JPS5825117B2 - Thermosetting powder resin composition for powder coatings - Google Patents

Thermosetting powder resin composition for powder coatings

Info

Publication number
JPS5825117B2
JPS5825117B2 JP8839475A JP8839475A JPS5825117B2 JP S5825117 B2 JPS5825117 B2 JP S5825117B2 JP 8839475 A JP8839475 A JP 8839475A JP 8839475 A JP8839475 A JP 8839475A JP S5825117 B2 JPS5825117 B2 JP S5825117B2
Authority
JP
Japan
Prior art keywords
weight
powder
acid
component
copolymer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP8839475A
Other languages
Japanese (ja)
Other versions
JPS5212238A (en
Inventor
佐藤幹夫
笹栗騏一郎
松尾俊次
松本嘉生
中村克之
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Chemical Industry Co Ltd filed Critical Asahi Chemical Industry Co Ltd
Priority to JP8839475A priority Critical patent/JPS5825117B2/en
Publication of JPS5212238A publication Critical patent/JPS5212238A/en
Publication of JPS5825117B2 publication Critical patent/JPS5825117B2/en
Expired legal-status Critical Current

Links

Description

【発明の詳細な説明】 本発明は、無公害、省資源の面で注目されている粉体塗
料用として、従来にないすぐれた貯蔵安定性と実用塗膜
性能とを示す熱硬化性アクリル系粉体樹脂組成物に関す
る。
DETAILED DESCRIPTION OF THE INVENTION The present invention is a thermosetting acrylic coating material that exhibits unprecedented storage stability and practical coating performance for powder coatings, which are attracting attention in terms of pollution-free and resource-saving properties. The present invention relates to a powder resin composition.

熱硬化性のアクリル系粉体塗料用樹脂組成物として、カ
ルボキシル基を含有するアクリルポリマーにエポキシ化
合物を組合せる組成物は既に公知である。
As thermosetting acrylic powder coating resin compositions, compositions in which an epoxy compound is combined with an acrylic polymer containing a carboxyl group are already known.

しかし、ここに使用されるエポキシ化合物に従来適正な
ものが見出されておらず、粉体塗料に要求される性能を
充足できず、いまだに実用化されずにいる。
However, no suitable epoxy compound has been found so far to be used, and the performance required for powder coatings cannot be met, so it has not yet been put into practical use.

すなわち、粉体塗料においては貯蔵中に粉体塗料粒子が
固まって、いわゆる、ピリング、グーキングあるいはブ
ロッキングと言われる凝固現象が起らない事が不可欠で
ある。
That is, in powder coatings, it is essential that powder coating particles do not solidify during storage, causing so-called coagulation phenomena such as pilling, gooking, or blocking.

この貯蔵安定性を良くするためには、エポキシ化合物と
して固形で高融点のものを用いるのが良いが、通常この
条件を充たすエポキシ化合物は、エポキシ当量が太きい
ため、アクリルポリマーに配合する量が増大し、アクリ
ル系塗料としての特質を著しくそこなう結果となる。
In order to improve this storage stability, it is best to use a solid epoxy compound with a high melting point, but epoxy compounds that meet this condition usually have a large epoxy equivalent, so the amount added to the acrylic polymer is This results in a significant deterioration of the properties of the acrylic paint.

一方、エポキシ当量の小さいエポキシ化合物は多くは液
状であり、又、トリグリシジルイソシアヌレートのよう
な固形の化合物であっても貯蔵安定性が悪く実用性に乏
しかった。
On the other hand, most epoxy compounds with low epoxy equivalents are in liquid form, and even solid compounds such as triglycidyl isocyanurate have poor storage stability and are of little practical use.

本発明者らは種々のエポキシ化合物についてアクリルポ
リマーとの配合適正を研究した結果、上記欠点を克服し
アクリル樹脂の本来有すべき諸機能を最高度に生かす本
発明に達した。
As a result of research into the suitability of blending various epoxy compounds with acrylic polymers, the present inventors have arrived at the present invention, which overcomes the above-mentioned drawbacks and maximizes the various functions inherent in acrylic resins.

