A polymer, a composition comprising the same, the use thereof, and a method for preparing thereof
A modified hyaluronic acid polymer with a diselenide group addresses the lack of anti-oxidation in personal care products, offering improved anti-oxidation efficacy and simplifying formulations by combining moisturizing and anti-oxidation functions.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- ELC MANAGEMENT LLC
- Filing Date
- 2025-10-10
- Publication Date
- 2026-04-30
AI Technical Summary
Hyaluronic acid derivatives in personal care products lack anti-oxidation functionality, necessitating additional antioxidant ingredients, complicating formulations and limiting their application.
Development of a modified polysaccharide polymer, specifically hyaluronic acid with a diselenide group, having a molecular weight range of 20,000 to 50,000, which exhibits enhanced anti-oxidation properties, and when combined with a lower molecular weight polymer, achieves a synergistic effect.
The modified hyaluronic acid polymer improves anti-oxidation efficacy in personal care products, simplifies formulations, and enhances economic benefits by integrating both moisturizing and anti-oxidation functions.
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Figure CN2025126750_30042026_PF_FP_ABST
Abstract
Description
A POLYMER, A COMPOSITION COMPRISING THE SAME, THE USE THEREOF, AND A METHOD FOR PREPARING THEREOFTechnical Field
[0001] The present invention relates to a polymer, a method for preparing the same, and its use in personal care products. Moreover, the present invention relates to a composition comprising the polymer, a method for preparing the same, and its use in personal care products.Background Art
[0002] Polysaccharide polymers (e.g., hyaluronic acid (HA) and its derivatives) are among the commonly used ingredients in personal care products (e.g., cosmetics) . For example, hyaluronic acid (HA) , as a straight-chain linear macromolecular polysaccharide consisting of N-acetylglucosamine and D-glucuronic acid disaccharide repeating units, is known as an ideal natural moisturizing factor. Hyaluronic acid and its derivatives are widely used in the preparation of personal care products due to their extremely excellent moisturizing effect.
[0003] However, hyaluronic acid and its derivatives currently used in personal care products only have moisturizing function, but do not have anti-oxidation function. This, to some extent, limits the application of hyaluronic acid and its derivatives. Moisturizing and anti-oxidation are basic efficacies covered by personal care products. Thus, when hyaluronic acid and its derivatives are used to prepare personal care products, it is often necessary to additionally add an antioxidant ingredient to the formula, which will complicate the formula.
[0004] Accordingly, there still remains a need to find a modified polysaccharide polymer (e.g., modified hyaluronic acid) that has anti-oxidation function in addition to the functions of polysaccharide polymer itself (e.g., moisturizing function) , thereby expanding its application, improving product efficacies, simplifying product formula, and enhancing economic benefits.Summary of the Invention
[0005] The present invention is made in view of the above problems existing in the prior art.
[0006] In a first aspect, the present invention provides a polymer (hereinafter also referred to as the first polymer) having the structure of the following formula I:
[0007] wherein:
[0008] each occurrence of R1, R2, R3, R4, and R5 is independently selected from H, a group represented by -L3-OH, and a group represented by -NR7-C (O) -R8, wherein:
[0009] each occurrence of L3 is independently selected from a single bond and C1-C10 alkylene group, preferably from a single bond and C1-C6 alkylene group, more preferably from a single bond, methylene group, ethylene group, propylene group, and butylene group;
[0010] each occurrence of R7 and R8 is independently selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, propyl group, and butyl group;
[0011] each occurrence of Z is independently selected from the group consisting of:
[0012] - a group represented by -OM2, wherein M2 is selected from H and a metal ion, the metal ion is preferably selected from the group consisting of sodium, potassium, ammonium, zinc, and calcium ions; or
[0013] - a group represented by -X1-L1-M1-L2-R6, wherein
[0014] each occurrence of L1 and L2 is independently selected from C1-C10 alkylene group, preferably from C1-C6 alkylene group, more preferably from methylene group, ethylene group, propylene group, and butylene group;
[0015] each occurrence of X1 is selected from -NR9-, -S-, and -O-, wherein R9 is selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, propyl group, and butyl group; each occurrence of R6 is selected from -N (R10) (R11) , -SR10, and -OR10, wherein R10 and R11 are each independently selected from the group consisting of:
[0016] - H;
[0017] - C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, optionally comprising one or more heteroatoms such as halogen, O, or S atoms; and
[0018] - a group represented by -C (O) -G, wherein each occurrence of G is selected from the group consisting of: C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, optionally comprising one or more heteroatoms such as halogen, O, or S atoms; C6-C30 aromatic hydrocarbon group, preferably phenyl group unsubstituted or substituted by one or more C1-C10 alkyl groups, preferably C1-C4 alkyl groups; and a group represented by -L4-C (O) -OR16, wherein L4 is selected from a single bond and C1-C10 alkylene group, preferably from a single bond and C1-C6 alkylene group, more preferably from a single bond, methylene group, ethylene group, propylene group, and butylene group, R16 is selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, propyl group, and butyl group;
[0019] M1 is a group represented by - (Se) o- [L5- (Se) p] q-, wherein o is 1-10, preferably 2-5, p is 1-10, preferably 2-5, q is 0-10, preferably 0-5, each occurrence of L5 is independently selected from C1-C10 alkylene group, preferably from C1-C6 alkylene group, more preferably from methylene group, ethylene group, propylene group, and butylene group, and M1 comprises at least one Se-Se bond, preferably M1 is -Se-Se-;
[0020] n has a value such that the polymer has a number average molecular weight Mn from 20,000 to 50,000, preferably from 30,000 to 44,000, more preferably from 32,000 to 42,000, more preferably from 35,000 to 38,000; and
[0021] the atomic content of element Se in the polymer is from 0.10 at%to 10.00 at%, preferably from 0.15 at%to 0.50 at%, more preferably from 0.20 at%to 0.30 at%, based on the total amount of atoms other than hydrogen in the polymer.
[0022] In a second aspect, the present invention provides a composition comprising the polymer according to the first aspect.
[0023] In one embodiment, the composition comprises the polymer according to the first aspect (i.e., the first polymer) , and the composition further comprises a second polymer, the second polymer has the structure represented by the following formula I’ ,
[0024] wherein:
[0025] each occurrence of R1, R2, R3, R4, and R5 is independently selected from H, a group represented by -L3-OH, and a group represented by -NR7-C (O) -R8, wherein:
[0026] each occurrence of L3 is independently selected from a single bond and C1-C10 alkylene group, preferably from a single bond and C1-C6 alkylene group, more preferably from a single bond, methylene group, ethylene group, propylene group, and butylene group;
[0027] each occurrence of R7 and R8 is independently selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, propyl group, and butyl group;
[0028] each occurrence of Z is independently selected from the group consisting of:
[0029] - a group represented by -OM2, wherein M2 is selected from H and a metal ion, the metal ion is preferably selected from the group consisting of sodium, potassium, ammonium, zinc, and calcium ions; or
[0030] - a group represented by -X1-L1-M1-L2-R6, wherein:
[0031] each occurrence of L1 and L2 is independently selected from C1-C10 alkylene group, preferably from C1-C6 alkylene group, more preferably from methylene group, ethylene group, propylene group, and butylene group;
[0032] each occurrence of X1 is selected from -NR9-, -S-, and -O-, wherein R9 is selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, propyl group, and butyl group;
[0033] each occurrence of R6 is selected from -N (R10) (R11) , -SR10, and -OR10, wherein R10 and R11 are each independently selected from the group consisting of:
[0034] - H;
[0035] - C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, optionally comprising one or more heteroatoms such as halogen, O, or S atoms; and
[0036] - a group represented by -C (O) -G, wherein each occurrence of G is selected from the group consisting of: C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, optionally comprising one or more heteroatoms such as halogen, O, or S atoms; C6-C30 aromatic hydrocarbon group, preferably phenyl group unsubstituted or substituted by one or more C1-C10 alkyl groups, preferably C1-C4 alkyl groups; and a group represented by -L4-C (O) -OR16, wherein L4 is selected from a single bond and C1-C10 alkylene group, preferably from a single bond and C1-C6 alkylene group, more preferably from a single bond, methylene group, ethylene group, propylene group, and butylene group, R16 is selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, propyl group, and butyl group;
[0037] M1 is a group represented by - (Se) o- [L5- (Se) p] q-, wherein o is 1-10, preferably 2-5, p is 1-10, preferably 2-5, q is 0-10, preferably 0-5, each occurrence of L5 is independently selected from C1-C10 alkylene group, preferably from C1-C6 alkylene group, more preferably from methylene group, ethylene group, propylene group, and butylene group, and M1 comprises at least one Se-Se bond, preferably M1 is -Se-Se-;
[0038] n has a value such that the second polymer has a number average molecular weight Mn from 1,000 to 10,000, preferably from 2,000 to 8,000, more preferably from 3,000 to 5,500, more preferably from 3,500 to 5,000;
[0039] the atomic content of element Se in the second polymer is from 0.10 at%to 10.00 at%, preferably from 0.30 at%to 0.60 at%, more preferably from 0.35 at%to 0.45 at%, based on the total amount of atoms other than hydrogen in the second polymer; and
[0040] the content of the first polymer is from 0.03 wt%to 0.07 wt%, preferably from 0.04 wt%to 0.06 wt%, and the content of the second polymer is from 0.005 wt%to 0.07 wt%, preferably from 0.01 wt%to 0.06 wt%, based on the total weight of the composition.
[0041] In a third aspect, the present invention provides use of the polymer according to the first aspect or the composition according to the second aspect for personal care products.
[0042] In a fourth aspect, the present invention provides a method for preparing the polymer according to the first aspect, comprising the following steps:
[0043] (a) providing a capped raw material A, the capped raw material A has the following formula II:
[0044] wherein L1, L2, and M1 are as defined above with respect to the polymer according to the first aspect,
[0045] X2 is selected from -NH2, -NHR13, -SH, and -OH, wherein R13 is selected from C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably from methyl group, ethyl group, propyl group, and butyl group, and
[0046] R12 is selected from -N (R14) (R15) , -NHR14, -SR14, and -OR14, wherein R14 and R15 are each independently selected from the group consisting of: C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, optionally comprising one or more heteroatoms such as halogen, O, or S atoms; and a group represented by -C (O) -G, wherein G is as defined above with respect to the polymer according to the first aspect; and (b) reacting the capped raw material A with a polymer B to obtain said polymer, wherein the polymer B has the following formula III:
[0047] wherein R1, R2, R3, R4, and R5 are as defined above with respect to the polymer according to the first aspect, n is as defined above with respect to the polymer according to the first aspect, and M2 is selected from H and a metal ion, the metal ion is preferably selected from the group consisting of sodium, potassium, ammonium, zinc, and calcium ions.
