sensitive partially degalactosylated xyloglucan with a tailored monosaccharide composition and texture transition temperature range addresses the challenge of high sol-gel transformation temperatures in existing xyloglucans, enabling effective cosmetic applications by facilitating a sol-gel transition at skin temperature.
Patent Information
- Application Number
- PCT/CN2024/137106
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-12-06
- Filing Date
- 2024-12-05
- Publication Date
- 2025-06-12
AI Technical Summary
Existing thermo-sensitive xyloglucans have a high sol-gel transformation temperature that is not perceivable at skin temperature, limiting their application in cosmetics.
A thermo-sensitive partially degalactosylated xyloglucan with a specific monosaccharide composition (54.5-68% glucose, 25-38% xylose, 7-13.3% galactose) and a texture transition temperature range of 5-40°C, allowing for perceivable thermo-sensitive behavior at skin temperature.
The modified xyloglucan exhibits a sol-gel transition within the range of human skin temperature, enhancing its potential for use in cosmetic applications as a delivery system for active ingredients.
Smart Images

Figure PCTCN2024137106-FTAPPB-I100001 
Figure PCTCN2024137106-FTAPPB-I100002 
Figure PCTCN2024137106-FTAPPB-I100003
Abstract
Description
THERMO-SENSITIVE PARTIALLY DEGALACTOSYLATED XYLOGLUCAN AND ITS USE FOR COSMETICS APPLICATIONSField of the Invention
[0001] The present invention relates to a thermo-sensitive partially degalactosylated xyloglucan, and its use for cosmetics applications.Background
[0002] Thermo-sensitive polymer gel gives novel texture and format in personal care application, especially when the sol-gel transition occurs at around skin temperature. Considering the demand on natural based ingredient in personal care industry, some of natural polysaccharides are reported to give thermo-sensitive behavior. Degalactosylated xyloglucan is one of them that could be with promising potential in personal care.
[0003] Xyloglucan is a hemicellulose with backbone of glucose units and branched structure of xylose and galactose units. It is reported that through enzymatic reaction with beta-galactosidase, side groups of galactoses are partially removed and then the modified polysaccharide shows sol to gel transformation upon heating to certain temperature.
[0004] WO2014154806 A1 discloses a process to prepare a thermo-sensitive xyloglucan and investi-gates its application in oil field. The thermo-sensitive xyloglucan obtained in WO2014154806 A1 has a high sol-gel transformation temperature that is hardly perceivable when applied on skin.
[0005] However, there exist a few limitations that block application in cosmetics, when the sol-gel transition temperature is not at the range of skin temperature.Summary of the Invention
[0006] It is an object of the present invention to provide a thermo-sensitive partially degalactosylated xyloglucan, which shows a perceivable thermo-sensitive behavior in the range of skin tempera-ture.
[0007] It has been found that the object of the present invention can be achieved by a thermo-sensitive partially degalactosylated xyloglucan, which comprises from 54.5 to 68%by weight of glucose units, from 25 to 38%by weight of xylose units, and from 7 to 13.3%by weight of galactose units, based on the weight of the thermo-sensitive partially degalactosylated xyloglucan, where-in the thermo-sensitive partially degalactosylated xyloglucan has a texture transition tempera-ture of from 5 to 40℃.
[0008] Particularly, the present invention relates to following aspects.
[0009] In a first aspect, the present invention provides a thermo-sensitive partially degalactosylated xyloglucan, which comprises from 54.5 to 68%by weight of glucose units, from 25 to 38%by weight of xylose units, and from 7 to 13.3%by weight of galactose units, based on the weight of the thermo-sensitive partially degalactosylated xyloglucan, wherein the thermo-sensitive partially degalactosylated xyloglucan has a texture transition temperature of from 5 to 40℃.
[0010] In a second aspect, the present invention provides a thermo-sensitive composition comprising the thermo-sensitive partially degalactosylated xyloglucan according to the present invention.
[0011] In a third aspect, the present invention provides the use of the thermo-sensitive partially degalactosylated xyloglucan according to the invention as a delivery system for cosmetically active ingredients.Detailed Description of the Invention
[0012] The present invention now will be described in details hereinafter. It is to be understood that the present invention may be embodied in many different ways and shall not be construed as limited to the embodiments set forth herein. Unless mentioned otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
[0013] As used herein, the singular forms “a” , “an” , and “the” include plural referents unless the context clearly dictates otherwise.
[0014] As used herein, the terms "comprise" , "comprising" , etc. are used interchangeably with "contain" , "containing" , etc. and are to be interpreted in a non-limiting, open manner. That is, e.g., further components or elements may be present. The expressions “consists of” or “consists essentially of”or cognates may be embraced within “comprises” or cognates.
[0015] The first aspect of the present invention provides a thermo-sensitive partially degalactosylated xyloglucan, which comprises from 54.5 to 68%by weight of glucose units, from 25 to 38%by weight of xylose units, and from 7 to 13.3%by weight of galactose units, based on the weight of the thermo-sensitive partially degalactosylated xyloglucan, wherein the thermo-sensitive partially degalactosylated xyloglucan has a texture transition temperature of from 5 to 40℃.
[0016] In some embodiments, the thermo-sensitive partially degalactosylated xyloglucan according to the present invention comprises preferably from 54.8 to 65%by weight, more preferably from 55 to 62%by weight of glucose units, preferably from 28 to 35%by weight, more preferably from 29 to 33%by weight of xylose units, and preferably from 8 to 13%by weight, more preferably from 9 to 12.8%by weight of galactose units, based on the weight of the thermo-sensitive partially degalactosylated xyloglucan.
[0017] In some embodiments, the thermo-sensitive partially degalactosylated xyloglucan according to the present invention has a texture transition temperature of preferably from 8 to 30℃, for example 10℃, 12℃, 15℃, 18℃, 20℃, 22℃, 25℃, 28℃, more preferably from 10 to 20℃.
[0018] In some embodiments, the thermo-sensitive partially degalactosylated xyloglucan according to the present invention has a weight average molecular weight (Mw) of from 200,000 to 10,000,000, preferably from 500,000 to 5,000,000, more preferably from 1,000,000 to 2,000,000, as determined by conventional methods, for example by Gel Permeation Chromatography (GPC) . In some embodiments, the thermo-sensitive partially degalactosylated xyloglucan according to the present invention has a number average molecular weight (Mn) of from 100,000 to 5,000,000, preferably from 200,000 to 2,000,000, more preferably from 400,000 to 1,000,000, as determined by conventional methods, for example by GPC. In some embodiments, the thermo-sensitive partially degalactosylated xyloglucan according to the present invention has a polydiseperse index (PDI) of from 1.2 to 4, preferably from 2 to 3.8, more preferably from 2.5 to 3.5.
[0019] Contaminants may negatively affect the thermogelation properties of the partially degalactosylated xyloglucan and, thus, the partially degalactosylated xyloglucan has a purity of at least 80 %by weight, preferably at least 90 %, more preferably at least 95 %, most preferably at least 98 %, based on the total weight of the partially degalactosylated xyloglucan.
[0020] The thermo-sensitive partially degalactosylated xyloglucan according to the present invention can be prepared by a process, which comprises the steps of (a) providing an aqueous xyloglucan preparation, and (b) contacting said aqueous xyloglucan preparation with an enzyme preparation comprising β-galactosidase being capable of removing galactose from xyloglucan.
[0021] In some embodiments, the process comprises at least the two steps (a) and (b) . In step (a) of the process, an aqueous xyloglucan preparation is provided. Said preparation can comprise xyloglucan isolated from one species; or mixtures of two, three, four or more xyloglucans isolated from different species.
[0022] Xyloglucans are widespread in nature. They belong to a group of polysaccharides typically referred to as hemicelluloses and can be found in primary cell walls of different plants, such as for example plants belonging to the class dicotyledons and plants belonging to the sub-class non-graminacious monocotyledons.
[0023] A few among these plants (all of which are dicotyledons) use xyloglucan also as a carbohydrate reserve instead of the most common carbohydrate reserve starch. Seeds of these plants have thick cell walls containing vast quantities of xyloglucan.
[0024] Examples of said plants are flowering plants of the genus Nasturtium, such as Nasturtium africanum, Nasturtium floridanum, Nasturtium gambelii, Nasturtium microphyllum and Nasturtium officinale; flowering plants of the genus Impatiens, such as Impatiens balfourii, Impatiens balsamina, Impatiens capensis, Impatiens edgeworthii, Impatiens glandulifera, Impatiens hians, Impatiens marianae, Impatiens niamniamensis, Impatiens noli-tangere, Impatiens parviflora Impatiens platypetala, Impatiens repens; flowering plants of the genus Annonas, such as Annona amambayensis, Annona acuminata, Annona ambotay, Annona asplundiana, Annona atabapensis, Annona bullata, Annona biflora, Annona bicolor, Annona brasililensis, Annona cacans, Annona calophylla, Annona campestris, Annona cherimola, Annona chrysophylla, Annona pubescens, Annona tripetala, Annona conica, Annona coriacea, Annona cornifolia, Annona crassiflora, Annona cristalensis, Annona crotonifolia, Annona deceptrix, Annona deminuta, Annona dioica, Annona diversifolia, Annona dolabripetala, Annona dolichophylla, Annona echinata, Annona ecuadorensis, Annona ekmanii, Annona excellens, Annona glabra, Annona palustris, Annona glaucophylla, Annona haematantha, Annona hayesii, Annona hypoglauca, Annona hystricoides, Annona jahnii, Annona jamaicensis, Annona longiflora, Annona lutescens, Annona macrocalyx, Annona malmeana, Annona manabiensis, Annona microcarpa, Annona montana, Annona marcgravii, Annona monticola, Annona muricata, Annona macrocarpa, Annona nitida, Annona nutans, Annona oligocarpa, Annona paludosa, Annona paraguayensis, Annona phaeoclados, Annona praetermissa, Annona purpurea, Annona pygmaea, Annona reticulata, Annona salzmannii, Annona scleroderma, Annona senegalensis, Annona sericea, Annona spinescens, Annona spraguei, Annona squamosa, Annona testudinea, Annona tomentosa, Annona trunciflora and trees of the genus Tamarindus such as Tamarindus indica.
