Polymer and composition

Abstract

The present invention addresses the problem of providing a polymer and a composition which have excellent ultraviolet shielding properties and which, when added to water, give an aqueous solution having excellent appearance. This polymer contains a repeating unit A having a structure represented by formula (A1) and a repeating unit B having a hydrophilic group. # imgabs0 #

Description

Technical Field

[0001] The present invention relates to a polymer and a composition. Background Art

[0002] In order to shield ultraviolet rays, inorganic and organic ultraviolet absorbers are used. Organic ultraviolet absorbers are usually oil-soluble compounds (e.g., polymers), and are often used in combination with organic solvents. On the other hand, when ultraviolet absorbers and aqueous media are used in combination, ultraviolet absorbers are sometimes dissolved in oily components to prepare oil-in-water emulsion compositions.

[0003] For example, Patent Document 1 discloses a polymer having a specific structure as an ultraviolet absorber.

[0004] Previous technical literature

[0005] Patent Literature

[0006] Patent Document 1: International Publication No. 2016 / 210140 Summary of the invention

[0007] Technical issues to be solved by the invention

[0008] There is a demand for a polymer which has excellent ultraviolet shielding properties and, from the viewpoint of environmental load, also has an excellent appearance of the aqueous solution obtained when added to water.

[0009] The excellent appearance of the aqueous solution obtained when added to water means that the aqueous solution obtained when the polymer is added to water has less turbidity.

[0010] As a result of studying the polymer disclosed in Patent Document 1, the present inventors have found that it is difficult to achieve both ultraviolet shielding properties and the appearance of the aqueous solution obtained when added to water, and that there is room for further improvement.

[0011] In view of the above circumstances, an object of the present invention is to provide a polymer which has excellent ultraviolet shielding properties and which produces an aqueous solution excellent in appearance when added to water.

[0012] Furthermore, another object of the present invention is to provide a composition involving the above-mentioned polymer.

[0013] Means for solving technical problems

[0014] As a result of intensive studies on the above-mentioned problems, the present inventors have found that the above-mentioned problems can be solved by the following configuration.

[0015] [1]

[0016] A polymer comprising a repeating unit A having a structure represented by the formula (A1) described below and a repeating unit B having a hydrophilic group.

[0017] [2]

[0018] The polymer according to [1], wherein

[0019] The repeating unit A has a structure represented by the formula (A2) described below.

[0020] 〔3〕

[0021] The polymer according to [1] or [2], wherein

[0022] The repeating unit A and the repeating unit B include repeating units derived from a monomer having at least one polymerizable group selected from the group consisting of a (meth)acrylic acid group, a styryl group, a (meth)acrylamide group, and a vinyl ether group.

[0023] [4]

[0024] The polymer according to [1] or [2], wherein

[0025] The repeating unit A has a structure represented by the formula (A3) described below.

[0026] 〔5〕

[0027] The polymer according to any one of [1] to [4], wherein

[0028] The hydrophilic group contained in the repeating unit B is at least one group selected from the group consisting of a carboxylic acid group, a sulfonic acid group, and salts thereof.

[0029] [6]

[0030] The polymer according to any one of [1] to [5], wherein

[0031] The repeating unit B has a repeating unit derived from at least one monomer selected from the group consisting of (meth)acrylic acid, itaconic acid, β-carboxyethyl (meth)acrylate, 2-(meth)acrylamide-2-methylpropanesulfonic acid, 3-sulfopropyl (meth)acrylate, and salts thereof.

[0032] 〔7〕

[0033] A composition comprising the polymer described in any one of [1] to [6] and water.

[0034] Effects of the Invention

[0035] According to the present invention, it is possible to provide a polymer which is excellent in ultraviolet shielding property and which produces an aqueous solution excellent in appearance when added to water.

[0036] Furthermore, the present invention can also provide a composition related to the above polymer. DETAILED DESCRIPTION

[0037] In the present specification, a numerical range expressed by "to" means a range including the numerical values ​​described before and after "to" as the lower limit and the upper limit.

[0038] In the present specification, when two or more kinds of a certain component are present, the "content" of the component means the total content of these two or more kinds of components.

[0039] In this specification, the weight average molecular weight is a polystyrene conversion value measured by GPC (Gel Permeation Chromatography).

[0040] Unless otherwise specified, the bonding direction of the divalent groups marked in this specification is not limited. For example, when Y in the compound represented by the formula "XYZ" is -COO-, Y can be -CO-O- or -O-CO-. Furthermore, the above compound can be "X-CO-OZ" or "XO-CO-Z".

[0041] In this specification, "ultraviolet rays" refer to light with a wavelength in the range of 10 to 400 nm.

[0042] In the present specification, “(meth)acrylic acid” means at least one of acrylic acid and methacrylic acid, “(meth)acrylate” means at least one of acrylate and methacrylate, and “(meth)acryloyl” means at least one of acryloyl and methacryloyl.

[0043] [polymer]

[0044] The polymer of the present invention (hereinafter also referred to as “specific polymer”) comprises a repeating unit A having a structure represented by formula (A1) and a repeating unit B having a hydrophilic group.

[0045] It is presumed that the repeating unit A of the specific polymer improves the ultraviolet shielding property and the repeating unit B improves the water solubility of the specific polymer. Therefore, the specific polymer is excellent in both ultraviolet shielding property and the appearance of the aqueous solution obtained when added to water (water solubility of the polymer).

[0046] Hereinafter, the effect of obtaining at least one of more excellent ultraviolet shielding properties and more excellent appearance of an aqueous solution obtained when a specific polymer is added to water is also referred to as “more excellent effects of the present invention”.

[0047] Hereinafter, each repeating unit of the specific polymer will be described in detail.

[0048] 〔Repeating unit A〕

[0049] The specific polymer has a repeating unit A.

[0050] The repeating unit A has a structure represented by formula (A1).

[0051] [Chemical formula 1]

[0052]

[0053] In formula (A1), Y 11 or Y 12 One of them represents a cyano group, and the other represents a cyano group, an alkylcarbonyl group which may have a substituent, an arylcarbonyl group which may have a substituent, a heterocyclic carbonyl group which may have a substituent, an alkylsulfonyl group which may have a substituent, an arylsulfonyl group which may have a substituent, a carbamoyl group which may have a substituent, an aminosulfonyl group which may have a substituent, an alkoxycarbonyl group which may have a substituent, or an aryloxycarbonyl group which may have a substituent.