[0048] In a fifth aspect, the present invention provides a method for preparing the composition according to the one embodiment of the second aspect, comprising mixing the first polymer with the second polymer, wherein the first polymer is prepared by the method according to the fourth aspect, and the second polymer is prepared by steps comprising:
[0049] (a’) providing a capped raw material A’ , the capped raw material A’ has the following formula II’ :
[0050] wherein L1, L2, and M1 are as defined above with respect to the second polymer, X2 is selected from -NH2, -NHR13, -SH, and -OH, wherein R13 is selected from C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably from methyl group, ethyl group, propyl group, and butyl group, and
[0051] R12 is selected from -N (R14) (R15) , -NHR14, -SR14, and -OR14, wherein R14 and R15 are each independently selected from the group consisting of: C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, optionally comprising one or more heteroatoms such as halogen, O, or S atoms; and a group represented by -C (O) -G, wherein G is as defined above with respect to the second polymer; and
[0052] (b’) reacting the capped raw material A’ with a polymer B’ to obtain the second polymer, wherein the polymer B’ has the following formula III’ :
[0053] wherein R1, R2, R3, R4, R5, and n are as defined above with respect to the second polymer, M2 is selected from H and a metal ion, the metal ion is preferably selected from the group consisting of sodium, potassium, ammonium, zinc, and calcium ions.
[0054] The inventors have found that the first polymer (i.e., the modified linear polysaccharide polymers such as hyaluronic acids comprising a diselenide group) having the structure of the formula I described above and a molecular weight in the range described above (i.e., the number average molecular weight Mn is from 20,000 to 50,000, preferably from 30,000 to 44,000, more preferably from 32,000 to 42,000, more preferably from 35,000 to 38,000) exhibits significantly improved anti-oxidation effect in addition to the properties of the polysaccharide polymers (e.g., hyaluronic acids) themselves (e.g., moisturizing property) , thereby expanding the application of the polysaccharide polymers (e.g., hyaluronic acids) . Particularly, the first polymer has better anti-oxidation effect relative to other linear polysaccharide polymers (e.g., hyaluronic acids) with the same or similar structure of other molecular weights (such as lower molecular weights) . When such modified polymers are applied in personal care products, they can improve anti-oxidation efficacy of the personal care products, simplify their formulas, and enhance their economic benefits.
[0055] The inventors have further found that, when the first polymer described above is combined with the second polymer described above having a lower molecular weight (i.e., the number average molecular weight Mn is from 1,000 to 10,000, preferably from 2,000 to 8,000, more preferably from 3,000 to 5,500, and more preferably from 3,500 to 5,000) , the two produce a synergistic effect in terms of anti-oxidation, thereby providing further improved anti-oxidation effect.
[0056] Brief Description of Figures
[0057] In order to illustrate the technical solutions of the present invention more clearly, the figures necessary for describing the examples will be briefly described below. It should be understood that these figures are intended only to facilitate those skilled in art to understand the present invention more easily and are not intended to limit the scope of the present invention.
[0058] Fig. 1 shows a Fourier Transform Infrared Absorption (FT-IR) spectrogram for the diselenide group functionalized hyaluronic acid (Se-HA) Product 1 synthesized in preparation Example 1;
[0059] Figs. 2 and 3 show the X-ray photoelectron spectroscopy (XPS) full spectrum and the narrow spectrum of Se3d for the Se-HA Product 1 synthesized in preparation Example 1, respectively; and
[0060] Figs. 4 and 5 show the X-ray photoelectron spectroscopy (XPS) full spectrum and the narrow spectrum of Se3d for the Se-HA Product 2 synthesized in preparation Example 2, respectively.Detailed Description
[0061] To make the objects, technical solutions, and beneficial technical effects of the present invention clearer, the present application will be described in detail below. It should be noted that various aspects, features, embodiments, and advantages thereof described in the present application may be compatible and / or may be combined.
[0062] Unless stated specifically, the scientific and technical terms in the description have the same meanings as generally understood by those skilled in the art.
[0063] Unless stated otherwise, the term “hyaluronic acid” as used herein should be understood to include hyaluronic acid, and hyaluronic acid derivatives (including salts, esters, ethers, amides, etc., thereof) , for example, sodium hyaluronate, potassium hyaluronate, magnesium hyaluronate, calcium hyaluronate, zinc hyaluronate, or cobalt hyaluronate, etc.
[0064] Unless stated otherwise, the term “hydrocarbon group” as used herein means any hydrocarbon group (saturated or unsaturated, aliphatic or aromatic, non-cyclic or cyclic) from which one or more hydrogen atoms have been removed; and represents any of alkyl group, alkenyl group, alkynyl group, cycloalkyl group, cycloalkenyl group, cycloalkynyl group, aryl group, aralkyl group, and alkaryl group that may optionally contain one or more heteroatoms. In one embodiment, the hydrocarbon group may contain up to around 20 carbon atoms, and in another embodiment up to around 16 carbon atoms.
[0065] Unless stated otherwise, the term “alkyl group” as used herein means any monovalent saturated linear, branched, or cyclic hydrocarbon group. Examples of alkyl group include methyl group, ethyl group, propyl group, butyl group, and cyclohexyl group. Unless stated otherwise, the term “alkylene group” as used herein means a divalent group having the same structure as an alkyl group. When isomers of “alkyl group” or “alkylene group” exist (e.g., more than 3 carbon atoms) , they may be n-, iso-, tert-, neo-, and / or other isomeric forms that may exist.
[0066] Unless stated otherwise, the term “aryl group” as used herein means any monovalent aromatic hydrocarbon group having from around 6 to around 30 carbon atoms, preferably from around 6 to around 20 carbon atoms, and more preferably from around 6 to around 18 carbon atoms. Examples of aryl group include phenyl group and naphthyl group.
[0067] Unless stated otherwise, the term “heteroatom” as used herein means any of the Group 13-17 elements except carbon and includes, for example, oxygen, nitrogen, silicon, sulfur, phosphorus, fluorine, chlorine, bromine, and iodine. The term “halogen” means at least one selected from fluorine, chlorine, bromine, and iodine. In some embodiments, the heteroatom is a halogen atom selected from fluorine, chlorine, bromine, and iodine. In some embodiments, the heteroatom is oxygen, nitrogen, or sulfur.
[0068] Unless stated otherwise, the term “substituted” as used herein means that hydrogen of a compound is replaced / substituted or hydrogen of a functional group is replaced / substituted by a substituent selected from the group consisting of:halogen (F, Br, Cl, or I) , hydroxyl group, nitro group, cyano group, amine group, azide group, amidino group, hydrazine group, hydrazone group, carbonyl group, carbamoyl group, thiol group, ester group, carboxylic acid group or salts thereof, sulfonic acid group or salts thereof, phosphoric acid group or salts thereof, C1-C30 alkyl group, C2-C30 alkenyl group, C2-C30 alkynyl group, C6-C30 aryl group, C7-C30 arylalkyl group, C1-C30 alkoxy group, C1-C20 heteroalkyl group, C3-C20 heterocyclyl group, C3-C20 heteroarylalkyl group, C3-C30 cycloalkyl group, C3-C15 cycloalkenyl group, C6-C15 cycloalkynyl group, C3-C30 heterocycloalkyl group, and any combination thereof.
[0069] It will be understood that any numerical range recited herein includes all sub-ranges within that range and any combination of the various endpoints of such ranges or sub-ranges.
[0070] Unless stated otherwise, the amounts involved herein all refer to amounts by mass, and all percentages are weight percentages based on the total composition.
[0071] The present invention relates to a polymer, a composition comprising the polymer, use thereof and a preparation method thereof. The present invention will be described in detail below.
[0072] Polymers (the first polymer)
[0073] In the first aspect, the present invention relates to a polymer (hereinafter referred to as the first polymer) , which is a modified linear polysaccharide polymer (e.g., hyaluronic acid) comprising a diselenide group and having a number average molecular weight Mn from 20,000 to 50,000, preferably from 30,000 to 44,000, more preferably from 32,000 to 42,000, more preferably from 35,000 to 38,000.
[0074] Specifically, the first polymer has the structure of following formula I:
[0075] In the formula I, each occurrence of R1, R2, R3, R4, and R5 is independently selected from H, a group represented by -L3-OH, and a group represented by -NR7-C (O) -R8. Wherein each occurrence of L3 is independently selected from a single bond and C1-C10 alkylene group, preferably from a single bond and C1-C6 alkylene group, more preferably from a single bond, methylene group, ethylene group, (n-, and / or iso-) propylene group, and (n-, iso-, and / or tert-) butylene group; each occurrence of R7 and R8 is independently selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, (n-, and / or iso-) propyl group, and (n-, iso-, and / or tert-) butyl group. Nonlimiting examples of L3 may include a single bond, methylene group, ethylene group, (n-, and / or iso-) propylene group, (n-, iso-, and / or tert-) butylene group, (n-, iso-, tert-, and / or other isomeric forms) pentylene group, (n-, iso-, tert-, and / or other other isomeric forms) hexylene group, (n-, iso-, tert-, and / or other isomeric forms) heptylene group, (n-, iso-, tert-, and / or other isomeric forms) octylene group, (n-, iso-, tert-, and / or other isomeric forms) nonylene group, and (n-, iso-, tert-, and / or other isomeric forms) decylene group. Nonlimiting examples of R7 and R8 may include H, methyl group, ethyl group, (n-, and / or iso-) propyl group, (n-, iso-, and / or tert-) butyl group, (n-, iso-, tert-, and / or other isomeric forms) pentyl group, (n-, iso-, tert-, and / or other isomeric forms) hexyl group, (n-, iso-, tert-, and / or other isomeric forms) heptyl group, (n-, iso-, tert-, and / or other isomeric forms) octyl group, (n-, iso-, tert-, and / or other isomeric forms) nonyl group, and (n-, iso-, tert-, and / or other isomeric forms) decyl group. L3, R7, and R8 may each optionally comprise at least one heteroatom such as halogen, O, N, and / or S atoms.
[0076] In one embodiment, each occurrence of R1, R2, and R4 is a group represented by -L3-OH, wherein each occurrence of L3 is independently selected from a single bond and C1-C10 alkylene group, preferably from a single bond and C1-C6 alkylene group, more preferably from a single bond, methylene group, ethylene group, propylene group, and butylene group. In further embodiments, R1 and R2 are -OH, and R4 is a group represented by -L3-OH, wherein L3 is C1-C10 alkylene group, preferably C1-C6 alkylene group, more preferably selected from methylene group, ethylene group, propylene group, and butylene group. In still further embodiments, R1 and R2 are -OH, and R4 is a group represented by -L3-OH, wherein L3 is methylene group or ethylene group.
[0077] In one embodiment, R3 is -OH.
[0078] In one embodiment, R5 is a group represented by -NR7-C (O) -R8, wherein each occurrence of R7 and R8 is independently selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, propyl group, and butyl group. In further embodiments, R5 is a group represented by -NR7-C (O) -R8, wherein R7 is H, and R8 is C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably selected from methyl group, ethyl group, propyl group, and butyl group. In still further embodiments, R5 is a group represented by -NR7-C (O) -R8, wherein R7 is H, and R8 is methyl or ethyl.
