JP2005171028A - Dispersant containing ultraviolet-absorbing copolymer - Google Patents

Dispersant containing ultraviolet-absorbing copolymer Download PDF

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JP2005171028A
JP2005171028A JP2003410725A JP2003410725A JP2005171028A JP 2005171028 A JP2005171028 A JP 2005171028A JP 2003410725 A JP2003410725 A JP 2003410725A JP 2003410725 A JP2003410725 A JP 2003410725A JP 2005171028 A JP2005171028 A JP 2005171028A
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unsaturated monomer
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Takanori Matsuyama
貴則 松山
Nobuya Morishita
暢也 森下
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Kyoeisha Chemical Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a dispersant which is added to a curable dispersion composition to improve the dispersibility of the composition and imparts glossiness and weather resistance to a coating film or molded resin formed from the composition without causing a chalking phenomenon. <P>SOLUTION: This dispersant contains a UV-absorbing copolymer which has carboxyl groups and a weight-average mol. wt. of 500 to 100,000 and is prepared by copolymerizing 0.01 to 70 wt. % of a UV-absorbing group-containing unsaturated monomer with another unsaturated monomer. The UV-absorbing group-containing unsaturated monomer is a polymerizable benzotriazole compound, a polymerizable triazine compound or a polymerizable benzophenone compound. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、被膜を形成させる塗料組成物中や成形樹脂を形成する樹脂原料組成物中に顔料や微粉末鉱物等を分散させ、塗膜や成形樹脂に耐候性を付与する分散剤に関するものである。   The present invention relates to a dispersant for dispersing a pigment, fine powder mineral, or the like in a coating composition for forming a coating film or a resin raw material composition for forming a molding resin, and imparting weather resistance to the coating film or the molding resin. is there.

塗料組成物や樹脂原料組成物等には、種々の色彩の顔料や微粉末鉱物、塗膜形成樹脂、溶媒が含まれている。顔料や微粉末鉱物が十分に分散されていないと、塗料等の貯蔵時に顔料や微粉末鉱物が凝集や沈降を引き起こし、又、塗料被膜や樹脂成形品にした際には、光沢の低下、色分かれや色浮き等の問題が生じたりする。そこで、塗料等の樹脂組成物には顔料分散剤が使用されている。顔料の分散を均一にする手段のひとつとして、重合物を添加する方法が知られている。例えば、特許文献1にはアミノ基含有ウレタン化合物を添加する方法、特許文献2にはアクリル系重合物とイソシアネート等との変性物を添加する方法、特許文献3にはリン酸エステル誘導体を添加する方法、特許文献4にはビニル系共重合物を添加する方法が記載されている。   The paint composition, the resin raw material composition, and the like include pigments of various colors, fine powder minerals, coating film forming resins, and solvents. If the pigment and fine powder mineral are not sufficiently dispersed, the pigment and fine powder mineral will cause aggregation and sedimentation when the paint is stored. Problems such as separation and color floating may occur. Therefore, pigment dispersants are used in resin compositions such as paints. As one of means for making the pigment dispersion uniform, a method of adding a polymer is known. For example, Patent Document 1 adds an amino group-containing urethane compound, Patent Document 2 adds a modified product of an acrylic polymer and isocyanate, and Patent Document 3 adds a phosphate ester derivative. Method, Patent Document 4 describes a method of adding a vinyl copolymer.

しかし、光触媒活性を持つ顔料や微粉末鉱物が塗料等の樹脂組成物に使用されている場合、これらの分散剤では耐候性を維持できず、光沢の低下やチョーキング等の問題がしばしば見うけられる。またこれらの現象を抑制する手法として顔料や微粉末鉱物は光触媒活性を抑制するコーティングなどの処理がほどこされているが、未だ十分ではなく、これらの手法では耐候性を維持できず、光沢の低下やチョーキング等の問題がしばしば見うけられる。   However, when pigments or fine powder minerals having photocatalytic activity are used in resin compositions such as paints, these dispersants cannot maintain the weather resistance, and problems such as reduction in gloss and choking are often seen. . In addition, pigments and fine powder minerals have been treated with a coating that suppresses photocatalytic activity as a method to suppress these phenomena, but they are still not sufficient, and these methods cannot maintain weather resistance and reduce gloss. There are often problems such as choking.

特開平1−139132号公報JP-A-1-139132 特開昭63−51487号公報JP-A-63-51487 特開昭63−51469号公報JP-A-63-51469 特開平8−89779号公報Japanese Patent Laid-Open No. 8-89797

従来の分散剤を含む組成物は樹脂組成物中に光触媒活性を有した顔料が含まれていると、それを硬化させて塗膜や成形樹脂を形成させたときに、光触媒作用によって塗膜等が白化するチョーキングを引起したりして耐候性が不十分であった。   A composition containing a conventional dispersant contains a pigment having a photocatalytic activity in a resin composition, and when it is cured to form a coating film or a molded resin, a coating film or the like is formed by a photocatalytic action. Insufficient weather resistance caused whitening choking.

本発明は前記の課題を解決するためになされたもので、塗料組成物や樹脂原料組成物等に添加して分散性を向上させ、この組成物で形成した塗膜や成形樹脂にチョーキングを引起させず光沢を維持し耐候性を付与する分散剤を提供することを目的とする。   The present invention has been made to solve the above-mentioned problems, and is added to a coating composition, a resin raw material composition, etc. to improve dispersibility, and induces choking in a coating film or molded resin formed from this composition. An object of the present invention is to provide a dispersant that maintains gloss and imparts weather resistance.

前記の目的を達成するためになされた本発明のカルボキシル基を有する紫外線吸収性共重合物は、紫外線吸収性基含有不飽和単量体0.01〜70重量%と別な不飽和単量体とが共重合した重量平均分子量500〜100000のものである。   The ultraviolet-absorbing copolymer having a carboxyl group according to the present invention, which has been made to achieve the above object, is an unsaturated monomer different from 0.01 to 70% by weight of an ultraviolet-absorbing group-containing unsaturated monomer. And a copolymer having a weight average molecular weight of 500 to 100,000.