すなわち、本発明は(5)ガラス転移温度30ないし9
0℃、重量平均分子量2500ないし60000を有し
、且つ、α・β−不飽和カルボン酸3〜30重量%と他
のエチレン性不飽和化合物97〜70重量%との共重合
体に(B)一般式の構造を有するエポキシ化合物 を配合してなる粉体塗料用熱硬化性粉体樹脂組成物に関
する。
That is, the present invention provides (5) a glass transition temperature of 30 to 9;
0°C, a weight average molecular weight of 2500 to 60000, and a copolymer of 3 to 30% by weight of an α/β-unsaturated carboxylic acid and 97 to 70% by weight of another ethylenically unsaturated compound (B) The present invention relates to a thermosetting powder resin composition for powder coatings, which contains an epoxy compound having the structure of the general formula.

本発明は特に多価エポキシ化合物として使用する(B)
成分化合物に特徴があり、この化合物はエポキシ当量が
比較的小さく、又、グリシジルエーテル結合及びグリシ
ジルエステル結合を持っていることなどのため、架橋反
応後の硬化塗膜に、強靭な可とう性、耐まもう性に富ん
だ高硬度の塗膜を与えるばかりでなく金属との密着性に
すぐれ、優れた塗面光沢及び耐候性を与え、しかも実用
的な塗料粉体の貯蔵安定性を示す組成物を得ることが出
来る。
The present invention is particularly used as a polyepoxy compound (B)
The component compound has characteristics such as a relatively small epoxy equivalent and a glycidyl ether bond and a glycidyl ester bond, so that the cured coating film after the crosslinking reaction has strong, flexible properties. A composition that not only provides a highly hard coating film with excellent wear resistance, but also has excellent adhesion to metals, provides excellent coating surface gloss and weather resistance, and also exhibits storage stability of a practical paint powder. You can get things.

本発明をさらに詳細に説明すると、前記(A)成分共重
合体は、その構成成分となる単量体として、α・β−不
飽和カルボン酸は必須である。
To explain the present invention in more detail, the component copolymer (A) essentially includes an α/β-unsaturated carboxylic acid as a constituent monomer.

α・β−不飽和カルボン酸としては、例えば、アクリル
酸、メタクリル酸、マレイン酸、イタコン酸、シトラコ
ン酸などがある。
Examples of α/β-unsaturated carboxylic acids include acrylic acid, methacrylic acid, maleic acid, itaconic acid, and citraconic acid.

本単量体の使用量は前記(5)の共重合体を構成する全
共重合体の3〜30重量%、特に好ましくは5〜20重
量%である。
The amount of this monomer used is 3 to 30% by weight, particularly preferably 5 to 20% by weight, based on the total copolymer constituting the copolymer (5).

上記単量体成分が3重量%未満では、架橋が十分でなく
、硬化した塗膜の耐溶剤性及び金属密着性が低下し、ま
た30重量%を越えると、塗膜の美麗さを失なう傾向に
あり、また十分な伸度、靭性が得られない。
If the above monomer component is less than 3% by weight, crosslinking will not be sufficient and the solvent resistance and metal adhesion of the cured coating will decrease; if it exceeds 30% by weight, the coating will lose its beauty. Also, sufficient elongation and toughness cannot be obtained.

また囚成分共重合体中の前記単量体と共重合可能なエチ
レン性不飽和化合物としては、たとえば、アクリル酸メ
チル、アクリル酸エチル、アクリル酸ノルマルブチル、
アクリル酸イソブチル、アクリル酸2−エチルヘキシル
、メタクリル酸メチル、メタクリル酸エチル、メタクリ
ル酸ノルマルブチル、メタクリル酸イソブチル、メタク
リル酸2−エチルヘキシル、メタクリル酸ラウリル、メ
タクリル酸トリデシル、スチレン、ビニルトルエン、α
−メ□チルスチレン、メタクリロニトリル、アク□\ リロニトリルなどがある。
Further, examples of ethylenically unsaturated compounds copolymerizable with the monomers in the captive component copolymer include methyl acrylate, ethyl acrylate, n-butyl acrylate,
Isobutyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, 2-ethylhexyl methacrylate, lauryl methacrylate, tridecyl methacrylate, styrene, vinyltoluene, α
- Methylstyrene, methacrylonitrile, lylonitrile, etc.

その他アクリル酸2−ヒドロキシエチル、メタクリル酸
2−ヒドロキシエチル、アクリル酸2−ヒドロキシプロ
ピル、メタクリル酸2−ヒドロキシプロピル、アクリル
酸2−ヒドロキシ−3−クロルプロピル、メタクリル酸
2−ヒドロキシ、−3−クロルプロピル、アクリル酸4
−ヒドロキシ−n−ブチル、メタクリル酸4−ヒドロキ
シーn−ブチルなどを挙げることができる。
Others 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, 2-hydroxy-3-chloropropyl acrylate, 2-hydroxy methacrylate, -3-chloro Propyl, acrylic acid 4
-hydroxy-n-butyl, 4-hydroxy-n-butyl methacrylate, and the like.