[0054] V 11 Indicates *1-L V11 -*2. V 12 represents a hydrogen atom, a monovalent substituent, or *1-L V12 -*2.L V11 and L V12 Each independently represents a single bond or a divalent linking group. *1 represents the bonding position to the main chain of the specific polymer. *2 represents the bonding position to the benzene ring indicated in formula (A1).

[0055] R 11 and R 12 Each independently represents a hydrogen atom or a monovalent substituent.

[0056] As Y 11 and Y 12 The alkylcarbonyl group which may have a substituent is preferably an alkylcarbonyl group having 2 to 8 carbon atoms which may have a substituent, more preferably an acetyl group, an ethylcarbonyl group or a tert-butylcarbonyl group, further preferably an ethylcarbonyl group or a tert-butylcarbonyl group.

[0057] As Y 11 and Y 12 The arylcarbonyl group which may have a substituent is preferably an arylcarbonyl group having 2 to 14 carbon atoms which may have a substituent, more preferably a benzoyl group or a naphthoyl group, and still more preferably a benzoyl group.

[0058] As Y 11 and Y 12The heterocyclic carbonyl group which may have a substituent is preferably a heterocyclic carbonyl group having 2 to 14 carbon atoms which may have a substituent, more preferably a 2-pyridinecarbonyl group or a 2-thiophenecarbonyl group, and still more preferably a 2-pyridinecarbonyl group. The heterocyclic ring constituting the heterocyclic carbonyl group may be either aromatic or non-aromatic.

[0059] As Y 11 and Y 12 The alkylsulfonyl group which may have a substituent is preferably an alkylsulfonyl group having 1 to 4 carbon atoms which may have a substituent, and more preferably a methylsulfonyl group.

[0060] As Y 11 and Y 12 The arylsulfonyl group which may have a substituent is preferably an arylsulfonyl group having 6 to 10 carbon atoms which may have a substituent, and more preferably a benzenesulfonyl group.

[0061] As Y 11 and Y 12 The carbamoyl group which may have a substituent is preferably an unsubstituted carbamoyl group or an alkylcarbamoyl group having 1 to 9 carbon atoms which may have a substituent, more preferably an unsubstituted carbamoyl group or an alkylcarbamoyl group having 1 to 4 carbon atoms which may have a substituent, further preferably a carbamoyl group, an N-methylcarbamoyl group, an N,N-dimethylcarbamoyl group or an N-phenylcarbamoyl group.

[0062] As Y 11 and Y 12 The sulfamoyl group which may have a substituent is preferably an alkylsulfamoyl group having 1 to 7 carbon atoms which may have a substituent, a dialkylsulfamoyl group having 3 to 6 carbon atoms which may have a substituent, an arylsulfamoyl group having 6 to 11 carbon atoms which may have a substituent, or a heterocyclicsulfamoyl group having 2 to 10 carbon atoms which may have a substituent, and more preferably a sulfamoyl group, a methylsulfamoyl group, an N,N-dimethylsulfamoyl group, a phenylsulfamoyl group or a 4-pyridylsulfamoyl group.

[0063] As Y 11 and Y 12 The alkoxycarbonyl group which may have a substituent is preferably an alkoxycarbonyl group having 2 to 4 carbon atoms which may have a substituent, more preferably a methoxycarbonyl group, an ethoxycarbonyl group or a (t)-butoxycarbonyl group, further preferably a methoxycarbonyl group or an ethoxycarbonyl group, and particularly preferably an ethoxycarbonyl group.

[0064] As Y 11 and Y 12The aryloxycarbonyl group which may have a substituent is preferably an aryloxycarbonyl group having 6 to 12 carbon atoms which may have a substituent, more preferably an aryloxycarbonyl group having 6 to 10 carbon atoms which may have a substituent, and still more preferably a phenoxycarbonyl group, 4-nitrophenoxycarbonyl group, 4-acetylaminophenoxycarbonyl group or 4-methylsulfonylphenoxycarbonyl group.

[0065] As Y 11 and Y 12 Examples of the substituent that each group represented may have include an alkyl group, an alkoxy group, and an aryl group, and an alkoxy group is preferred.

[0066] Y 11 or Y 12 One of them represents a cyano group, and the other preferably represents a cyano group, an alkylcarbonyl group which may have a substituent, an arylcarbonyl group which may have a substituent, a heterocyclic carbonyl group which may have a substituent, a carbamoyl group which may have a substituent, or an alkoxycarbonyl group which may have a substituent, and more preferably Y 11 or Y 12 One of them represents a cyano group, and the other represents a cyano group, an alkylcarbonyl group which may have a substituent, an arylcarbonyl group which may have a substituent, a carbamoyl group which may have a substituent, or an alkoxycarbonyl group which may have a substituent, and more preferably Y 11 or Y 12 One of them represents a cyano group, and the other represents a cyano group, an alkylcarbonyl group having 3 to 18 carbon atoms which may have a substituent, an arylcarbonyl group having 7 to 18 carbon atoms which may have a substituent, a carbamoyl group which may have a substituent, or an alkoxycarbonyl group having 3 to 18 carbon atoms which may have a substituent, and Y is particularly preferred 11 or Y 12 One of the groups represents a cyano group, and the other represents a cyano group, an ethylcarbonyl group, a tert-butylcarbonyl group, a benzoyl group or an ethoxycarbonyl group, and the most preferred group is Y 11 and Y 12 It represents cyano.

[0067] In formula (A1), V 11 Indicates *1-L V11 -*2.L V11 It represents a single bond or a divalent linking group.

[0068] As L V11 Examples of the divalent linking group represented by include -O-, -S-, -CO-, -COO-, and -CONR N-, alkylene, alkenylene, arylene, and a divalent linking group formed by combining them. As a divalent linking group formed by combining these, preferably -COO-alkylene-O- or -COO-alkylene-CO-, more preferably *1-COO-alkylene-O-*2 or *1-COO-alkylene-CO-*2. R N represents a hydrogen atom or a monovalent substituent.

[0069] The alkylene group may be linear, branched or cyclic, but is preferably linear.

[0070] The alkylene group has preferably 1 to 30 carbon atoms, more preferably 1 to 10 carbon atoms, and even more preferably 1 to 5 carbon atoms.

