JPWO2014087644A1 - Method for producing polymer - Google Patents

Abstract

A new method for producing a (meth) acrylic acid ester-based polymer having a highly sterically hindered secondary amino group or a highly sterically hindered haloamino group. A method is desired. A specific (meth) acrylic acid ester monomer having a sterically hindered secondary amino group or a highly sterically hindered haloamino group can be polymerized by a living anion polymerization method without protecting the secondary amine, and the present invention. According to this production method, a (meth) acrylic acid ester polymer having a narrow molecular weight distribution can be obtained.

Description

The present invention relates to a production method for polymerizing a (meth) acrylic acid ester having a sterically hindered secondary amino group or a sterically hindered haloamino group by a living anion polymerization method, and a polymer obtained by the production method.
This application claims priority with respect to the Japan patent application 2012-268461 for which it applied on December 7, 2012, and uses the content here.

  It is known that the light stability of a polymer can be improved by introducing a highly sterically hindered secondary amine such as a hindered amine into the side chain of the polymer. For example, Patent Document 1 proposes a polyether containing a sterically hindered amine side chain. In paragraph 0128 of Patent Document 1, 2,2,6,6-tetramethyl-4- (2,3-epoxypropoxy) piperidine is subjected to anionic polymerization using potassium tert-butoxide and 18-crown-6. A polyether (1) containing a highly sterically hindered secondary amine side chain is produced.

  A polymer having a highly sterically hindered secondary amine such as a hindered amine is also useful as an intermediate for obtaining a polymer containing a nitroxide structure. For example, in Patent Document 2, a repeating unit represented by the following formula (2) is obtained by radical polymerization of 2,2,6,6-tetramethyl-4-piperidinyl methacrylate in the presence of a crosslinking agent. A (meth) acrylic acid imino polymer is obtained.

  However, a production method for polymerizing a highly sterically hindered secondary amine such as a hindered amine or a (meth) acrylic acid ester having a highly sterically hindered haloamino group by a living anion polymerization method has not been known.

JP-A-7-70309 JP 2012-193273 A

  A new method for producing a (meth) acrylic acid ester polymer having a highly sterically hindered secondary amine or a highly sterically hindered haloamino group has been desired. In particular, there has been a demand for a simple production method that does not require the secondary amine to be protected with a protecting group.

  As a result of intensive studies to solve the above problems, the present inventors have found that a specific (meth) acrylic acid ester monomer having a sterically hindered secondary amine does not protect the secondary amine, It was found that polymerization can be performed by a living anionic polymerization method. Moreover, it discovered that the specific (meth) acrylic acid ester monomer which has a sterically hindered haloamino group can be superposed | polymerized by the living anion polymerization method.

That is, the present invention
(1) By the living anionic polymerization method using a polymerization initiator, the formula [I]

^{(Wherein, R 1, R 2, R} 3, and ^{R 4} each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms. ^{However, R 1, R 2, R} 3, and ^{R 4} Among them, at least two are alkyl groups having 1 to 6 carbon atoms, and the alkyl groups having 1 to 6 carbon atoms may be the same or different from each other, and are bonded to each other to form a ring. R represents an alkyl group having 1 to 6 carbon atoms, m represents 0 or 1, R ¹¹ represents a hydrogen atom or a methyl group, X represents a divalent linking group, and n represents Represents 0 or 1. Z represents a hydrogen atom or a halogen atom.) Or the formula [II]

^{(Wherein, R 5, R 6, R} 7, R 8, and ^{R 9} each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms. ^{However, R 5, R 6, R} 7, R ⁸ and R ⁹ are at least three alkyl groups having 1 to 6 carbon atoms, and the alkyl groups having 1 to 6 carbon atoms may be the same or different from each other, and may be bonded to each other. (R ¹² represents a hydrogen atom or a methyl group, Y represents a divalent linking group, and Q represents a hydrogen atom or a halogen atom.)
A method for producing a polymer, characterized by polymerizing a (meth) acrylic acid ester represented by

（式中、Ｒ^１、Ｒ^２、Ｒ^３、Ｒ^４、Ｒ^１１、ｎ、Ｘ、ｒ、ｍ及びＺは前記と同じである。）
で表される繰り返し単位を含み、分子量分布が１．００〜１．５０であることを特徴とする重合体(2) Formula [III]

(Wherein R ¹ , R ² , R ³ , R ⁴ , R ¹¹ , n, X, r, m and Z are the same as above).
And a polymer having a molecular weight distribution of 1.00 to 1.50.