またヒドロキシアルキル基の代りに、ポリエチレングリ
コールモノアクリレート、ポリエチレングリコールモノ
メタクリレート、ポリプロピレングリコールモノメタク
リレート等を用いることもできる。
Moreover, polyethylene glycol monoacrylate, polyethylene glycol monomethacrylate, polypropylene glycol monomethacrylate, etc. can also be used instead of the hydroxyalkyl group.

前記(A)成分の共重合体の重量平均分子量は2500
〜60000好ましくは4000〜30000、ガラス
転移温度は30〜90℃好ましくは40〜80℃の範囲
にあるべきである。
The weight average molecular weight of the copolymer of component (A) is 2500.
-60,000 preferably 4,000-30,000, the glass transition temperature should be in the range of 30-90°C, preferably 40-80°C.

上記以外の範囲では何れも粉体塗料用樹脂としての兼ね
備えるべき性能を完全には充たし得ない。
Any range other than the above cannot fully satisfy the performance that a resin for powder coating should have.

例えば、重量平均分子量が2500以下では金属との密
着性が低下し、更に60000以上では高流動性の平滑
な塗膜を得る事はできない。
For example, if the weight average molecular weight is less than 2,500, the adhesion to the metal will decrease, and if it is more than 60,000, a smooth coating film with high fluidity cannot be obtained.

更にガラス転移温度が30℃以下では塗料組成物が貯蔵
中粘着固化し、塗装操作性を著るしく阻害する。
Furthermore, if the glass transition temperature is 30° C. or lower, the coating composition will stick and solidify during storage, significantly impeding coating operability.

更にガラス転移温度が90℃以上では塗膜にした場合高
光沢、平滑性を得る事が難かしい。
Furthermore, if the glass transition temperature is 90° C. or higher, it is difficult to obtain high gloss and smoothness when formed into a coating film.

前記(A)の共重合体は種々の方法でつくることができ
る。
The above copolymer (A) can be produced by various methods.

一般には重合反応を誘起するに遊離基開始剤が必要であ
る。
A free radical initiator is generally required to induce the polymerization reaction.

このような遊離基開始剤の多数のものが当業界で知られ
、過酸化ベンゾイル、過酸化ラウロイル、ターシャリ−
ブチルヒドロペルオキシド、アセチルシクロヘキサンス
ルホニルペルオキシド、過酸化インブチロイル、ペルオ
キシジカルボン酸ジー(2−エチルヘキシル)、ペルオ
キシジカルボン酸ジイソプロピル、ペルオキシピバリン
酸ターシャリ−ブチル、過酸化デカノイル、アゾビス(
2−メチルプロピオニトリル)等がある。
A large number of such free radical initiators are known in the art, including benzoyl peroxide, lauroyl peroxide, tert.
Butyl hydroperoxide, acetylcyclohexane sulfonyl peroxide, inbutyroyl peroxide, di(2-ethylhexyl) peroxydicarboxylate, diisopropyl peroxydicarboxylate, tert-butyl peroxypivalate, decanoyl peroxide, azobis(
2-methylpropionitrile), etc.

共重合体が溶解しうる溶剤を用いて、重合を溶液中で行
なわせることが好適である。
It is preferable to carry out the polymerization in solution using a solvent in which the copolymer can be dissolved.

トルエン、ベンゼン、キシレン、ジオキサン、フタノン
(メチルエチルケトン)等が、重合に適当な溶剤である
Toluene, benzene, xylene, dioxane, phthanone (methyl ethyl ketone), etc. are suitable solvents for polymerization.

溶剤を除去するには、真空乾燥法あるいはスプレー乾燥
法を用いることができる。
A vacuum drying method or a spray drying method can be used to remove the solvent.

また、ヘキサン、オクタン、水の如き非溶剤液体を適当
な条件のもとに攪拌下注式することにより、共重合体を
沈澱せしめ取り出すことができる。
Furthermore, the copolymer can be precipitated and taken out by pouring a non-solvent liquid such as hexane, octane, or water under appropriate conditions with stirring.