[0079] In the formula I, each occurrence of Z is independently selected from the group consisting of:
[0080] - a group represented by -OM2, wherein M2 is selected from H and a metal ion, the metal ion is preferably selected from the group consisting of sodium, potassium, ammonium, zinc, and calcium ions; or
[0081] - a group represented by -X1-L1-M1-L2-R6.
[0082] In the formula -X1-L1-M1-L2-R6 above, each occurrence of L1 and L2 is independently selected from C1-C10 alkylene group, preferably from C1-C6 alkylene group, more preferably from methylene group, ethylene group, propylene group, and butylene group. Nonlimiting examples of L1 and L2 may include methylene group, ethylene group, (n-, and / or iso-) propylene group, (n-, iso-, and / or tert-) butylene group, (n-, iso-, tert-, and / or other isomeric forms) pentylene group, (n-, iso-, tert-, and / or other isomeric forms) hexylene group, (n-, iso-, tert-, and / or other isomeric forms) heptylene group, (n-, iso-, tert-, and / or other isomeric forms) octylene group, (n-, iso-, tert-, and / or other isomeric forms) nonylene group, and (n-, iso-, tert-, and / or other isomeric forms) decylene group. L1 and L2 may each optionally comprise at least one heteroatom such as halogen, O, N, and / or S atoms.
[0083] In one embodiment, L1 and L2 are selected from the group consisting of methylene group, ethylene group, propylene group, and butylene group, for example, methylene group or ethylene group.
[0084] In the formula -X1-L1-M1-L2-R6 above, each occurrence of X1 is selected from -NR9-, -S-, and -O-, wherein R9 is selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, (n-, and / or iso-) propyl group, and (n-, iso-, and / or tert-) butyl group. Nonlimiting examples of R9 may include H, methyl group, ethyl group, (n-, and / or iso-) propyl group, (n-, iso-, and / or tert-) butyl group, (n-, iso-, tert-, and / or other isomeric forms) pentyl group, (n-, iso-, tert-, and / or other isomeric forms) hexyl group, (n-, iso-, tert-, and / or other isomeric forms) heptyl group, (n-, iso-, tert-, and / or other isomeric forms) octyl group, (n-, iso-, tert-, and / or other isomeric forms) nonyl group, and (n-, iso-, tert-, and / or other isomeric forms) decyl group. R9 may optionally comprises at least one heteroatom such as halogen, O, N, and / or S atoms.
[0085] In one embodiment, X1 is -NR9-, wherein R9 is selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, propyl group, and butyl group. In further embodiments, X1 is -NH-.
[0086] In the formula -X1-L1-M1-L2-R6 above, each occurrence of R6 is selected from -N (R10) (R11) , -SR10, and -OR10, wherein R10 and R11 are each independently selected from the group consisting of:
[0087] - H;
[0088] - C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, optionally comprising one or more heteroatoms such as halogen, O, or S atoms; and
[0089] - a group represented by -C (O) -G, wherein each occurrence of G is selected from the group consisting of: C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, (n-, and / or iso-) propyl group or (n-, iso-, and / or tert-) group, optionally comprising one or more heteroatoms such as halogen, O, or S atoms; C6-C30 aromatic hydrocarbon group, preferably phenyl group unsubstituted or substituted by one or more C1-C10 alkyl groups, preferably C1-C4 alkyl groups; and a group represented by-L4-C (O) -OR16, wherein L4 is selected from a single bond and C1-C10 alkylene group, preferably from a single bond and C1-C6 alkylene group, more preferably from a single bond, methylene group, ethylene group, (n-, and / or iso-) propylene group, and (n-, iso-, and / or tert-) butylene group, R16 is selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, (n-, and / or iso-) propyl group, and (n-, iso-, and / or tert-) butyl group.
[0090] In one embodiment, R6 is -NH2.
[0091] In one embodiment, R6 is -NHR10, wherein R10 is C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, for example, methyl group.
[0092] In one embodiment, R6 is -N (R10) (R11) , wherein R10 and R11 are each independently selected from C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, for example, methyl group.
[0093] In one embodiment, R6 is -NHR10, wherein R10 is a group represented by -C (O) -G, wherein G is C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, optionally comprising one or more heteroatoms such as halogen, O, or S atoms. In a further embodiment, R6 is -NHR10, wherein R10 is a group represented by -C (O) -G, wherein G is C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group. In another further embodiment, R6 is -NHR10, wherein R10 is a group represented by -C (O) -G, wherein G is C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, substituted by at least one halogen atom, for example, C1-C6 alkyl group substituted by three halogen atoms (e.g., F or Cl atoms) .
[0094] In one embodiment, R6 is -N (R10) (R11) , wherein R10 and R11 are each independently a group represented by -C (O) -G, wherein G is C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, optionally comprising one or more heteroatoms such as halogen, O, or S atoms. In a further embodiment, R6 is -N (R10) (R11) , wherein R10 and R11 are each independently a group represented by -C (O) -G, wherein G is C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group. In another further embodiment, R6 is -N (R10) (R11) , wherein R10 and R11 are each independently a group represented by -C (O) -G, wherein G is C1-C10 alkyl group , preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, substituted by at least one halogen atom, for example, C1-C6 alkyl group substituted by three halogen atoms (e.g., F or Cl atoms) .
[0095] In one embodiment, R6 is -NHR10, wherein R10 is a group represented by -C (O) -G, wherein G is C6-C30 aromatic hydrocarbon group, preferably phenyl group unsubstituted or substituted by one or more C1-C10 alkyl groups, preferably C1-C4 alkyl groups, for example, benzyl group, phenylethyl group, dimethylphenyl group, etc.
[0096] In one embodiment, R6 is -N (R10) (R11) , wherein R10 and R11 are each independently a group represented by -C (O) -G, wherein G is C6-C30 aromatic hydrocarbon group, preferably phenyl group unsubstituted or substituted by one or more C1-C10 alkyl groups, preferably C1-C4 alkyl groups, for example, benzyl group, phenylethyl group, dimethylphenyl group, etc.
[0097] In one embodiment, R6 is -NHR10, wherein R10 is a group represented by -L4-C (O) -OR16, wherein L4 is selected from a single bond and C1-C10 alkylene group, preferably from a single bond and C1-C6 alkylene group, more preferably from a single bond, methylene group, ethylene group, propylene group, and butylene group, R16 is selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, propyl group, and butyl group. In a further embodiment, R6 is -NHR10, wherein R10 is a group represented by -C (O) -OR16, wherein R16 is selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, propyl group, and butyl group.
[0098] In one embodiment, R6 is -N (R10) (R11) , wherein R10 and R11 are each independently a group represented by -L4-C (O) -OR16, wherein L4 is selected from a single bond and C1-C10 alkylene group, preferably from a single bond and C1-C6 alkylene group, more preferably from a single bond, methylene group, ethylene group, propylene group, and butylene group, R16 is selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, propyl group, and butyl group. In a further embodiment, R6 is -N (R10) (R11) , wherein R10 and R11 are each independently a group represented by -C (O) -OR16, wherein R16 is selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, propyl group, and butyl group.
[0099] In the formula -X1-L1-M1-L2-R6 above, M1 is a group represented by - (Se) o- [L5- (Se) p] q-and M1 comprises at least one Se-Se bond. Wherein o is 1-10, for example, 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, preferably 2-5. p is 1-10, for example, 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, preferably 2-5. q is 0-10, for example, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, preferably 0-5. Each occurrence of L5 is independently selected from C1-C10 alkylene group, preferably from C1-C6 alkylene group, more preferably from methylene group, ethylene group, (n-, and / or iso-) propylene group, and (n-, iso-, and / or tert-) group butylene. Nonlimiting examples of L5 may include methylene group, ethylene group, (n-, and / or iso-) propylene group, (n-, iso-, and / or tert-) butylene group, (n-, iso-, and / or tert-) pentylene group, (n-, iso-, and / or tert-) hexylene group, (n-, iso-, and / or tert-) heptylene group, (n-, iso-, and / or tert-) octylene group, (n-, iso-, and / or tert-) nonylene group, and (n-, iso-, and / or tert-) decylene group. L5 may optionally comprises at least one heteroatom, for example, halogen, O, N, and / or S atoms.
[0100] In one embodiment, M1 is -Se-Se-.
[0101] In the first polymer, the proportion of the number of the repeating units in which Z is the group represented by -X1-L1-M1-L2-R6 to the number of all repeating units, in other words, the grafting rate, may be from 1%to 10%, preferably from 4%to 7%. For example, in the first polymer, the proportion of the number of the repeating units in which Z is the group represented by -X1-L1-M1-L2-R6 to the number of all repeating units is 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, or a range defined by any two thereof.
[0102] In the formula I, n has a value such that the polymer has a number average molecular weight Mn from 20,000 to 50,000, preferably from 30,000 to 44,000, more preferably from 32,000 to 42,000, more preferably from 35,000 to 38,000, for example, such that the first polymer has a number average molecular weight Mn of 20,000, 21,000, 22,000, 23,000, 24,000, 25,000, 26,000, 27,000, 28,000, 29,000, 30,000, 31,000, 32,000, 33,000, 34,000, 35,000, 36,000, 37,000, 38,000, 39,000, 40,000, 41,000, 42,000, 43,000, 44,000, 45,000, 46,000, 47,000, 48,000, 49,000, 50,000, or a range defined by any two thereof.
[0103] In the polymer, the atomic content of element Se may be from 0.10 at%to 10.00 at%, preferably from 0.15 at%to 0.50 at%, more preferably from 0.20 at%to 0.30 at%, based on the total amount of atoms other than hydrogen in the polymer. For example, the atomic content of element Se in the polymer may be 0.10 at%, 0.15 at%, 0.20 at%, 0.25 at%, 0.30 at%, 0.35 at%, 0.40 at%, 0.45 at%, 0.50 at%, 0.55 at%, 0.60 at%, 0.65 at%, 0.70 at%, 0.75 at%, 0.80 at%, 0.85 at%, 0.90 at%, 1.00 at%, 2.00 at%, 3.00 at%, 4.00 at%, 5.00 at%, 6.00 at%, 7.00 at%, 8.00 at%, 9.00 at%, 10.00 at%, or a range defined by any two thereof, based on the total amount of atoms other than hydrogen in the polymer.
[0104] The polymer of the formula I may be derived from hyaluronic acid or a salt thereof such as metal salt, for example, sodium, potassium, ammonium, zinc and / or calcium salts of hyaluronic acids.