[0071] As L V11 , preferably *1-X 1 -X 2 -O-*2 or *1-X 1 -X 2 -CO-*2.X 1 and X 2 and X in formula (A3) 1 and X 2 The meaning is the same and the preferred method is also the same.

[0072] In formula (A1), V 12 represents a hydrogen atom, a monovalent substituent, or *1-L V12 -*2.L V12 It represents a single bond or a divalent linking group.

[0073] As V 12 Examples of the monovalent substituent represented by include a halogen atom, a mercapto group, a cyano group, a carboxyl group, a phosphate group, a sulfo group, a hydroxyl group, a carbamoyl group, a sulfamoyl group, a nitro group, an alkoxy group, an aryloxy group, an acyl group, an acyloxy group (-OCOR), an acylamino group, a sulfonyl group, a sulfinyl group, a sulfonylamino group, an amino group, an ammonium group, a hydrazine group, a urea group, an imide group, an alkylthio group, an arylthio group, an alkenylthio group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkyl group, and an aryl group. 12 The group exemplified as a monovalent substituent represented by may further have a substituent (for example, Y 11 and Y 12 substituents that may be present, etc.).

[0074] As V 12, preferably cyano, nitro, hydroxy, alkoxy, aryloxy or acyloxy, more preferably alkoxy, aryloxy or acyloxy, further preferably alkoxy or acyloxy, especially preferably methoxy, ethoxy, isopropoxy, 2-ethylhexyloxy, 3,5,5-trimethylhexyloxy, acetoxy, propionyloxy, n-butyryloxy, tert-butyryloxy, 2-ethylhexanoyloxy, 3,5,5-trimethylhexanoyloxy or 4-(4-propylcyclohexyl)cyclohexylcarbonyloxy.

[0075] As L V12 The divalent linking group represented by may be, for example, L V11 The divalent linking group represented by .

[0076] As V 12 , preferably a monovalent substituent or *1-L V12 -*2. And, in V 12 Indicates *1-L V12 -*2, L V12 It is also preferred to express with L V11 Same group.

[0077] *1 indicates the bonding position to the main chain of the specific polymer. *2 indicates the bonding position to the benzene ring indicated in formula (A1).

[0078] * The benzene ring indicated in the formula (A1) in 2 refers to the benzene ring constituting benzodithiol in the formula (A1), which is V 11 、V 12 , R 11 and R 12 Directly bonded benzene ring.

[0079] Hereinafter, *1 and *2 will be described in detail by taking an example of the specific polymer.

[0080] For example, in V 11 Indicates *1-COO-(CH2)4-O-*2, V 12 When represents a hydrogen atom, as an example of a specific polymer, there can be mentioned an embodiment having a repeating unit represented by formula (PX) as the repeating unit A. 11 Indicates *1-COO-(CH2)4-O-*2, V 12 When *1-COO-(CH2)4-O-*2 is represented, an embodiment having a repeating unit represented by the formula (PY) as the repeating unit A can be given as an example of the specific polymer.

[0081] In formula (PX) and formula (PY), Y 11 , Y 12 , R 11 and R 12Each symbol has the same meaning as in formula (A1).

[0082] [Chemical formula 2]

[0083]

[0084] In formula (A1), R 11 and R 12 Each independently represents a hydrogen atom or a monovalent substituent.

[0085] As R 11 and R 12 Examples of the monovalent substituent represented by include V 12 The monovalent substituent represented by is preferably an alkyl group which may have a substituent, and more preferably an unsubstituted alkyl group.

[0086] The alkyl group may be linear, branched or cyclic.

[0087] The alkyl group has preferably 1 to 30 carbon atoms, more preferably 1 to 10 carbon atoms, and even more preferably 1 to 5 carbon atoms.

[0088] Examples of the alkyl group include a methyl group, an ethyl group, a propyl group, and a butyl group (preferably a tert-butyl group).

[0089] Preferred R 11 or R 12 One of them represents a hydrogen atom, and the other represents a hydrogen atom or an alkyl group which may have a substituent, and more preferably R 11 or R 12 One of them represents a hydrogen atom, and the other represents an alkyl group which may have a substituent.

[0090] The repeating unit A preferably has a structure represented by formula (A2).

[0091] [Chemical formula 3]

[0092]

[0093] In formula (A2), V 21 Indicates *1-L V21 -*2. V 22 represents a hydrogen atom, a monovalent substituent, or *1-L V22 -*2.L V21 and L V22 Each independently represents a single bond or a divalent linking group. *1 represents the bonding position to the main chain of the specific polymer. *2 represents the bonding position to L indicated in formula (A2). a21 or L a22 bonding position.

[0094] L a21 and La22 Each independently represents -O- or -CO-.

[0095] R 21 and R 22 Each independently represents a hydrogen atom or a monovalent substituent.

[0096] In formula (A2), V 21 Indicates *1-L V21 -*2.L V21 It represents a single bond or a divalent linking group.

[0097] As L V21 The divalent linking group represented by may be, for example, L V11 The divalent linking group represented by is preferably -COO-alkylene-, and more preferably *1-COO-alkylene-*2.

[0098] In formula (A2), V 22 represents a hydrogen atom, a monovalent substituent, or *1-L V22 -*2.L V22 It represents a single bond or a divalent linking group.

[0099] As L V21 The divalent linking group represented by may be, for example, L V11 The divalent linking group represented by is preferably -COO-alkylene-, and more preferably *1-COO-alkylene-*2.

[0100] In V 22 Indicates *1-L V22 -*2, L V22 It is also preferred to express with L V21 Same group.

[0101] In formula (A2), L a21 and L a22 Each independently represents -O- or -CO-.

[0102] As L a21 and L a22 , preferably -O-. And, L a21 and L a22 It also preferably represents the same group.

[0103] In formula (A2), R 21 and R 22 With R 11 and R 12 The meaning is the same and the preferred method is also the same.

[0104] In the formula (A2), the meanings of *1 and *2 may refer to the meanings of *1 and *2 in the formula (A1).

[0105] The repeating unit A also preferably has a structure represented by formula (A3).

[0106] [Chemical formula 4]

[0107]

[0108] In formula (A3), V 31 represents a hydrogen atom, a monovalent substituent, or *1-L V31 -*2.L V31 represents a single bond or a divalent linking group. *1 represents the bonding position to the main chain of the specific polymer. *2 represents the bonding position to L explicitly indicated in formula (A3). a31 The bonding position of

[0109] L a31 and L a32 Each independently represents -O- or -CO-,

[0110] R 31 and R 32 R each independently represents a hydrogen atom or a monovalent substituent. 33 represents a hydrogen atom or a methyl group.