このようにして得られた共重合体は、次に乾燥して揮発
性物質を3%よりも少なくすることができる。
The copolymer thus obtained can then be dried to a volatile content of less than 3%.

共重合体はまたエマルジョン重合、懸濁重合、塊状重合
あるいはそれらの適当な組合せによってもつくることが
できる。
Copolymers can also be made by emulsion polymerization, suspension polymerization, bulk polymerization, or any suitable combination thereof.

共重合体をつ(るこれらの方法では、共重合体の分子量
を所望の範囲内におさめさせるために、連鎖移動剤を必
要とすることがある。
These methods of preparing copolymers may require a chain transfer agent to keep the molecular weight of the copolymer within a desired range.

さて、本発明(B)成分のエポキシ化合物は一般的に次
に示す方法で合成される。
Now, the epoxy compound of component (B) of the present invention is generally synthesized by the following method.

すなわち(B)成分化合物はまず(1)オキシ安息香酸
とホルムアルデヒドより酸の存在下に合成される一般式 の構造を有する化合物に対し、次に(2)そのフェノー
ル性水酸基でカルボキシル基にグリシジル基を導入する
方法が最も便利な方法である。
That is, the component compound (B) is first (1) a compound having the structure of the general formula synthesized from oxybenzoic acid and formaldehyde in the presence of an acid, and then (2) a glycidyl group is added to the carboxyl group with its phenolic hydroxyl group. The most convenient method is to introduce

ここで、(1)の反応に使用されるオキシ安息香酸はサ
リチル酸、メタオキシ安息香酸、パラオキシ安息香酸で
あっていずれか1種あるいは2種以上を使用できる。
Here, the oxybenzoic acid used in the reaction (1) is salicylic acid, metaoxybenzoic acid, or paraoxybenzoic acid, and any one or two or more thereof can be used.

また(B)成分の効果を阻害しない範囲で他のフェノー
ル化合物及びアルキル置換オキシ安息香酸なども反応系
中に少量添加できる。
In addition, small amounts of other phenol compounds, alkyl-substituted oxybenzoic acids, etc. can be added to the reaction system as long as they do not impede the effect of component (B).

(1)の反応の詳細な条件については既に本発明者らに
よって明らかにされているが(特願昭48−51193
号)、又、サリチル酸を原料とする場合については文献
(Arch Pharm 245 42 )にも知られ
ている。
The detailed conditions for the reaction (1) have already been clarified by the present inventors (Japanese Patent Application No. 48-51193
No.), and the case where salicylic acid is used as a raw material is also known in the literature (Arch Pharm 245 42).

又、(2)の反応はグリシジルエーテル又は、グリシジ
ルエステルの一般的な合成方法(Handbook o
f Epoxy Re5ins 2−2ページ以後Le
e &Neville、 McGraw−Hill B
ook Co。
In addition, the reaction (2) is carried out according to the general synthesis method of glycidyl ether or glycidyl ester (Handbook o
f Epoxy Re5ins From page 2-2 Le
e & Neville, McGraw-Hill B
ook Co.

1967)が用いられる。1967) is used.

上記方法で本発明(B)成分エポキシ化合物は容易に合
成できるが、その他の方法で合成しても何らさしつかえ
ない。
Although the epoxy compound of the component (B) of the present invention can be easily synthesized by the above method, there is no problem in synthesizing it by other methods.

この(B)成分エポキシ化合物の使用量は、(N成分共
重合体100重量部に対して好ましくは2〜30重量部
の範囲で最も良い結果が得られ、2重量部未満では塗膜
の靭性、被覆金属面との接着性に劣り、又30重量部を
越えると塗膜のレベリング性が低下する傾向が見られる
The amount of the (B) component epoxy compound to be used is preferably in the range of 2 to 30 parts by weight based on 100 parts by weight of the N component copolymer, and if it is less than 2 parts by weight, the toughness of the coating film , the adhesion to the coated metal surface is poor, and if it exceeds 30 parts by weight, the leveling properties of the coating film tend to decrease.

以上からなる本発明組成物はクリヤー樹脂組成物の形で
使用できるが、一般的には必要に応じて他の添加剤、例
えば顔料、流れ調整剤、垂れ防止剤、硬化促進剤、帯電
防止剤、消泡剤、紫外線吸収剤、酸化防止剤、難燃剤、
可塑剤などを適当な方法で混合して使用できる。
The composition of the present invention consisting of the above can be used in the form of a clear resin composition, but generally other additives such as pigments, flow control agents, anti-sag agents, curing accelerators, and antistatic agents are added as necessary. , antifoaming agents, ultraviolet absorbers, antioxidants, flame retardants,
Plasticizers and the like can be mixed in an appropriate manner.