[0105] The inventors have found that the modified polysaccharide polymers (e.g., hyaluronic acids) satisfying the structure of the formula I above exhibit, in addition to properties (e.g., moisturizing property) of the polysaccharide polymers (e.g., hyaluronic acids) themselves, significantly improved anti-oxidation effect as compared with modified polysaccharide polymers (e.g., of the same or similar structure) of other molecular weights (e.g., lower molecular weights) (e.g., the second polymer to be described hereinafter) , even in the case where the content of Se (or grafting rate of the corresponding Se-containing side chains) contained therein is lower than that of modified polysaccharide polymers (e.g., of the same or similar structure) of other molecular weights (e.g., lower molecular weights) (e.g., the second polymer to be described hereinafter) . Also, the above-mentioned modified polysaccharide polymers (e.g., hyaluronic acids) according to the present invention have better anti-oxidation effect than the modified polysaccharide polymers with a crosslinked structure (e.g., a structure crosslinked by being linked to both sides of the diselenide group) due to their particular grafting manner of being linked to only one side of the diselenide group.
[0106] In a preferred embodiment, the formula I satisfies one or more of the following conditions (i) to (iv) , preferably satisfies all of the following conditions (i) to (iv) :
[0107] (i) R1 and R2 are -OH;
[0108] (ii) R3 is -OH;
[0109] (iii) R4 is a group represented by -L3-OH, wherein L3 is C1-C10 alkylene group, preferably C1-C6 alkylene group, more preferably selected from methylene group, ethylene group, propylene group, and butylene group, for example, methylene group; and
[0110] (iv) R5 is a group represented by -NR7-C (O) -R8, wherein R7 is H, and R8 is C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably selected from methyl group, ethyl group, propyl group, and butyl group, for example, methyl group.
[0111] In a preferred embodiment, the formula I satisfies one or more of the following conditions (v) to (viii) , preferably satisfies all of the following conditions (v) to (viii) :
[0112] (v) L1 and L2 are each independently C1-C10 alkylene group, preferably C1-C6 alkylene group, more preferably selected from methylene group, ethylene group, propylene group, and butylene group, for example, ethylene group;
[0113] (vi) X1 is -NR9-, wherein R9 is selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, propyl group, and butyl group, for example, H;
[0114] (vii) R6 is -N (R10) (R11) -, wherein R10 and R11 are each independently selected from the group consisting of:
[0115] - H;
[0116] - C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, optionally substituted by one or more halogen atoms such as F; and
[0117] - a group represented by -C (O) -G, wherein G is: C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, optionally substituted by one or more heteroatoms such as halogen atoms; phenyl group unsubstituted or substituted by one or more C1-C4 alkyl groups; or a group represented by -L4-C (O) -OH, wherein L4 is C1-C10 alkylene group, preferably selected from a single bond and C1-C6 alkylene group, more preferably from a single bond, methylene group, ethylene group, propylene group, and butylene group, for example, ethylene group; and
[0118] (viii) M1 is -Se-Se-.
[0119] Composition
[0120] In the second aspect, the present invention relates to a composition comprising the first polymer according to the first aspect. The description of the first polymer is the same as above and will not be repeated here.
[0121] In one embodiment, the content of the first polymer is not particularly limited and may be suitably selected according to the intended purposes. For example, it may be 0.01-99.9 wt%, for example, 0.01-50.0 wt%, for example, 0.01-20.0 wt%, for example, 0.01-10.0 wt%, for example, 0.01-5.0 wt%, for example, 0.01-2.0 wt%, preferably from 0.01 wt%to 1.00 wt%, more preferably from 0.01 wt%to 0.10 wt%, based on the total weight of the composition. For example, based on the total weight of the composition, the content of the first polymer may be 0.01 wt%, 0.02 wt%, 0.05 wt%, 0.10 wt%, 0.15 wt%, 0.20 wt%, 0.25 wt%, 0.30 wt%, 0.35 wt%, 0.40 wt%, 0.45 wt%, 0.50 wt%, 0.55 wt%, 0.60 wt%, 0.65 wt%, 0.70 wt%, 0.75 wt%, 0.80 wt%, 0.85 wt%, 0.90 wt%, 0.95 wt%, 1.00 wt%, 1.5 wt%, 2.0 wt%, 2.5 wt%, 3.0 wt%, 3.5 wt%, 4.0 wt%, 4.5 wt%, 5.0 wt%, 5.5 wt%, 6.0 wt%, 6.5 wt%, 7.0 wt%, 7.5 wt%, 8.0 wt%, 8.5 wt%, 9.0 wt%, 9.5 wt%, 10.0 wt%, 15.0 wt%, 20.0 wt%, 25.0 wt%, 30.0 wt%, 35.0 wt%, 40.0 wt%, 45.0 wt%, 50.0 wt%, 55.0 wt%, 60.0 wt%, 65.0 wt%, 70.0 wt%, 75.0 wt%, 80.0 wt%, 85.0 wt%, 90.0 wt%, 95.0 wt%, 98.0 wt%, 99.0 wt%, 99.5 wt%, 99.9 wt%, or a range defined by any two thereof.
[0122] In a preferred embodiment, the composition comprises the first polymer, and the composition further comprises a second polymer. The second polymer has the same or similar structure represented by the formula I as the first polymer described above, but has a different molecular weight from the first polymer. All of the above description of the first polymer except for the molecular weight applies to the second polymer.
[0123] Specifically, the second polymer has the structure represented by the following formula I’ ,
[0124] In the formula I’ , R1, R2, R3, R4, R5, and Z are each the same as defined above with respect to the formula I.
[0125] In the formula I’ , n has a value such that the second polymer has a number average molecular weight Mn from 1,000 to 10,000, preferably from 2,000 to 8,000, more preferably from 3,000 to 5,500, more preferably from 3,500 to 5,000, for example, such that the second polymer has a number average molecular weight Mn of 1,000, 1,500, 2,000, 2,500, 3,000, 3,500, 4,000, 4,500, 5,000, 5,500, 6,000, 6,500, 7,000, 7,500, 8,000, 8,500, 9,000, 9,500, 10,000, or a range defined by any two thereof.
[0126] In the second polymer, the atomic content of element Se may be from 0.10 at%to 10.00 at%, preferably from 0.30 at%to 0.60 at%, more preferably from 0.35 at%to 0.45 at%, based on the total amount of atoms other than hydrogen in the polymer. For example, the atomic content of element Se in the second polymer may be 0.10 at%, 0.15 at%, 0.20 at%, 0.25 at%, 0.30 at%, 0.35 at%, 0.40 at%, 0.45 at%, 0.50 at%, 0.55 at%, 0.60 at%, 0.65 at%, 0.70 at%, 0.75 at%, 0.80 at%, 0.85 at%, 0.90 at%, 1.00 at%, 2.00 at%, 3.00 at%, 4.00 at%, 5.00 at%, 6.00 at%, 7.00 at%, 8.00 at%, 9.00 at%, 10.00 at%, or a range defined by any two thereof, based on the total amount of atoms other than hydrogen in the polymer.
[0127] In the second polymer, the proportion of the number of the repeating units in which Z is the group represented by -X1-L1-M1-L2-R6 to the number of all repeating units, in other words, the grafting rate, may be from 10%to 40%, preferably from 20%to 30%. For example, in the second polymer, the proportion of the number of the repeating units in which Z is the group represented by -X1-L1-M1-L2-R6 to the number of all repeating units is 10%, 15%, 20%, 25%, 30%, 35%, 40%, or a range defined by any two thereof.
[0128] In one embodiment, the second polymer has the same structure as the first polymer (i.e., the substitution patterns in the formula I and formula I’a re the same, that is to say, the substituents at each corresponding substitution position are the same) except for a different molecular weight.
[0129] The polymer of formula I’ may be derived from hyaluronic acid or a salt thereof such as metal salt, for example, sodium, potassium, ammonium, zinc and / or calcium salt of hyaluronic acid.
[0130] In one embodiment, in the composition, the content of the first polymer may be from 0.03 wt%to 0.07 wt%, preferably from 0.04 wt%to 0.06 wt%, and the content of the second polymer may be 0.005 wt%-0.07 wt%, preferably from 0.01 wt%to 0.06 wt%, based on the total weight of the composition. For example, based on the total weight of the composition, the content of the first polymer may be 0.03 wt%, 0.04 wt%, 0.05 wt%, 0.06 wt%, 0.07 wt%, or a range defined by any two thereof. For example, based on the total weight of the composition, the content of the second polymer may be 0.005 wt%, 0.006 wt%, 0.007 wt%, 0.008 wt%, 0.009 wt%, 0.01 wt%, 0.02 wt%, 0.03 wt%, 0.04 wt%, 0.05 wt%, 0.06 wt %, 0.07 wt%, or a range defined by any two thereof.
[0131] The inventors have found that, when the composition as described above comprises the first polymer and the second polymer at the same time, the two produce a synergistic effect in terms of anti-oxidation, thereby achieving further improved anti-oxidation effects.
[0132] In a further preferred embodiment, the content of the first polymer is 0.04 wt%, and the content of the second polymer is 0.005 wt%-0.07 wt%, preferably from 0.01 wt%to 0.06 wt%, based on the total weight of the composition; or the content of the first polymer is 0.06 wt%, and the content of the second polymer is 0.05 wt%-0.07 wt%, preferably 0.06 wt%, based on the total weight of the composition.
[0133] In addition to the above-mentioned polymers, the composition may comprise one or more other ingredients according to actual needs.
[0134] In one embodiment, the composition may further comprise a solvent. The solvent may be a physiologically acceptable solvent suitable for personal care products. The solvent may comprise or be water and / or an organic solvent (including solvents miscible with water, for example, alcohols, such as monohydric alcohols, e.g., ethanol, isopropanol, benzyl alcohol, etc., polyhydric alcohols, e.g., ethanediol, propanediol, butanediol, pentanediol, hexanediol, heptanediol, octanediol, glycerol, etc., or any combination thereof) , preferably water. The solvent may be a single solvent or a mixture of two or more solvents. The (total) content of the solvent is not particularly limited and may be suitably selected according to the intended purposes, and may be for example, 10.0-99.9 wt%, for example, from 20.0 wt%to 99.9 wt%, for example, from 50.0 wt%to 99.9 wt%, for example, from 80.0 wt%to 99.9 wt%, based on the total weight of the composition. For example, the total content of the solvent may be 10.0 wt%, 15.0 wt%, 20.0 wt%, 25.0 wt%, 30.0 wt%, 35.0 wt%, 40.0 wt%, 45.0 wt%, 50.0 wt%, 55.0 wt%, 60.0 wt%, 65.0 wt%, 70.0 wt%, 75.0 wt%, 80.0 wt%, 85.0 wt%, 90.0 wt%, 95.0 wt%, 98.0 wt%, 99.0 wt%, 99.5 wt%, 99.8 wt%, 99.9 wt%, or a range defined by any two thereof, based on the total weight of the composition. When the solvent is a mixture of two or more solvents (e.g., water and alcohols) , the content of each solvent (component) is not limited and may be suitably selected in accordance with the intended purposes, for example, may each independently be 0.1-99.8%, for example, 0.1 wt%, 0.2 wt%, 0.5 wt%, 1.0 wt%, 1.5 wt%, 2.0 wt%, 3.0 wt%, 4.0 wt%, 5.0 wt%, 6.0 wt%, 7.0 wt%, 8.0 wt%, 9.0 wt%, 10.0 wt%, 15.0 wt%, 20.0 wt%, 25.0 wt%, 30.0 wt%, 35.0 wt%, 40.0 wt%, 45.0 wt%, 50.0 wt%, 55.0 wt%, 60.0 wt%, 65.0 wt%, 70.0 wt%, 75.0 wt%, 80.0 wt%, 85.0 wt%, 90.0 wt%, 95.0 wt%, 98.0 wt%, 98.5 wt%, 99.0 wt%, 99.5 wt%, 99.8 wt%, or a range defined by any two thereof, based on the total weight of the composition.