[0111] X 1 represents phenylene, -COO-, -CONH-, -O-, -CO- or -CH2-. 2 It represents a single bond or a divalent linking group.

[0112] V 31 With V 22 The meaning is the same and the preferred method is also the same.

[0113] L a31 and L a32 With L a21 and L a22 The meaning is the same and the preferred method is also the same.

[0114] R 31 and R 32 With R 11 and R 12 The meaning is the same and the preferred method is also the same.

[0115] In formula (A3), X 1 It represents phenylene, -COO-, -CONH-, -O- or -CO-.

[0116] As X 1 , preferably phenylene, -COO- or -CONH-, more preferably -COO-.

[0117] In formula (A3), X2 It represents a single bond or a divalent linking group.

[0118] As X 2 The divalent linking group represented by may be, for example, L V22 The divalent linking group represented by .

[0119] The repeating unit A also preferably has a repeating unit derived from a monomer having at least one polymerizable group selected from the group consisting of a (meth)acrylic acid group, a styryl group, a (meth)acrylamide group, and a vinyl ether group.

[0120] The content of the repeating unit A is preferably 10 to 99 mass % relative to the total mass of the specific polymer, more preferably 30 to 99 mass %, further preferably 40 to 97 mass %, particularly preferably 50 to 95 mass % from the viewpoint of more excellent effects of the present invention.

[0121] 〔Repeating unit B〕

[0122] The specific polymer has a repeating unit B.

[0123] The repeating unit B is a repeating unit having a hydrophilic group.

[0124] Examples of the hydrophilic group include carboxylic acid groups and salts thereof; sulfonic acid groups and salts thereof; phosphoric acid groups and salts thereof; and nonionic hydrophilic groups such as hydroxyl groups, amino groups, betaine groups, ethylene glycol groups, polyethylene glycol groups, propylene glycol groups, polypropylene glycol groups, and amide groups.

[0125] The hydrophilic group is preferably at least one group selected from the group consisting of carboxylic acid groups and salts thereof, sulfonic acid groups and salts thereof, and hydroxyl groups, and more preferably at least one group selected from the group consisting of carboxylic acid groups and salts thereof and sulfonic acid groups and salts thereof.

[0126] The number of the hydrophilic groups possessed by the repeating unit B may be 1 or 2 or more.

[0127] The repeating unit B is preferably a repeating unit derived from a monomer having a hydrophilic group and a polymerizable group.

[0128] The polymerizable group is preferably an ethylenically unsaturated group, more preferably a vinyl group, a (meth)acryloyl group, a styryl group or a maleimide group, and still more preferably a vinyl group or a (meth)acryloyl group.

[0129] Examples of the monomer having a carboxylic acid group or a salt thereof and a polymerizable group include acrylic acid, methacrylic acid, crotonic acid, itaconic acid, maleic acid, fumaric acid, citraconic acid, 2-methacryloyloxymethylsuccinic acid, β-carboxyethyl acrylate, and salts thereof.

[0130] Examples of the monomer having a sulfonic acid group or a salt thereof and a polymerizable group include styrenesulfonic acid, 2-acrylamide-2-methylpropanesulfonic acid, 3-sulfopropyl (meth)acrylate, bis-(3-sulfopropyl)-itaconate, and salts thereof.

[0131] Examples of the monomer having a phosphoric acid group or a salt thereof and a polymerizable group include vinylphosphonic acid, vinyl phosphate, bis(methacryloyloxyethyl)phosphate, diphenyl-2-acryloyloxyethyl phosphate, diphenyl-2-methacryloyloxyethyl phosphate, dibutyl-2-acryloyloxyethyl phosphate, and salts thereof.

[0132] Examples of the monomer having a nonionic hydrophilic group and a polymerizable group include ethylenically unsaturated monomers having a (poly)ethyleneoxy group or a polypropyleneoxy group, such as 2-methoxyethyl (meth)acrylate, 2-(2-methoxyethoxy)ethyl (meth)acrylate, ethoxytriethylene glycol (meth)acrylate, methoxypolyethylene glycol (molecular weight: 200 to 1000) mono(meth)acrylate, and polyethylene glycol (molecular weight: 200 to 1000) mono(meth)acrylate; and ethylenically unsaturated monomers having a hydroxyl group, such as hydroxymethyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 2,3-dihydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, hydroxypentyl (meth)acrylate, and hydroxyhexyl (meth)acrylate.

[0133] The repeating unit B preferably has a repeating unit derived from at least one monomer selected from the group consisting of (meth)acrylic acid, itaconic acid, β-carboxyethyl (meth)acrylate, 2-(meth)acrylamide-2-methylpropanesulfonic acid, 3-sulfopropyl (meth)acrylate and salts thereof, and 2,3-dihydroxypropyl (meth)acrylate, more preferably has a repeating unit derived from at least one monomer selected from the group consisting of (meth)acrylic acid, itaconic acid, β-carboxyethyl (meth)acrylate, 2-(meth)acrylamide-2-methylpropanesulfonic acid, 3-sulfopropyl (meth)acrylate and salts thereof, and further preferably has a repeating unit derived from at least one monomer selected from the group consisting of (meth)acrylic acid, β-carboxyethyl (meth)acrylate, 2-(meth)acrylamide-2-methylpropanesulfonic acid, 3-sulfopropyl (meth)acrylate and salts thereof.

[0134] Examples of the salt of the carboxylic acid group, the sulfonic acid group and the phosphoric acid group include alkali metal salts (e.g., lithium salts, sodium salts and potassium salts), alkaline earth metal salts (e.g., barium salts and calcium salts) and ammonium salts, and alkali metal salts are preferred.

[0135] The repeating unit B is preferably a repeating unit represented by formula (B).

[0136] [Chemical formula 5]

[0137]

[0138] In formula (B), R B represents a hydrogen atom or a methyl group. B represents a single bond or a divalent linking group. Z represents a hydrophilic group.

[0139] The hydrophilic group represented by Z is as described above.