また所望ならば、本発明本来の性質を妨げない限りにお
いて他の硬化剤及び他の樹脂あるいは増量剤、補強剤と
しての無機物質、有機物質の使用が可能である。
If desired, it is possible to use other curing agents and other resins or inorganic and organic substances as fillers and reinforcing agents, as long as they do not interfere with the inherent properties of the invention.

以上の添加剤は従来公知のもので良く、例えば硬化促進
剤としては、少量のジアミノジフェニルメタン、ジアミ
ノジフェニルスルホン、フェニルジメチルアミン、2・
4・6−トリ(ジメチルアミンメチル)フェノールなど
のアミン類及びこれらのカルボン酸塩、ジシアンジアミ
ド、イミダゾール類及びイミダゾール類の金属塩、イミ
ダゾール類の有機酸又は無機酸塩、BF3の第3級アミ
ン錯塩、テトラアルキルアンモニウム塩類、ヘンセンス
ルホン酸、パラトルエンスルホン酸及びそのモルホリン
塩などのアミン塩、アジピン酸ジヒドラジド、セバシン
酸ジヒドラジド、テレフタル酸ジヒドラジドなどのポリ
カルボン酸ポリヒドラジド、超配位ケイ素化合物アミン
塩などが使用できる。
The above additives may be conventionally known ones. For example, as a curing accelerator, a small amount of diaminodiphenylmethane, diaminodiphenylsulfone, phenyldimethylamine, 2.
Amines such as 4,6-tri(dimethylaminemethyl)phenol and their carboxylates, dicyandiamide, imidazoles and metal salts of imidazoles, organic acids or inorganic acid salts of imidazoles, tertiary amine complex salts of BF3 , tetraalkylammonium salts, amine salts such as hensensulfonic acid, paratoluenesulfonic acid and its morpholine salts, polycarboxylic acid polyhydrazides such as adipic acid dihydrazide, sebacic acid dihydrazide, terephthalic acid dihydrazide, supercoordinated silicon compound amine salts etc. can be used.

添加できる他の樹脂としては、囚成分以外のアクリル樹
脂、ポリエステル樹脂、ポリシロキサン、ポリイソシア
ネート、(B)成分以外のエポキシド樹脂ポリエーテル
、アルキッド樹脂などである。
Other resins that can be added include acrylic resins, polyester resins, polysiloxanes, polyisocyanates other than the component (B), epoxide resins polyethers and alkyd resins other than the component (B).

特に囚成分以外のアクリル樹脂としては、これを構成す
る単量体として3重量%以下の不飽和カルボン酸単量体
もしくはグリシジル(メタ)アクリル酸エステル又はβ
−メチルグリシジル(メタ)アクリル酸エステルを含む
共重合体を用い、(B)成分と予じめ溶融混合すること
は望ましい。
In particular, the acrylic resin other than the prison component should contain 3% by weight or less of unsaturated carboxylic acid monomer or glycidyl (meth)acrylic ester or β
- It is desirable to use a copolymer containing methylglycidyl (meth)acrylic acid ester and melt-mix it with component (B) in advance.

他の硬化剤としては、多塩基酸、ジフェノール化合物、
オキシ安息香酸、ブロックイソシアネートなどの他モノ
エポキシド化合物、−塩基酸なども硬化密度の調整など
に少量使用できる。
Other curing agents include polybasic acids, diphenol compounds,
In addition to oxybenzoic acid and blocked isocyanate, monoepoxide compounds, -basic acids, and the like can also be used in small amounts to adjust the curing density.

これら添加剤及び本発明の各成分を用いて粉体塗料とし
て用いる方法としては(N成分共重合体が溶液重合によ
って得られる場合はその溶液に(B)成分エポキシ化合
物及び必要な添加剤を加え溶剤の存在下に混合した後溶
剤を除去し粉体化せしめる方法が用いられ、また共重合
体(A)成分を固体として取り出した場合には、ヘンシ
ェルミキサー、ボールミルなどで固体を粉砕し混合する
トライブレンド法や加熱下、高剪断力下、溶融状態で混
練した後再粉砕する溶融ブレンド法が用いられる。
As for the method of using these additives and each component of the present invention as a powder coating (if the N component copolymer is obtained by solution polymerization, add the (B) component epoxy compound and necessary additives to the solution). A method is used in which the copolymer (A) is mixed in the presence of a solvent and then the solvent is removed to form a powder.If the copolymer (A) component is taken out as a solid, the solid is pulverized and mixed using a Henschel mixer, a ball mill, etc. A tri-blend method and a melt-blend method in which the materials are kneaded in a molten state under heating and high shear and then re-pulverized are used.

