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CN-121985935-A - Use of sulfur-containing polymers for improving sun protection

CN121985935ACN 121985935 ACN121985935 ACN 121985935ACN-121985935-A

Abstract

The present invention relates to the use of a polymer comprising one or more synthetic polymer units comprising repeating units of the structure of formula (1) for increasing the UV and/or blue light absorption of one or more UV and/or blue light filters. Furthermore, the present invention relates to a sunscreen composition comprising such a polymer, one or more UV and/or blue light filters and one or more cosmetically acceptable carriers.

Inventors

  • S. Delvos
  • T. Lukwitz
  • A. Zimirik

Assignees

  • 科莱恩国际有限公司

Dates

Publication Date
20260505
Application Date
20240926
Priority Date
20230927

Claims (15)

  1. 1. Use of a polymer for increasing UV and/or blue light absorption of one or more UV and/or blue light filters, the polymer comprising: (i) One or more synthetic polymer units comprising: (a) A repeat unit of the structure of formula (1): Wherein the method comprises the steps of R 1 and R 2 are independently selected from H, methyl or ethyl; a is a linear or branched C 1 -C 12 alkyl radical, and Q + is a cosmetically acceptable cation, and (B) Optionally one or more crosslinking or branching units, and (C) Optionally one or more other repeating units which are different from the repeating units of formula (1) and from the crosslinking or branching units, and (Ii) One or more water-soluble and/or water-swellable polysaccharide polymer units.
  2. 2. The use of claim 1, wherein Q + is H + 、NH 4 + , an organoammonium ion [ NHR 5 R 6 R 7 ] + , wherein R 5 、R 6 and R 7 are independently of each other hydrogen, a linear or branched alkyl group having 1 to 22 carbon atoms, a linear or branched, mono-or polyunsaturated alkenyl group having 2 to 22 carbon atoms, a C 6 -C 22 alkylamidopropyl group, a linear monohydroxyalkyl group having 2 to 10 carbon atoms, or a linear or branched dihydroxyalkyl group having 3 to 15 carbon atoms, and wherein at least one of the groups R 5 、R 6 and R 7 is not hydrogen, or Q + is Li + ,Na + ,K + ,½Ca ++ ,½Mg ++ ,½Zn ++ ,1/3Al +++ , or a combination thereof.
  3. 3. The use according to claim 1 or 2, wherein the recurring unit of formula (1) is formed by the introduction of a monomer selected from the group consisting of acryl dimethyl taurate, acryl-1, 1-dimethyl-2-methyl taurate, acryl-N-methyl taurate, salts thereof, and combinations thereof, In particular wherein the repeating unit of formula (1) is formed by the introduction of acryl dimethyl taurines or a salt thereof.
  4. 4. The use according to any one of claims 1 to 3, wherein the water-soluble and/or water-swellable polysaccharide polymer unit is selected from the group consisting of chitosan, xanthan gum, fenugreek gum, tara gum, carob gum, carrageenan, guar gum, alginate, agar, tragacanth gum, tamarind seed gum, acacia gum, cherry gum, karaya gum, okra gum, cassia gum, chicory gum, konjac glucomannan, broadleaf elm green wood gum, pectin, sclerotium gum, gellan gum, tamarind seed gum, sclerotium gum, dextran, dextrin, starch, derivatives thereof, and combinations thereof, Preferably, wherein the water-soluble and/or water-swellable polysaccharide polymer units are uncharged polysaccharide polymer units, Preferably, wherein the polysaccharide polymer units are selected from the group consisting of tara gum, guar gum, carob gum, cassia gum, fenugreek gum, glucomannan, tamarind seed gum, sclerotium gum, dextran, dextrin, xanthan gum, starch, and combinations thereof, preferably from the group consisting of tara gum, guar gum, glucomannan, and combinations thereof, in particular from the group consisting of tara gum, guar gum, and combinations thereof.