[0025] Xyloglucan from seeds of one of these plant genuses mentioned above is hereinafter referred to as seed xyloglucan.
[0026] Xyloglucans comprise a backbone consisting essentially of 1, 4-linked β-D-glucopyranose residues like cellulose. Said backbone is hereinafter referred to as xyloglucan backbone. The 1, 4-linked β-D-glucopyranose residues of the xyloglucan backbone are either substituted or unsubstituted. The 1, 4-linked β-D-glucopyranose residue may be substituted by 1, 6-linked α-D-xylopyranose residue which themselves may be further substituted by one or two 1, 2-linked β-D-galactopyranose residues or, more rarely, one or two α-L-arabinofuranose residues. Furthermore, said 1, 2-linked β-D-galactopyranose residue may themselves be further substituted by a 1, 2-linked L-fucopyranose residue.
[0027] It is known to the person skilled in the art that xyloglucans may comprise traces of other pyranose residues, furanose residues and the like besides the ones mentioned above. Thus, the expression 'consisting essentially of" means that the xyloglucan backbone consists of more than 90 %, preferably more than 95 %, even more preferred more than 98 %, often more than 99 %by weight of the 1, 4-linked β-D-glucopyranose residues.
[0028] More details about xyloglucan structures and methods of structure determination can be found in S.F. Fry. J. Expt. Botany 1989, 40, 1-11 ; A. Mishra et al., J. Mater. Chem. 2009, 19, 8528-8536; W. York et al., Carbohydr. Res. 1990, 200, 9-31; Hoffman et al., Carbohydr. Res. 2005, 340, 1826-1840; W. York et al., Carbohydr. Res. 1996, 285, 98-128; and the literature cited therein.
[0029] Various attempts have been made to isolate xyloglucan from plant sources. Most of these attempts include the steps of first crushing or pulverizing the plant parts containing xyloglucan, and then treating the crushed or pulverized plant parts with air, water, or an organic solvent. Depending on the isolation procedure and the xyloglucan source, the so obtained xyloglucan may still have as main contaminations of from 0 to 40 %by weight of proteins, of from 0 to 20 %by weight of polysaccharides (which are different from xyloglucan) , and 0 to 25 %by weight of fats.
[0030] Details about the isolation of xyloglucans and their purities can be found, for example, in Y. Kato et al.; Agricultural and Biological Chemistry 1981, 45, 2745-2753; J. -P. Joseleau et al., Plant Physiology, 1984, 74, 694-700; T. Hayashi et al., Plant and Cell Physiology, 1980, 21, 1405-1418; P. S. Rao, H. C. Srivastava, in R L Whistler (ed) , Industrial Gums, 2nd ed., Academic Press, New York, 1973, 369-411; G. Sawr et al., J. Biol. Chem. 1947, 172, 501; US 4, 895, 938; and the literature cited therein.
[0031] Preferably, the above process is conducted with an aqueous xyloglucan preparation, wherein at least one xyloglucan is a xyloglucan isolated from seeds of one of the genuses selected from the group consisting of Nasturtium, Impatiens, Annona and Tamarindus. More preferably, the aqueous xyloglucan preparation comprises one or more xyloglucans isolated from seeds of one of the species selected from the group consisting of Tamarindus indica, Annona squamosa and Annona cherimola. More preferably, the aqueous xyloglucan preparation comprises xyloglucan isolated from seeds of the species Tamarindus indica. Said xyloglucan is herein referred to as tamarind xyloglucan.
[0032] In a particular embodiment of the present invention, the aqueous xyloglucan preparation comprises tamarind xyloglucan obtained by at least one extraction step and at least one solid-liquid separation step from commercially available tamarind seed powders or tamarind seed flakes. Some suppliers for tamarind powders or flakes are shown in Table 1.
[0033] Table 1
[0034] Frequently, tamarind powders or flakes comprise around 60 to 80 %by weight of tamarind xyloglucan and 20 to 40 %by weight of fats, proteins, polysaccharides (which are different from xyloglucan) and the like, based on the total weight of said powders or flakes. Said powders or flakes typically have wide particle size distributions containing also particles being larger than 50 μm as well as particles being smaller than 1 μm. Especially the particles being larger than 50 μm are frequently poorly water-soluble and therefore dissolve very inadequately resulting in an aqueous suspension. Therefore, said powders or flakes are first extracted, and then, the still remaining insoluble particles are separated off in a solid-liquid separation step. For the extraction step, an aqueous suspension comprising between 0.5 and 5.0 %, preferably between 1.0 and 4.0 %, more preferred between 1.5 and 3.0 %by weight of tamarind seed powders or tamarind seed flakes based on the total weight of the aqueous suspension is used. The extraction step is preferably carried out at temperatures of from 50 to 100 ℃, more preferably of from 80 to 100 ℃, most preferably of from 90 to 100 ℃ at ambient pressure. After an extraction time of around 0.5 to 8 h, most of the suspended particles are dissolved resulting in an aqueous suspension, wherein most of the xyloglucan of said powders or flakes is dissolved. In the solid-liquid separation step, the aqueous suspension is separated into a solid fraction and a liquid fraction. Preferably, this step involves centrifugation and / or filtration of said aqueous suspension. After separation, the solid fraction is removed and the liquid fraction is either directly used in the process of the present invention or stored. Said liquid fraction comprises between 0.3 and 4.0 %, preferably between 0.7 and 3.2 %, more preferred between 1.0 and 2.4 %by weight of tamarind xyloglucan based on the total weight of the liquid fraction. Optionally, said liquid fraction is further subjected to evaporation and drying. The drying may involve spray-drying or freeze-drying.
[0035] The aqueous xyloglucan preparation comprises at least the xyloglucan as defined above and water.
[0036] The aqueous xyloglucan preparation comprises preferably from 0.1 to 10.0 %by weight, more preferably from 0.5 to 5.0 %by weight, most preferably from 1.0 to 3.0 %by weight of xyloglucan as defined above based on the total weight of the aqueous xyloglucan preparation.
[0037] Preferably, the aqueous xyloglucan preparation comprises one or more additives. Among these additives are not only buffers, such as for example, sodium citrate, sodium phosphate and / or ammonium sulfate; but also biocides, such as formaldehyde glutardialdehyde and the like.
[0038] Where used, such biocides usually have concentrations of from 0.001 %to 0.100 %by weight based on the total weight of the aqueous xyloglucan preparation. Where used, such buffers have typically concentrations of from 0.1 to 20.0 %by weight based on the total weight of the aqueous xyloglucan preparation.
[0039] The aqueous xyloglucan preparation may comprise one or more water soluble organic solvents, like for example, alcohols, glycols or polyols. If any soluble organic solvent is present, its concentration is typically between 0.1 and 50 %by weight based on the total weight of the aqueous xyloglucan preparation. Preferably, the aqueous xyloglucan preparation does not comprise water soluble organic solvents. The aqueous xyloglucan preparation has preferably a pH value of from 3 to 8, more preferably of from 4.5 to 7.5.
[0040] The aqueous xyloglucan preparation is provided by mixing water with the xyloglucan as defined above, and optionally one or more further additives and / or one or more water soluble organic solvents, as defined above, in every order. Preferably, the aqueous xyloglucan preparation is provided by mixing water with a biocide and subsequently adding the xyloglucan as defined above. Optionally, the aqueous xyloglucan preparation can be warmed up to between 25 and 75 ℃, preferably to between 40 and 60 ℃ prior to use.
[0041] In step (b) of the above process, the aqueous xyloglucan preparation is contacted with an enzyme preparation comprising β-galactosidase being capable of removing galactose from xyloglucan.
[0042] As regards the selection of suitable β-galactosidases, the main emphasis is on the β-galactosidase activity. Thus, in general, all kinds of β-galactosidases can be used as long as they are capable of removing galactose from xyloglucan. Whether a specific β-galactosidase is capable of removing galactose from xyloglucan can be determined by standard methods. Such methods are, for example, described in X. Zhang, H. Bremer, H., J. Biol. Chem. 1995, 270, 11181-11189 and the literature cited therein, or in the SIGMA quality control test procedure 'Enzymatic assay of beta-galactosidase' which is available from Sigma-Aldrich.
[0043] Suitable β-galactosidases being capable of removing galactose from xyloglucan are, in general, all kinds of β-galactosidases (β-D-galactoside galactohydrolases, E.C. 3.2.1.23) . Such β-galactosidases are, for example, β-galactosidases isolated from fungi likeTrichoderma reesei, Kluyveromyces lactis, Penicillium sp., Aspergillus oryzae, Aspergillus niger, Aspergillus aculeatus, Aspergillus awamori, Aspergillus carbonarius, Aspergillus japonicus, Aspergillus flavus, Kluyveromyces marxianus, Lactobacillus sp., Neurospora crassa, Rhizopus oryzae, Saccharomyces sp., or Saccharomyces sp.; β-galactosidases isolated from bacteria like Caulobacter crescentus, Bacillus circulans, Escherichia coli, Bacteroides fragilis, arthrobacter sp., Thermus thermophiles, Alley clobacillus acidocaldarius, Bifidobacterium sp., Geobacillus stearothermophilus, Pseudomonas sp., Saccharopolyspora rectivirgula, or Streptococcus sp.; β-galactosidases isolated from archaea like Sulfolobus solfataricus; β-galactosidases isolated from animals like Mus musculus. However, homologues or variants of the β-galactosidases isolated from the above mentioned sources are also within the scope of the present invention.