[0135] In one embodiment, the composition may further comprises one or more ingredients selected from the group consisting of: humectants, for example, glycerol, hyaluronic acid, glucose polyether, glycerol polyether; surfactants, for example, cationic surfactants, anionic surfactants, nonionic surfactants, silicone surfactants, amphoteric surfactants, polymeric surfactants; rheology modifiers, for example, polyamides, acrylic polymers, xanthan gum, sclerotium gum, silicone polymers; oils and esters, for example, mineral oils, petrolatum, synthetic oils and esters, vegetable oils, ferment oils; waxes, for example, ozocerite, beeswax, synthetic waxes, natural waxes; salts, for example, salts of ethylene diamine tetra-acetic acid, sodium chloride, magnesium sulphate; pH modifiers, for example, sodium hydroxide, potassium hydroxide, citric acid, hydrochloric acid; organic acids, for example, salicylic acid, glycolic acid, ferulic acid, mandelic acid, azelaic acid; preservatives, for example, phenoxyethanol, chlorphenesin; antioxidants, for example, BHT, vitamin E, tocopheryl acetate; inorganic compound powders, for example, iron oxides, titanium dioxide, zinc dioxide, cerium dioxide, silicon dioxide, bismuth oxychloride, calcium carbonate, hydroxyapatite; and colorants. The amount of each of the ingredients is not particularly limited and may each be independently appropriately selected according to the intended use, for example, the amount of each of the ingredients may each be independently 0.05-10 wt%, for example, 0.05 wt%, 0.1 wt%, 0.2 wt%, 0.3 wt%, 0.4 wt%, 0.5 wt%, 1 wt%, 1.5 wt%, 2 wt%, 2.5 wt%, 3 wt%, 3.5 wt%, 4 wt%, 4.5 wt%, 5 wt%, 5.5 wt%, 6 wt%, 6.5 wt%, 7 wt%, 7.5 wt%, 8 wt%, 8.5 wt%, 9 wt%, 9.5 wt%, 10 wt%, or a range defined by any two thereof, based on the total weight of the composition.
[0136] In one embodiment, the composition may be a personal care product composition.
[0137] Use
[0138] In the third aspect, the present invention provides the use of the polymer according to the first aspect or the composition according to the second aspect for personal care products.
[0139] The polymer according to the first aspect or the composition according to the second aspect is particularly suitable for preparing personal care products. When the polymer according to the first aspect or the composition according to the second aspect is used in the preparation of personal care products, because the polymer or the composition possesses excellent anti-oxidation effect and moisturizing effect at the same time, the efficacies of the personal care products can be enhanced and the formulas and preparation of the personal care products can be greatly simplified.
[0140] However, the use of the polymer according to the first aspect or the composition according to the second aspect is not particularly limited, for example, the composition may be used for other applications where both anti-oxidation efficacy and moisturizing efficacy are desired.
[0141] Method for preparing the first polymer
[0142] In the fourth aspect, the present invention provides a method for preparing the polymer according to the first aspect.
[0143] Specifically, the method comprises the following steps:
[0144] (a) providing a capped raw material A, the capped raw material A has the following formula II:
[0145] wherein L1, L2, and M1 are as defined above with respect to the polymer according to the first aspect,
[0146] X2 is selected from -NH2, -NHR13, -SH, and -OH, wherein R13 is selected from C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably selected from methyl group, ethyl group, (n-, and / or iso-) propyl group, and (n-, iso-, and / or tert-) butyl group; R13 may be the same as described above for R9 in the group -NR9 with respect to the group X1 of the formula I of the polymer of the first aspect; and
[0147] R12 is selected from -N (R14) (R15) , -NHR14, -SR14, and -OR14, wherein R14 and R15 are each independently selected from the group consisting of: C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, (n-, and / or iso-) propyl group or (n-, iso-, and / or tert-) butyl group, optionally comprising one or more heteroatoms such as halogen, O, or S atoms; and a group represented by -C (O) -G, wherein G is as defined above with respect to the polymer according to the first aspect; R12 may be the same as described above for the group R6 of the formula I of the polymer according to the first aspect (e.g., in case where the R12 group is removed without deprotecting the N, O, or S atoms to which the R12 group is attached after the completion) or may be different (e.g., in case where the R12 group is removed with deprotecting the N, O, or S atoms to which the R12 group is attached after the completion of the reaction) ; and
[0148] (b) reacting the capped raw material A with a polymer B to obtain the polymer, wherein the polymer B has the following formula III:
[0149] wherein R1, R2, R3, R4, R5, and n are as defined above with respect to the polymer according to the first aspect, and M2 is selected from H and a metal ion, the metal ion is preferably selected from the group consisting of sodium, potassium, ammonium, zinc, and calcium ions.
[0150] The polymer B may be hyaluronic acid or metal salts thereof, for example, sodium, potassium, ammonium, zinc and / or calcium salts of hyaluronic acid. In step (b) , the time period of reacting the capped raw material A and the polymer B is not particularly limited and may be suitably selected as desired. For example, the reaction time may be 5-40 hours, such as 5, 10, 15, 20, 25, 30, 40 hours, or a range defined by any two thereof.
[0151] In step (b) , the temperature at which the capped raw material A is reacted with the polymer B is not particularly limited and may be suitably selected as desired. For example, the reaction temperature may be 30-90 ℃, such as 30, 40, 50, 60, 70, 80, 90 ℃, or a range defined by any two thereof.
[0152] In step (b) , the reaction of the capped raw material A with the polymer B may be carried out in the presence of an activator, the activator is not particularly limited and may be suitably selected as desired. For example, the activator may be N-hydroxy succinimide and / or 1- (3-dimethylaminopropyl) -3-ethylcarbodiimide. In step (b) , in order to obtain a modified polymer with a linear structure, the capped raw material A may be in excess relative to the polymer B. In a preferred embodiment, the molar equivalent of the polymer B relative to the capped raw material A is from 0.01 eq. to 0.50 eq., in particular from 0.10 eq. to 0.20 eq., for example, 0.01, 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50 eq.
[0153] The capped raw material A may be a commercially available product or may be obtained by self-synthesis. In the latter case, the method may be carried out by first capping a modifier raw material with two terminal reactive groups capable of reacting with a carboxyl group, so that one of the two terminal reactive groups of the modifier raw material is capped, thereby obtaining a capped modifier raw material; and then reacting the capped modifier raw material with a polysaccharide polymer containing a carboxyl group, thereby obtaining a linear polysaccharide polymer grafted with a modifier, i.e., the first polymer described hereinbefore.
[0154] Thus, in an embodiment, the capped raw material A is obtained by the following steps:
[0155] (c) providing a raw material A having the following formula IV:
[0156] wherein L1, L2, and M1 are as defined above with respect to the formula I of the polymer of the first aspect of the present invention.
[0157] X2, and X2’ are each independently selected from -NH2, -NHR13, -SH, and -OH, wherein R13 is selected from C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably from methyl group, ethyl group, (n-, and / or iso-) propyl group, and (n-, iso-, and / or tert-) butyl group; R13 may be the same as described above for R9 in the group -NR9 with respect to the group X1 of the formula I of the polymer of the first aspect; and
[0158] (d) reacting the raw material A with a capping agent such that one of X2 and X2’ is capped to obtain the capped raw material A, preferably the molar equivalent of the capping agent relative to the raw material A is from 0.08 eq. to 1.50 eq., preferably 1.00 eq.
[0159] The choice of the raw material A is not particularly limited as long as it has reactive groups capable of reacting with the carboxyl group at both ends and comprises a diselenide group. In a preferred embodiment, the raw material A is selenocystamine.
[0160] The choice of the capping agent is not particularly limited as long as it can cap the terminal groups of the raw material A. In a preferred embodiment, the capping agent is selected from the group consisting of succinic anhydride, acetic anhydride, formaldehyde, ethyl trifluoroacetate, and acyl chlorides such as benzoyl chloride or methyl phthalate formyl chloride.
[0161] In step (d) , the time period of reacting the raw material A with the capping agent is not particularly limited and may be suitably selected as desired. For example, the reaction time may be 1-20 hours, such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 hours, or a range defined by any two thereof.
[0162] In step (d) , the temperature at which the raw material A is reacted with the capping agent is not particularly limited and may be suitably selected as desired. For example, the reaction temperature may be 30-90℃, such as 30, 40, 50, 60, 70, 80, 90℃, or a range defined by any two thereof.
[0163] In step (d) , the reaction of the raw material A with the capping agent may be carried out in a solvent. The solvent is not particularly limited and may be suitably selected as desired. For example, the reaction solvent may be N, N-Dimethylformamide (DMF) .
[0164] In step (d) , the reaction of the raw material A with the capping agent may be carried out in the presence of an activator. The activator is not particularly limited and may be suitably selected as desired. For example, the activator may be triethylamine.
[0165] In step (d) , the molar equivalent of the capping agent relative to the raw material A may be from 0.08 eq. to 1.50 eq., preferably 1.00 eq., for example: 0.08, 0.09, 0.10, 0.20, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90, 1.00, 1.10, 1.20, 1.30, 1.40, 1.50 eq.
[0166] The inventors have found that the diselenide group functionalized modified polysaccharide polymers (e.g., hyaluronic acids) with a linear structure are obtained by the preparation method described above. The modified polysaccharide polymers (e.g., hyaluronic acids) have a significantly improved anti-oxidation capacity in addition to the properties (e.g., moisturizing property) of the polysaccharide polymers themselves.
[0167] Methods for preparing a composition comprising the first and second polymers In the fifth aspect, the present invention provides a method for preparing a composition comprising the first polymer and the second polymer described above.
[0168] The method comprises mixing the first polymer with the second polymer. The description of the first polymer and the second polymer are each the same as described above.
[0169] The first polymer may be prepared by the method according to the fourth aspect.
[0170] The second polymer may be prepared by the same preparing method as that for preparing the first polymer (i.e. the method according to the fourth aspect) , except for that the polymer B is replaced by a polymer B’ with a different molecular weight from the polymer B. Accordingly, the above description of the method according to the fourth aspect for preparing the first polymer also applies to the preparation of the second polymer, except for that the polymer B is replaced by a corresponding polymer B’ of a different molecular weight.