（式中、Ｒ^５、Ｒ^６、Ｒ^７、Ｒ^８、Ｒ^９、Ｒ^１２、Ｙ、及びＱは前記と同じである。）
で表される繰り返し単位を含み、分子量分布が１．００〜１．５０であることを特徴とする重合体に関する。(3) Formula [IV]

(In the formula, R ⁵ , R ⁶ , R ⁷ , R ⁸ , R ⁹ , R ¹² , Y, and Q are the same as described above.)
And a polymer having a molecular weight distribution of 1.00 to 1.50.

  A new method for producing a polymer having a sterically hindered secondary amino group or a sterically hindered haloamino group in the side chain is provided. In the production method of the present invention, living anion polymerization can be performed using a (meth) acrylic acid ester having a specific sterically hindered secondary amino group or sterically hindered haloamino group. Moreover, according to the production method of the present invention, a polymer having a narrow molecular weight distribution can be obtained.

((Meth) acrylic acid ester)
The (meth) acrylic acid ester used in the present invention is represented by the formula [I] or the formula [II].

Formula [I]

In the formula [I], R ¹ , R ² , R ³ , and R ⁴ each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.

Examples of the alkyl group having 1 to 6 carbon atoms in R ¹ , R ² , R ³ , and R ⁴ include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an s-butyl group, t- A butyl group, an isobutyl group, a hexyl group, etc. are mentioned. Among these, a C1-C3 alkyl group is preferable and a methyl group or an ethyl group is more preferable.

Of R ¹ , R ² , R ³ , and R ⁴ , at least two are alkyl groups having 1 to 6 carbon atoms. Moreover, it is more preferable that at least three are alkyl groups having 1 to 6 carbon atoms, and it is more preferable that all four are alkyl groups having 1 to 6 carbon atoms.

The alkyl groups having 1 to 6 carbon atoms of R ¹ , R ² , R ³ , and R ⁴ may be the same or different, but are preferably the same, and R ¹ , R ² , R More preferably, ³ and R ⁴ are methyl groups.

The alkyl groups having 1 to 6 carbon atoms of R ¹ , R ² , R ³ , and R ⁴ may be bonded to each other to form a ring. Either R ¹ , R ² and R ³ , R ⁴ may be bonded to each other to form a crosslinked structure, R ¹ and R ² may be bonded to each other, or R ³ and R 2 ⁴ may be bonded to each other to form a spiro ring structure.

  In the formula [I], r represents an alkyl group having 1 to 6 carbon atoms, and m represents 0 or 1.

The alkyl group having 1 to 6 carbon atoms in the ^{r, R 1, R 2,} R 3, and may be the same as the alkyl group having 1 to 6 carbon atoms in ^{R 4.}

In the formula [I], R ¹¹ represents a hydrogen atom or a methyl group, and a methyl group is preferable.

  In formula [I], X represents a divalent linking group. The divalent linking group is not particularly limited as long as it does not inhibit living anion polymerization, but is preferably a single bond, an alkylene group having 1 to 6 carbon atoms, or an alkyleneoxy group having 2 to 6 carbon atoms. A bond and an alkyleneoxy group having 1 to 6 carbon atoms are more preferable, and a single bond is particularly preferable.

  Examples of the alkylene group having 1 to 6 carbon atoms include methylene, ethylene, propylene, methylethylene, butylene, 1,2-dimethylethylene, pentylene, 1-methylbutylene and 2-methylbutylene.

  Examples of the alkyleneoxy group having 2 to 6 carbon atoms include ethyleneoxy group, 1,2-propyleneoxy group, 1,3-propyleneoxy group, 1,2-butyleneoxy group, 1,4-butyleneoxy group, and 1, Examples include 6-hexyleneoxy group.

  In the formula [I], n represents 0 or 1.

  In formula [I], Z represents a hydrogen atom or a halogen atom.

  Specific examples of the compound represented by the formula [I] include compounds represented by Table 1.

Formula [II]

In the formula [II], R ⁵ , R ⁶ , R ⁷ , R ⁸ and R ⁹ each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.

The ^{R 5, R 6, R 7} , R 8, and an alkyl group having 1 to 6 carbon atoms in ^{R 9,} may be mentioned the same alkyl groups having 1 to 6 carbon atoms in the formula [I].