得られる粉体塗料の溶融フロー性、形成される塗膜の性
能の観点からすると、樹脂中に顔料などの添加剤が混練
された状態にある溶融ブレンド法及び溶液混和法が好ま
しい。
From the viewpoint of the melt flow properties of the resulting powder coating and the performance of the coating film formed, the melt blending method and solution mixing method, in which additives such as pigments are kneaded into the resin, are preferred.

本発明の組成物も適当な条件を選定することにより、溶
融フロー性を低下させることなく粉体塗料組成物を製造
することができる。
By selecting appropriate conditions for the composition of the present invention, a powder coating composition can be produced without reducing melt flow properties.

本発明組成物は、例えば静電スプレー法の如き公知の塗
装方法により被塗物に被覆し、通常140℃〜250℃
の焼付炉で10〜60分焼付けを行ない、すぐれた耐候
性、金属密着性を実現することができる。
The composition of the present invention is coated on an object by a known coating method such as an electrostatic spraying method, and is usually applied at a temperature of 140°C to 250°C.
By baking in a baking oven for 10 to 60 minutes, excellent weather resistance and metal adhesion can be achieved.

また粉体塗料用以外の用途、例えば熱硬化型成型材料用
途にも使用でき極めて有用である。
Moreover, it can be used for applications other than powder coatings, such as thermosetting molding materials, and is extremely useful.

次に本発明の効果を実施例によって具体的に説明するが
、以下に示される実施例は本発明を制限するものではな
い。
EXAMPLES Next, the effects of the present invention will be concretely explained using Examples, but the Examples shown below do not limit the present invention.

参考例 1 本発明の(5)成分共重合体の製造方法の具体例を示す
Reference Example 1 A specific example of the method for producing the component (5) copolymer of the present invention is shown below.

スチレン 53重量部メチル
メタクリレート 15//ブチルアクリ
レート 20 〃アクリル酸
12 〃アゾビスイソブチロニトリ
ル 2 〃上記組成からなる単量体及び重合開
始剤の混合物を、110℃に加熱したトルエン溶媒10
0重量部中に徐々に滴下し全量を約1.5時間で反応さ
せ、さらに1時間加熱を続けた後、減圧に保持して溶剤
を除去し、最終的に収率95%で共重合体を得た。
Styrene 53 parts by weight Methyl methacrylate 15//Butyl acrylate 20 Acrylic acid
12 Azobisisobutyronitrile 2 A mixture of monomers and polymerization initiator having the above composition was heated to 110°C in toluene solvent 10
0 parts by weight was gradually added dropwise and the entire amount was reacted in about 1.5 hours. After continuing to heat for another 1 hour, the solvent was removed by keeping it under reduced pressure, and finally the copolymer was obtained with a yield of 95%. I got it.

前記共重合体の重量平均分子量は14000、ガラス転
移温度は73°Cであった。
The copolymer had a weight average molecular weight of 14,000 and a glass transition temperature of 73°C.

参考例 2 参考例1と同様の合成方法で下記単量体組成よりなる共
重合体を得た。
Reference Example 2 A copolymer having the following monomer composition was obtained by the same synthesis method as in Reference Example 1.

スチレン 30重量部メチル
メタクリレート 27 //エチルメタ
クリレート 15重量部ブチルアクリレー
ト 15 〃メタクリル酸
13 〃ガラス転移温度
72℃重量平均分子量 12000参
考例 3 オキシ安息香酸とホルムアルデヒドより、一般式 で示される化合物の合成法を示めす。
Styrene 30 parts by weight Methyl methacrylate 27 //Ethyl methacrylate 15 parts by weight Butyl acrylate 15 Methacrylic acid
13 Glass transition temperature
72°C Weight average molecular weight 12000 Reference Example 3 A method for synthesizing a compound represented by the general formula from oxybenzoic acid and formaldehyde will be shown.