[0140] As L B The divalent linking group represented by may be, for example, L V11 The divalent linking group represented by is preferably -COO-, alkylene, -CONR N - and a divalent linking group formed by combining them. The substituent that the alkylene group may have is preferably a hydrophilic group possessed by the repeating unit B, and more preferably a hydroxyl group. N represents a hydrogen atom or a monovalent substituent.

[0141] The content of the repeating unit B is preferably 1 to 90 mass % relative to the total mass of the specific polymer, more preferably 1 to 70 mass %, further preferably 1 to 50 mass %, particularly preferably 5 to 40 mass %, and most preferably 7 to 30 mass % from the viewpoint of better effects of the present invention.

[0142] The specific polymer may have a repeating unit C in addition to the repeating unit A and the repeating unit B.

[0143] Examples of the repeating unit C include a repeating unit derived from an alkyl (meth)acrylate.

[0144] Examples of the specific polymer include the following polymers.

[0145] [Chemical formula 6]

[0146]

[0147] [Chemical formula 7]

[0148]

[0149] The weight average molecular weight of the specific polymer is preferably 1,000 to 500,000, more preferably 1,000 to 100,000, further preferably 1,000 to 50,000, and particularly preferably 3,000 to 50,000 from the viewpoint of achieving more excellent effects of the present invention.

[0150] When the content is within the above range, when a composition containing the specific polymer and water is prepared, the solubility or dispersibility in water is good, and the viscosity of the cosmetic described below can be appropriately maintained.

[0151] The total content of the repeating unit A and the repeating unit B in the specific polymer is preferably 10 to 100 mass %, more preferably 50 to 100 mass %, further preferably 90 to 100 mass %, particularly preferably 96 to 100 mass % relative to the total mass of the specific polymer.

[0152] Furthermore, the specific polymer also preferably has only the repeating unit A and the repeating unit B as repeating units.

[0153] The mass ratio of the content of the repeating unit B to the content of the repeating unit A in the specific polymer (content of the repeating unit B / content of the repeating unit A) is preferably 0.1 to 10, more preferably 0.1 to 3, and further preferably 0.1 to 1.5.

[0154] [Composition]

[0155] The composition comprises a specific polymer.

[0156] The composition preferably comprises the specific polymer and water.

[0157] The form of the composition can be appropriately selected according to the intended use of the composition, and specific examples thereof include cosmetics such as aqueous compositions, emulsified compositions, gel compositions, and solid compositions.

[0158] The aqueous composition is a composition comprising a specific polymer and water, wherein the content of water exceeds 50% by mass relative to the total mass of the aqueous composition. The aqueous composition preferably comprises only components selected from the group consisting of a specific polymer, water, and an alkaline compound, and comprises a specific polymer and water, wherein the content of water exceeds 50% by mass relative to the total mass of the aqueous composition.

[0159] The cosmetic is a composition other than an aqueous composition and is a composition containing a specific polymer.

[0160] The cosmetic preferably contains at least one (preferably at least three) selected from the group consisting of basic compounds, oils, hydrocarbons, fatty acids, alcohol compounds, ester compounds, hydrophilic thickeners, surfactants, and preservatives described below.

[0161] The emulsified composition may be in the form of an emulsion or a cream, and the emulsified state may be in the form of an oil-in-water droplet (O / W type) or a water-in-oil droplet (W / O type).

[0162] When the composition is an emulsified composition, the composition preferably contains a specific polymer, water, and an oil agent.

[0163] [Specific polymer]

[0164] The composition comprises a specific polymer.

[0165] The specific polymer may be used alone or in combination of two or more.

[0166] When the composition is an aqueous composition, the content of the specific polymer is preferably 50.0 to 100.0 mass %, more preferably 90.0 to 100.0 mass %, and further preferably 95.0 to 100.0 mass %, relative to the total solid content of the aqueous composition. Furthermore, the content of the specific polymer is preferably 1.0 mass % or more and less than 50.0 mass %, more preferably 5.0 mass % or more and less than 50.0 mass %, and further preferably 10.0 mass % or more and less than 50.0 mass %, relative to the total mass of the aqueous composition.

[0167] When the composition is a cosmetic, the content of the specific polymer is preferably 0.01 to 45.0% by mass, more preferably 0.1 to 40.0% by mass, and even more preferably 0.5 to 35.0% by mass, based on the total solid content of the cosmetic.

[0168] In the present specification, the solid content refers to the total mass of components obtained by removing the solvent (water and organic solvent) from all the components of the composition.

[0169] 〔water〕

[0170] The composition may also contain water.

[0171] When the composition includes water, the specific polymer is easily dissolved or dispersed in the composition. In other words, the specific polymer has the repeating unit B, so the appearance of the aqueous solution obtained when added to water is excellent. In addition, when the composition includes water, the specific polymer can be dissolved or dispersed in the composition at a high concentration, so the ultraviolet shielding property can be further improved.

[0172] Examples of water include natural water, purified water, distilled water, ion-exchanged water, pure water, and ultrapure water. From the perspective of having few impurities, water is preferably purified water, distilled water, ion-exchanged water, pure water, or ultrapure water.

[0173] When the composition is an aqueous composition, the content of water relative to the total mass of the aqueous composition exceeds 50 mass %, preferably exceeds 50.0 mass % and is 99.0 mass % or less, more preferably exceeds 50.0 mass % and is 95.0 mass % or less, and further preferably exceeds 50.0 mass % and is 90.0 mass % or less.

[0174] When the composition is a cosmetic, the content of water is preferably 10.0 to 80.0% by mass, more preferably 20.0 to 70.0% by mass, and even more preferably 30.0 to 60.0% by mass, based on the total mass of the cosmetic.

[0175] 〔Basic compounds〕

[0176] The composition may also contain a basic compound.

[0177] A basic compound is a compound whose aqueous solution obtained by dissolving in water shows alkalinity.

[0178] In the case where the composition includes a basic compound, a specific polymer is more easily dissolved or more easily dispersed in the composition.

[0179] The basic compound can be used to make the hydrophilic group contained in the repeating unit B in the specific polymer into a salt form.

[0180] Examples of the basic compound include ammonia such as ammonium hydrogen carbonate and salts thereof; alkanolamines such as monoethanolamine, isopropanolamine, 2-amino-2-methylpropanol and 2-aminobutanol; and inorganic bases such as sodium carbonate, potassium carbonate, sodium hydrogen carbonate and potassium hydrogen carbonate.

[0181] 〔Oil〕

[0182] The composition may also contain an oil.