Of R ⁵ , R ⁶ , R ⁷ , R ⁸ , and R ⁹ , at least three are preferably alkyl groups having 1 to 6 carbon atoms.

The alkyl groups having 1 to 6 carbon atoms of R ⁵ , R ⁶ , R ⁷ , R ⁸ and R ⁹ may be the same or different from each other, but are preferably the same.

The alkyl groups having 1 to 6 carbon atoms of R ⁵ , R ⁶ , R ⁷ , R ⁸ , and R ⁹ may be bonded to each other to form a ring.

In the formula [II], R ¹² represents a hydrogen atom or a methyl group, preferably a methyl group.

  In formula [II], Y represents a divalent linking group. Although it will not specifically limit if it is a structure which does not inhibit living anion polymerization as a bivalent coupling group, A C1-C6 alkylene group is preferable and an ethylene group and a propylene group are more preferable.

  Examples of the alkylene group having 1 to 6 carbon atoms include those similar to the alkylene group having 1 to 6 carbon atoms in the formula [I].

  In formula [II], Q represents a hydrogen atom or a halogen atom.

  Specific examples of the compound represented by the formula [II] include compounds represented by Table 2.

(Living anion polymerization method)
The production method of the present invention is a method in which a (meth) acrylic acid ester represented by the formula [I] or the formula [II] is subjected to living anion polymerization using a polymerization initiator. In the production method of the present invention, only the (meth) acrylic acid ester represented by the formula [I] may be polymerized, or only the (meth) acrylic acid ester represented by the formula [II] may be polymerized. The (meth) acrylic acid ester represented by the formula [I] and the (meth) acrylic acid ester represented by the formula ([II]) may be copolymerized. Alternatively, the (meth) acrylate represented by the formula [II] may be copolymerized with another monomer, and the (meth) acrylate represented by the formula [I] and the formula [II] In each case, one or a mixture of two or more can be used.

(Polymerization initiator)
As the polymerization initiator used in the production method of the present invention, a known living anionic polymerization initiator can be used.
The living anion polymerization initiator is not particularly limited as long as it is a nucleophile and has a function of initiating polymerization of the living anion polymerizable monomer.

Specifically, alkali metals such as metallic lithium, metallic sodium, metallic potassium, metallic cesium; methyllithium, ethyllithium, n-butyllithium, sec-butyllithium, t-butyllithium, ethylsodium, lithium biphenyl, lithium naphthalene Organic alkali metals such as lithium triphenyl, sodium naphthalene, α-methylstyrene sodium dianion, 1,1-diphenylhexyl lithium, 1,1-diphenyl-3-methylpentyl lithium, lithium diisopropylamide; methyl magnesium bromide, ethyl magnesium And organic alkaline earth metals such as bromide and phenylmagnesium bromide. Of these, organic alkali metals are preferable, organic lithium is more preferable, and n-butyl lithium and lithium diisopropylamide are particularly preferable.
These living anionic polymerization initiators can be used alone or in combination of two or more.

  The usage-amount of a living anion polymerization initiator is 0.001-0.2 equivalent normally with respect to the monomer to be used, Preferably it is 0.005-0.1 equivalent. By using a living anionic polymerization initiator in this range, the target polymer can be produced with high yield.

(Conditions for living anionic polymerization)
The polymerization temperature in the present invention is not particularly limited as long as it does not cause side reactions such as transfer reaction and termination reaction, and the monomer is consumed and the polymerization is completed, but it is carried out in a temperature range of −100 ° C. to 0 ° C. Is preferred. More preferably, it is carried out in a temperature range of −80 ° C. to −30 ° C.

  The living anionic polymerization reaction can be performed in a suitable polymerization solvent. The polymerization solvent to be used is not particularly limited as long as it does not participate in the polymerization reaction and is compatible with the polymer.

  Specifically, aliphatic hydrocarbons such as n-hexane and n-heptane, alicyclic hydrocarbons such as cyclohexane and cyclopentane, aromatic hydrocarbons such as benzene and toluene, diethyl ether, tetrahydrofuran (THF) ), Ethers such as dioxane, and organic solvents usually used in living anionic polymerization such as anisole and hexamethylphosphoramide can be used, and these can be used as a single solvent or a mixed solvent of two or more. can do.

  The amount of the solvent used is not particularly limited, but is an amount such that the concentration of the anionic polymerizable monomer with respect to the polymerization solvent is usually in the range of 1 to 40% by weight, preferably in the range of 10 to 30% by weight. .