[0044] Preferably, the β-galactosidase being capable of removing galactose from xyloglucan is selected from the group consisting of β-galactosidases isolated from the fungi Trichoderma reesei, Kluyveromyces lactis, Penicillium sp., Aspergillus oryzae, Aspergillus niger, Aspergillus aculeatus, Aspergillus awamori, Aspergillus carbonarius, Aspergillus japonicus, Aspergillus flavus, Kluyveromyces marxianus, Lactobacillus sp., Neurospora crassa, Rhizopus oryzae, Saccharomyces sp., or Saccharomyces sp.; β-galactosidases isolated from the bacteria Caulobacter crescentus, Bacillus circulans, Escherichia coli, Bacteroides frag His, arthrobacter sp., Thermus thermophiles, Alley clobacillus acidocaldarius, Bifidobacterium sp., Geobacillus stearothermophilus, Pseudomonas sp., Saccharopolyspora rectivirgula, or Streptococcus sp., and homologues or variants thereof.
[0045] More preferably, the β-galactosidase being capable of removing galactose from xyloglucan is a β-galactosidase isolated from Aspergillus oryzae, Aspergillus niger, Aspergillus aculeatus, Aspergillus awamori, Aspergillus carbonarius, Aspergillus japonicus, Aspergillus flavus, or a homologue or variant thereof.
[0046] In a particularly preferred embodiment of the present invention, the β-galactosidase being capable of removing galactose from xyloglucan is the β-galactosidase isolated from Aspergillus oryzae, or homologues or variants thereof. The amount of β-galactosidase used in the above process is difficult to determine in absolute terms (e.g. grams) , as its purity may vary. Instead, the amount is given in terms of the β-D-galactosidase activity. The physical unit of activity is unit (U) . One unit (1.0 U) is herein defined to be the amount of β-galactosidase that catalyses the hydrolysis of 1 micromole of o-nitrophenyl β-D-galactoside to o-nitrophenol and D-galactose per minute at pH 6.0 at 37 ℃. The β-D-galactosidase activities mentioned herein have been determined according to SIGMA quality control test procedure 'Enzymatic assay of beta-galactosidase' .
[0047] The quantity of β-galactosidase is preferably set to an amount of at least 500 U per g xyloglucan, more preferably set to an amount of at least 750 U per g xyloglucan, even more preferably set to an amount of at least 1000 U per g xyloglucan, most preferably set to an amount of at least 1500 U per g xyloglucan.
[0048] In a particularly preferred embodiment of the present invention, the enzyme preparation comprising β-galactosidase is essentially free of contaminants showing cellulase activity. β-galactosidases themselves do not degrade the xyloglucan backbone. However, β-galactosidases are generally isolated from sources that also contain endoglucanases (EC 3.2.1.4) , cellobiohydrolases (EC 3.2.1.91) and / or other enzymes, capable of hydrolyzing cellulose polymers to smaller oligosaccharides, cellobiose and / or glucose.
[0049] According to the present invention, the enzyme preparation comprising β-galactosidase is deemed to be essentially free of contaminants showing cellulase activity, if it has a cellulase activity below 2 U / g. Preferably, the enzyme preparation comprising β-galactosidase has a cellulase activity below 2 U / g. The specific cellulase activity is more preferably below 1 U / g and most preferably below 0.1 U / g.
[0050] The term 'cellulase activity' used herein refers to enzyme preparations or solutions containing endoglucanases (EC 3.2.1 . 4) , cellobiohydrolases (EC 3.2.1.91) and / or other enzymes capable of hydrolyzing cellulose polymers to smaller oligosaccharides, cellobiose and / or glucose. A person skilled in the art is familiar with measurement methods of cellulase activity. Measurement methods of cellulase activity have been reviewed several times (see, for example, 'Determination methods of cellulase activity' T. Shuangqi et al., African Journal of Biotechnology 2011, 10, 7122-7125; 'Cellulase activities in biomass conversion: Measurement methods and comparison' M. Dashtban et al, Critical Reviews in Biotechnology 2010, 1-8) .
[0051] The values of the cellulase activity mentioned herein have been determined according to the azo-xyloglucan assay. One unit (1.0 U) is herein defined to be the amount of enzymes that will catalyse the hydrolysis of 1 micromole of azo xyloglucan to low molecular weight fragments per minute. Said assay is specific for endo-1, 4-β-D-glucanase activity present in cellulase preparations. On incubation of azo xyloglucan with cellulase, said azo xyloglucan is depolymerized by an endomechanism to produce low-molecular weight fragments. After incubation the reaction is stopped by adding methanol. Then, high-molecular weight fragments are removed by centrifugation whereas low-molecular weight fragments remain in the supernatant solution. Said supernatant solution is poured into a spectrophotometer cuvette and the absorbance of blank and low-molecular weight fragment containing supernatant solution is measured at 590 nm. Endo-1, 4-β-D-glucanase activity is determined by reference to a standard curve to convert absorbance to cellulase activity.
[0052] The aqueous xyloglucan preparation as defined above can be contacted with the enzyme preparation comprising β-galactosidase as defined above in every suitable way. For example, the β-galactosidase can be added in the form of a solid to the aqueous xyloglucan preparation. Alternatively, the β-galactosidase is first suspended or dissolved in water and subsequently added to the aqueous xyloglucan preparation in the form of an aqueous suspension or aqueous solution comprising the β-galactosidase. Said aqueous suspension or aqueous solution can comprise besides water and β-galactosidase also one or more additives, one or more water soluble organic solvents, and the like. Suitable are the same additives and water soluble organic solvents mentioned above with respect to the aqueous xyloglucan preparation. The aqueous suspension or aqueous solution comprising the β-galactosidase has preferably a pH value of from 3 to 8, more preferably of from 4.5 to 7.5. In another alternative, the aqueous xyloglucan preparation as defined above is added to the aqueous suspension or aqueous solution comprising the β-galactosidase. Thereby, the aqueous suspension or aqueous solution comprising the β-galactosidase is preferably preheated to a temperature of between 30 and 70 ℃, more preferably to a temperature of between 40 and 60 ℃. The aqueous xyloglucan preparation as defined above can be contacted with the enzyme preparation comprising β-galactosidase as defined above for 1 to 40 hours (hr) , preferably 2 to 36 hours (hr) , more preferably 2.5 to 30 hours (hr) , most preferably 3 to 26 hours (hr) .
[0053] Subsequently, said aqueous suspension is subjected to filtration, centrifugation and the like to remove the supernatant aqueous solution. The gel type precipitate obtained as filter cake, sediment and the like can be dried and optionally grinded to receive the partially degalactosylated xyloglucan as defined above.
[0054] In a preferred embodiment of the present invention, said gel type precipitate is washed at least one time with an organic solvent, such as for example, acetone, ethanol, methanol, isopropanol or n-butanol. Then, the amorphous precipitate obtained is separated from the organic solvent, dried, and optionally grinded to receive the partially degalactosylated xyloglucan as defined above having a purity of least 90 %by weight based on the total weight of the partially degalactosylated xyloglucan.
[0055] The production of enzyme preparations comprising β-galactosidaseas defined above can be carried out by the known methods, for example as described in WO2014154806 A1.
[0056] In a second aspect, the present invention provides a thermo-sensitive composition comprising the thermo-sensitive partially degalactosylated xyloglucan according to the present invention.
[0057] In some embodiments, the thermo-sensitive composition according to the present invention further comprises at least one additional component selected from the group consisting of ester or alkane-based emollient, emulsifier, thickeners, preservatives, perfume oils, active ingredients, and benefit agents.
[0058] Preferably, the thermo-sensitive composition according to the invention can comprise said at least one additional component in an amount of from 0.1 to 30%by weight, preferably from 0.5 to 25%by weight, more preferably from 1 to 20%by weight, most preferably from 2 to 15%by weight, especially from 3 to 8%by weight, based the total weight of the thermo-sensitive composition.
[0059] Oil component or emollient
[0060] In the context of the present invention, the thermo-sensitive composition comprises at least one oil component or emollient.
[0061] The term “emollient” used herein refers to a material useful for the prevention or relief of dryness, as well as for the protection of the skin.
[0062] The oil component / emollient may be selected from the group consisting of oils of animal or plant origin, synthetic glycerides, fatty esters, fatty alcohols and aliphatic hydrocarbons. These materials may be volatile or non-volatile. Suitable oil may be selected from aliphatic hydrocarbons, plant oils, fatty alcohols, esters of fatty alcohols and / or fatty acids other than animal or plant oils and synthetic glycerides, or mixtures thereof. Particularly suitable oil may be selected from the group consisting of plant oils, esters of fatty alcohols, and mixtures thereof.