  5. 5. The use of any one of claims 1 to 4, wherein the hybrid polymer structure is such that the polysaccharide polymer units are a backbone and one or more synthetic polymer units are grafted onto the backbone.
  6. 6. The use of any one of claims 1 to 5, wherein the polymer comprises cross-linking or branching units formed from the introduction of monomers of any one of the following structures or salts thereof, or combinations thereof: (I) Formula (2): Wherein the method comprises the steps of R 1 is independently selected from H, methyl or ethyl, and R 2 is a linear or branched alkylene radical having 1 to 6 carbon atoms, or a linear or branched, mono-or polyunsaturated alkenylene radical having 2 to 6 carbon atoms, or (II) formula (3): Wherein the method comprises the steps of R 1 is independently selected from H, methyl or ethyl, and R 2 is H, or is a linear or branched alkyl group having 1 to 6 carbon atoms, or is a linear or branched, mono-or polyunsaturated alkenyl group having 2 to 6 carbon atoms; D. E and F are independently methyleneoxy (-CH 2 O-), ethyleneoxy (-CH 2 -CH 2 -O-), propyleneoxy (-CH (CH 3 )-CH 2 -O-), straight-chain or branched alkylene having 1 to 6 carbon atoms, straight-chain or branched mono-or polyunsaturated alkylene having 2 to 6 carbon atoms, straight-chain monohydroxyalkylene having 2 to 6 carbon atoms, or straight-chain or branched dihydroxyalkylene having 3 to 6 carbon atoms, and O, p and q are each independently integers of 1 to 50, Preferably, wherein the crosslinking or branching units are formed from the introduction of a crosslinking agent selected from the group consisting of methylenebisacrylamide, esters of unsaturated mono-and polycarboxylic acids with polyols, preferably diacrylates, triacrylates, dimethacrylates and trimethacrylates (e.g., glycerol propoxylate triacrylate [ GPTA ]), more preferably diacrylates and dimethacrylates of butanediol and ethylene glycol, trimethylolpropane triacrylate (TMPTA) and trimethylolpropane trimethacrylate (TMPTMA), allyl compounds, preferably allyl (meth) acrylate, triallyl cyanurate, diallyl maleate, polyallyl esters, tetraallyloxyethane, triallylamine, tetraallylethylenediamine, allyl phosphate, vinylphosphonic acid derivatives, salts thereof, and combinations thereof.
  7. 7. The use of any one of claims 1-6, wherein the polymer has a biodegradability of at least 30%, preferably at least 60%, more preferably at least 70%, particularly preferably at least 80%, as determined according to OECD method 301B.
  8. 8. The use of any one of claims 1-7, wherein the polymer comprises: (i) 1 to 95wt%, preferably 5 to 70wt%, more preferably 5 to 60wt%, even more preferably 10 to 50wt%, even more preferably 15 to 40wt%, even more preferably 20 to 40wt%, especially 25 to 40wt% of synthetic polymer units relative to the total mass of the polymer, the synthetic polymer units comprising: (a) 40 to 99.9wt%, preferably 80 to 99.9wt%, especially 96 to 99.9wt% of one or more repeating units of the structure of formula (1), relative to the total mass of the synthetic polymer units; (b) From 0.01 to 10% by weight, preferably from 0.01 to 5% by weight, in particular from 0.01 to 3% by weight, relative to the total mass of the synthetic polymer units, of one or more crosslinking or branching units, and (C) From 0 to 60% by weight, preferably from 0 to 20% by weight, in particular from 0 to 1% by weight, of one or more neutral repeating structural units, relative to the total mass of the synthetic polymer units, and (Ii) From 5 to 99wt%, preferably from 30 to 95wt%, more preferably from 40 to 95wt%, even more preferably from 50 to 90wt%, even more preferably from 60 to 85wt%, even more preferably from 60 to 80wt%, especially from 60 to 75wt% of water-soluble and/or water-swellable polysaccharide polymer units, relative to the total mass of the polymer.
  9. 9. The use of any one of claims 1-8, wherein the crosslinking or branching units are formed by the introduction of monomers comprising at least two ethylenically unsaturated double bonds.