本発明の分散剤は、この紫外線吸収性共重合物を含有している。この分散剤は、例えば顔料および/または微粉末鉱物を分散させるものである。   The dispersant of the present invention contains this ultraviolet absorbing copolymer. This dispersing agent is for dispersing pigments and / or fine powder minerals, for example.

紫外線吸収性基含有不飽和単量体は、例えば重合性ベンゾトリアゾール化合物、重合性トリアジン化合物、重合性ベンゾフェノン化合物である。紫外線吸収性基含有不飽和単量体は、より具体的には下記化学式[1]   The UV-absorbing group-containing unsaturated monomer is, for example, a polymerizable benzotriazole compound, a polymerizable triazine compound, or a polymerizable benzophenone compound. More specifically, the UV-absorbing group-containing unsaturated monomer is represented by the following chemical formula [1].

Figure 2005171028
Figure 2005171028

(式[1]中、X−は水素原子、炭素数1〜6のアルキル基、アリール基、アラルキル基、炭素数1〜6のアルコキシル基またはハロゲン原子、−Rは水素原子、炭素数1〜8のアルキル基及び環状アルキル基、クミル基または炭素数1〜4のアルコキシル基、−Rは水素原子またはメチル基、−A−は炭素数1〜8のアルキレンオキシ基)で表される重合性ベンゾトリアゾール化合物、
下記化学式[2]
(In the formula [1], X- represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an aryl group, an aralkyl group, an alkoxyl group having 1 to 6 carbon atoms or a halogen atom, -R 1 represents a hydrogen atom, and 1 carbon atom. 8 alkyl group and a cyclic alkyl group, cumyl group or alkoxyl group having 1 to 4 carbon atoms, -R 2 is a hydrogen atom or a methyl group, -A- is represented by alkyleneoxy groups) of 1 to 8 carbon atoms Polymerizable benzotriazole compounds,
The following chemical formula [2]

Figure 2005171028
Figure 2005171028

(式[2]中、−R,−R,−Rは、同一または異なり水素原子、炭素数1〜6のアルキル基、または炭素数1〜6のアルコキシル基、−Rは水素原子またはメチル基、−B−は炭素数1〜8のアルキレンオキシ基、−(−CHCH−O−)−で示されmが2〜5である基、−CHCH(−OH)−CH−O−で示される基)で表される重合性トリアジン化合物、
または下記化学式[3]
(Wherein [2], -R 3, -R 4, -R 5 are the same or different hydrogen atom, an alkyl group having 1 to 6 carbon atoms or an alkoxyl group having 1 to 6 carbon atoms,, -R 6 is hydrogen atom or a methyl group, -B- is an alkyleneoxy group having 1 to 8 carbon atoms, - (- CH 2 CH 2 -O-) m - is indicated by m is 2 to 5 groups, -CH 2 CH (- A group represented by OH) —CH 2 —O—),
Or the following chemical formula [3]

Figure 2005171028
Figure 2005171028

(式[3]中、−Rは、水素原子、炭素数1〜6のアルキル基、または炭素数1〜6のアルコキシル基、−Rは水素原子またはメチル基、−D−は炭素数1〜8のアルキレンオキシ基、−(−CHCH−O−)−で示されnが2〜5である基、−CHCH(−OH)−CH−O−で示される基)で表される重合性ベンゾフェノン化合物が挙げられる。なお式[1]〜[3]中、アルキル基、およびアルコキシル基は直鎖状であっても分岐鎖状であってもよい。また、ベンゼン環内から引出された結合軸は環のいずれかの位置で置換されていることを示す。 (Wherein [3], -R 7 represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or an alkoxyl group having 1 to 6 carbon atoms,, -R 8 is a hydrogen atom or a methyl group,-D-the number of carbon atoms An alkyleneoxy group having 1 to 8; a group represented by — (— CH 2 CH 2 —O—) n — where n is 2 to 5, and represented by —CH 2 CH (—OH) —CH 2 —O—. And a polymerizable benzophenone compound represented by the following formula: In the formulas [1] to [3], the alkyl group and the alkoxyl group may be linear or branched. Moreover, it shows that the bond axis | shaft pulled out from the inside of a benzene ring is substituted at the position of the ring.

式[1]の重合性ベンゾトリアゾール化合物の具体例としては、例えば、2−(2’−ヒドロキシ−5’−(メタ)アクリロイルオキシエチルフェニル)−2H−ベンゾトリアゾール、2−(2’−ヒドロキシ−5’−(メタ)アクリロイルオキシエチルフェニル)−5−クロロ−2H−ベンゾトリアゾール、2−(2’−ヒドロキシ−5’−(メタ)アクリロイルオキシプロピルフェニル)−2H−ベンゾトリアゾール、2−(2’−ヒドロキシ−5’−(メタ)アクリロイルオキシプロピルフェニル)−5−クロロ−2H−ベンゾトリアゾール、2−(2’−ヒドロキシ−3’−tert−ブチル−5’−(メタ)アクリロイルオキシエチルフェニル)−2H−ベンゾトリアゾール、2−(2’−ヒドロキシ−3’−tert−ブチル−5’−(メタ)アクリロイルオキシエチルフェニル)−5−クロロ−2H−ベンゾトリアゾール等を挙げることができる。   Specific examples of the polymerizable benzotriazole compound of the formula [1] include, for example, 2- (2′-hydroxy-5 ′-(meth) acryloyloxyethylphenyl) -2H-benzotriazole, 2- (2′-hydroxy -5 ′-(meth) acryloyloxyethylphenyl) -5-chloro-2H-benzotriazole, 2- (2′-hydroxy-5 ′-(meth) acryloyloxypropylphenyl) -2H-benzotriazole, 2- ( 2'-hydroxy-5 '-(meth) acryloyloxypropylphenyl) -5-chloro-2H-benzotriazole, 2- (2'-hydroxy-3'-tert-butyl-5'-(meth) acryloyloxyethyl Phenyl) -2H-benzotriazole, 2- (2′-hydroxy-3′-tert-butyl-) '- (meth) acryloyloxyethyl phenyl) -5-chloro -2H- it can be mentioned benzotriazole.