[0183] Oils are different from the above ingredients.

[0184] Examples of the oil include silicone oils (e.g., dimethicone and cyclopentasiloxane), hydrocarbon oils (e.g., liquid paraffin, vaseline, paraffin, squalane, beeswax, and carnauba wax), olive oil, lanolin, fatty acids, higher fatty acids, ester oils (e.g., octyldodecyl myristate, ethylhexyl palmitate, isononyl isononanoate, and tri(caprylyl / octanoic acid)glyceryl), ceresin, microcrystalline wax, candelilla wax, diglyceryl, triglyceride, jojoba oil, and neopentyl glycol diethylhexanoate.

[0185] 〔hydrocarbon〕

[0186] The composition may also contain hydrocarbons.

[0187] Hydrocarbons are different from the various components mentioned above.

[0188] Hydrocarbons are chemical compounds that include carbon atoms and hydrogen atoms.

[0189] The hydrocarbon may be linear, branched, or cyclic, and is preferably linear or branched.

[0190] The hydrocarbon may be either saturated or unsaturated, and may be either aliphatic or aromatic.

[0191] Examples of the hydrocarbon include mineral oil (e.g., light oil and heavy oil), petrolatum, microcrystalline wax, paraffinic compounds, isoparaffinic compounds, and hydrogenated isoparaffinic compounds, preferably polydecene, polybutene, hydrogenated polyisobutene, squalane, isohexadecane, or isododecane.

[0192] 〔fatty acid〕

[0193] The composition may also comprise fatty acids.

[0194] Fatty acids are different from the various ingredients mentioned above.

[0195] Examples of fatty acids include natural fatty acids synthesized using animal and plant fats and oils as raw materials, and linear and branched synthetic fatty acids.

[0196] Examples of the fatty acid include lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, and isostearic acid.

[0197] 〔Alcohol compounds〕

[0198] The composition may also contain an alcohol compound.

[0199] The alcohol compound is different from the above-mentioned various components (for example, specific polymer, etc.).

[0200] As alcohol compounds, for example, aliphatic alcohols, aromatic alcohols and sugars can be cited. Aliphatic alcohols are compounds containing aliphatic hydrocarbons such as saturated aliphatic hydrocarbons or unsaturated aliphatic hydrocarbons and hydroxyl groups (aliphatic hydrocarbons having hydroxyl groups). Aromatic alcohols are compounds containing aromatic hydrocarbons and hydroxyl groups (aromatic hydrocarbons having hydroxyl groups). The hydroxyl group possessed by the above aromatic alcohols may be any of an ethereal hydroxyl group and a phenolic hydroxyl group.

[0201] The alcohol compound has preferably 1 to 40 carbon atoms, more preferably 5 to 30 carbon atoms.

[0202] Examples of the aliphatic alcohol include monovalent alcohol compounds such as cetyl alcohol, stearyl alcohol, cetearyl alcohol, oleyl alcohol, octyldodecanol, behenyl alcohol and Guerbet alcohol; and polyvalent alcohol compounds such as ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, glycerol, polyglycerol, 3-methyl-1,3-butanediol and 1,3-butanediol.

[0203] Examples of the sugar include sorbitol, D-sorbitol, glucitol, mannitol, glucose, sucrose, lactose, maltose, maltitol, and trehalose.

[0204] 〔Ester compounds〕

[0205] The composition may also contain an ester compound.

[0206] The ester compound is different from the above-mentioned various components.

[0207] The ester compound is a compound (a compound having an ester bond) obtained by a dehydration reaction of the above-mentioned fatty acid and the above-mentioned alcohol compound.

[0208] Examples of the ester compound include isopropyl myristate, isopropyl palmitate, isopropyl stearate, isopropyl isostearate, isopropyl oleate, n-butyl stearate, n-hexyl laurate, n-decyl oleate, isooctyl stearate, isononyl stearate, isononyl isononanoate, 2-ethylhexyl palmitate, 2-hexyl laurate, 2-hexyldecyl stearate, 2-octyldodecyl palmitate, oleyl oleate, Oleyl erucate, erucyl oleate, erucyl erucate, cetearyl caprylate, cetyl palmitate, cetyl stearate, cetyl oleate, cetyl behenate, cetyl acetate, myristyl myristate, myristyl behenate, myristyl oleate, myristyl stearate, myristyl palmitate, myristyl lactate, caprylic / propylene glycol decanoate, stearyl heptanoate, diisostearyl malate, and octyl hydroxystearate.

[0209] 〔Hydrophilic thickener〕

[0210] The composition may also contain a hydrophilic thickener.

[0211] Examples of the hydrophilic thickener include carboxyvinyl polymers (e.g., Carbopol and Pemulen); polyacrylamides (e.g., SEPIGEL 305 and SIMULGEL 600, manufactured by SEPPIC); polymers and copolymers of 2-acrylamide-2-methylpropane sulfonic acid that may be crosslinked or neutralized (e.g., Hostacerin AMPS: manufactured by Hoechst AG, SIMULGEL 800: manufactured by SEPPIC); copolymers of hydroxyethyl acrylate and 2-acrylamide-2-methylpropane sulfonic acid (e.g., SIMULGEL NS and SEPINOV EMT10, manufactured by SEPPIC); cellulose derivatives (e.g., hydroxyethyl cellulose and carboxymethyl cellulose); polysaccharides (e.g., xanthan gum); synthetic polymers (e.g., Intelimer IPA13-1 and Intelimer IPA13-6, manufactured by LANDEC); and hectorite and its derivatives (e.g., bentonite).

[0212] 〔Surfactant〕

[0213] The composition may also contain a surfactant.

[0214] Surfactants are different from the various ingredients mentioned above.

[0215] Examples of the surfactant include fatty alcohol polyglycol ether sulfates, monoglyceride sulfates, monoalkyl sulfosuccinates and / or dialkyl sulfosuccinates, fatty acid isethionates, fatty acid sarcosinates, fatty acid taurates, fatty acid glutamates, α-olefin sulfonates, ether carboxylic acids, alkyl oligoglucosides, fatty acid glucamides, alkyl amide betaines, and protein fatty acid condensation products.

[0216] 〔preservative〕

[0217] The composition may also contain a preservative.

[0218] Preservatives are different from the various ingredients listed above.