  10. 10. Use according to any one of claims 1 to 9, wherein the polymer is obtained by free radical precipitation polymerization, preferably in a polar solvent, in particular wherein the free radical precipitation polymerization is carried out in a polar solvent mixture comprising water and a further compound.
  11. 11. The use according to any one of claims 1 to 10, wherein at least one of the one or more UV and/or blue light filters is selected from the group consisting of anthranilates, cinnamic acid derivatives, dibenzoylmethane derivatives, salicylic acid derivatives, camphor derivatives, triazine derivatives, benzophenone derivatives, , -Diphenylacrylate derivatives, benzotriazole derivatives, benzylidene malonate derivatives, benzimidazole derivatives, imidazolines, bisbenzoxazole derivatives, p-aminobenzoic acid (PABA) derivatives, benzothiazine derivatives, shielding polymers and shielding siloxanes, dimers based on alpha-alkylstyrenes, 4-diarylbutadienes, methoxypropylamino-cyclohexylidene-ethoxycyanoacetate, methoxypropylamino-cyclohexenylidene-ethoxyethylcyanoacetate, ethyl 9-oxo-9H-thioxanthene-2-carboxylate, sun-screening peptides, titanium dioxide, zinc oxide, iron oxide and mixtures thereof.
  12. 12. The use of any one of claims 1-11, wherein the one or more UV and/or blue light filters are selected from the group consisting of: 4-aminobenzoic acid (PABA, p-aminobenzoic acid), Polyoxyethylene 4-aminobenzoate (PEG-25 PABA, ethoxylated ethyl 4-aminobenzoate), 2-Ethylhexyl 4- (dimethylamino) benzoate (ethylhexyl-dimethyl-PABA, padimate O, 2-ethylhexyl 4-dimethylaminobenzoate), Methyl N, N, N-trimethyl-4- [ (4, 7-trimethyl-3-oxobicyclo [2.2.1] hept-2-ylidene) methyl ] anilinium sulfate (camphorbenzammonium methyl sulfate, 4- [ (2-oxo-3-bornylidene) methyl ] phenyltrimethylammonium methyl sulfate), (1, 4-Phenylenedio{ (E) methylene [ (3E) -7, 7-dimethyl-2-oxobicyclo [2.2.1] hept-1-yl-3-ylidene ] }) dimethyl sulfonic acid and salts thereof (terephthal-methylenedicamphsylic acid, izosu, 3' - (1, 4-phenylenediomethylene) bis [7, 7-dimethyl-2-oxo-bicyclo [2.2.1] heptane-1-methanesulfonic acid ]), 1, 7-Trimethyl-3- (phenylmethylene) bicyclo [2.2.1] heptan-2-one and salts thereof (3-benzylidene camphorsulfonic acid), Polymers of N- { (2 and 4) - [ (2-oxo-bornan-3-ylidene) methyl ] benzyl } acrylamide (polyacrylamidomethylbenzylidene camphor), 3-Benzylidene-1, 7-trimethylbicyclo [2.2.1] hept-2-one (3-benzylidene camphor, 1, 7-trimethyl-3- (phenylmethylene) bicyclo [2.2.1] hept-2-one 3 (4' -methylbenzylidene) -D, L-camphor), (3E) -1, 7-trimethyl-3- (4-methylbenzylidene) bicyclo [2.2.1] hept-2-one (4-methylbenzylidene camphor, enzacamene), 3, 5-Trimethylcyclohexyl salicylate (homosalate), 3-Octyl salicylate (ethylhexyl salicylate, octuloyl salicylate), 2-Ethylhexyl 4-methoxycinnamate (ethylhexyl methoxycinnamate, octinoxate), (2E) 3-methylbutyl 3- (4-methoxyphenyl) acrylate (isoamyl 4-methoxycinnamate, a Mi Shazhi, isoamyl 4-methoxycinnamate), (2E) 4- (1, 3, 5-heptamethyl-3-trisiloxane) -3-methylbutyl-3- (3, 4, 5-trimethoxyphenyl) acrylate (isoamyl trimethoxycinnamate trisiloxane), (2E) 2-ethoxyethyl 3- (4-methoxyphenyl) acrylate (cinnolate, 2-ethoxyethyl p-methoxycinnamate), The mixture is p-methoxy cinnamic acid isopropyl ester, diisopropyl cinnamic acid ethyl ester and 2, 4-diisopropyl cinnamic acid methyl ester, 1- (4-Methoxyphenyl) -3- [4- (2-methyl-2-propyl) phenyl ] -1, 3-propanedione (butylmethoxydibenzoylmethane, avobenzone, 1- (4-tert-butylphenyl) -3- (4-methoxyphenyl) propane-1, 3-dione), Bis (2, 4-dihydroxyphenyl) methanone (benzophenone-2, 2', 4' -tetrahydroxybenzophenone), (2-Hydroxy-4-methoxyphenyl) (phenyl) methanone (benzophenone-3, oxybenzone), 5-Benzoyl-4-hydroxy-2-methoxybenzenesulfonic acid (benzophenone-4, shu Liben one), 5-Benzoyl-4-hydroxy-2-methoxy-benzenesulfonic