式[2]の重合性トリアジン化合物の具体例としては、例えば、2,4−ジフェニル−6−[2−ヒドロキシ−4−(2−アクリロイルオキシエトキシ)フェニル]−s−トリアジン、2,4−ビス(2−メチルフェニル)−6−[2−ヒドロキシ−4−(3−アクリロイルオキシ−2−ヒドロキシプロピルオキシ)フェニル]−s−トリアジン、2,4−ビス(2−メトキシフェニル)−6−[2−ヒドロキシ−4−(2−アクリロイルオキシエトキシ)フェニル]−s−トリアジン、2,4−ビス(2−エチルフェニル)−6−[2−ヒドロキシ−4−(2−アクリロイルオキシエトキシ)フェニル]−s−トリアジン、2,4−ビス(2−エトキシフェニル)−6−[2−ヒドロキシ−4−(2−アクリロイルオキシエトキシ)フェニル]−s−トリアジン、2,4−ジフェニル−6−[2−ヒドロキシ−4−(2−メタクリロイルオキシエトキシ)フェニル]−s−トリアジン、2,4−ビス(2−メチルフェニル)−6−[2−ヒドロキシ−4−(2−メタクリロイルオキシエトキシ)フェニル]−s−トリアジン等を挙げることができる。   Specific examples of the polymerizable triazine compound of the formula [2] include 2,4-diphenyl-6- [2-hydroxy-4- (2-acryloyloxyethoxy) phenyl] -s-triazine, 2,4- Bis (2-methylphenyl) -6- [2-hydroxy-4- (3-acryloyloxy-2-hydroxypropyloxy) phenyl] -s-triazine, 2,4-bis (2-methoxyphenyl) -6 [2-Hydroxy-4- (2-acryloyloxyethoxy) phenyl] -s-triazine, 2,4-bis (2-ethylphenyl) -6- [2-hydroxy-4- (2-acryloyloxyethoxy) phenyl ] -S-triazine, 2,4-bis (2-ethoxyphenyl) -6- [2-hydroxy-4- (2-acryloyloxyethoxy) pheny ] -S-triazine, 2,4-diphenyl-6- [2-hydroxy-4- (2-methacryloyloxyethoxy) phenyl] -s-triazine, 2,4-bis (2-methylphenyl) -6- [ 2-hydroxy-4- (2-methacryloyloxyethoxy) phenyl] -s-triazine and the like.

式[3]の重合性ベンゾフェノン化合物の具体例としては、2−ヒドロキシ−4−アクリロイルオキシベンゾフェノン、2−ヒドロキシ−4−メタクリロイルオキシベンゾフェノン、2−ヒドロキシ−4−(2−アクリロイルオキシ)エトキシベンゾフェノン、2−ヒドロキシ−4−(2−メタクリロイルオキシ)エトキシベンゾフェノン、2−ヒドロキシ−4−(2−メチル−2−アクリロイルオキシ)エトキシベンゾフェノン等を挙げることができる。   Specific examples of the polymerizable benzophenone compound of the formula [3] include 2-hydroxy-4-acryloyloxybenzophenone, 2-hydroxy-4-methacryloyloxybenzophenone, 2-hydroxy-4- (2-acryloyloxy) ethoxybenzophenone, Examples include 2-hydroxy-4- (2-methacryloyloxy) ethoxybenzophenone, 2-hydroxy-4- (2-methyl-2-acryloyloxy) ethoxybenzophenone, and the like.

紫外線吸収性基含有不飽和単量体は、これらのうちのいずれかを単独で用いてもよく、2種以上を混合して用いてもよい。   Any of these UV-absorbing group-containing unsaturated monomers may be used alone, or two or more of them may be used in combination.

紫外線吸収性基含有不飽和単量体に共重合する別な不飽和単量体は、エチレン性不飽和単量体であって、(A)(メタ)アクリル酸のようなカルボキシル基含有の不飽和単量体と、(B)(メタ)アクリル酸エステル系の不飽和単量体、(メタ)アクリル酸アミド系の不飽和単量体、ビニルエーテル系の不飽和単量体、ビニルエステル系単量体、スチレン系単量体等その他共重合可能なエチレン系不飽和単量体とが挙げられる。   Another unsaturated monomer that is copolymerized with the UV-absorbing group-containing unsaturated monomer is an ethylenically unsaturated monomer that contains (A) a carboxyl group-containing unsaturated monomer such as (meth) acrylic acid. (B) (meth) acrylic acid ester type unsaturated monomer, (meth) acrylic acid amide type unsaturated monomer, vinyl ether type unsaturated monomer, vinyl ester type single monomer And other copolymerizable ethylenically unsaturated monomers such as monomers and styrene monomers.

カルボキシル基含有の不飽和単量体(A)の具体例としては、クロトン酸、イタコン酸、マレイン酸、アクリル酸、メタクリル酸等が挙げられる。この不飽和単量体は、これらのうちのいずれかを単独で用いてもよく、2種以上を混合して用いてもよい。   Specific examples of the carboxyl group-containing unsaturated monomer (A) include crotonic acid, itaconic acid, maleic acid, acrylic acid, and methacrylic acid. Any one of these unsaturated monomers may be used alone, or two or more of them may be used in combination.