強力な攪拌装置、還流冷却器、液滴下装置及び温度計を
そなえつげた101容量のガラスライニング反応装置に
、パラオキシ安息香酸138(1を粉砕して反応器に仕
込む。
Paraoxybenzoic acid 138 (1) is ground and charged to a 101 capacity glass-lined reactor equipped with a strong stirrer, reflux condenser, dropper and thermometer.

次に50%濃度の硫酸5に9を仕込み、130℃に加熱
し、攪拌しながら37%ホルマリン410グを30分間
で滴下装置より添加し、その後さらに3時間加熱し反応
を続げた。
Next, 9 was added to 50% sulfuric acid 5, heated to 130°C, and while stirring, 410 g of 37% formalin was added from a dropping device over 30 minutes, followed by further heating for 3 hours to continue the reaction.

反応が進行するにつれ、生成物は固形物となり上層部に
浮く。
As the reaction progresses, the product becomes a solid and floats to the top.

反応終了後、下層の硫酸水を除き、次に熱水3kgを加
えて加熱下に攪拌して洗浄を行なう。
After the reaction is completed, the lower layer of sulfuric acid water is removed, and then 3 kg of hot water is added and stirred while heating to perform washing.

このとき、固形状の生成物は下層に沈むので上澄液を除
き、再び熱水を加えて同様の洗浄操作をくり返し、洗浄
液が塩化バリウム水溶液による硫酸根試験で白濁しなく
なるまで、この操作をくりかえす。
At this time, the solid product sinks to the bottom layer, so remove the supernatant liquid, add hot water again, and repeat the same washing operation until the washing liquid does not become cloudy in the sulfuric acid root test using a barium chloride aqueous solution. Repeat.

その後、冷水を加えて冷却し塊状の固体を得た。Thereafter, cold water was added to cool the mixture to obtain a lumpy solid.

これを粉砕し水切りを十分性なった後、60℃で減圧乾
燥し、わずかに灰色を帯びた白色固体を得た。
After pulverizing this and draining it thoroughly, it was dried under reduced pressure at 60°C to obtain a slightly grayish white solid.

この固体はメチレンビスパラオキシ安息香酸を主成分と
することを確認した。
It was confirmed that this solid was mainly composed of methylene bisparaoxybenzoic acid.

参考例 4 参考例3のパラオキシ安息香酸の代りにサリチル酸を用
いて同様の反応を行ない。
Reference Example 4 The same reaction as in Reference Example 3 was carried out using salicylic acid instead of paraoxybenzoic acid.

収量1.38kgでメチレンビスサリチル酸を得た。Methylenebissalicylic acid was obtained in a yield of 1.38 kg.

参考例 5 参考例3のパラオキシ安息香酸の代りにパラオキシ安息
香酸6907、サリチル酸6407、メタオキシ安息香
酸50S’をよく粉砕混合したものを用いて同様の反応
を行ない収量1.26kgで灰白色固体を得た。
Reference Example 5 A similar reaction was carried out using a well-pulverized mixture of paraoxybenzoic acid 6907, salicylic acid 6407, and metaoxybenzoic acid 50S' instead of paraoxybenzoic acid in Reference Example 3, and a gray-white solid was obtained in a yield of 1.26 kg. .

この固体はメチレンビスパラオキシ安息香酸、メチレン
ビスサリチル酸及びを主成分とし分子量291を示す化
合物であった。
This solid was a compound containing methylenebisparaoxybenzoic acid and methylenebissalicylic acid as main components and having a molecular weight of 291.

参考例 6 本発明の(B)成分化合物の製造方法の具体例を示す。Reference example 6 A specific example of the method for producing the component (B) compound of the present invention will be shown.

参考例3で得た生成物290重量部及びエピクロルヒド
リン1850重量部を反応器中に仕込み攪拌しながら約
120℃に加熱してエピクロルヒドリンを還流させる。
290 parts by weight of the product obtained in Reference Example 3 and 1850 parts by weight of epichlorohydrin are charged into a reactor and heated to about 120° C. with stirring to reflux the epichlorohydrin.

これに400重量部の40%カセイソーダ水溶液を4時
間にわたって滴下し、滴下終了後さらに20分間反応を
つづける、その後未反応のエピクロルヒドリンを蒸留し
て除去し、残留した粗生成物をトルエン600重量部に
溶解した後不溶物を沢取し、沢液よりトルエンを減圧下
蒸発させて除いて目的のエポキシ化合物を得た。
400 parts by weight of a 40% caustic soda aqueous solution was added dropwise over 4 hours, and the reaction was continued for another 20 minutes after the dropwise addition was completed. Unreacted epichlorohydrin was then removed by distillation, and the remaining crude product was dissolved in 600 parts by weight of toluene. After dissolving, the insoluble matter was collected, and toluene was removed from the solution by evaporation under reduced pressure to obtain the desired epoxy compound.