[0171] Specifically, the second polymer may be prepared by the following steps:
[0172] (a’ ) providing a capped raw material A’ , the capped raw material A’ has the following formula II’ :
[0173] wherein L1, L2, and M1 are as defined above with respect to the second polymer (of formula I’ ) ,
[0174] X2 is selected from -NH2, -NHR13, -SH, and -OH, wherein R13 is selected from C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably from methyl group, ethyl group, propyl group, and butyl group, and
[0175] R12 is selected from -N (R14) (R15) , -NHR14, -SR14, and -OR14, wherein R14 and R15 are each independently selected from the group consisting of: C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, optionally comprising one or more heteroatoms such as halogen, O, or S atoms; and a group represented by -C (O) -G, wherein G is as defined above with respect to the second polymer (of formula I’ ) , in other words, the description of L1, L2, M1, X2, and R12 may each be the same as the description of L1, L2, M1, X2, and R12 with respect to the formula II, respectively; and
[0176] (b’ ) reacting the capped raw material A’ with a polymer B’ to obtain the second polymer, wherein the polymer B’ has the following formula III’ :
[0177] wherein R1, R2, R3, R4, R5, and n are as defined above with respect to the formula I’ according to the second polymer, M2 is selected from H and a metal ion, the metal ion is preferably selected from the group consisting of sodium, potassium, ammonium, zinc, and calcium ions,
[0178] in other words, the description of R1, R2, R3, R4, R5, M2 may each be the same as the description of R1, R2, R3, R4, R5, and M2 with respect to the formula III, respectively.
[0179] The polymer B’ may be hyaluronic acid or a metal salt thereof, such as sodium, potassium, ammonium, zinc and / or calcium salt of hyaluronic acid.
[0180] In step (b’ ) , the time period of reacting the capped raw material A’ with the polymer B’ is not particularly limited and may be suitably selected as desired. For example, the reaction time may be 5-40 hours, such as 5, 10, 15, 20, 25, 30, 40 hours, or a range defined by any two thereof.
[0181] In step (b’ ) , the temperature at which the capped raw material A’ is reacted with the polymer B’ is not particularly limited and may be suitably selected as desired. For example, the reaction temperature may be 30-90 ℃, such as 30, 40, 50, 60, 70, 80, 90 ℃, or a range defined by any two thereof.
[0182] In step (b’ ) , the reaction of the capped raw material A’ with the polymer B’ may be carried out in the presence of an activator. The activator is not particularly limited and may be suitably selected as desired. For example, the activator may be N-hydroxy succinimide and / or 1- (3-dimethylaminopropyl) -3-ethylcarbodiimide.
[0183] In step (b’ ) , in order to obtain a modified polymer with a linear structure, the capped raw material A’ may be in excess relative to the polymer B’ . In a preferred embodiment, the molar equivalent of the polymer B’ relative to the capped raw material A’ is from 0.01 eq. to 0.50 eq., in particular from 0.10 eq. to 0.20 eq., for example: 0.01, 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50 eq.
[0184] In one embodiment, the capped raw material A’ is obtained by the following steps:
[0185] (c’ ) providing a raw material A’ having the following formula IV’ :
[0186] wherein L1, L2, and M1 are as defined above in the formula I’ with respect to the second polymer,
[0187] X2 and X2’ are each independently selected from -NH2, -NHR13, -SH, and -OH, wherein R13 is selected from C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably from methyl group, ethyl group, propyl group, and butyl group, in other words, the description of the formula IV’ with respect to the raw material A’ may be the same as the description of the formula IV with respect to the raw material A; and
[0188] (d’ ) reacting the raw material A’ with a capping agent such that one of X2 and X2’ is capped to obtain the capped raw material A’ , preferably the molar equivalent the capping agent relative to the raw material A’ is from 0.08 eq. to 1.50 eq., preferably 1.00 eq.
[0189] The choice of the raw material A’ is not particularly limited as long as it has reactive groups capable of reacting with the carboxyl group at both ends and comprises a diselenide group. In a preferred embodiment, the raw material A’ is selenocystamine.
[0190] The choice of the capping agent is not particularly limited as long as it can cap the terminal groups of the raw material A’ . In a preferred embodiment, the capping agent is selected from the group consisting of succinic anhydride, acetic anhydride, formaldehyde, ethyl trifluoroacetate, and acyl chlorides such as benzoyl chloride or methyl phthalate formyl chloride.
[0191] In step (d’ ) , the time period of reacting the raw material A’ with the capping agent is not particularly limited and may be suitably selected as desired. For example, the reaction time may be 1-20 hours, such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 hours, or a range defined by any two thereof.
[0192] In step (d’ ) , the temperature at which the raw material A’ is reacted with the capping agent is not particularly limited and may be suitably selected as desired. For example, the reaction temperature may be 30-90 ℃, for example, 30, 40, 50, 60, 70, 80, 90 ℃, or a range defined by any two thereof.
[0193] In step (d’ ) , the reaction of the raw material A’ with the capping agent may be carried out in a solvent. The solvent is not particularly limited and may be suitably selected as desired. For example, the reaction solvent may be N, N-Dimethylformamide (DMF) .
[0194] In step (d’ ) , the reaction of the raw material A’ with the capping agent may be carried out in the presence of an activator. The activator is not particularly limited and may be suitably selected as desired. For example, the activator may be triethylamine.
[0195] In step (d’ ) , the molar equivalent of the capping agent relative to the raw material A’ may be from 0.08 eq. to 1.50 eq., preferably 1.00 eq., for example: 0.08, 0.09, 0.10, 0.20, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90, 1.00, 1.10, 1.20, 1.30, 1.40, 1.50 eq.
[0196] The method may further comprise further adding and mixing other components comprised in the composition.
[0197] There is no particular limitation on the order in which the components are mixed. For example, the components may be mixed together or sequentially; all the components may be added and dissolved in the total amount of the solvent individually in a certain order, all at once or in batches; or some components may be added and dissolved in a portion of the solvent or a solvent individually in a certain order, all at once or in batches, the remaining components may be added and dissolved in another portion of the solvent individually in a certain order, all at once or in batches, and then the the resulting solutions are combined.
[0198] The individual components comprised in the composition are as described above in the section with respect to the composition and will not be repeated here.
[0199] The inventors have found that by the preparation method described above, compositions comprising the first polymer and the second polymer are obtained, wherein the two polymers produce a synergistic effect in terms of anti-oxidation effect.
[0200] Examples
[0201] In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with examples. It should be understood that specific examples described here are only for illustrating the present invention and are not for limiting the present invention.
[0202] 1. Sources of the Raw Materials
[0203] The sources of the raw materials involved in the embodiments are shown in Table 1 below.
[0204] Table 1. Sources of each raw material
[0205] 2. Test Methods
[0206] Cell Anti-oxidation Capacity Test
[0207] Samples were tested for cell anti-oxidation capacity on human keratinocytes. Human keratinocytes (from Lifeline Cell Technology) were seeded in 12-well plates at a density of 1.4×105 cells / well. 1 mL of the sample was used to conduct pretreatment at 37℃ for 24 hours or no pretreatment was conducted. The cells were treated with 250 μM of H2O2 and incubated for 30 min. The cells were then incubated with a ROS (Reactive Oxygen Species) probe in the dark for 30 min, harvested and measured by High Content Imaging Analysis System (Perkin Elmer) . The measured results were analyzed by Image J as mean fluorescence intensity (MFI) .
[0208] DPPH Inhibition Rate Test
[0209] The samples were tested for DPPH Inhibition rate to evaluate their ability to eliminate oxidative free radicals. First, DPPH was dissolved with ethanol to prepare a DPPH solution with a concentration of 0.162 mg / mL. Then, the samples and the DPPH solution were mixed homogeneously at a 1: 1 volume ratio and reacted at room temperature in the dark for 30 minutes. The absorbance of the samples at 517 nm was measured using a microplate reader (Infinite E Plex, TECAN) . The DPPH inhibition rate was calculated according to the formula as follows:
[0210] wherein AControl is the DPPH inhibition rate of blank control group tested using pure water, and ASample is the DPPH inhibition rate of the experimental group tested using actual samples.
[0211] 3. Synthesis of the Diselenide Group Functionalized Hyaluronic Acid (Se-HA)
[0212] Preparation of Example 1
[0213] 20 mg of 2, 2’ - (1, 2-Diselanediyl) diethanamine dihydrochloride was weighed and dissolved into 5 mL of DMF. Succinic anhydride (1.0 eq. ) , and triethylamine (2.0 eq.) were added and dissolved completely. The mixture was stirred and reacted at 60 ℃ for 6 hours. Then HA1 (0.16 eq. ) , NHS (2.0 eq. ) , and EDC (1.0 eq. ) were added and dissolved completely. The resulting mixture was stirred and reacted overnight at 60 ℃. After concentrating under reduced pressure, the mixture was poured into acetone for precipitation, centrifugation and separation. The resulting solid was vacuum-dried to obtain the Se-HA Product 1.
[0214] Preparation of Example 2
[0215] 20 mg of 2, 2’ - (1, 2-Diselanediyl) diethanamine dihydrochloride was weighed and dissolved into 5 mL of DMF. Succinic anhydride (1.0 eq. ) , and triethylamine (2.0 eq.) were added and dissolved completely. The mixture was stirred and reacted at 60℃ for 6 hours. Then HA2 (0.16 eq. ) , NHS (2.0 eq. ) , and EDC (1.0 eq. ) were added and dissolved completely. The resulting mixture was stirred and reacted overnight at 60 ℃. After concentrating under reduced pressure, the mixture was poured into acetone for precipitation, centrifugation and separation. The resulting solid was vacuum-dried to obtain the Se-HA Product 2.
[0216] 4. Characterization of the Se-HA Products
[0217] Fourier Transform Infrared Absorption (FT-IR) Spectroscopy Test
[0218] FTIR measurements of the Se-HA Product 1 in the preparation Example 1 were conducted on a Shimadzu IRTracer-100 IR spectrometer (Shimadzu Corporation. ) . The above Se-HA products were compressed into disks with KBr at a pressure of 30 MPa for 6s and then measured over the wavenumber range from 4000 cm-1 to 400 cm-1. The resulting FT-IR spectra are shown in Fig. 1.
[0219] As shown in Fig. 1, the peak corresponding to CH2 infrared feature absorption at 2853 cm-1, the peak corresponding to C=O infrared feature absorption at 1734 cm-1, the peaks corresponding to C-O infrared feature absorption at 1350 and 1250 cm-1, the peak corresponding to Se-C infrared feature absorption at 745 cm-1, and peak corresponding to Se-Se infrared feature absorption at 542 cm-1 could be seen in this FT-IR spectrum, which confirmed that Se was successfully incorporated into the above products.