その他共重合可能なエチレン系不飽和単量体(B)中、(メタ)アクリル酸エステル系単量体の具体例としては、例えば、(メタ)アクリル酸メチル、(メタ)アクリル酸エチル、(メタ)アクリル酸プロピル、(メタ)アクリル酸ブチル、(メタ)アクリル酸シクロヘキシル、(メタ)アクリル酸シクロペンチル、(メタ)アクリル酸ベンジル、(メタ)アクリル酸2−エチルヘキシル、(メタ)アクリル酸2−ヒドロキシエチル、(メタ)アクリル酸2−ジメチルアミノエチル、(メタ)アクリル酸塩化トリメチルアミノエチル、(メタ)アクリル酸グリシジル、ポリエチレングリコールモノ(メタ)アクリル酸エステル、ポリプロピレングリコールモノ(メタ)アクリル酸エステル等が挙げられ、(メタ)アクリル酸アミド系単量体の具体例としては、tert−ブチルアクリルアミド、n−ブトキシメチルアクリルアミド等が挙げられ、その他のエチレン性不飽和単量体としては、例えば、スチレン、α−メチルスチレン、ラウリルビニルエーテル、ビニルブチレート等が挙げられる。   Other specific examples of the (meth) acrylic acid ester monomer in the copolymerizable ethylenically unsaturated monomer (B) include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, ( (Meth) acrylic acid propyl, (meth) acrylic acid butyl, (meth) acrylic acid cyclohexyl, (meth) acrylic acid cyclopentyl, (meth) acrylic acid benzyl, (meth) acrylic acid 2-ethylhexyl, (meth) acrylic acid 2- Hydroxyethyl, 2-dimethylaminoethyl (meth) acrylate, (meth) acrylated trimethylaminoethyl, glycidyl (meth) acrylate, polyethylene glycol mono (meth) acrylate, polypropylene glycol mono (meth) acrylate Of (meth) acrylic acid amide monomers Examples of the body include tert-butyl acrylamide and n-butoxymethyl acrylamide, and other ethylenically unsaturated monomers include, for example, styrene, α-methyl styrene, lauryl vinyl ether, vinyl butyrate, and the like. .

この不飽和単量体は、これらのうちのいずれかを単独で用いてもよく、2種以上を混合して用いてもよい。   Any one of these unsaturated monomers may be used alone, or two or more of them may be used in combination.

共重合物の酸価は50〜400mgKOH/gであると好ましい。   The acid value of the copolymer is preferably 50 to 400 mgKOH / g.

本発明の共重合物は、溶液重合により得られる。具体的には紫外線吸収性基含有不飽和単量体、(A)の単量体、(B)の単量体を、重合開始剤の存在下、適当な不活性溶媒中で重合して製造される。また、必要に応じて、これら単量体、重合開始剤、および不活性溶媒は、反応容器に一括に仕込み、重合を行う方法、滴下等により連続的に、もしくは、分割してそれぞれの成分を供給しながら重合を行う方法等、目的とする物性を有する分散剤を得るために適宜選択することができる。反応温度は70〜150℃、さらに好ましくは80〜130℃である。反応時間は1〜15時間、特に4〜8時間が望ましい。   The copolymer of the present invention is obtained by solution polymerization. Specifically, it is produced by polymerizing an ultraviolet-absorbing group-containing unsaturated monomer, a monomer (A), and a monomer (B) in a suitable inert solvent in the presence of a polymerization initiator. Is done. Further, if necessary, these monomers, polymerization initiator, and inert solvent are charged into the reaction vessel in a lump, and the respective components are added continuously or divided by a method of performing polymerization, dropping, or the like. In order to obtain a dispersant having the desired physical properties such as a method of performing polymerization while supplying, it can be appropriately selected. The reaction temperature is 70 to 150 ° C, more preferably 80 to 130 ° C. The reaction time is preferably 1 to 15 hours, particularly 4 to 8 hours.

重合開始剤としては、アゾビスイソブチロニトリル、ジメチルアゾビスイソブチレート等のアゾ系化合物、ラウロイルパーオキサイド、ジイソプロピルベンゼンハイドロパーオキサイド等の有機過酸化物等が挙げられる。   Examples of the polymerization initiator include azo compounds such as azobisisobutyronitrile and dimethylazobisisobutyrate, and organic peroxides such as lauroyl peroxide and diisopropylbenzene hydroperoxide.

溶媒としては、共重合反応に悪影響を及ぼさない物であれば特に制限は無く、紫外線吸収性共重合物を溶解でき、塗料やインキとなる硬化性の分散組成物に混和できるものが好ましく、例えば、キシレン、ソルベッソ100や同150(いずれもエクソン化学株式会社製の商品名)のような芳香族溶剤、メチルイソブチルケトンのようなケトン系溶剤;酢酸エチル、酢酸ブチルのようなエステル系溶剤;ブチルセロソルブ、エチルセロソルブのようなセロソルブ系溶剤;プロピレングリコールモノメチルエーテルのようなプロピレングリコール系溶剤;エチレングリコールモノエチルエーテルアセテートのようなセロソルブアセテート系溶剤;プロピレングリコールモノメチルエーテルアセテートのようなプロピレングリコールモノアルキルエーテルアセテート系溶剤が挙げられる。これらの溶剤は単独で使用しても、混合して使用してもよい。   The solvent is not particularly limited as long as it does not adversely affect the copolymerization reaction, and is preferably a solvent that can dissolve the UV-absorbing copolymer and can be mixed with a curable dispersion composition that becomes a paint or ink. , Xylene, Solvesso 100 and 150 (both are trade names manufactured by Exxon Chemical Co., Ltd.), aromatic solvents such as methyl isobutyl ketone; ester solvents such as ethyl acetate and butyl acetate; butyl cellosolve Cellosolve solvents such as ethyl cellosolve; propylene glycol solvents such as propylene glycol monomethyl ether; cellosolve acetate solvents such as ethylene glycol monoethyl ether acetate; propylene glycol monoalkyl such as propylene glycol monomethyl ether acetate It includes over ether acetate solvent. These solvents may be used alone or in combination.

重合時の分子量を調整する連鎖移動剤としては、必要に応じてn−ドデシルメルカプタン、tert−ドデシルメルカプタン、α−メチルスチレンダイマー、β−メルカプトプロピオン酸、ターピネオール等を用いてもよい。   As a chain transfer agent for adjusting the molecular weight during polymerization, n-dodecyl mercaptan, tert-dodecyl mercaptan, α-methylstyrene dimer, β-mercaptopropionic acid, terpineol and the like may be used as necessary.