[0063] Suitable plant oils for use in the cosmetic composition of the present invention may nonexclusively include linseed oil, camellia oil, sunflower oil, apricot oil, hazelnut oil, vegetable squalane oil, sasanqua oil, grapeseed oil, peanut oil, coconut oil, palm kernel oil, soybean oil, macadamia nut oil, avocado oil, safflower oil, sweet almond oil, apricot oil, corn oil, jojoba oil, olive oil, sesame oil, palm oil, eucalyptus oil, rosemary oil, lavender oil, pine oil, thyme oil, mint oil, cardamom oil, orange-blossom oil, bran oil, rice oil, rapeseed oil, castor oil, and mixtures thereof.
[0064] Suitable animal oils for use in the cosmetic composition of the present invention may nonexclusively include squalene, perhydrosqualene, squalane and mixtures thereof.
[0065] Suitable fatty esters or esters of fatty alcohols for use in the cosmetic composition of the present invention may include fatty acid polyglycerides for example diglyceride, triglycerides, preferably triglyceryl esters of saturated and / or unsaturated, branched and / or unbranched alkanecarboxylic acids with a chain length of from 6 to 24, in particular 6 to 18 carbon atoms more preferably triethylhexanoin and caprylic capric triglyceride, dialkyl carbonate such as dioctyl carbonate and dicaprylyl carbonate, diisopropyl sebacate, ethyl laurate, butyl laurate, hexyl laurate, isohexyl laurate, isopropyl laurate, methyl myristate, ethyl myristate, butyl myristate, isobutyl myristate, isopropyl myritate, 2-octyldodecyl myristate, 2-ethylhexyl monococoate (or octyl monococoate) , ethyl palmitate, isopropyl palmitate, isobutyl palmitate, 2-ethylhexyl palmitate (or octyl palmitate) , butyl stearate, isopropyl stearate, isobutyl stearate, isocetyl stearate, isosteary isostearate, isopropyl isostearate, 2-ethylhexyl stearate (or octyl stearate) , decyl oleate, isononyl isononanoate, tridecyl neopentanoate, isocetyl neopentanoate, isostearyl neopentanoate, octyldodecyl neopentanoate and isoarachidyl neopentanoate, and mixtures thereof. Exemplary esters include, but are not limited to, isopropyl isostearate, hexyl laurate, isohexyl laurate, isohexyl palmitate, isopropyl palmitate, decyl oleate, isodecyl oleate, hexadecyl stearate, decyl stearate, isopropyl isostearate, dihexyldecyl adipate, lauryl lactate, myristyl lactate, cetyl lactate, oleyl stearate, oleyl oleate, oleyl myristate, lauryl acetate, cetyl propionate, and oleyl adipate.
[0066] Other esters suitable for use in the personal care composition include di-and tri-alkyl and alkenyl esters of carboxylic acids, such as esters of C4 to C8 dicarboxylic acids (e.g. C1 to C22 esters, preferably C1 to C6 esters, of succinic acid, glutaric acid, and adipic acid) . Specific non-limiting examples of di-and tri-alkyl and alkenyl esters of carboxylic acids include isocetyl stearyol stearate, diisopropyl adipate, dibutyl adipate, and tristearyl citrate.
[0067] According to the invention, Dibutyl Adipate ( B) is suitable to be used in the thermo-sensitive composition according to the invention, which is commercially available from BASF.
[0068] Emulsifiers
[0069] In the context of the present invention, the thermo-sensitive composition comprises at least one emulsifier.
[0070] Any conventionally used emulsifier in cosmetic application or personal care application can be used for the present compositions.
[0071] Emulsifier may comprise for example:
[0072] Carboxylic acids and their salts: alkaline soap of sodium, potassium and ammonium, metallic soap of calcium or magnesium, organic basis soap such as Lauric, palmitic, stearic and oleic acid etc. Alkyl phosphates or phosphoric acid esters, acid phosphate, diethanolamine phos-phate, potassium cetyl phosphate. Ethoxylated carboxylic acids or polyethyleneglycol esters, PEG-n acylates. Linear fatty alcohols having from 8 to 22 carbon atoms, branched from 2 to 30 mol of ethylene oxide and / or from 0 to 5 mol propylene oxide with fatty acids having from 12 to 22 carbon atoms and with alkylphenols having from 8 to 15 carbon atoms in the alkyl group. Fatty alcohol polyglycolether such as Beheneth-n (for example Beheneth-25 ( BA 25) ) , laureth-n, ceteareth-n, steareth-n, oleth-n. Fatty acid polyglycolether such as PEG-n stea-rate, PEG-n oleate, PEG-n cocoate. Monoglycerides and polyol esters. C12-C22 fatty acid mono-and di-esters of addition products of from 1 to 30 mol of ethylene oxide with polyols. Fatty acid and polyglycerol ester such as monostearate glycerol, diisostearoyl polyglyceryl-3-diisostearates, polyglyceryl-3-diisostearates, triglyceryl diisostearates, polyglyceryl-2-sesquiisostearates, polyglyceryl-2 dipolyhydroxystearate, or polyglyceryl dimerates. Mixtures of compounds from a plurality of those substance classes are also suitable. Fatty acid polyglyco-lesters such as monostearate diethylene glycol, fatty acid and polyethylene glycol esters, fatty acid and saccharose esters such as sucro esters (for example sucrose polystearate ( Sucro) ) , glycerol and saccharose esters such as sucro glycerides. Sorbitol and sorbitan, sorbitan mono-and di-esters of saturated and unsaturated fatty acids having from 6 to 22 carbon atoms and ethylene oxide addition products. Polysorbate-n series, sorbitan esters such as sesquiisostearate, sorbitan, PEG- (6) -isostearate sorbitan, PEG- (10) -sorbitan laurate, PEG-17-dioleate sorbitan. Glucose derivatives, C8-C22 alkyl-mono-and oligo-glycosides and ethoxylated analogues with glucose being preferred as the sugar component. O / W emulsifiers such as methyl gluceth-20 sesquistearate, sorbitan stearate / sucrose cocoate, methyl glucose sesquistearate, cetearyl alcohol / cetearyl glucoside ( PL 68 / 50) . W / O emulsifiers such as methyl glucose dioleate / methyl glucose isostearate. Sulfates and sulfonated derivatives, dialkylsulfosuccinates, dioctyl succinate, alkyl lauryl sulfonate, linear sulfonated parafins, sul-fonated tetraproplyne sulfonate, sodium lauryl sulfates, amonium and ethanolamine lauryl sul-fates, lauyl ether sulfates, sodium laureth sulfates, sulfosuccinates, aceyl isothionates, alka-nolamide sulfates, taurines, methyl taurines, imidazole sulfates; polysiloxane / polyalkyl / polyether copolymers and derivatives, dimethicone, copolyols, silicone polyethylene oxide copolymer, silicone glycol copolymer; propoxylated or POE-n ethers (Meroxapols) ; zwitterionic surfactants that carry at least one quaternary ammonium group and at least one carboxylate and / or sul-fonate group in the molecule. Zwitterionic emulsifiers that are especially suitable are betaines, such as N-alkyl-N, N-dimethylammonium glycinates, cocoalkyldimethylammonium glycinate, N-acylaminopropyl-N, N-dimethylammonium glycinates, cocoacylaminopropyldimethylammoni-um glycinate and 2-alkyl-3-carboxymethyl-3-hydroxyethylimidazolines each having from 8 to 18 carbon atoms in the alkyl or acyl group and also cocoacylaminoethylhydroxyethylcarbox-ymethylglycinate, N-alkylbetaine, N-alkylaminobetaines. alkylimidazolines, alkylopeptides, lipoaminoacides, self-emulsifying bases and the compounds as described in K.F. DePolo, A short textbook of cosmetology, Chapter 8, Table 8-7, p250-251.
[0073] In one embodiment, the emulsifier may comprise for example non-ionic emulsifiers, such as
[0074] (1) products of the addition of 2 to 50 mol ethylene oxide and / or 1 to 20 mol propylene oxide onto linear fatty alcohols containing 8 to 40 carbon atoms, onto fatty acids containing 12 to 40 carbon atoms and onto alkylphenols containing 8 to 15 carbon atoms in the alkyl group;
[0075] (2) C12-18 fatty acid monoesters and diesters of products of the addition of 1 to 50 mol ethylene oxide onto glycerol;
[0076] (3) sorbitan monoesters and diesters of saturated and unsaturated fatty acids containing 6 to 22 carbon atoms and ethylene oxide adducts thereof;
[0077] (4) alkyl mono-and oligoglycosides containing 8 to 22 carbon atoms in the alkyl group and ethoxylated analogs thereof;
[0078] (5) products of the addition of 7 to 60 mol ethylene oxide onto castor oil and / or hydrogenated castor oil;
[0079] (6) polyol esters and, in particular, polyglycerol esters such as, for example, polyolpoly-12-hydroxystearate, polyglycerol polyricinoleate, polyglyceryl-4-laurate, polyglycerol diisostearate or polyglycerol dimerate. Mixtures of compounds from several of these classes are also suitable;
[0080] (7) partial esters based on linear, branched, unsaturated or saturated C6-22 fatty acids, ricinoleic acid and 12-hydroxystearic acid and polyglycerol, pentaerythritol, dipentaerythritol, sugar alcohols (for example sorbitol) , alkyl glucosides (for example methyl glucoside, butyl glucoside, lauryl glucoside) and polyglucosides (for example cellulose) or mixed esters, as well as sucrose fatty acid polyester (for example sucrose esterified with C8-C20, or C12-C18, or C14-C18 fatty acids) , for example sucrose polystearate;
[0081] (8) polysiloxane / polyalkyl polyether copolymer or corresponding derivatives; and
[0082] (9) mixed esters of pentaerythritol, fatty acids, citric acid and fatty alcohol and / or mixed esters of fatty acids containing 6 to 22 carbon atoms, methyl glucose and polyols, preferably glycerol or polyglycerol.