[0220] Gel Permeation Chromatography (GPC) Test
[0221] The molecular weights of the Se-HA Product 1 from the preparation Example 1 and of the Se-HA Product 2 from the preparation Example 2 were measured via a gel permeation chromatograph (CBM-20Alite, Shimadzu Corporation. ) , respectively. The number average molecular weight of the Se-HA Product 1 was measured to be 36, 799, and the number average molecular weight of the Se-HA Product 2 was 4, 231.
[0222] X-ray Photoelectron Spectroscopy (XPS) Test
[0223] Elemental analyses of the Se-HA Product 1 in the preparation Example 1 and the Se-HA Product 2 in the preparation Example 2 were carried out using an XPS instrument (ESCALAB 250xi) . The specific testing conditions were as follows: vacuum degree was 1 x 10-8; non-monochromatic Al K α (photon energy of 1,486.6 eV) anode target; the scanning range of the binding energy was 0~1000 eV;with a passing energy (P. E. ) of 40 eV; and a scanning step size of 0.1 eV. The resulting XPS full spectrum and narrow spectrum of Se3d are shown in Figs. 2-5, respectively. The elemental contents measured for the Se-HA Product 1 and for the Se-HA Product 2 are summarized in Table 2 below.
[0224] Table 2
[0225] As can be seen from Figs 2 and 3 and the results in Table 2, the atomic content of element Se in Se-HA Product 1 is 0.22 at%. As can be seen from Figs. 4 and 5 and the results in Table 2, the atomic content of element Se in Se-HA Product 2 is 0.41 at%. This confirms that Se was successfully incorporated into the above products.
[0226] 5. Formulation of Compositions
[0227] Individual components were mixed according to the compositions shown in Table 3 below, and mechanically stirred at 300 rpm for one hour at room temperature or homogeneously stirred at 1500 rpm for 10 minutes at room temperature to prepare Composition A and Composition B.
[0228] Table 3
[0229] 6. Cell Anti-oxidation Capacity Experiment
[0230] Composition A and Composition B, formulated as described above, were tested according to the procedures of cell anti-oxidation capacity test as described in Part 2, respectively. The results of the normalized fluorescence readings obtained are summarized in Table 4 below.
[0231] Table 4
[0232] *Control group is the blank group, i.e., cells that are cultured normally without either sample treatment or hydrogen peroxide treatment.
[0233] **Positive control group refers to cells that were not treated with samples, but were treated with hydrogen peroxide.
[0234] As shown in Table 4 above, both Composition A and Composition B were effective in reducing the content of ROS in the cells, and had a good anti-oxidation capacity. Moreover, as compared with the Composition A comprising Se-HA Product 2 with a number average molecular weight of 4, 231, the Composition B comprising Se-HA Product 1 with a number average molecular weight of 36, 799 resulted in a further reduction in the content of ROS in the cells, i.e., having a significantly improved anti-oxidation capacity. As can be seen from the XPS results in Table 2, the content of Se in Se-HA Product 2 was much higher than that in Se-HA Product 1. In other words, as compared with the use of Se-HA Product 2 having a number average molecular weight of 4, 231, by using Se-HA Product 1 having a number average molecular weight of 36, 799, a higher anti-oxidation capacity can be achieved even with a lower grafting rate of selenocystamine, and such an effect was obviously unexpected.
[0235] 7. DPPH Inhibition Rate Test Experiment
[0236] A control group and compositions 1-20 were prepared using the above mentioned Se-HA products 1 and 2, and water, respectively, according to the compositions shown in Table 5 below, and the control group and compositions 1-20 were tested according to the procedures of DPPH inhibition rate test described in Part 2, respectively. The results obtained are summarized in Table 5 below.
[0237] Table 5
[0238] As can be seen from the results in Table 5 above, when the composition comprises both the Se-HA Product 1 and Se-HA Product 2 and the content of the Se-HA Product 1 is in the range of 0.01 wt%to 0.06 wt%and the content of the Se-HA Product 2 is in the range of 0.04 wt%to 0.06 wt%, such compositions exhibit a significant synergistic effect in terms of DPPH inhibition rate, which is superior to the sum of the effect of the Se-HA Product 1 alone and the effect of the Se-HA Product 2 alone.
[0239] The above-described are only exemplary embodiments of the present invention. It should be noted here that, for those skilled in the art, modifications may be made to the present invention without departing from the inventive concept of the invention, but these fall within the protection scope of the present invention.
Claims
A polymer having the structure of the following formula I:wherein:each occurrence of R1, R2, R3, R4, and R5 is independently selected from H, a group represented by -L3-OH, and a group represented by-NR7-C (O) -R8,wherein:each occurrence of L3 is independently selected from a single bond and C1-C10 alkylene group, preferably from a single bond and C1-C6 alkylene group, more preferably from a single bond, methylene group, ethylene group, propylene group, and butylene group;each occurrence of R7 and R8 is independently selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, propyl group, and butyl group;each occurrence of Z is independently selected from the group consisting of:- a group represented by -OM2, wherein M2 is selected from H and a metal ion, the metal ion is preferably selected from the group consisting of sodium, potassium, ammonium, zinc, and calcium ions; or- a group represented by -X1-L1-M1-L2-R6, wherein:each occurrence of L1 and L2 is independently selected from C1-C10 alkylene group, preferably from C1-C6 alkylene group, more preferably from methylene group, ethylene group, propylene group, and butylene group;each occurrence of X1 is selected from -NR9-, -S-, and -O-, wherein R9 is selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, propyl group, and butyl group;each occurrence of R6 is selected from -N (R10) (R11) , -SR10, and -OR10, wherein R10 and R11 are each independently selected from:- H;- C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, optionally comprising one or more heteroatoms such as halogen, O or S atoms; and- a group represented by -C (O) -G, wherein each occurrence of G is selected from arylgroup consisting of: C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, optionally comprising one or more heteroatoms such as halogen, O or S atoms; C6-C30 aromatic hydrocarbon group, preferably phenyl group unsubstituted or substituted by one or more C1-C10 alkyl groups, preferably C1-C4 alkyl groups; and a group represented by -L4-C (O) -OR16, wherein L4 is selected from a single bond and C1-C10 alkylene group, preferably from a single bond and C1-C6 alkylene group, more preferably from a single bond, methylene group, ethylene group, propylene group, and butylene group, R16 is selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, propyl group, and butyl group;M1 is a group represented by - (Se) o- [L5- (Se) p] q-, wherein o is 1-10, preferably 2-5, p is 1-10, preferably 2-5, q is 0-10, preferably 0-5, each occurrence of L5 is independently selected from C1-C10 alkylene group, preferably from C1-C6 alkylene group, more preferably from methylene group, ethylene group, propylene group, and butylene group, and M1 comprises at least one Se-Se bond, preferably M1 is -Se-Se-;n has a value such that the polymer has a number average molecular weight Mn from 20,000 to 50,000, preferably from 30,000 to 44,000, more preferably from 32,000 to 42,000, more preferably from 35,000 to 38,000; andthe atomic content of element Se in the polymer is from 0.10 at%to 10.00 at%, preferably from 0.15 at%to 0.50 at%, more preferably from 0.20 at%to 0.30 at%, based on the total amount of atoms other than hydrogen in the polymer.The polymer of claim 1, wherein the formula I satisfies one or more of the following conditions (i) to (iv) , preferably satisfies all of the following conditions(i) to (iv) :(i) R1 and R2 are -OH;(ii) R3 is -OH;(iii) R4 is a group represented by -L3-OH, wherein L3 is C1-C10 alkylene group, preferably C1-C6 alkylene group, more preferably selected from methylene group, ethylene group, propylene group, and butylene group, for example, methylene group; and(iv) R5 is a group represented by -NR7-C (O) -R8, wherein R7 is H, and R8 is C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably selected from methyl group, ethyl group, propyl group, and butyl group, for example, methyl group.The polymer of claim 1 or 2, wherein the formula I satisfies one or more of the following conditions (v) to (viii) , preferably satisfies all of the following conditions (v) to (viii) :(v) L1 and L2 are each independently C1-C10 alkylene group, preferably C1-C6 alkylene group, more preferably selected from methylene group, ethylene group, propylene group, and butylene group, for example, ethylene group;(vi) X1 is -NR9-, wherein R9 is selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, propyl group, and butyl group, for example, H;(vii) R6 is -N (R10) (R11) , wherein R10 and R11 are each independently selected from the group consisting of:- H;- C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, optionally substituted by one or more halogen atoms such as F; and- a group represented by -C (O) -G, wherein G is: C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, optionally substituted by one or more heteroatoms such as halogen atom (s) ; phenyl group unsubstituted or substituted by one or more C1-C4 alkyl groups; or a group represented by -L4-C (O) -OH, wherein L4 is C1-C10 alkylene group, preferably selected from a single bond and C1-C6 alkylene group, more preferably from a single bond, methylene group, ethylene group, propylene group, and butylene group, for example, ethylene group; and(viii) M1 is -Se-Se-.A composition comprising the polymer of any one of claims 1-3.The composition of claim 4, wherein the content of the polymer is 0.01-10.0 wt%, for example, 0.01-5.0 wt%, preferably from 0.01 wt%to 1.00 wt%, more preferably from 0.01 wt%to 0.10 wt%, based on the total weight of the composition.The composition of claim 4 or 5, wherein the composition comprises the polymer, referred to as a first polymer, and the composition further comprises a second polymer, the second polymer having the structure represented by the following formula I’ ,wherein:each occurrence of R1, R2, R3, R4, and R5 is independently selected from H, a group represented by -L3-OH, and a group represented by -NR7-C (O) -R8, wherein each occurrence of L3 is independently selected from a single bond and C1-C10 alkylene group, preferably from a single bond and C1-C6 alkylene group, more preferably from a single bond, methylene group, ethylene group, propylene group, and butylene group;each occurrence of R7 and R8 is independently selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, propyl group, and butyl group;each occurrence of Z is independently selected from the group consisting of:- a group represented by -OM2, wherein M2 is selected from H and a metal ion, the metal ion is preferably selected from the group consisting of sodium, potassium, ammonium, zinc, and calcium ions; or- a group represented by -X1-L1-M1-L2-R6, wherein:each occurrence of L1 and L2 is independently selected from C1-C10 alkylene group, preferably from C1-C6 alkylene group, more preferably from methylene group, ethylene group, propylene group, and butylene group;each occurrence of X1 is selected from -NR9-, -S-, and -O-, wherein R9 is selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, propyl group, and butyl group;each occurrence of R6 is selected from -N (R10) (R11) , -SR10, and -OR10, wherein R10 and R11 are each independently selected from the group consisting of:- H;- C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, optionally comprising one or more heteroatoms such