分散させる顔料や微粉末鉱物としては特に制限は無く、例えばキナクリドンレッド、アンスラキノンレッド、フタロシアニンブルー、酸化鉄、酸化亜鉛、酸化チタン等が挙げられる。特に、光触媒特性を有している酸化チタン等が好ましいが、これらに限るものではない。   The pigment or fine powder mineral to be dispersed is not particularly limited, and examples thereof include quinacridone red, anthraquinone red, phthalocyanine blue, iron oxide, zinc oxide, and titanium oxide. In particular, titanium oxide or the like having photocatalytic properties is preferable, but is not limited thereto.

本発明の硬化性の分散組成物は、分散剤と顔料および/または微粉末鉱物とを含有するものである。これらを充分分散できるように分散剤の量は任意に適宜調整される。この分散組成物は、(メタ)アクリル樹脂やメラミン樹脂のように塗膜等を形成する樹脂を含んでいてもよい。溶媒、酸触媒やレベリング剤のような添加剤を含んでいてもよい。この分散組成物は、例えば塗料や樹脂原料組成物である。   The curable dispersion composition of the present invention contains a dispersant and a pigment and / or fine powder mineral. The amount of the dispersant is arbitrarily adjusted as appropriate so that these can be sufficiently dispersed. This dispersion composition may contain a resin that forms a coating film or the like, such as a (meth) acrylic resin or a melamine resin. Additives such as solvents, acid catalysts and leveling agents may be included. This dispersion composition is, for example, a paint or a resin raw material composition.

本発明の硬化物は、例えばこの分散組成物を熱や紫外線のような活性エネルギー線で硬化させたり、溶媒を揮発させて硬化させたりしたもので、塗膜や形成樹脂を形成するものである。   The cured product of the present invention is formed by, for example, curing this dispersion composition with active energy rays such as heat or ultraviolet rays or volatilizing the solvent to cure, and forms a coating film or a formed resin. .

本発明の分散剤の効果の機構としては、紫外線吸収性部位を顔料分散剤であるポリマーの骨格に組み込むことにより、紫外線吸収性部位が光触媒活性を有する顔料の近傍にて、紫外線を吸収し、効率良く光触媒活性を抑制することによりチョーキング等が起こり難くなるものと推察される。   As a mechanism of the effect of the dispersant of the present invention, by incorporating an ultraviolet absorbing site into the polymer skeleton which is a pigment dispersant, the ultraviolet absorbing site absorbs ultraviolet rays in the vicinity of the pigment having photocatalytic activity, It is presumed that choking or the like hardly occurs by efficiently suppressing the photocatalytic activity.

本発明の分散剤は、顔料や微粉末鉱物のような被分散物を均等に分散させるだけでなく、他の物性を劣化させることなく塗料皮膜や樹脂成型品に優れた耐候性を付与することができる。   The dispersant of the present invention not only uniformly disperses the dispersions such as pigments and fine powder minerals, but also imparts excellent weather resistance to paint films and resin molded products without degrading other physical properties. Can do.

以下に、本発明の実施例を詳細に説明する。   Examples of the present invention will be described in detail below.

(分散剤の合成例1)
温度調節機、攪拌器、還流冷却器、滴下ロートおよび窒素ガス導入管を備えた反応器に、溶媒として3−メチル−3−メトキシブタノール50重量部を仕込み窒素置換した。紫外線吸収性基含有不飽和単量体として2−[2’−ヒドロキシ−5’−(メタクリロイルオキシエチル)フェニル]−2H−ベンゾトリアゾールであるRUVA−93(大塚化学株式会社製の商品名)の15重量部、別な不飽和単量体としてメチルメタクリレートの20重量部とアクリル酸の15重量部、重合開始剤としてラウロイルパーオキサイド1.0重量部、及び連鎖移動剤5.0重量部を、3−メチル−3−メトキシブタノール150重量部に加え撹拌した。この混合液を滴下ロート中で撹拌しながら、窒素雰囲気下で反応器へ内温105℃で2時間半かけ撹拌下に滴下した。その後、同一温度で3時間熟成し紫外線吸収性共重合物を合成した。これに3−メチル−3−メトキシブタノールを加えて、固形分が15重量%となるように調整し、分散剤の溶液を得た。
(Dispersant Synthesis Example 1)
A reactor equipped with a temperature controller, a stirrer, a reflux condenser, a dropping funnel and a nitrogen gas introduction tube was charged with 50 parts by weight of 3-methyl-3-methoxybutanol as a solvent, and the atmosphere was replaced with nitrogen. As UV-absorbing group-containing unsaturated monomer, 2- [2′-hydroxy-5 ′-(methacryloyloxyethyl) phenyl] -2H-benzotriazole, RUVA-93 (trade name, manufactured by Otsuka Chemical Co., Ltd.) 15 parts by weight, 20 parts by weight of methyl methacrylate as another unsaturated monomer and 15 parts by weight of acrylic acid, 1.0 part by weight of lauroyl peroxide as a polymerization initiator, and 5.0 parts by weight of a chain transfer agent, The mixture was added to 150 parts by weight of 3-methyl-3-methoxybutanol and stirred. While stirring this mixed solution in a dropping funnel, the mixture was added dropwise to the reactor under stirring at an internal temperature of 105 ° C. for 2 hours and a half under a nitrogen atmosphere. Thereafter, it was aged at the same temperature for 3 hours to synthesize an ultraviolet-absorbing copolymer. 3-Methyl-3-methoxybutanol was added thereto to adjust the solid content to 15% by weight to obtain a dispersant solution.