acid monosodium salt (benzophenone-5, shu Liben one sodium, hydroxy-4-methoxy-benzophenone-5 sulfonic acid and sodium salt thereof), Bis (2-hydroxy-4-methoxyphenyl) methanone (benzophenone-6,2,2 '-dihydroxy-4, 4' -dimethoxybenzophenone), (2-Hydroxy-4-methoxyphenyl) (2-hydroxyphenyl) methanone (benzophenone-8, dioxybenzone, 2' -dihydroxy-4-methoxybenzophenone), Disodium 3,3 '-carbonylbis (4-hydroxy-6-methoxybenzenesulfonate) (benzophenone-9,3,3' -carbonylbis [ 4-hydroxy-6-methoxybenzenesulfonate ] disodium), 4- (2-Beta-glucopyranosyloxy) propoxy-2-hydroxybenzophenone, 2- [4- (Diethylamino) -2-hydroxybenzoyl ] benzoic acid hexyl ester (diethylamino-hydroxybenzoyl-benzoic acid hexyl ester (DHHB); benzoic acid, 2- [4- (diethylamino) -2-hydroxybenzoyl ] -, hexyl ester), 2-Phenyl-1H-benzimidazole-5-sulfonic acid and its potassium, sodium and triethanolamine salts (phenylbenzimidazole sulfonic acid, ensulizole), 2,2'- (1, 4-Phenylene) disodium bis (6-sulfo-1H-benzimidazole-4-sulfonic acid) (disodium phenylbisbenzimidazole tetrasulfonate; bisdisulizole Disodium; 1H-benzimidazole-4, 6-disulfonic acid, 2' - (1, 4-phenylene) bis-, disodium salt), 2-Ethylhexyl 2-cyano-3, 3-diphenylacrylate (octocrylene, 2-ethylhexyl 2-cyano-3, 3-diphenylacrylate), 4,4' - [ (6- [4- ((1, 1-Dimethylethyl) -amino-carbonyl) phenylamino ] -1,3, 5-triazin-2, 4-yl) diimino ] bis (2-ethylhexyl benzoate) - (diethylhexyl-butyrylaminobazinone, isofrazinol), 2,2' - [6- (4-Methoxyphenyl) -1,3, 5-triazine-2, 4-diyl ] bis {5- [ (2-ethylhexyl) oxy ] phenol } (bisethylhexyloxy phenol methoxyphenyl triazine, bemotrizinol), 2,4, 6-Tris (4-biphenylyl) -1,3, 5-triazine (terphenyltriazine (nanometers)), 3,3 - (1, 4-Phenylene) bis (5, 6-diphenyl-1, 2, 4-triazine) (phenylene bisdiphenyltriazine), 4,4 ,4 Tris (2-ethylhexyl) tribenzoate (ethylhexyl triazone), 2- (2H-benzotriazol-2-yl) -4-methyl-6- (2-methyl-3- (1, 3-tetramethyl-1- (trimethylsiloxy) -disiloxy) -propyl) -phenol 2,4, 6-tris [ p- (2-ethylhexyloxycarbonyl) phenylamino ] -1,3, 5-triazine, - (1, 3, 5-triazine), 2- (2H-benzotriazol-2-yl) -6- [3- (1, 3, 5-heptamethyl-3-trisiloxane) -2-methylpropyl ] -4-methylphenol (cresol trisiloxane, silatrizole, phenol, 2- (2H-benzotriazol-2-yl) -4-methyl-6- (2-methyl-3- (1, 3-tetramethyl-1- (trimethylsilyl) oxy) -disiloxane) propyl), 2,2' -Methylene-bis (6- (2 h-benzotriazol-2-yl) -4- (1, 3-tetramethylbutyl) phenol) (methylenebis benzotriazolyl tetramethylbutylphenol, bisoctrizole, MBBT), Polysiloxanes and silicones, dimethyl, 3- (4- (2, 2-di (ethoxycarbonyl) vinyl) phenoxy) propen-2-ylmethyl, 3- (4- (2, 2-di (ethoxycarbonyl) vinyl) phenoxy) propen-1-ylmethyl, trimethylsilyl-terminated (polysiloxane-15, diethylbenzylidene malonate polydimethylsiloxane), The preparation method of the menthyl anthranilate, meladipate ester Methoxypropylamino-cyclohexenylidene-cyanoacetic acid ethoxyethyl ester, Titanium dioxide and titanium dioxide TiO 2 (nanometers), Zinc oxide and zinc oxide ZnO (nano), The iron oxide is used as a catalyst, And combinations of two or more thereof, Preferably wherein the one or more UV and/or blue light filters are selected from the group consisting of butyl methoxydibenzoylmethane, octocrylene, bisethylhexyl oxyphenol methoxyphenyltriazine, ethylhexyl triazone, ethylhexyl salicylate, diethylamino-hydroxybenzoyl-hexyl benzoate, ethylhexyl methoxycinnamate, diethylhexyl-butyrylamino-triazone, cresyl trisiloxane, phenylbenzimidazole sulfonic acid, methylenebisbenzotriazolyl tetramethylbutylphenol, terephthalene dicarbamate sulfonic acid, 4-methylbenzene camphor, polysiloxane-15, p-methoxypinnamate isoamyl, phenyl bisbenzimidazole tetrasulfonate, terphenyl triazine, phenylene bisdiphenyltriazine, homosalate, and combinations of two or more thereof.