[0219] The composition preferably contains a preservative from the viewpoint of preventing the composition from being contaminated by microorganisms and maintaining quality and safety. In addition to the preservative effect, the preservative may also have a bactericidal effect and may be used to kill or reduce bacteria that proliferate on the skin.

[0220] Examples of the antiseptic include benzoic acid, salicylic acid, sorbic acid, p-hydroxybenzoic acid esters, benzalkonium chloride, benzethonium chloride, halocarban, 2,4,4-trichloro-2-hydroxyphenol, trichlorocarbanilide, zinc pyrithione, hinokitiol, and phenol.

[0221] [Other ingredients]

[0222] The composition may also contain other ingredients in addition to the above-mentioned various ingredients.

[0223] As other components, for example, polymers other than the specific polymer and ultraviolet absorbers other than the specific polymer can be mentioned. In addition, the description of Japanese Patent Application Laid-Open No. 2011-074070 can be mentioned, and the contents thereof are incorporated into this specification.

[0224] When the composition is a cosmetic, the viscosity of the cosmetic at 25° C. is preferably 10,000 to 300,000 mPa·s, more preferably 12,000 to 200,000 mPa·s, and even more preferably 14,000 to 50,000 mPa·s.

[0225] The above viscosity is a value measured using a BL type viscometer under the measurement conditions of rotor No. 4, 12 rpm, and 1 minute.

[0226] When the viscosity at 25° C. is 10,000 mPa·s or more, the stability of the cosmetic is further improved, and when it is 300,000 mPa·s or less, the cosmetic is less stretched when applied, and the feel during use can be improved.

[0227] [Method for producing composition]

[0228] As a method for producing the composition, for example, a known production method can be mentioned.

[0229] Specifically, there can be mentioned a method for producing a composition including the step of adding various components contained in the composition one by one or adding them all at once and mixing them.

[0230] As the mixing step, for example, there can be mentioned a method using a known stirrer.

[0231] In the mixing step, a heating treatment may be performed during mixing.

[0232] The temperature of the heat treatment is preferably 50 to 95°C, more preferably 70 to 80°C.

[0233] [use]

[0234] The composition is preferably used in cosmetics.

[0235] Examples of the cosmetics include skin care cosmetics such as lotions, serums, emulsions, and creams, sunscreen preparations, makeup cosmetics, hair care cosmetics, and body care cosmetics.

[0236] Example

[0237] Hereinafter, the present invention will be described in detail according to the embodiments. The materials, usage amounts, ratios, processing contents and processing steps etc. shown in the following embodiments can be appropriately changed without departing from the purpose of the present invention. Therefore, the scope of the present invention should not be interpreted restrictively by the embodiments shown below.

[0238] [Example 1]

[0239] First, referring to Synthesis Example 1 of International Publication No. 2019 / 131572, Monomer M-1 was synthesized.

[0240] [Chemical formula 8]

[0241]

[0242] Next, cyclohexanone (12.6 g) and 1-methoxy-2-propanol (12.6 g) were added to a 300 mL three-necked flask equipped with a stirring blade, a thermometer, a cooling tube, and a nitrogen inlet tube, and heated to 120° C. under a nitrogen stream. A mixed solution of monomer M-1 (3.75 g), acrylic acid (1.25 g), polymerization initiator V-601 (manufactured by FUJIFILM Wako PureChemical Corporation) (0.74 g), and cyclohexanone (25.2 g) was added dropwise to the obtained solution over 120 minutes. After aging for 1 hour, a mixed solution of polymerization initiator V-601 (0.8 g) and cyclohexanone (1.7 g) was further added and aged for 2 hours.

[0243] After the reaction was completed, the reaction solution was added dropwise to an excess of hexane, and the precipitated polymer was recovered and air-dried at 60°C to obtain a polymer (4.46 g). NaHCO3 (1.40 g) and pure water (40 mL) were added to the obtained polymer and then shaken to obtain a composition containing a light yellow transparent polymer A-1. Various NMR (Nuclear Magnetic Resonance) were used to confirm that the target product was obtained.

[0244] Next, a sunscreen cream (cosmetics) was prepared.

[0245] The various components shown in the following table were stirred at 70 to 80° C. for 30 minutes to prepare a uniform solution. The solution was cooled while further stirring, and the stirring was stopped when the temperature reached 30 to 35° C., and the solution was naturally cooled to obtain a cosmetic. In addition, the specific polymer was added so that the solid content would be the value shown in the table.

[0246] Polymer A-1

[0247] Emulsifier (NIKKOL NICOMULS 41, manufactured by Nikko Chemicals Co., Ltd.)

[0248] · Behenyl alcohol (NIKKOL BEHENYL ALCOHOL 65, manufactured by Nikko Chemicals Co., Ltd.)

[0249] Squalane (NIKKOL Squalane, manufactured by Nikko Chemicals Co., Ltd.)

[0250] · Glyceryl tri-2-ethylhexanoate (NIKKOL Trifat S-308, manufactured by Nikko Chemicals Co., Ltd.)

[0251] ·Methylparaben

[0252] 1,3-Butanediol (manufactured by Kyowa Chemical Industry Co., Ltd.)

[0253] Xanthan gum

[0254] Purified water

[0255] [Table 1]

[0256]

[0257] [Examples 2 to 15, Comparative Examples 1 to 3]

[0258] In the Examples and Comparative Examples other than Example 1, compositions containing each cosmetic were obtained by the same procedures as in Example 1, except that the polymers shown in the table were synthesized by referring to the synthesis method of the polymer in Example 1.

[0259] [evaluate]

[0260] [Water solubility of specific polymers (appearance of aqueous solution)]

[0261] Mix polymer and pure water, prepare the aqueous solution (aqueous composition) of 15 mass % by solid content concentration. The obtained aqueous solution is filled in a 30mL Nessler tube, after oscillation, and evaluated by visual observation according to the following evaluation criteria. In addition, 3 or more are judged to be no problem in use.

[0262] 4: No turbidity was observed at all.

[0263] 3: Slight turbidity was observed.

[0264] 2: Obvious turbidity was observed, but the dispersion was uniform.

[0265] 1: Obvious turbidity, separation or precipitation is observed.