(Other monomers)
The other monomer that can be used in the present invention is not particularly limited as long as it has a living anion polymerizable unsaturated bond. Specifically, styrene and its derivatives, butadiene and its derivatives, and formula (I ) Or (meth) acrylic acid ester derivatives other than the (meth) acrylic acid ester represented by the formula (II).

  Specific examples of styrene and derivatives thereof include styrene, α-alkylstyrene, and styrene having a nuclear substituent.

  The nuclear substituent is not particularly limited as long as it is an inactive group with respect to an anionic species having a polymerization initiating ability and an anionic species having no ability to initiate polymerization. Specific examples include an alkyl group, an alkoxyalkyl group, an alkoxy group, an alkoxyalkoxy group, a t-butoxycarbonyl group, a t-butoxycarbonylmethyl group, a tetrahydropyranyl group, and the like.

  Specific examples of α-alkyl styrene and styrene having a nuclear substituent include α-methyl styrene, α-methyl-p-methyl styrene, p-methyl styrene, m-methyl styrene, o-methyl styrene, p-ethyl styrene. 2,4-dimethylstyrene, 2,5-dimethylstyrene, p-isopropylstyrene, 2,4,6-triisopropylstyrene, pt-butoxystyrene, pt-butoxy-α-methylstyrene, m- Examples include t-butoxystyrene.

  Examples of butadiene and its derivatives include 1,3-butadiene, isoprene, 2,3-dimethylbutadiene, 2-ethyl-1,3-butadiene, 1,3-pentadiene and the like.

  The (meth) acrylic acid ester derivative other than the (meth) acrylic acid ester represented by the formula (I) or the formula (II) has an alcohol residue of 1 to 20 carbon atoms from the viewpoint of reactivity. preferable. Examples of such (meth) acrylic acid ester derivatives include methyl ester, ethyl ester, isopropyl ester, n-butyl ester and the like.

  These other monomers can be used alone or in combination of two or more. The production method of the present invention can also be applied to the production of copolymers such as block copolymers and random copolymers.

(Other)
In the present invention, if necessary, an additive can be added at the start of polymerization or during polymerization. Specific examples of such additives include mineral salts and halides such as sodium, potassium, barium, and magnesium sulfates, nitrates, and borates. Examples include barium chloride, bromide, iodide, lithium borate, magnesium nitrate, sodium chloride, potassium chloride, and the like. Among these, lithium halides such as lithium chloride, lithium bromide, iodine Preference is given to using lithium fluoride or lithium fluoride, in particular lithium chloride.

(Polymer)
The polymer of the present invention is not particularly limited as long as it contains a repeating unit represented by formula [III] or formula [IV].

The polymer of the present invention can be produced by polymerizing the (meth) acrylic acid ester represented by the formula [I] or the formula [II] by a living anion polymerization method using a polymerization initiator. .
In addition, when Z or Q of the repeating unit represented by the formula [III] or the formula [IV] is a halogen atom, the formula [I] or the formula [II] in which Z or Q is a halogen atom The (meth) acrylic acid ester represented can be polymerized, but after polymerizing the (meth) acrylic acid ester represented by the formula [I] or the formula [II] wherein Z or Q is a hydrogen atom, The N atom may be halogenated with a halogenating agent.

  Specific examples of halogenating agents include halogens such as chlorine, bromine, iodine and fluorine, sodium dihaloisocyanurate, sodium hypohalite, N-halosuccinimide, 1,3-dihalohydantoin and hypohalous acid. Calcium etc. can be mentioned.

In the formula [III], R ¹ , R ² , R ³ , R ⁴ , R ¹¹ , n, X, r, m and Z are the same as described above.
In formula [IV], R ⁵ , R ⁶ , R ⁷ , R ⁸ , R ⁹ , R ¹² , Y, and Q are the same as described above.

  The polymer of the present invention includes a homopolymer obtained by polymerizing a (meth) acrylic acid ester represented by the formula [I], a homopolymer obtained by polymerizing a (meth) acrylic acid ester represented by the formula [II], and a formula [I A copolymer obtained by copolymerizing a (meth) acrylic acid ester represented by the formula (II) and a (meth) acrylic acid ester represented by the formula [II], and the formula [I] and / or the formula [II] ( It includes a copolymer obtained by copolymerizing a (meth) acrylate monomer with another monomer.