  13. 13. The use of any one of claims 1-12, wherein the one or more UV and/or blue light filters are selected from the group consisting of: (A) An oil-soluble organic UV absorber preferably selected from the group consisting of bis-ethylhexyl oxyphenol methoxyphenyl triazine, butyl methoxydibenzoylmethane, ethylhexyl methoxycinnamate, octocrylene, oxybenzone, shu Liben ketone, diethyl hexyl butyryl amino triazinone, cresyl trazotrisiloxane, ethylhexyl salicylate, ethylhexyl triazinone, homosalate, octuloyl, isopentyl p-methoxycinnamate, 4-methylbenzylidene camphor, polysiloxane-15, diethylamino-hydroxybenzoyl-hexyl benzoate, methoxypropylamino-cyclohexanylidene-cyanoethoxyethyl acetate, 9-oxo-9H-thioxanthene-2-carboxylate, diethylamino-hydroxybenzoyl-hexyl benzoate, ethyltriazine, benzyl salicylate, avobenzone, and mixtures thereof; (B) A poorly soluble organic UV absorber, preferably selected from the group consisting of methylenebis benzotriazole tetramethylbutylphenol, terphenyltriazine, methanone, 1' - (1, 4-piperazinediyl) bis [1- [2- [4- (diethylamino) -2-hydroxybenzoyl ] phenyl ] -methanone, and mixtures thereof; (C) An inorganic UV absorber, preferably selected from the group consisting of titanium oxide, zinc oxide, iron oxide, and mixtures thereof; (D) The water-soluble UV absorber is preferably selected from the group consisting of phenylbenzimidazole sulfonic acid, shu Liben ketone sodium salt, benzylidene camphorsulfonic acid, camphorbenzammonium methyl sulfate, cinnolsha ester, disodium phenyldibenzimidazole tetrasulfonate, terephthalylidene camphorsulfonic acid, PABA, PEG-25 PABA, and mixtures thereof, and Salts thereof and mixtures thereof, In particular the one or more UV and/or blue light filters are selected from the group consisting of bis-ethylhexyl oxyphenol methoxyphenyl triazine, ethylhexyl methoxycinnamate, octocrylene, butylmethoxydibenzoylmethane, ethylhexyl salicylate, butylmethoxydibenzoylmethane, phenylbenzimidazole sulfonic acid, terephthalylenedicamphsylic acid, benzophenone-3, benzophenone-4, benzophenone-5, 4-ethylbenzylidene camphor, benzimidazole salts, bis-ethylhexyl oxyphenol methoxyphenyl triazine, ethylhexyl triazone, diethyl hexyl butyryl aminotriazone, cresyl trisiloxane, and salts and mixtures thereof.
  14. 14. Use according to any one of claims 1 to 13, wherein the use is carried out in a cosmetic composition for sunscreening, preferably a sunscreen product, in particular a sunscreen emulsion, a sunscreen cream, a sunscreen gel, a sunscreen spray or a sunscreen emulsion.
  15. 15. A cosmetic composition comprising: (A) From 0.1 to 20% by weight, preferably from 0.2 to 5% by weight, in particular from 0.5 to 2.5% by weight, relative to the total mass of the cosmetic composition, of one or more polymers comprising (or consisting of) the following units: (i) One or more synthetic polymer units comprising (or consisting of) the following repeating units: (a) A repeat unit of the structure of formula (1): Wherein the method comprises the steps of R 1 and R 2 are independently selected from H, methyl or ethyl; a is a linear or branched C 1 -C 12 alkyl radical, and Q + is a cosmetically acceptable cation, and (B) Optionally one or more crosslinking or branching units, and (C) Optionally one or more other repeating units which are different from the repeating units of formula (1) and from the crosslinking or branching units, and (Ii) One or more water-soluble and/or water-swellable polysaccharide polymer units; (B) 0.1 to 50wt%, preferably 1 to 40wt%, especially 5 to 20wt% or 15 to 40wt% of one or more UV and/or blue light filters, relative to the total mass of the cosmetic composition; (C) 10-80wt%, preferably 20-70wt%, especially 30-60wt%, relative to the total mass of the cosmetic composition, of one or more cosmetically acceptable carriers, and (D) 5-60 wt.%, preferably 7.5-40 wt.%, in particular 10-30 wt.%, relative to the total mass of the cosmetic composition, of one or more other cosmetically acceptable components different from components (a) - (C).