[0083] In one embodiment, the emulsifier may comprise for example PEG-2 stearate SE, glyceryl stea-rate SE, propylene glycol stearate, cetearyl alcohol and sodium cetearyl sulfate, cetearyl alcohol and sodium lauryl sulfate, trilaneth-4 phosphate and glycol stearate and PEG-2 stearate, glyc-eryl stearate and sodium lauryl sulfate, sodium stearoyl glutamate (for example SG) , cetearyl alcohol and cetrimonium bromide.
[0084] In one preferable embodiment, the composition comprises at least one nonionic emulsifier, wherein the at least one nonionic surfactant can be the alkoxylated nonionic surfactant or non-alkoxylated nonionic surfactant. Preferably, the alkyoxylated nonionic surfactant is C12-C24 fatty acid ethoxylate, more preferably C16-C22 fatty acid ethoxylates, and the non-alkoxylated nonionic emulsifier is sucrose fatty acid ester.
[0085] In one more preferable embodiment, the composition comprises at least one anionic emulsifier and at least one nonionic emulsifier, wherein the at least one anionic emulsifier is N-acyl amino acid based surfactant. Examples of N-acyl amino acid based surfactants include but are not limited to N-acylated alanine, N-acylated glutamic acid, N-acrylated glycine, N-acrylated sarcosine, and their salts. In particular, the amino acid based surfactant can be a C8-C16 acyl sarcosinate, a C8-C16 acyl glutamate, a C8-C16 acyl glycinate, or a combination thereof. The C8-C16 acyl sarcosinate, C8-C16 acyl glutamate, and / or C8-C16 acyl glycinate is an anionic surfactant derived from the amino acid sarcosine, glutamine, or glycine, respectively, and a corresponding C8-C16 fatty acid. Suitable C8-C16 acyl sarcosinates include but are not limited to: sodium lauroyl sarcosinate, sodium cocoyl sarcosinate (which is a mixture of sodium C8-C16 acyl sarcosinates) , sodium myristoyl sarcosinate, ammonium lauroyl sarcosinate, ammonium cocoyl sarcosinate, isopropyl lauroyl sarcosinate, potassium cocoyl sarcosinate, potassium lauroyl sarcosinate, and combinations thereof; suitable C8-C16 acyl glutamates include but are not limited to: sodium lauroyl glutamate, sodium cocoyl glutamate (which is a mixture of sodium C8-C16 acyl glutamates) , sodium myristoyl glutamate, ammonium lauroyl glutamate, ammonium cocoyl glutamate, isopropyl lauroyl glutamate, potassium cocoyl glutamate, potassium lauroyl glutamate, and combinations thereof; suitable C8-C16 acyl glycinates include but are not limited to: sodium lauroyl glycinate, sodium cocoyl glycinate (which is a mixture of sodium C8-C16 acyl glycinates) , sodium myristoyl glycinate, ammonium lauroyl glycinate, ammonium cocoyl glycinate, isopropyl lauroyl glycinate, potassium cocoyl glycinate, potassium lauroyl glycinate, and combinations thereof. Combinations of one or more C8-C16 acyl sarcosinates, C8-C16 acyl glutamates, and / or C8-C16 acyl glycinates may also be used.
[0086] Thickeners
[0087] Suitable thickeners for the thermo-sensitive composition according to the invention are polysac-charides, preferably xanthan gum (for example XGN (commercially available from BASF) ) , guar gum, agar, alginates or tyloses, cellulose derivatives, for example hydroxyalkyl-cellulose, wherein alkyl is a C1-C4-alkyl, particularly hydroxyethyl-cellulose, preferably the Na-trosolTM trademarks, especially preferably NatrosolTM 250 (CAS-Nr. 9004-62-0) of Herkules In-corporated, carboxymethylcellulose or hydroxycarboxymethylcellulose, starches, preferably the trademark National 465, Purity W or starch B990, and also relatively high molecular weight pol-yethylene glycol mono-and diesters of fatty acids, fatty alcohols, monoglycerides and fatty ac-ids.
[0088] Suitable thickeners are also polyacrylates, crosslinked polyacrylic acids and derivatives thereof, such as CD, and TTA (commercially available from BASF) , (commercially available from Lubrizol) , (commercially available from Lubrizol) , EM (commercially available from BASF) , SP (commercially available from BASF) , GTC UP (commercially available from BASF) , 98 (commercially available from Seppic) , (commercially available from Sigma) , the grades from Rohm and Haas, such as 22 (copolymer of acrylates and methacrylic acid ethoxylates with stearyl radical (20 ethylene oxide (EO) units) ) and 28 (copolymer of acrylates and methacrylic acid ethoxylates with behenyl radical (25 EO units) ) .
[0089] Suitable thickeners are furthermore, for example, aerosol grades (hydrophilic silicas) , polyacrylamides, polyvinyl alcohol and polyvinylpyrrolidone, ethoxylated fatty acid glycerides, esters of fatty acids with polyols, such as, for example, pentaerythritol or trimethylolpropane, fatty alcohol ethoxylates with a narrowed homolog distribution or alkyl oligoglucosides, and also electrolytes such as sodium chloride and ammonium chloride.
[0090] Preservatives
[0091] The thermo-sensitive composition according to the invention can advantageously comprise one or more preservatives.
[0092] Advantageous preservatives within the context of the present invention are, for example, formaldehyde donors (such as, for example, DMDM hydantoin, which is commercially available, for example, under the trade name (commercially available from Lonza) ) , iodopropyl butylcarbamates (for example (commercially available from Lonza) , (commercially available from Jan Dekker) ) , parabens (p-hydroxybenzoic acid alkyl esters, such as, for example, methyl, ethyl, propyl and / or butylparaben) , dehydroacetic acid ( K 702 (commercially available from Schülke & Mayr) ) , phenoxyethanol, ethanol, benzoic acid, or combination thereof. So-called preservation aids, such as, for example, octoxyglycerol, glycine, soya etc., are also advantageously used.
[0093] Also advantageous are preservatives or preservation aids customary in cosmetics, such as dibromodicyanobutane (2-bromo-2-bromomethylgIutarodinitrile) , 3-iodo-2-propynyl butylcarbamate, 2-bromo-2-nitropropane-1, 3-diol, imidazolidinyIurea, 5-chloro-2-methyl-4-isothiazolin-3-one, 2-chloroacetamide, benzyl alcohol, salicylic acid and saIicylates.
[0094] Perfume oils
[0095] If appropriate, the thermo-sensitive composition according to the invention can comprise perfume oils. Perfume oils which may be mentioned are, for example, mixtures of natural and synthetic fragrances. Natural fragrances are extracts from flowers (lily, lavender, rose, jasmine, neroli, Ylang-Ylang) , stems and leaves (geranium, patchouli, petit grain) , fruits (anis, coriander, caraway, juniper) , fruit peels (bergamot, lemon, orange) , roots (mace, angelica, celery, cardamom, costus, iris, calmus) , woods (pinewood, sandalwood, guaiac wood, cedarwood, rosewood) , herbs and grasses (tarragon, lemongrass, sage, thyme) , needles and branches (spruce, fir, pine, dwarf-pine) , resins and balsams (galbanum, elemi, benzoe, myrrh, olibanum, opoponax) . Also suitable are animal raw materials, such as, for example, civet and castoreum. Typical synthetic fragrance compounds are products of the ester, ether, aldehyde, ketone, alcohol and hydrocarbon type. Fragrance compounds of the ester type are, for example, benzyl acetate, phenoxyethyl isobutyrate, 4-tert-butyl cyclohexyl acetate, linalyl acetate, dimethylbenzylcarbinyl acetate, phenylethyl acetate, linalyl benzoate, benzyl formate, ethylmethyl phenylglycinate, allyl cyclohexylpropionate, styrallyl propionate and benzyl salicylate. The ethers include, for example, benzyl ethyl ether, the aldehydes include, for example, the linear alkanals having 8 to 18 carbon atoms, citral, citronellal, citronellyloxyacetaldehyde, cyclamenaldehyde, hydroxycitronellal, lilial and bourgeonat, the ketones include, for example, the ionones, cc-isomethylions and methyl cedryl ketone, the alcohols include anethol, citronellol, eugenol, isoeugenol, geraniol, linalool, phenylethyl alcohol and terioneol, and the hydrocarbons include primarily the terpenes and balsams. However, preference is given to using mixtures of different fragrances which together produce a pleasing scent note. Essential oils of lower volatility, which are mostly used as aroma components, are also suitable as perfume oils, for example sage oil, chamomile oil, oil of cloves, melissa oil, mint oil, cinnamon leaf oil, linden blossom oil, juniper berry oil, vetiver oil, olibanum oil, galbanum oil, labolanum oil and lavandin oil. Preference is given to using bergamot oil, dihydromyrcenol, lilial, lyral, citronellol, phenylethyl alcohol, α-hexylcinnamaldehyde, geraniol, benzyl acetone, cyclamenaldehyde, linalool, Forte, ambroxan, indol, hedione, sandelice, lemon oil, mandarin oil, orange oil, allyl amyl glycolate, cyclovertal, lavandin oil, clary sage oil, β-damascone, geranium oil bourbon, cyclohexyl salicylate, Coeur, iso NP, evernyl, iraldein gamma, phenylacetic acid, geranyl acetate, benzyl acetate, rose oxide, romillat, irotyl and floramat alone or in mixtures.
[0096] Active ingredients
[0097] It has been found that active ingredients of varying solubility can be homogeneously incorporated into the thermo-sensitive composition according to the invention.