  The number average molecular weight (Mn) measured using GPC (Gel Permeation Chromatography: mobile phase DMF or THF, PMMA standard) of the polymer of the present invention is not particularly limited, but is preferably 1,000 to 50,000. More preferably, it is 1,500 to 20,000, and particularly preferably 2,000 to 10,000. Furthermore, the molecular weight distribution (Mw / Mn), which is the ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn), is not particularly limited, but is preferably 1.00 to 1.50, preferably 1.00 It is more preferably 1.40, and particularly preferably 1.00 to 1.35.

  EXAMPLES Hereinafter, although this invention is demonstrated in detail using an Example, the technical scope of this invention is not limited to these illustrations.

Example 1
To a 200 mL flask, 98.9 g of THF and 0.1 g of lithium chloride were added and cooled to −60 ° C. 2.0 g of n-butyllithium (15.4 wt% hexane solution) and then 0.6 g of diisopropylamine were added and stirred for 10 minutes. 43.7 g (47.0% THF solution) of 2,2,6,6-tetramethyl-4-piperidyl methacrylate (hereinafter abbreviated as TMPMA) dissolved in THF was added dropwise over 30 minutes and stirred for 15 minutes. . A part was sampled, and after confirming the disappearance of the monomer by GC measurement, 0.8 g of methanol was added to stop the reaction.
The obtained polymer was analyzed by GPC (mobile phase DMF, PMMA standard), and it was confirmed that the molecular weight (Mn) was 3,920 and the molecular weight distribution (Mw / Mn) was 1.15.

(Example 2)
To a 200 mL flask, 105.6 g of THF and 0.1 g of lithium chloride were added, and cooled to −60 ° C. 2.0 g of n-butyllithium (15.4 wt% hexane solution) and then 1.0 g of diphenylethylene were added and stirred for 30 minutes. TMPMA 38.3g (53.3% THF solution) melt | dissolved in THF was dripped over 30 minutes, and it stirred for 15 minutes. A part was sampled, and after confirming the disappearance of the monomer by GC measurement, 0.8 g of methanol was added to stop the reaction.
The obtained polymer was analyzed by GPC (mobile phase DMF, PMMA standard), and it was confirmed that the molecular weight (Mn) was 4,920 and the molecular weight distribution (Mw / Mn) was 1.13.

(Example 3)
To a 300 mL flask, THF 113.8 g and lithium chloride 0.2 g were added and cooled to -60 ° C. After adding 4.0 g of n-butyllithium (15.4 wt% hexane solution) and then 0.9 g of diisopropylamine, the mixture was stirred for 30 minutes. 14.7 g of 2- (t-butylamino) ethyl methacrylate was added dropwise over 30 minutes and stirred for 15 minutes. A part was sampled, and after confirming disappearance of the monomer by GC measurement, 0.7 g of methanol was added to stop the reaction.
The obtained polymer was analyzed by GPC (mobile phase DMF, PMMA standard), and it was confirmed that the molecular weight (Mn) was 1,840 and the molecular weight distribution (Mw / Mn) was 1.31.

(Comparative Example 1)
Polymerization was carried out in the same manner as in Example 3 using 4-piperidyl methacrylate as the monomer, but the polymerization did not proceed.

Example 4
A 200 mL flask was charged with 104.33 g of THF and 0.17 g of lithium chloride. After cooling to −60 ° C., 3.37 g of n-butyllithium (15.4 wt% hexane solution) and 0.81 g of diisopropylamine were charged. Stir for minutes. Next, 0.87 g of methyl isobutyrate was charged and stirred for 15 minutes. 15.38 g of TMPMA and 15.38 g of allyl methacrylate dissolved in 28.92 g of THF were added dropwise over 40 minutes and aged for 15 minutes. A part was sampled, and after confirming disappearance of the monomer by GC measurement, 1.2 g of methanol was added to stop the reaction.
The obtained copolymer was analyzed by GPC (mobile phase THF, PMMA standard), and it was confirmed that the molecular weight (Mn) was 3,860 and the molecular weight distribution (Mw / Mn) was 1.11.