得られた共重合物の酸価は固形分に換算して216mgKOH/gであった。また、この共重合物について、ゲルパーミエーションクロマトグラフィー(GPC)により重量平均分子量を測定した。カラムとしてKF−804L×4(Shodex社製の商品名)を用い、クロマトグラフ装置としてシステム11(Shodex社製の商品名)により、測定温度40℃でテトラヒドロフラン溶媒を1.0ml/min流速で測定したところ、この共重合物の重量平均分子量(Mw)は、ポリスチレン換算で1700であった。   The acid value of the obtained copolymer was 216 mgKOH / g in terms of solid content. Moreover, about this copolymer, the weight average molecular weight was measured by the gel permeation chromatography (GPC). Measure tetrahydrofuran solvent at a measurement temperature of 40 ° C. at a flow rate of 1.0 ml / min using KF-804L × 4 (trade name, manufactured by Shodex) as a column and system 11 (trade name, manufactured by Shodex) as a chromatographic apparatus. As a result, the weight average molecular weight (Mw) of this copolymer was 1700 in terms of polystyrene.

(分散剤の合成例2)
合成例1の重合開始剤ラウロイルパーオキサイドをアゾビスイソブチロニトリル(AIBN)0.5重量部に変えたこと以外は合成例1と同様して反応を行い、固形分酸価が203mgKOH/g、Mwが1900である分散剤の溶液を得た。
(Dispersant Synthesis Example 2)
The reaction was conducted in the same manner as in Synthesis Example 1 except that the polymerization initiator lauroyl peroxide in Synthesis Example 1 was changed to 0.5 part by weight of azobisisobutyronitrile (AIBN), and the solid content acid value was 203 mgKOH / g. A solution of a dispersant having an Mw of 1900 was obtained.

(分散剤の合成例3)
合成例1の重合開始剤ラウロイルパーオキサイドをAIBNの0.5重量部に変えたことと、連鎖移動剤を0.5重量部に変えたこと以外は合成例1と同様に反応を行い、固形分酸価が205mgKOH/g、Mwが5300の分散剤の溶液を得た。
(Dispersant Synthesis Example 3)
The reaction was conducted in the same manner as in Synthesis Example 1 except that the polymerization initiator lauroyl peroxide in Synthesis Example 1 was changed to 0.5 parts by weight of AIBN and the chain transfer agent was changed to 0.5 parts by weight. A solution of a dispersant having a partial acid value of 205 mgKOH / g and Mw of 5300 was obtained.

(分散剤の合成例4)
合成例1の重合開始剤ラウロイルパーオキサイドをAIBNの0.5重量部に変えたことと、連鎖移動剤を0.25重量部に変えたこと以外は合成例1と同様に反応を行い、固形分酸価が191mgKOH/g、Mwが9800の分散剤の溶液を得た。
(Dispersant Synthesis Example 4)
The reaction was conducted in the same manner as in Synthesis Example 1 except that the polymerization initiator lauroyl peroxide in Synthesis Example 1 was changed to 0.5 parts by weight of AIBN and the chain transfer agent was changed to 0.25 parts by weight. A solution of a dispersant having a partial acid value of 191 mg KOH / g and Mw of 9800 was obtained.

(分散剤の合成例5)
合成例1の重合開始剤ラウロイルパーオキサイドをAIBNの0.5重量部に変えたことと、連鎖移動剤を0.3重量部に変えたこと以外は合成例1と同様に反応を行い、固形分酸価が200mgKOH/g、Mwが9300の分散剤の溶液を得た。
(Dispersant Synthesis Example 5)
The reaction was conducted in the same manner as in Synthesis Example 1 except that the polymerization initiator lauroyl peroxide in Synthesis Example 1 was changed to 0.5 parts by weight of AIBN and the chain transfer agent was changed to 0.3 parts by weight. A solution of a dispersant having a partial acid value of 200 mgKOH / g and Mw of 9300 was obtained.

(アクリル樹脂の合成例A)
温度計、還流冷却器、攪拌器、滴下ロート、窒素ガス導入管を備えた4つ口フラスコに、トルエン25重量部、酢酸ブチル25重量部を入れた。メチルメタクリレート18重量部、ブチルアクリレート18重量部、2−ヒドロキシプロピルメタクリレート13重量部、過酸化ジベンゾイル1重量部を均一になるまで攪拌して単量体混合物とし、それを滴下ロートに入れた。4つ口フラスコを100℃に加熱し、単量体混合物を3時間かけて滴下した。不揮発成分が50重量%となるまでチェックしながらさらに1時間保持した。その後、冷却し、トルエン/酢酸ブチル(1/1)で希釈して、固形分が40重量%となるように調整して、塗膜形成樹脂であるアクリル樹脂を得た。
(Synthesis example A of acrylic resin)
25 parts by weight of toluene and 25 parts by weight of butyl acetate were placed in a four-necked flask equipped with a thermometer, reflux condenser, stirrer, dropping funnel, and nitrogen gas introduction tube. 18 parts by weight of methyl methacrylate, 18 parts by weight of butyl acrylate, 13 parts by weight of 2-hydroxypropyl methacrylate, and 1 part by weight of dibenzoyl peroxide were stirred until they became uniform to obtain a monomer mixture, which was put into a dropping funnel. The four-necked flask was heated to 100 ° C., and the monomer mixture was added dropwise over 3 hours. It was further held for 1 hour while checking until the non-volatile component became 50% by weight. Then, it cooled and diluted with toluene / butyl acetate (1/1), and it adjusted so that solid content might be 40 weight%, and obtained the acrylic resin which is coating-film formation resin.

(実施例1〜5、および比較例1)
このアクリル樹脂、キシレン、合成例1〜5の分散剤、分散すべき顔料として酸化チタンCR−90(石原産業株式会社製の商品名)をサンドミルを用いて20分間分散し、その後塗膜形成樹脂としてメラミン樹脂であるサイメル303(サイテック社製の商品名)、酸触媒としてNACURE5225(KING社製の商品名)、レベリング剤としてポリフローNo.90(共栄社化学株式会社製の商品名)を、表1に記載の配合量で混合し、分散組成物として塗料を得た。
(Examples 1-5 and Comparative Example 1)
Disperse the acrylic resin, xylene, the dispersants of Synthesis Examples 1 to 5 and titanium oxide CR-90 (trade name, manufactured by Ishihara Sangyo Co., Ltd.) as a pigment to be dispersed using a sand mill for 20 minutes, and then coat-forming resin As a melamine resin (trade name, manufactured by Cytec), NACURE 5225 (trade name, manufactured by KING) as an acid catalyst, and Polyflow No. 5 as a leveling agent. 90 (trade name, manufactured by Kyoeisha Chemical Co., Ltd.) was mixed in the blending amounts shown in Table 1 to obtain a paint as a dispersion composition.