[0098] According to the invention, the active ingredients can advantageously be selected from a group of NO synthase inhibitors, particularly if the thermo-sensitive composition according to the invention are to serve for the treatment and prophylaxis of the symptoms of intrinsic and / or extrinsic aging and also for the treatment and prophylaxis of the harmful effects of ultraviolet radiation on the skin. A preferred NO synthase inhibitor is nitroarginine.
[0099] Furthermore, the active ingredients are advantageously selected from a group consisting of catechins and bile acid esters of catechins and aqueous or organic extracts from plants or parts of plants which have a content of catechins or bile acid esters of catechins, such as, for example, the leaves of the plant family Theaceae, in particular of the species Camellia sinensis (green tea) . Their typical ingredients (for example polyphenols or catechins, caffeine, vitamins, sugars, minerals, amino acids, lipids) are particularly advantageous.
[0100] Catechins are a group of compounds which are to be regarded as hydrogenated flavones or anthocyanidins and are derivatives of "catechins" (catechol, 3, 3', 4', 5, 7-flavanpentaol, 2- (3, 4-dihydroxyphenyl) chroman-3, 5, 7-triol) . Epicatechin ( (2R, 3R) -3, 3', 4', 5, 7-flavanpentaol) is also an advantageous active ingredient within the context of the present invention.
[0101] Also advantageous are plant extracts with a content of catechins, in particular extracts of green tea, such as, for example, extracts from leaves of the plants of the Camellia spec. species, very particularly of the tea varieties Camellia sinenis, C. assamica, C. taliensis and C. inawadiensis and hybrids of these with, for example, Camellia japonica.
[0102] Preferred active ingredients are also polyphenols and catechins from a group consisting of (-) catechin, (+) -catechin, (-) -catechin gallate, (-) -gallocatechin gallate, (+) -epicatechin, (-) -epicatechin, (-) -epicatechin gallate, (-) -epigallocatechin, (-) -epigaIlocatechin gaIlate.
[0103] Flavone and its derivatives (often also collectively called "flavones" ) are also advantageous active ingredients within the context of the present invention.
[0104] Further preferred active ingredients are sericoside, pyridoxol, vitamin K, biotin and aroma substances, bisabolol (bisabolol rac. (commercially available from BASF) ) , tocopherol ( T-50 C (commercially available from BASF) ) , retinyl palmitate (Vitamin A-Palmitate Care (commercially available from BASF) ) , retinol (Retinol 50 C (commercially available from BASF) ) , Schizandra Chinensis Fruit Extract ( LS 9905 (commercially available from BASF) ) .
[0105] Furthermore, the active ingredients can also very advantageously be selected from a group of hydrophilic active ingredients, in particular from the following group:
[0106] α-hydroxy acids, such as lactic acid or salicylic acid and salts thereof, such as, for example, Na-lactate, Ca-lactate, TEA-lactate, urea, allantoin, serine, sorbitol, milk proteins, panthenol, chitosan, glycerin and glyceryl glucoside (for example Aquaporin (commercially available from BASF) ) or combination thereof.
[0107] The list of specified active ingredients and active ingredient combinations which can be used in the thermo-sensitive composition according to the invention is not of course intended to be limiting. The active ingredients can be used individually or in any combinations with one another.
[0108] The specified and further active ingredients which can be used in the thermo-sensitive composition according to the invention are given in DE 103 18 526 A1 on pages 12 to 17, to which reference is made at this point in its entirety.
[0109] Benefit agents
[0110] The compositions of the present invention may further comprise one or more benefit agents that can provide a positive and / or beneficial effect to the substrate being cared, e.g. to the skin. The skilled person in the art is able to select according to general knowledge in the art of formulating cosmetic compositions, and the vast literature there-related, such optional ingredients appropriate for application purposes.
[0111] In one embodiment, the thermo-sensitive composition according to the invention further comprises one or more benefit agents, such as conditioners, skin conditioners, such as vitamins or their derivatives, such as vitamin B complex, including thiamine, nicotinic acid, biotin, pantothenic acid, choline, riboflavin, vitamin B6, vitamin B12, pyridoxine, inositol, carnitine, vitamins A, C, D, E, K and their derivatives, such as vitamin A palmitate, and pro-vitamins, e.g., panthenol (pro vitamin B5) , panthenol triacetate and mixtures thereof; antioxidants; free-radical scavengers; abrasives, natural or synthetic; dyes; hair coloring agents; bleaching agents; hair bleaching agents; UV absorbers, such as benzophenone, bornelone, PABA (Para Amino Benzoic Acid) , butyl PABA, cinnamidopropyl trimethyl ammonium chloride, disodium distyrylbiphenyl disulfonate, potassium methoxycinnamate; anti-UV agents, such as butyl methoxydibenzoylmethane, octyl methoxycinnamate, oxybenzone, octocrylene, octyl salicylate, phenylbenzimidazole sulfonic acid, ethyl hydroxypropyl aminobenzoate, menthyl anthranilate, aminobenzoic acid, cinoxate, diethanolamine methoxycinnamate, glyceryl aminobenzoate, titanium dioxide, zinc oxide, oxybenzone, octyl dimethyl PABA (padimate O) , red petrolatum; antimicrobial agents; antibacterial agents, such as bacitracin, erythromycin, triclosan, neomycin, tetracycline, chlortetracycline, benzethonium chloride, phenol, parachlorometa xylenol (PCMX) , triclocarban (TCC) , chlorhexidine gluconate (CHG) , zinc pyrithione, selenium sulfide; antifungal agents; melanin regulators; tanning accelerators; depigmenting agents, such as retinoids such as retinol, kojic acid and its derivatives such as, for example, kojic dipalmitate, hydroquinone and its derivatives such as arbutin, transexamic acid, vitamins such as niacin, vitamin C and its derivatives, azelaic acid, placertia, licorice, extracts such as chamomile and green tea, where retinol, kojic acid, and hydroquinone are preferred; skin lightening agents such as hydroquinone, catechol and its derivatives, ascorbic acid and its derivatives; skin coloring agents, such as dihydroxyacetone; liporegulators; weight-reduction agents; anti-acne agents; anti-seborrhoeic agents; anti-ageing agents; anti-wrinkle agents; keratolytic agents; anti-inflammatory agents; anti-acne agents, such as tretinoin, isotretinoin, motretinide, adapalene, tazarotene, azelaic acid, retinol, salicylic acid, benzoyl peroxide, resorcinol, antibiotics such as tetracycline and isomers thereof, erythromycin, anti-inflammatory agents such as ibuprofen, naproxen, hetprofen, botanical extracts such as alnus, arnica, artemisia capillaris, asiasarum root, calendula, chamomile, nidium, comfrey, fennel, galla rhois, hawthorn, houttuynia, hypericum, jujube, kiwi, licorice, magnolia, olive, peppermint, philodendron, salvia, sasa albomarginata, imidazoles such as ketoconazole and elubiol; refreshing agents; cicatrizing agents; vascular-protection agents; agents for the reduction of dandruff (Anti-dandruff agent) , seborrheic dermatitis, or psoriasis, such as pyrithione salts, being formed from heavy metals such as zinc, tin, cadmium, magnesium aluminum, sodium and zirconium, like zinc pyrithione, shale oil and derivatives thereof such as sulfonated shale oil, selenium sulfide, sulfur, salicylic acid, coal tar, povidone-iodine, imidazoles such as ketoconazole, dichlorophenyl imidazolodioxalan, clotrimazole, itraconazole, miconazole, climbazole, tioconazole, sulconazole, butoconazole, fluconazole, miconazolenitrite and any possible stereo isomers and derivatives thereof such as anthralin, piroctone olamine (Octopirox) , selenium sulfide, ciclopirox olamine, anti-psoriasis agents such as vitamin D analogs, e.g. calcipotriol, calcitriol, and tacaleitrol, vitamin A analogs such as esters of vitamin A, including vitamin A palmitate, retinoids, retinols, and retinoic acid, corticosteroids such as hydrocortisone, clobetasone, butyrate, clobetasol propionate; antiperspirants or deodorants, such as aluminum chlorohydrates, aluminum zirconium chlorohydrates; immunomodulators; nourishing agents; depilating agents, such as calcium thioglycolate, magnesium thioglycolate, potassium thioglycolate, strontium thioglycolate; agents for combating hair loss; reducing agents for permanent-waving; reflectants, such as mica, alumina, calcium silicate, glycol dioleate, glycol distearate, silica, sodium magnesium fluorosilicate; essential oils and fragrances.
[0112] Needless to say, the thermo-sensitive composition according to the invention should be cosmetically or dermatologically acceptable, i.e., it should contain a non-toxic physiologically acceptable medium and should be able to be applied to the skin. For the purposes of the invention, the expression "cosmetically acceptable" means a composition of pleasant appearance, odor, feel and / or taste.
[0113] The pH of the thermo-sensitive composition according to the invention can be conventionally adjusted to for example from 4.0 to 7.0, preferably from 4.5 to 6.5, more preferably from 5.0 to 6.5.
[0114] In a third aspect, the present invention provides the use of the thermo-sensitive composition according to the invention as a delivery system for cosmetically active ingredients.
[0115] It has been found that the thermo-sensitive partially degalactosylated xyloglucan according to the present invention can show a perceivable thermo-sensitive behavior in the range of skin temperature.
[0116] Examples
[0117] Aspects of the present invention are more fully illustrated by the following Examples, which are set forth to illustrate certain aspects of the present invention and are not to be construed as limiting thereto.