1.25 times as much water as the monomer and 1/9 amount of ethyl acetate in THF were added to separate the layers. Chlorination reaction was performed by adding 76.3 g of sodium hypochlorite solution and aging for 1 hour at room temperature. After liquid separation, the organic layer was washed with water three times. The organic layer was concentrated, adjusted to a 30% THF solution, and reprecipitated with a large amount of water. The obtained copolymer was vacuum-dried to obtain 32.76 g of white powder.
The obtained polymer was analyzed by GPC (mobile phase THF, PMMA standard), and it was confirmed that the molecular weight (Mn) was 4,850 and the molecular weight distribution (Mw / Mn) was 1.11.
From the ICP-AES analysis, the chlorine concentration in the copolymer was 6.8% (theoretical value: 7.3%).

(Example 5)
90.30 g of THF and 0.16 g of lithium chloride were added to a 200 mL flask and cooled to −60 ° C. n-Butyllithium 3.25g (15.4 wt% concentration hexane solution) and diisopropylamine 0.83g were charged and stirred for 15 minutes. Next, 0.84 g of methyl isobutyrate was charged and stirred for 15 minutes. 15.21 g of TMPMA and 15.21 g of glycidyl methacrylate dissolved in 28.26 g of THF were added dropwise over 40 minutes and aged for 15 minutes. A part was sampled, and after confirming disappearance of the monomer by GC measurement, 1.2 g of methanol was added to stop the reaction.
The obtained copolymer was analyzed by GPC (mobile phase THF, PMMA standard), and it was confirmed that the molecular weight (Mn) was 3,410 and the molecular weight distribution (Mw / Mn) was 1.24.

1.25 times as much water as the monomer and 1/9 amount of ethyl acetate in THF were added to separate the layers. Chlorination reaction was performed by adding 60.2 g of sodium hypochlorite solution and aging for 1 hour at room temperature. After liquid separation, the organic layer was washed with water three times. The organic layer was concentrated, adjusted to a 30% THF solution, and reprecipitated with a large amount of water. The obtained copolymer was vacuum-dried to obtain 32.11 g of a white powder.
The obtained copolymer was analyzed by GPC (mobile phase THF, PMMA standard), and it was confirmed that the molecular weight (Mn) was 5,180 and the molecular weight distribution (Mw / Mn) was 1.33.
From the ICP-AES analysis, the chlorine concentration in the copolymer was 7.7% (theoretical value: 7.3%).

(Example 6)
A 200 mL flask was charged with 97.23 g of THF and 0.34 g of lithium chloride, cooled to −60 ° C., and then charged with 4.8 mL of n-butyllithium (15.4 wt% hexane solution) and 0.80 g of diisopropylamine, 15 Stir for minutes. Next, 0.82 g of methyl isobutyrate was charged and stirred for 15 minutes. 9.24 g of N-chloro-2,2,6,6-tetramethyl-4-piperidine methacrylate and 16.78 g of 1-ethoxyethyl methacrylate dissolved in 9.24 g of THF were added dropwise over 30 minutes and aged for 45 minutes. did. A part was sampled and the disappearance of the monomer was confirmed by GC measurement. Then, 1.21 g of methanol and 0.37 g of acetic acid were added to stop the reaction.
The obtained polymer was analyzed by GPC (mobile phase THF, PMMA standard), and it was confirmed that the molecular weight (Mn) was 3,720 and the molecular weight distribution (Mw / Mn) was 1.14.

A half amount of THF in ethyl acetate and the same weight of water were added to separate the layers. The organic layer was concentrated, adjusted to a 30% THF solution, methanol and 1 mol / L hydrochloric acid having the same weight as the monomer were added, and the mixture was stirred at room temperature for 3 hours. Ethyl acetate (370 g) and water (100 g) were added and the layers were separated. The aqueous layer was concentrated and then dropped into a large amount of acetone to precipitate as a precipitate. The obtained precipitate was vacuum-dried to obtain 8.9 g of a white powder.
From the ICP-AES analysis, the chlorine concentration in the copolymer was 4.8% (theoretical value: 5.6%).

(Example 7)
75.30 g of THF and 0.11 g of lithium chloride were added to a 200 mL flask and cooled to −60 ° C. 2.03 g of n-butyllithium (15.4 wt% hexane solution) and then 0.63 g of diisopropylamine were added and stirred for 10 minutes. 12.24 g of TMPMA dissolved in THF (50% THF solution) was added dropwise over 15 minutes and stirred for 20 minutes. A part was sampled and monomer disappearance was confirmed by GC measurement. The obtained polymer was analyzed by GPC (mobile phase DMF, PMMA standard), and it was confirmed that the molecular weight (Mn) was 2340 and the molecular weight distribution (Mw / Mn) was 1.17.
Next, 7.75 g of glycidyl methacrylate (hereinafter abbreviated as GMA) was added dropwise over 10 minutes and stirred for 15 minutes. A part was sampled, and after confirming the disappearance of the monomer by GC measurement, 0.8 g of methanol was added to stop the reaction. The obtained copolymer was analyzed by GPC (mobile phase DMF, PMMA standard), and it was confirmed that the molecular weight (Mn) was 4,340 and the molecular weight distribution (Mw / Mn) was 1.19.