Description

Use of sulfur-containing polymers for improving sun protection The present invention relates to the use of a polymer comprising one or more synthetic polymer units comprising repeating units of the structure of formula (1) for increasing the UV and/or blue light absorption of one or more UV and/or blue light filters: 。 Furthermore, the present invention relates to a sunscreen composition comprising such a polymer, one or more UV and/or blue light filters and one or more cosmetically acceptable carriers. Exposure to sunlight can have desirable effects, such as stimulating vitamin D production and tanning. However, if the intensity or duration of the exposure is too high, low wavelength UV-B light below 315nm can lead to erythema, i.e. redness of the skin, also known as sunburn. Serious tissue damage may occur, including actinic keratosis and skin cancer. Furthermore, the skin may age prematurely. Therefore, protection from sunlight is often desirable, especially on areas of the skin not covered by UV protective clothing. Many sunscreen formulations have been known for decades. Typically, such compositions comprise one or more UV and/or blue light filters, for example UV filters. A large number of UV and/or blue light filters in different compositions are known in the art, for example as shown in WO 2010/043588 and WO 2019/096960. Such a large number of UV and/or blue light filters can be classified in different ways, for example, bis-ethylhexyloxyphenol methoxyphenyl triazine, oil-soluble organic UV absorbers, poorly soluble organic UV absorbers, inorganic UV absorbers and water-soluble UV absorbers, as shown in WO 2010/043588. The sun protection effect of UV and/or blue light filters known in the art is not entirely satisfactory. When moderate levels are used, the sun protection efficacy (e.g., high Sun Protection Factor (SPF)) is limited. Thus, to achieve the desired SPF, typically in the range >30, a very large amount of UV and/or blue light filter is required. Generally, the biodegradability is relatively poor with relatively high efficacy per unit amount and thus allowing the use of relatively small amounts of UV and/or blue filters. On the other hand, when good biodegradability is desired, it is generally necessary to accept a lower sun protection efficacy or to require a higher amount of such UV and/or blue light filters. In other words, it is challenging to provide compositions that are readily biodegradable and still have high sun protection efficacy, such as high Sun Protection Factor (SPF). In addition, in the case of particulate UV and/or blue light filters (e.g., some inorganic agents), large amounts of such materials are more difficult to apply uniformly to the skin and may result in undesirable bright spots on the skin. Thus, there remains an unmet need to improve the efficacy of UV and/or blue filters. It is particularly desirable to provide a sunscreen composition having higher biodegradability and still having good or even improved sunscreen efficacy compared to compositions containing UV and/or blue light filters but no synergistic ingredients. Surprisingly, it has been found that polymers comprising one or more synthetic polymer units comprising repeating units of the structure of formula (1) significantly improve the sun protection effect by increasing the UV and/or blue light absorption of one or more UV and/or blue light filters. It has also surprisingly been found that it is possible to provide compositions having a rather high biodegradability and having such good sun protection effect. One aspect of the invention relates to the use of a polymer comprising (or consisting of) one or more of the following units for increasing the UV and/or blue light absorption of one or more UV and/or blue light filters: (i) One or more synthetic polymer units comprising (or consisting of) the following units: (a) A repeat unit of the structure of formula (1): Wherein the method comprises the steps of R 1 and R 2 are independently selected from H, methyl or ethyl; a is a linear or branched C 1-C12 alkyl radical, and Q + is a cosmetically acceptable cation, and (B) Optionally one or more crosslinking or branching units, and (C) Optionally one or more other repeating units which are different from the repeating units of formula (1) and from the crosslinking or branching units, and (Ii) One or more water-soluble and/or water-swellable polysaccharide polymer units. It has been found that such polymers comprising one or more synthetic polymer units comprising repeating units of the structure of formula (1) lead to a significant improvement of the sun protection effect when added to compositions comprising UV and/or blue light filters. The use of the present invention may be to increase the UV and/or blue light absorption of a UV and/or blue light filter in a composition comprising at least one UV and/or blue light filter and optionally comprising one or more other cosmetically acceptable components. The po