[0118] Materials:
[0119] The materials shown in Table 2 are used.
[0120] Table 2
[0121] Preparation of the thermo-sensitive partially degalactosylated xyloglucan:
[0122] Example 1:
[0123] Sodium Citrate Buffer Stock Solution: 1 M, pH = 4.5; diluted to 20 mM, pH = 5.5 with water Beta galactosidase: Lactase F “Amino” 100 conc. commercially available from Amano Enzyme Inc., Lot no. LAFH0350249, purified according to steps 1 and 2 in Examples 1 and 2 of WO2014154806 A1.
[0124] Enzyme concentration 1217 U / ml, 1.7 mg / ml
[0125] Xyloglucan:
[0126] commercially available from Sumitomo Pharma Food &Chemical Co., Ltd;
[0127] Enzyme reaction of 2 wt. %xyloglucan aqueous solution (at 50 ℃, 4, 6, 8, 16, 20, 22.5, 24 hours (h) reaction under 250 g of reaction batch) :
[0128] 1 g of the xyloglucan powder was slowly added to 239.65 g of deionized (DI) water in a 500 ml flask and homogenized (PROMIX Robo Mixer, at 4000 rpm) for 15 min until a homogenous solution was formed. 5 ml of the sodium citrate buffer (1 M, pH=4.5) was transferred by a 1000 μl pipette to adjust the solution to pH=5.5 (±0.2) and 0.5 g of the preservative (Glydant Liquid) was added into the solution to prevent from molding. 50 g of the resulting solution was transferred to a 500 ml round bottom flask equipped with a magnetic stir bar and incubated in a water bath at 50 ℃ and under stirring at 300 rpm. 6.16 ml of beta galactosidase was added (1500 U of beta-galactosidase / g of xyloglucan) and incubated in the flask at 50 ℃ and 300 rpm for 4, 6, 8, 16, 20, 22.5, 24 hours, respectively. The enzyme was deactivated by heating to 90 ℃ for 30 min.
[0129] Thermo-response evaluation:
[0130] -Returning the solution into room temperature.
[0131] -Transferring ~5 ml of the 2 wt. %modified xyloglucan solution into a glass vial with water bath for 3 min at 33 ℃.
[0132] -Checking the thermo-response by observing the transition from solution to gel state known as “sol-gel” transformation.
[0133] Result: The thermo-response begins from 20 hours up to 22.5 hours of reaction, and the sample returns to non “sol-gel” activity after 24 hours (h) of reaction.
[0134] The Example 1 was repeated, except for the use of xyloglucan under the tradename Glyloid 6C and the same results were observed.
[0135] Example 2:
[0136] Preparation:
[0137] Beta galactosidase: Lactase DS 100 commercially available from Amano Enzyme Inc., prepared in a stock solution of 3000 U / ml (27.52 mg / ml)
[0138] Procedure: 688.07 mg of Lactase DS 100 powder was dissolved in 25 ml of water to obtain an aqueous solution with pH=7
[0139] Enzyme reaction of 2 wt. %xyloglucan aqueous solution from 1 hour to 5.5 hours with a sample collection every 0.5 hour (under 250 ml of reaction batch) :
[0140] 5 g of the xyloglucan powder was weighed and slowly added into 239.65 ml of water with a homogenizer (PROMIX Robo Mixer 4000 rpm / min) until the powder was fully homogenously mixed. Then 5 ml of sodium citrate buffer solution was added into the solution and stirred thoroughly to adjust the solution to pH=5 (±0.2) . 0.5 g of the preservative (Glydant Liquid) was added into the solution to prevent from molding. 250 ml of 2 wt. %xyloglucan aqueous solution was transferred into a 500 ml round bottom flask with a magnetic stir bar and incubated in a water bath at 50 ℃ and 300 rpm. After the solution reached 50 ℃, total of 7500 U beta galactosidase (Lactase DS 100, commercially available from Amano Enzyme Inc. ) was added by a 1000 ul pipette. The samples were collected at 1 hour, 2 hours, 3 hours, 3.5 hours, 4 hours, 4.5 hours, and 5 hours respectively. The enzyme was deactivated by heating at 90 ℃ for 30 min. The solution was cooled down and stored at 4 ℃ over 1 month.
[0141] Thermo-response evaluation:
[0142] -Returning the solution into room temperature.
[0143] -Transferring ~5 ml of the 2 wt. %modified xyloglucan solution into a glass vial with water bath for 3 min at 33 ℃.
[0144] -Observing and screening the solution that has the “solution to gel” thermo-response effect.
[0145] -Returning the solution to room temperature to evaluate the gel to solution effect.
[0146] Result: “Sol-gel” of the samples exhibits the best result with 3.5-hour degalactosylation enzyme modification. There are no “sol-gel” response before 3-hour reaction and the solution become a more viscous solution after 4.5-hour reaction
[0147] Example 3:
[0148] Sodium Citrate Buffer Stock Solution: 1 M pH = 4.5; diluted to 20 mM pH = 5.5 with water Beta galactosidase: Lactase DS 100 commercially available from Amano Enzyme Inc., prepared in a stock solution of 3000 U / ml (27.52 mg / ml)
[0149] Procedure: 688.07 mg of Lactase DS 100 powder was dissolved in 25 ml water to obtain an aqueous solution with pH=7
[0150] Enzyme reaction of 2 wt. %xyloglucan aqueous solution (at 50 ℃, for 16, 20, 22.5, 24 hours reaction respectively under 250 g of reaction batch) :
[0151] 1 g of the xyloglucan powder was weighed and homogenized (PROMIX Robo Mixer 4000 rpm / min) with 239.65 g of DI water for 15 min until a homogenous solution was formed. (Noted the xyloglucan powder should be added slowly to prevent any clot form in the mixing process. ) 5ml of the sodium citrate buffer (1 M, pH=4.5) was transferred by a 1000 ul pipette to adjust the solution to pH=5.5 (±0.2) and 0.5 g of the preservative (Glydant Liquid) to prevent from molding. The final 50 g of xyloglucan aqueous solution was transferred into a 500 ml round bottom flask with a magnetic stir bar and incubated in a water bath at 50 ℃ and 300 rpm. Then 7500 U of beta-galactosidase was added (1500 U of beta-galactosidase / g of xyloglucan) and incubated at 50 ℃ and 300 rpm for 16, 20, 22.5, 24 hours. The enzyme was deactivated by heating to 90 ℃ for 30 min. The solution was cooled down and stored at 4 ℃ over 1 month of preservation.
[0152] Thermo-response evaluation:
[0153] -Returning the solution into room temperature.
[0154] -Transferring ~5 ml of the 2 wt. %modified xyloglucan solution into a glass vial and incubating the solution in a water bath at 33 ℃ for 3 min.
[0155] -Checking the thermo-response by observing the transition from solution to gel state ( “sol-gel” transformation) .
[0156] Result: The thermo-response of this sample with Lactase DS 100 does not occur through 16 to 24-hour reaction. The sample remained in a solution state throughout the thermo-response evaluation. The extended reaction until 48 hour still remains in a solution state.
[0157] Example 4:
[0158] Preparation
[0159] Sodium Citrate Buffer Stock Solution: 1 M pH = 4.5; diluted to 20 mM pH = 5.5 with water Beta galactosidase: commercially available from Beijing HongRunBaoShun Technology Co., Ltd. Enzyme concentration: 3000 U / g of the beta-galactosidase powder
[0160] Enzyme reaction of 2 wt. %xyloglucan aqueous solution (at 50 ℃, for 4, 6, 8, 16, 20, 22.5, 24 hours respectively under 250 g reaction batch) : 5 g of the xyloglucan powder was weighed on the weighing sheet. 243.75 ml of water was added into a 500 ml beaker. The xyloglucan powder was slowly added and homogenized into water solution by PROMIX Robo Mixer (4000 rpm) for 15 min until a homogenous solution was formed. 5 ml of sodium citrate buffer solution was added into the solution and mixed thoroughly. The solution was measured as pH=5 (±0.2) . 0.5 g of the preservative (Glydant Liquid) was added. The 250 ml of 2 wt. %xyloglucan solution was transferred into a 500 ml round bottom flask with a magnetic stir bar. The solution was incubated in a water bath at 50 ℃ and 300 rpm. Then 2.5 g (7500 U) of the beta galactosidase (Beijing HongRunBaoShun Technology Co., Ltd. ) was added into the solution. The sample was collected at 0, 6, 8, 16, 18, 20, 22, 24 hours respectively. The enzyme was deactivated in the solution by heating at 90 ℃ for 30 min. The solution was cooled down to room temperature and stored at 4 ℃
[0161] Thermo-response evaluation:
[0162] -Returning the solution into room temperature.
[0163] -Transferring ~5 ml of the 2 wt. %modified xyloglucan solution into a glass vial.
[0164] -Incubating the solution in a water bath at 33 ℃ for 3 min.
[0165] -Observing and screening the solution that has the “solution to gel” thermo-response effect.
[0166] -Returning the solution to room temperature to evaluate the gel to solution effect.
[0167] Results: all the reaction samples do not show thermo-response effect.