Figure 2005171028
Figure 2005171028

(塗膜の形成)
実施例1〜5および比較例1で得られた塗料を、0.8mmのリン酸亜鉛の処理板にスプレー塗装し、160℃で20分間、熱風乾燥炉で焼付け、塗膜が形成された試験片を得た。
(Formation of coating film)
A test in which the paints obtained in Examples 1 to 5 and Comparative Example 1 were spray-coated on a 0.8 mm zinc phosphate treated plate and baked at 160 ° C. for 20 minutes in a hot air drying oven to form a coating film. I got a piece.

これらの試験片について、塗膜の光沢性、耐疵つき性、耐薬品性、耐候性、耐衝撃性について以下のように試験を行い、物性を評価した。   About these test pieces, the physical properties were evaluated by conducting tests as follows for the gloss, wrinkle resistance, chemical resistance, weather resistance, and impact resistance of the coating film.

(光沢性試験)
各試験片について、村上式光沢計GM−3D(株式会社村上色彩技術研究所製の商品名)により、60°鏡面反射率を測定した。
(Glossiness test)
About each test piece, 60 degree specular reflectance was measured by Murakami type gloss meter GM-3D (brand name made by Murakami Color Research Laboratory Co., Ltd.).

(耐疵付き性試験)
各試験片について、JIS K5400による鉛筆引っかき試験方法に従って、硬さを評価した。
(Scratch resistance test)
About each test piece, the hardness was evaluated according to the pencil scratch test method by JISK5400.

(耐薬品性試験)
5重量%の硫酸水溶液、または5重量%の水酸化ナトリウム水溶液に各試験片を浸漬し、20℃24時間後の塗膜状態を観察した。跡が全くないものを◎、跡がわずかに認められるものを○、跡がやや目立つものを△、跡が濃く残るものを×、塗膜が剥離したものを剥離とする、5段階で評価した。
(Chemical resistance test)
Each test piece was immersed in a 5% by weight sulfuric acid aqueous solution or a 5% by weight sodium hydroxide aqueous solution, and the coating state after 24 hours at 20 ° C. was observed. Evaluation was made in 5 steps, with ◎ having no traces, ◯ having slight traces, △ having slightly noticeable traces, X having traces remaining dark, and exfoliating those with the coating peeled off. .

(耐候性試験)
サンシャインウェザーOメーター試験により、1000時間後の光沢保持率(%)を測定した。
(Weather resistance test)
The gloss retention (%) after 1000 hours was measured by a sunshine weather O meter test.

(耐衝撃性試験)
JIS K5400のデュポン法に従い、荷重500g 高さ50cm 20℃の条件で試験を行い、目視により観察したとき、塗膜に異常がないものを合格、塗膜に異常があるものを不合格とする2段階で評価した。
(Impact resistance test)
According to the DuPont method of JIS K5400, when a test is performed under the conditions of a load of 500 g, a height of 50 cm, and 20 ° C. and observed visually, a coating having no abnormality is passed, and a coating having an abnormality is rejected. Rated by stage.

これらの試験結果をまとめて表1に示す。   These test results are summarized in Table 1.

表1から明らかなとおり、本発明を適用する実施例1〜5の塗膜は、60°鏡面反射率が高く光沢性に優れ、硬さがHで疵が付着し難く、酸やアルカリに対する耐薬品性が強く、光沢保持率が高くて耐候性に優れ、また衝撃に対して強いものであった。それに対し、本発明を適用外の比較例の塗膜は光沢保持率が不十分で耐候性が劣る結果であった。   As is apparent from Table 1, the coating films of Examples 1 to 5 to which the present invention is applied have a high 60 ° specular reflectance, excellent gloss, hardness of H, hardly wrinkles, and resistance to acids and alkalis. It had strong chemical properties, high gloss retention, excellent weather resistance, and was strong against impact. On the other hand, the coating film of the comparative example, to which the present invention was not applied, had the result that the gloss retention was insufficient and the weather resistance was inferior.

本発明の分散剤は、塗料組成物や樹脂原料組成物に添加して、顔料や微粉末鉱物を分散させるために使用される。これらの組成物は、顔料等、特に光触媒活性を有する顔料等が含まれていても、耐候性が優れた塗膜や成形樹脂等の硬化物を形成する。   The dispersant of the present invention is added to a coating composition or a resin raw material composition to disperse a pigment or fine powder mineral. Even if these compositions contain pigments, particularly pigments having photocatalytic activity, they form a cured product such as a coating film or a molded resin having excellent weather resistance.

Claims (7)