as halogen, O or S atoms; and- a group represented by -C (O) -G, wherein each occurrence of G is selected from the group consisting of: C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, optionally comprising one or more heteroatoms such as halogen, O or S atoms; C6-C30 aromatic hydrocarbon group, preferably phenyl group unsubstituted or substituted by one or more C1-C10 alkyl groups, preferably C1-C4 alkyl groups; and a group represented by -L4-C (O) -OR16, wherein L4 is selected from a single bond and C1-C10 alkylene group, preferably from a single bond and C1-C6 alkylene group, more preferably from a single bond, methylene group, ethylene group, propylene group, and butylene group, R16 is selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, propyl group, and butyl group;M1 is a group represented by - (Se) o- [L5- (Se) p] q-, wherein o is 1-10, preferably 2-5, p is 1-10, preferably 2-5, q is 0-10, preferably 0-5, each occurrence of L5 is independently selected from C1-C10 alkylene group, preferably from C1-C6 alkylene group, more preferably from methylene group, ethylene group, propylene group, and butylene group, and M1 comprises at least one Se-Se bond, preferably M1 is -Se-Se-;n has a value such that the second polymer has a number average molecular weight Mn from 1,000 to 10,000, preferably from 2,000 to 8,000, more preferably from 3,000 to 5, 500, more preferably from 3, 500 to 5,000;the atomic content of element Se in the second polymer is from 0.10 at%to 10.00 at%, preferably from 0.30 at%to 0.60 at%, more preferably from 0.35 at%to 0.45 at%, based on the total amount of atoms other than hydrogen in the second polymer; andthe content of the first polymer is from 0.03 wt%to 0.07 wt%, preferably from 0.04 wt%to 0.06 wt%, and the content of the second polymer is 0.005 wt%-0.07 wt%, preferably from 0.01 wt%to 0.06 wt%, based on the total weight of the composition.The composition of claim 6, wherein the content of the first polymer is 0.04 wt%, and the content of the second polymer is 0.005 wt%-0.07 wt%, preferably from 0.01 wt%to 0.06 wt%, based on the total weight of the composition; or wherein the content of the first polymer is 0.06 wt%, and the content of the second polymer is 0.05 wt%-0.07 wt%, preferably 0.06 wt%, based on the total weight of the composition.The composition of claim 6, wherein the formula I’ s atisfies one or more of the following conditions (i) to (iv) , preferably satisfies all of the following conditions(i) to (iv) :(i) R1 and R2 are -OH;(ii) R3 is -OH;(iii) R4 is a group represented by -L3-OH, wherein L3 is C1-C10 alkylene group, preferably C1-C6 alkylene group, more preferably selected from methylene group, ethylene group, propylene group, and butylene group, for example, methylene group; and(iv) R5 is a group represented by -NR7-C (O) -R8, wherein R7 is H, and R8 is C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably selected from methyl group, ethyl group, propyl group, and butyl group, for example, methyl group.The composition of claim 6, wherein the formula I’ s atisfies one or more of the following conditions (v) to (viii) , preferably satisfies all of the following conditions (v) to (viii) :(v) L1 and L2 are each independently C1-C10 alkylene group, preferably C1-C6 alkylene group, more preferably selected from methylene group, ethylene group, propylene group, and butylene group, for example, ethylene group;(vi) X1 is -NR9-, wherein R9 is selected from H and C1-C10 alkyl group, preferably from H and C1-C6 alkyl group, more preferably from H, methyl group, ethyl group, propyl group, and butyl group, for example, H;(vii) R6 is -N (R10) (R11) , wherein R10 and R11 are each independently selected from the group consisting of:- H;- C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, optionally substituted by one or more halogen atoms such as F; and- a group represented by -C (O) -G, wherein G is: C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, optionally substituted by one or more heteroatoms such as halogen atom (s) ; phenyl group unsubstituted or substituted by one or more C1-C4 alkyl groups; or a group represented by -L4-C (O) -OH, wherein L4 is C1-C10 alkylene group, preferably selected from single bond, and C1-C6 alkylene group, more preferably from a single bond, methylene group, ethylene group, propylene group, and butylene group, for example, ethylene group; and(viii) M1 is -Se-Se-.The composition of claim 4 or 5, wherein the composition is a personal care product composition.The composition of claim 4 or 5, wherein the composition further comprises a solvent, for example, water, monohydric alcohol such as ethanol, polyhydric alcohol such as ethanediol, propanediol, or butanediol, preferably the content of the solvent is from 50.0 wt%to 99.9 wt%, for example, from 80.0 wt%to 99.9 wt%.The composition of claim 4 or 5, wherein the composition further comprises one or more ingredients selected from the group consisting of: humectants, for example, glycerol, hyaluronic acid, glucose polyether, glycerol polyether; surfactants, for example, cationic surfactants, anionic surfactants, nonionic surfactants, silicone surfactants, amphoteric surfactants, polymeric surfactants; rheology modifiers, for example, polyamides, acrylic polymers, xanthan gum, sclerotium gum, silicone polymers; oils and esters, for example, mineral oils, petrolatum, synthetic esters, vegetable oils, ferment oils; waxes, for example, ozocerite wax, beeswax, synthetic waxes, natural waxes; salts, for example, salts of ethylene diamine tetra-acetic acid, sodium chloride, magnesium sulphate; pH modifiers, for example, sodium hydroxide, potassium hydroxide, citric acid, hydrochloric acid; organic acids, for example, salicylic acid, glycolic acid, ferulic acid, mandelic acid, azelaic acid; preservatives, for example, phenoxyethanol, chlorphenesin; antioxidants, for example, BHT, vitamin E, tocopheryl acetate; inorganic compound powders, for example, iron oxides, titanium dioxide, zinc dioxide, cerium dioxide, silicon dioxide, bismuth oxychloride, calcium carbonate, hydroxyapatite; and colorants.Use of the polymer of any one of claims 1-3 or the composition of any one of claims 4-12 for personal care products.A method for preparing the polymer of any one of claims 1-3, comprising the following steps:(a) providing a capped raw material A, the capped raw material A has the following formula II:wherein L1, L2, and M1 are as defined in claim 1 or 3,X2 is selected from -NH2, -NHR13, -SH, and -OH, wherein R13 is selected from C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably selected from methyl group, ethyl group, propyl group, and butyl group, andR12 is selected from -N (R14) (R15) , -NHR14, -SR14, and -OR14, wherein R14 and R15 are each independently selected from the group consisting of: C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, optionally comprising one or more heteroatoms such as halogen, O or S atoms; and a group represented by -C (O) -G, wherein G is as defined in claim 1 or 3; and(b) reacting the capped raw material A with a polymer B to obtain said polymer, wherein the polymer B has the following formula III:wherein R1, R2, R3, R4, and R5 are as defined in claim 1 or 2, n is as defined in claim 1, and M2 is selected from H and a metal ion, the metal ion is preferably selected from the group consisting of sodium, potassium, ammonium, zinc, and calcium ions.The method of claim 14, wherein the capped raw material A is obtained by the following steps:(c) providing a raw material A having the following formula IV:wherein L1, L2, and M1 are as defined in claim 1 or 3,X2, and X2’ are each independently selected from -NH2, -NHR13, -SH, and -OH, wherein R13 is selected from C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably from methyl group, ethyl group, propyl group, and butyl group; and(d) reacting the raw material A with a capping agent such that one of X2 and X2’ is capped to obtain the capped raw material A, preferably the molar equivalent of the capping agent relative to the raw material A is from 0.08 eq. to 1.50 eq., preferably 1.00 eq.The method of claim 15, wherein the raw material A is selenocystamine.The method of claim 15, wherein the capping agent is selected from the group consisting of succinic anhydride, acetic anhydride, formaldehyde, ethyl trifluoroacetate, and acyl chlorides such as benzoyl chloride or methyl phthalate formyl chloride.The method of any one of claims 14-17, wherein the polymer B is hyaluronic acid or a metal salt thereof, for example, sodium, potassium, ammonium, zinc and / or calcium salts of hyaluronic acid.The method of any one of claims 14-17, wherein in step (b) , the capped raw material A is in excess relative to the polymer B, preferably the molar equivalent of the polymer B relative to the capped raw material A is from 0.01 eq. to 0.50 eq., for example, from 0.10 eq. to 0.20 eq..A method for preparing the composition of claim 6, comprising mixing the first polymer with the second polymer, whereinthe first polymer is prepared by the method as defined in any one of claims 14-19, andthe second polymer is prepared by steps comprising:(a’ ) providing a capped raw material A’ , the capped raw material A’ has the following formula II’ :wherein L1, L2, and M1 are as defined in claim 6 with respect to formula I’ ,X2 is selected from -NH2, -NHR13, -SH, and -OH, wherein R13 is selected from C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably selected from methyl group, ethyl group, propyl group, and butyl group, andR12 is selected from -N (R14) (R15) , -NHR14, -SR14, and -OR14, wherein R14 and R15 are each independently selected from: C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably methyl group, ethyl group, propyl group, or butyl group, optionally comprising one or more heteroatoms such as halogen, O or S atoms; and a group represented by -C (O) -G, wherein G is as defined in claim 6 with respect to formula I’ ; and(b’ ) reacting the capped raw material A’ with a polymer B’ to obtain the second polymer, wherein the polymer B’ has the following formula III’ :wherein R1, R2, R3, R4, R5 are as defined in claim 6 with respect to formula I’ , M2 is selected from H and a metal ion, the metal ion is preferably selected from the group consisting of sodium, potassium, ammonium, zinc, and calciumions; and n is as defined in claim6 with respect to formula I’ .The method of claim 20, wherein the capped raw material A’ is obtained by the following steps:(c’ ) providing a raw material A’ having the following formula IV’ :wherein L1, L2, and M1 are as defined in claim 6 with respect to formula I’ ,X2 and X2’ are each independently selected from -NH2, -NHR13, -SH, and -OH, wherein R13 is selected from C1-C10 alkyl group, preferably C1-C6 alkyl group, more preferably selected from methyl group, ethyl group, propyl group, and butyl group; and(d’ ) reacting the raw material A’ with a capping agent such that one of X2 and X2’ is capped to obtain the capped raw material A’ , preferably the molar equivalent of the capping agent relative to the raw material A’ is from0.08 eq. to 1.50 eq., preferably 1.00 eq..The method of claim 21, wherein the raw material A’ is selenocystamine.The method of claim 21, wherein the capping agent is selected from the group consisting of succinic anhydride, acetic anhydride, formaldehyde, ethyl trifluoroacetate, and acyl chlorides such as benzoyl chloride or methyl phthalate formyl chloride.The method of any one of claims 20-23, wherein the polymer B’ is hyaluronic acid or a metal salt thereof, for example, sodium, potassium, ammonium, zinc and / or calcium salts of hyaluronic acid.The method of any one of claims 20-23, wherein in step (b’ ) , the capped raw material A’ is in excess relative to the polymer B’ , preferably the molar equivalent of the polymer B’ relative to the capped raw material A’ is from 0.01 eq.to 0.50 eq., for example, from 0.10 eq.to 0.20 eq.
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