[0168] Example 5:
[0169] Preparation
[0170] Sodium Citrate Buffer Stock Solution: 1 M pH = 4.5; diluted to 20 mM pH = 5.5 with water Beta galactosidase: Lactase F “Amino” 100 conc. commercially available from Amano Enzyme Inc., Lot no. LAFH0350249, purified according to steps 1 and 2 in Examples 1 and 2 of WO2014154806 A1. Enzyme concentration 1217 U / ml, 1.7 mg / ml
[0171] Beta galactosidase: Lactase DS 100 commercially available from Amano Enzyme Inc., prepared in a stock solution of 3000 U / ml (27.52 mg / ml)
[0172] Preparation of 2 wt. %xyloglucan (Ingredi) solution in a 250 ml reaction batch:
[0173] Preparing two batch of reaction. 5 g of the xyloglucan powder from Ingredi was slowly added into 243.75 ml of water by PROMIX Robo Mixer (4000 rpm) for 15 min until a homogenous solution was formed. 5ml of sodium citrate buffer solution was added into the solution and mixed thoroughly. The solution was measured as pH=5 (±0.2) . 0.5 g of the preservative (Glydant Liquid) was added. 250 ml of 2 wt. %xyloglucan solution was transferred into a 500ml round bottom flask with a magnetic stir bar. The solution was incubated in a water bath at 50 ℃ and 300 rpm.
[0174] Beta-galactosidase (Lactase DS 100) reaction: 2.5 ml (7500 U) of the beta galactosidase was added into the solution.
[0175] Beta-galactosidase (Lactase F “Amino” 100 conc. ) reaction: 6.16 ml of beta galactosidase was added into the solution. The samples at 0, 3, 6, 8, 16, 18, 20, 22, 24 hours were collected respectively. The enzyme was deactivated in the solution by heating at 90 ℃ for 30 min. The solution was cooled down to room temperature and stored at 4 ℃.
[0176] Thermo-response evaluation:
[0177] -Returning the solution into room temperature.
[0178] -Transferring 5 ml of the 2 wt. %modified xyloglucan solution into a glass vial.
[0179] -Incubating the solution in a water bath at 33 ℃ for 3 min.
[0180] -Checking the thermo-response by observing the transition from solution to gel state, known as “sol-gel” transformation.
[0181] Result: Both samples which react with Lactase DS 100 and Lactase F “Amino” 100 conc. do not show the thermo-response effect.
[0182] Rheological experiments:
[0183] Summary of thermo-response behavior: 2 wt. %of modified xyloglucan solution was incubated in the water bath at 33 ℃ for 3 min. The sol-gel transition behavior was first evaluated visually, as shown in Table 3.
[0184] Table 3 T: Texure transition observed F: Fail to observe texure transition
[0185] Based on the visually evaluation of thermo-sensitivity, some of the samples were further evaluated on rheometer with Anton Paar MCR302 Rheometers on PP50 with hood measuring system. Temperature sweep experiments were done according to the following procedure: Set the gap to 1 mm with oil seal and set the temperature of measuring system at 10 ℃ for 5 min; Ramp 0.5 ℃ / min from 10 ℃ to 50 ℃ in oscillation mode (strain: 1 %; freq.: 1Hz) ; Cool down from 50 ℃ to 10 ℃ with the cooling rate of 0.5 ℃ / min in oscillation mode (strain 1%; freq.: 1Hz)
[0186] Loss factor is key parameter which indicate the “texture” of the substance. Lower the loss factor, more gel-like property. Therefore, the decreasing of the loss factor is a sign of sol-gel transformation.
[0187] Comparing the trace of loss factor of Example 1 (Reaction time from 20-24 hours, preferred 22.5 hours (h) ) and Example 2 (reaction time from 3 to 4.5 hours, preferred 3.5 hours) , the onset temperature of decreasing of loss factor is decreased from 28 ℃ to 11 ℃, indicating a more thermo-sensitive behavior around skin temperature.
[0188] Determination of monosaccharide composition of hydrolyzed and pristine xyloglucan
[0189] The typical monosaccharide composition of xyloglucan directly obtained from tamarind seeds is approximately 43-45%glucose, 35-38%xylose and 15-17%galactose, with minor amounts of arabinose and other sugars.
[0190] A detailed analysis method is as below:
[0191] 10 mg of the dried samples were hydrolyzed using 12 M H2SO4 for 30 min at the room temperature and then diluted to 2 M H2SO4 with distilled water for further hydrolysis at 100 ℃. Afterward, the hydrolysate was diluted 50 folds using distilled water and filtrated through 0.22 μm membrane. The filtrate was collected and injected into a high-performance anion-exchange chromatography system with below conditions. Glucose, xylose and galactose standards were used to calculate the monosaccharides quantitatively.
[0192] Column: CarboPac PA20 3 mm × 150 mm and CarboPac PG20 3 mm × 50 mm
[0193] Eluent phase: A: H2O; B: 200 mM NaOH; C: 100 mM NaOH + 500 mM NaOAc,
[0194] velocity: 0.4 ml / min
[0195] temperature: 30 ℃
[0196] inject volume: 25 μL
[0197] The monosaccharide composition of hydrolyzed and pristine xyloglucan is shown in Table 4.
[0198] Table 4
[0199] Determination of Molecular Weight:
[0200] The samples were dissolved in eluent at 1 mg / ml for 2 h at room temperature, filtered by 0.45 μm membrane before injection.
[0201] The results for determination of molecular weight are shown in Table 5.
[0202] Table 5
[0203] Formulation Preparation:
[0204] Example 6:
[0205] The emulsion was prepared from the materials shown in Table 6.
[0206] Table 6
[0207] Preparation:
[0208] 1. Dissolving Phase C in Phase B to obtain Mixture 1
[0209] 2. Heating Phase A up to 85 ℃
[0210] 3. Adding Phase A to Mixture 1 obtained in step 1 to obtain Mixture 2
[0211] 4. Homogenizing Mixture 2 obtained in step 3 with a homogenizer at 55 -50 ℃
[0212] 5. Adding preservative to Mixture 2 homogenized in step 4 below 40 ℃ to Mixture 3
[0213] 6. Stirring Mixture 3 obtained in step 5 until homogeneous
[0214] 7. Adjusting pH-value of the homogeneous Mixture 3 obtained in step 6 with citric acid to 5.0 –7.0
[0215] Example 7: aqueous base
[0216] The aqueous base was prepared from the materials shown in Table 7.
[0217] Table 7
[0218] Preparation:
[0219] 1. Dissolving dXG in water to obtain Phase A
[0220] 2. Adding Phase B and Phase C successively to Phase A obtained in step 1 to obtain Mixture 1
[0221] 3. Stirring Mixture 1 obtained in step 2 until homogeneous
[0222] 4. Adjusting pH-value of the homogeneous Mixture 1 obtained in step 3 with citric acid to 5.0 –7.0
Claims
1.A thermo-sensitive partially degalactosylated xyloglucan, which comprises from 54.5 to 68%by weight of glucose units, from 25 to 38%by weight of xylose units, and from 7 to 13.3%by weight of galactose units, based on the weight of the thermo-sensitive partially degalactosylated xyloglucan, wherein the thermo-sensitive partially degalactosylated xy-loglucan has a texture transition temperature of from 5 to 40℃.2.The thermo-sensitive partially degalactosylated xyloglucan according to claim 1, wherein the partially degalactosylated xyloglucan comprises from 54.8 to 65%by weight, preferably from 55 to 62%by weight of glucose units, from 28 to 35%by weight, preferably from 29 to 33%by weight of xylose units, and from 8 to 13%by weight, preferably from 9 to 12.8%by weight of galactose units, based on the weight of the thermo-sensitive partially degalacto-sylated xyloglucan.3.The thermo-sensitive partially degalactosylated xyloglucan according to claim 1 or 2, wherein the partially degalactosylated xyloglucan has a texture transition temperature of from 8 to 30℃, preferably from 10 to 20℃.4.The thermo-sensitive partially degalactosylated xyloglucan according to any of claims 1 to 3, wherein the partially degalactosylated xyloglucan has a weight average molecular weight (Mw) of from 200,000 to 10,000,000, preferably from 500,000 to 5,000,000, more preferably from 1,000,000 to 2,000,000, as determined by conventional methods, for example by Gel Permeation Chromatography (GPC) .5.The thermo-sensitive partially degalactosylated xyloglucan according to any of claims 1 to 4, wherein the partially degalactosylated xyloglucan has a number average molecular weight (Mn) of from 100,000 to 5,000,000, preferably from 200,000 to 2,000,000, more preferably from 400,000 to 800,000, as determined by conventional methods, for example by GPC.6.The thermo-sensitive partially degalactosylated xyloglucan according to any of claims 1 to 5, wherein the thermo-sensitive partially degalactosylated xyloglucan has a polydiseperse in-dex (PDI) of from 1.2 to 4, preferably from 2 to 3.8, more preferably from 2.5 to 3.5.7.The thermo-sensitive partially degalactosylated xyloglucan according to any of claims 1 to 6, wherein the partially degalactosylated xyloglucan has a purity of at least 80 %by weight, preferably at least 90 %, more preferably at least 95 %, most preferably at least 98 %, based on the total weight of the partially degalactosylated xyloglucan.8.A thermo-sensitive composition comprising the thermo-sensitive partially degalactosylated xyloglucan according to any of claims 1 to 7.9.The thermo-sensitive composition according to claim 8, further comprising at least one ad-ditional component selected from the group consisting of ester or alkane-based emollient, emulsifier, thickeners, preservatives, perfume oils, active ingredients, and benefit agents.10.Use of the thermo-sensitive partially degalactosylated xyloglucan according to any of claims 1 to 7 as a delivery system for cosmetically active ingredients.
Citation Information
Patent Citations
High-fat cleaning emulsion
DE10318526A1
Process for separating polysaccharides from tamarind seeds
US4895938A
Process for preparing partially degalactosylated xyloglucan and its use for oilfield applications
WO2014154806A1