[0266] 〔Wavelength 380nm shielding rate〕

[0267] Each cosmetic was applied to a PMMA plate (HELIOPLATE HD6) in a manner such that the thickness after drying was a thin film of 10 μm, thereby forming a coating film. The obtained coating film was subjected to a transmission spectrum measurement. Regarding the transmission spectrum, a UV-VIS spectrophotometer UV-2550 (manufactured by SHIMADZU CORPORATION) was used to measure the transmission spectrum at a wavelength of 380 nm, and the wavelength 380 nm shielding rate was evaluated as a difference from the case of only a PMMA plate (blank culture medium). In addition, an evaluation of 3 or more was judged to be no problem in use.

[0268] 5: The shielding rate at a wavelength of 380nm is more than 50%

[0269] 4: The shielding rate at a wavelength of 380nm is 40% or more and less than 50%

[0270] 3: The shielding rate at a wavelength of 380nm is 30% or more and less than 40%

[0271] 2: The shielding rate at a wavelength of 380nm is 20% or more and less than 30%

[0272] 1: The shielding rate at a wavelength of 380nm is less than 20%

[0273] 〔Viscosity of cosmetics〕

[0274] The viscosity of each cosmetic at 25° C. was measured using a BL type viscometer (VS-A type, manufactured by Shibaura Systems) under the conditions of rotor No. 4, 12 rpm, and 1 minute. Evaluations of 3 or higher were judged to be without problems in use.

[0275] 5: 14000~50000mPa·s

[0276] 4: 12000mPa·s or more and less than 14000mPa·s or more than 50000mPa·s and less than 200000mPa·s

[0277] 3: 10000mPa·s or more and less than 12000mPa·s or more than 200000mPa·s and less than 300000mPa·s

[0278] 2: 8000mPa·s or more and less than 10000mPa·s or more than 300000mPa·s and less than 350000mPa·s

[0279] 1: less than 8000 mPa·s or 350000 mPa·s or more The evaluation results are shown in the following table.

[0280] [Table 2]

[0281]

[0282] [Table 3]

[0283]

[0284] As shown in the table, it was confirmed that the polymer of the present invention has excellent ultraviolet shielding properties and the aqueous solution obtained when added to water also has excellent appearance.

[0285] It was confirmed that when the hydrophilic group contained in the repeating unit B was at least one group selected from the group consisting of a carboxylic acid group, a sulfonic acid group and salts thereof, the viscosity and the appearance of the aqueous solution were more excellent (Examples 1 to 9).

[0286] It was confirmed that when the total content of the repeating unit A and the repeating unit B in the specific polymer was 96 to 100% by mass relative to the total mass of the specific polymer, the viscosity and the appearance of the aqueous solution were more excellent (Examples 1 to 8 and 10).

[0287] It was confirmed that when the weight average molecular weight of the specific polymer was 1,000 to 50,000, the viscosity and the appearance of the aqueous solution were more excellent (Examples 1 to 8, 11, and 12).

[0288] It was confirmed that when the mass ratio of the content of repeating unit B to the content of repeating unit A in the specific polymer (content of repeating unit B / content of repeating unit A) was 0.1 to 3 (preferably 0.1 to 1.5), the ultraviolet shielding property and viscosity were more excellent (Examples 1 to 8, 13 and 14).

Claims

1. A polymer comprising a repeating unit A having a structure represented by formula (A1) and a repeating unit B having a hydrophilic group, In formula (A1), Y 11 or Y 12 one of the groups represents a cyano group, and the other represents a cyano group, an alkylcarbonyl group which may have a substituent, an arylcarbonyl group which may have a substituent, a heterocycliccarbonyl group which may have a substituent, an alkylsulfonyl group which may have a substituent, an arylsulfonyl group which may have a substituent, a carbamoyl group which may have a substituent, an aminosulfonyl group which may have a substituent, an alkoxycarbonyl group which may have a substituent, or an aryloxycarbonyl group which may have a substituent, V 11 Indicates *1-L V11 -*2, V 12 represents a hydrogen atom, a monovalent substituent, or *1-L V12 -*2, L V11 and L V12 Each independently represents a single bond or a divalent linking group, *1 represents the bonding position to the main chain of the polymer, and *2 represents the bonding position to the benzene ring indicated in formula (A1). R 11 and R 12 Each independently represents a hydrogen atom or a monovalent substituent.

2. The polymer according to claim 1, wherein The repeating unit A has a structure represented by formula (A2), In formula (A2), V 21 Indicates *1-L V21 -*2, V 22 represents a hydrogen atom, a monovalent substituent, or *1-L V22 -*2, L V21 and L V22 Each independently represents a single bond or a divalent linking group, *1 represents the bonding position to the main chain of the polymer, and *2 represents the bonding position to L indicated in formula (A2). a21 or L a22 The bonding position of L a21 and L a22 Each independently represents -O- or -CO-, R 21 and R 22 Each independently represents a hydrogen atom or a monovalent substituent.

3. The polymer according to claim 1 or 2, wherein The repeating unit A and the repeating unit B include repeating units derived from a monomer having at least one polymerizable group selected from the group consisting of a (meth)acrylic acid group, a styryl group, a (meth)acrylamide group, and a vinyl ether group.

4. The polymer according to claim 1 or 2, wherein The repeating unit A has a structure represented by formula (A3), In formula (A3), V 31 represents a hydrogen atom, a monovalent substituent, or *1-L V31 -*2, L V31 represents a single bond or a divalent linking group, *1 represents the bonding position to the main chain of the polymer, and *2 represents the bonding position to L explicitly indicated in formula (A3). a31 The bonding position of L a31 and L a32 Each independently represents -O- or -CO-, R 31 and R 32 Each independently represents a hydrogen atom or a monovalent substituent, and R 33 represents a hydrogen atom or a methyl group, X 1 represents phenylene, -COO-, -CONH-, -O-, -CO- or -CH2-, X 2 It represents a single bond or a divalent linking group.

5. The polymer according to claim 1 or 2, wherein The hydrophilic group contained in the repeating unit B is at least one group selected from the group consisting of a carboxylic acid group, a sulfonic acid group, and salts thereof.

6. The polymer according to claim 1 or 2, wherein The repeating unit B has a repeating unit derived from at least one monomer selected from the group consisting of (meth)acrylic acid, itaconic acid, β-carboxyethyl (meth)acrylate, 2-(meth)acrylamide-2-methylpropanesulfonic acid, 3-sulfopropyl (meth)acrylate, and salts thereof.

7. A composition comprising the polymer according to claim 1 or 2 and water.

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