紫外線吸収性基含有不飽和単量体0.01〜70重量%と別な不飽和単量体とが共重合した重量平均分子量500〜100000のカルボキシル基を有する紫外線吸収性共重合物。 An ultraviolet-absorbing copolymer having a carboxyl group having a weight average molecular weight of 500 to 100,000, which is obtained by copolymerizing an ultraviolet-absorbing group-containing unsaturated monomer in an amount of 0.01 to 70% by weight and another unsaturated monomer. 請求項1に記載の紫外線吸収性共重合物を含有し、顔料および/または微粉末鉱物を分散させる分散剤。 The dispersing agent which contains the ultraviolet absorptive copolymer of Claim 1, and disperse | distributes a pigment and / or a fine powder mineral. 前記紫外線吸収性基含有不飽和単量体が、下記化学式[1]
Figure 2005171028
(式[1]中、X−は水素原子、炭素数1〜6のアルキル基、アリール基、アラルキル基、炭素数1〜6のアルコキシル基またはハロゲン原子、−Rは水素原子、炭素数1〜8のアルキル基及び環状アルキル基、クミル基または炭素数1〜4のアルコキシル基、−Rは水素原子またはメチル基、−A−は炭素数1〜8のアルキレンオキシ基)で表される重合性ベンゾトリアゾール化合物、
下記化学式[2]
Figure 2005171028
(式[2]中、−R,−R,−Rは、同一または異なり水素原子、炭素数1〜6のアルキル基、または炭素数1〜6のアルコキシル基、−Rは水素原子またはメチル基、−B−は炭素数1〜8のアルキレンオキシ基、−(−CHCH−O−)−で示されmが2〜5である基、−CHCH(−OH)−CH−O−で示される基)で表される重合性トリアジン化合物、
または下記化学式[3]
Figure 2005171028
(式[3]中、−Rは、水素原子、炭素数1〜6のアルキル基、または炭素数1〜6のアルコキシル基、−Rは水素原子またはメチル基、−D−は炭素数1〜8のアルキレンオキシ基、−(−CHCH−O−)−で示されnが2〜5である基、−CHCH(−OH)−CH−O−で示される基)で表される重合性ベンゾフェノン化合物であることを特徴とする請求項2に記載の分散剤。
The UV-absorbing group-containing unsaturated monomer is represented by the following chemical formula [1]
Figure 2005171028
(In the formula [1], X- represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an aryl group, an aralkyl group, an alkoxyl group having 1 to 6 carbon atoms or a halogen atom, -R 1 represents a hydrogen atom, and 1 carbon atom. 8 alkyl group and a cyclic alkyl group, cumyl group or alkoxyl group having 1 to 4 carbon atoms, -R 2 is a hydrogen atom or a methyl group, -A- is represented by alkyleneoxy groups) of 1 to 8 carbon atoms Polymerizable benzotriazole compounds,
The following chemical formula [2]
Figure 2005171028
(Wherein [2], -R 3, -R 4, -R 5 are the same or different hydrogen atom, an alkyl group having 1 to 6 carbon atoms or an alkoxyl group having 1 to 6 carbon atoms,, -R 6 is hydrogen atom or a methyl group, -B- is an alkyleneoxy group having 1 to 8 carbon atoms, - (- CH 2 CH 2 -O-) m - is indicated by m is 2 to 5 groups, -CH 2 CH (- A group represented by OH) —CH 2 —O—),
Or the following chemical formula [3]
Figure 2005171028
(Wherein [3], -R 7 represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or an alkoxyl group having 1 to 6 carbon atoms,, -R 8 is a hydrogen atom or a methyl group,-D-the number of carbon atoms An alkyleneoxy group having 1 to 8; a group represented by — (— CH 2 CH 2 —O—) n — where n is 2 to 5, and represented by —CH 2 CH (—OH) —CH 2 —O—. The dispersant according to claim 2, which is a polymerizable benzophenone compound represented by the following formula:
前記紫外線吸収性共重合物の酸価が50〜400mgKOH/gであることを特徴とする請求項2に記載の分散剤。 The dispersant according to claim 2, wherein the ultraviolet-absorbing copolymer has an acid value of 50 to 400 mgKOH / g. 前記顔料および/または微粉末鉱物が、光触媒特性を有していることを特徴とする請求項2に記載の分散剤。 The dispersant according to claim 2, wherein the pigment and / or fine powder mineral has a photocatalytic property. 請求項2〜5のいずれかに記載の分散剤と前記顔料および/または微粉末鉱物とを含有することを特徴とする硬化性の分散組成物。 A curable dispersion composition comprising the dispersant according to claim 2 and the pigment and / or fine powder mineral. 請求項6に記載の硬化性の分散組成物を硬化させたことを特徴とする硬化物。 A cured product obtained by curing the curable dispersion composition according to claim 6.
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EP2295511A1 (en) 2009-09-15 2011-03-16 Fujifilm Corporation Ink composition for inkjet
CN102212151A (en) * 2011-04-26 2011-10-12 盐城工学院 Preparation method for polymerizable benzophenone photoinitiator containing amine used as auxiliary initiator
EP2551303A1 (en) * 2010-03-24 2013-01-30 Dainichiseika Color & Chemicals Mfg. Co., Ltd. Resin-treated pigment, method for producing the pigment, and pigment dispersion
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008045046A (en) * 2006-08-17 2008-02-28 Gunze Ltd Stretch label, method for producing the same, adhesive for stretch label, and plastic bottle
EP2295511A1 (en) 2009-09-15 2011-03-16 Fujifilm Corporation Ink composition for inkjet
JP2011063656A (en) * 2009-09-15 2011-03-31 Fujifilm Corp Ink composition for inkjet
EP2551303A1 (en) * 2010-03-24 2013-01-30 Dainichiseika Color & Chemicals Mfg. Co., Ltd. Resin-treated pigment, method for producing the pigment, and pigment dispersion
EP2551303A4 (en) * 2010-03-24 2013-10-02 Dainichiseika Color Chem Resin-treated pigment, method for producing the pigment, and pigment dispersion
US8895646B2 (en) 2010-03-24 2014-11-25 Dainichiseika Color & Chemicals Mfg. Co., Ltd. Pigment dispersion and method for producing resin-treated pigment in the pigment dispersion
CN102212151A (en) * 2011-04-26 2011-10-12 盐城工学院 Preparation method for polymerizable benzophenone photoinitiator containing amine used as auxiliary initiator
CN102212151B (en) * 2011-04-26 2013-03-20 盐城工学院 Polymerizable benzophenone photoinitiator containing amine used as auxiliary initiator and preparation method thereof
CN103048883A (en) * 2012-12-05 2013-04-17 北京化工大学常州先进材料研究院 Photosensitive composition containing polymerizable photoinitiator
CN103048883B (en) * 2012-12-05 2014-08-13 北京化工大学常州先进材料研究院 Photosensitive composition containing polymerizable photoinitiator

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