1.25 times as much water as the monomer and 1/9 amount of ethyl acetate in THF were added to separate the layers. Chlorination reaction was performed by adding 48.5 g of sodium hypochlorite solution and aging for 1 hour at room temperature. After liquid separation, the organic layer was washed with water three times. The organic layer was concentrated, adjusted to a 30% THF solution, and reprecipitated with a large amount of methanol. The obtained copolymer was vacuum-dried to obtain 20.85 g of a white powder.
The obtained copolymer was analyzed by GPC (mobile phase DMF, PMMA standard), and it was confirmed that the molecular weight (Mn) was 5,520 and the molecular weight distribution (Mw / Mn) was 1.20.
From the ICP-AES analysis, the chlorine concentration in the copolymer was 9.0% (theoretical value: 8.8%).

(Example 8)
A 200 mL flask was charged with 89.37 g of THF and 0.14 g of lithium chloride. After cooling to −60 ° C., 2.05 g of n-butyllithium (15.4 wt% hexane solution) and 0.60 g of diisopropylamine were charged. Stir for minutes. Next, 0.55 g of methyl isobutyrate was charged and stirred for 15 minutes. 9.53 g of N-chloro-2,2,6,6-tetramethyl-4-piperidine methacrylate and 9.53 g of allyl methacrylate dissolved in 5.82 g of THF were added dropwise over 15 minutes and aged for 30 minutes. A part was sampled, and after confirming the disappearance of the monomer by GC measurement, 0.8 g of methanol was added to stop the reaction.
The obtained polymer was analyzed by GPC (mobile phase THF, PMMA standard), and it was confirmed that the molecular weight (Mn) was 4,760 and the molecular weight distribution (Mw / Mn) was 1.22.

1.25 times as much water as the monomer and 1/9 amount of ethyl acetate in THF were added to separate the layers. The organic layer was concentrated, adjusted to a 30% THF solution, and reprecipitated with a large amount of water. The obtained polymer was vacuum-dried to obtain 18.88 g of a white powder.
From the ICP-AES analysis, the chlorine concentration in the copolymer was 6.6% (theoretical value: 6.8%).

Claims (3)

By the living anionic polymerization method using a polymerization initiator, the formula [I]

^{(Wherein, R 1, R 2, R} 3, and ^{R 4} each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms. ^{However, R 1, R 2, R} 3, and ^{R 4} Among them, at least two are alkyl groups having 1 to 6 carbon atoms, and the alkyl groups having 1 to 6 carbon atoms may be the same or different from each other, and are bonded to each other to form a ring. R represents an alkyl group having 1 to 6 carbon atoms, m represents 0 or 1, R ¹¹ represents a hydrogen atom or a methyl group, X represents a divalent linking group, and n represents Represents 0 or 1. Z represents a hydrogen atom or a halogen atom.) Or the formula [II]

^{(Wherein, R 5, R 6, R} 7, R 8, and ^{R 9} each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms. ^{However, R 5, R 6, R} 7, R ⁸ and R ⁹ are at least three alkyl groups having 1 to 6 carbon atoms, and the alkyl groups having 1 to 6 carbon atoms may be the same or different from each other, and may be bonded to each other. (R ¹² represents a hydrogen atom or a methyl group, Y represents a divalent linking group, and Q represents a hydrogen atom or a halogen atom.)
A method for producing a polymer, characterized by polymerizing a (meth) acrylic acid ester represented by the formula: Formula [III]

(Wherein R ¹ , R ² , R ³ , R ⁴ , R ¹¹ , n, X, r, m and Z are the same as above).
The polymer characterized by having a molecular weight distribution of 1.00 to 1.50. Formula [IV]

(In the formula, R ⁵ , R ⁶ , R ⁷ , R ⁸ , R ⁹ , R ¹² , Y, and Q are the same as described above.)
The polymer characterized by having a molecular weight distribution of 1.00 to 1.50.