この化合物のエポキシ当量は145であった。The epoxy equivalent weight of this compound was 145.

この生成物の主成分は次の構造であった。The main component of this product had the following structure.

参考例 7 参考例4で得た化合物を用いて参考例6と同様の方法に
よってエポキシ当量148のエポキシ化合物を得た。
Reference Example 7 Using the compound obtained in Reference Example 4, an epoxy compound having an epoxy equivalent of 148 was obtained in the same manner as in Reference Example 6.

参考例 8 参考例5で得た化合物を用いて参考例6と同様の方法に
よってエポキシ当量146のエポキシ化合物を得た。
Reference Example 8 Using the compound obtained in Reference Example 5, an epoxy compound having an epoxy equivalent of 146 was obtained in the same manner as in Reference Example 6.

実施例 1 参考例1で得られた共重合体(本発明のA成分:100
重量部、参考例6で得られたエポキシ化合物(本発明の
B成分)20重量部、顔料としてルチル型酸化チタン2
0重量部、流展剤のモダンロー(モンサンド社製)0.
2重量部を配合し、トライブレンドしたのちブラベンダ
ーミキサー(W50EC型、ベラベンダー社製)を用い
て95〜105℃で約7分間混線を行ない得られた混練
物を冷却した後、粗粉砕し次にボールミルによって微粉
砕しこれを標準ふるいの200メツシユによって篩分し
て粉体塗料を得た。
Example 1 Copolymer obtained in Reference Example 1 (component A of the present invention: 100
Parts by weight, 20 parts by weight of the epoxy compound obtained in Reference Example 6 (component B of the present invention), 2 parts by weight of rutile titanium oxide as a pigment.
0 parts by weight, Modern Rho (manufactured by Monsando) 0.
After blending 2 parts by weight and tri-blending, mixing was performed at 95 to 105°C for about 7 minutes using a Brabender mixer (W50EC type, manufactured by Verabender), and the resulting kneaded product was cooled and coarsely pulverized. Next, the powder was pulverized using a ball mill and sieved using a 200-mesh standard sieve to obtain a powder coating.

上記粉体塗料を静電粉体塗装機(スタジェットlR50
、サメス社製)により次の条件でテストパネルに吹きつ
け塗装したのち180℃で30分間焼付を行い硬化塗膜
を得た。
The above powder coating was applied using an electrostatic powder coating machine (Staget 1R50).
(manufactured by Sames) on test panels under the following conditions, and then baked at 180° C. for 30 minutes to obtain a cured coating film.

この塗膜は光沢、表面平滑性に優れ、又、鮮映性も良好
であった。
This coating film had excellent gloss and surface smoothness, and also had good image clarity.

テストパネル 耐屈曲性用・−・・・・0.3 in厚
さブリキ板 その他の試験用・・・・・・燐酸亜鉛処理0.8朋厚さ
軟鋼板 塗装条件 −6OKV電圧 75μA電流 1kg/ca吹付は空気圧 次にこの塗膜の物性測定を行なった。
Test panel For bending resistance - 0.3 inch thick tin plate For other tests - Zinc phosphate treatment 0.8 inch thick mild steel plate Painting conditions -6 OKV Voltage 75μA Current 1kg/ CA spraying was carried out using air pressure, and the physical properties of this coating film were then measured.

塗膜は高硬度と優れた靭性な有し、耐溶剤性も良好であ
った。
The coating film had high hardness and excellent toughness, and also had good solvent resistance.

すなわち、鉛筆硬度3H、エリクセン値7.5 mm、
デュポン衝撃値500 fX 172インチで35cf
rL。
That is, pencil hardness 3H, Erichsen value 7.5 mm,
Dupont impact value 500 fX 35 cf at 172 inches
rL.

耐屈曲性テスト3朋パス、エチルセルソルブアセテート
ラブ試験パスであった。
It passed the bending resistance test 3 times and passed the ethyl cell solve acetate rub test.

また、粉体塗料の貯蔵安定性試験には3CrIl径の円
筒形ガラス容器に3cfrL高さになるように粉体塗料
を入れ、これを開放状態で35℃、85%RHの雰囲気
に保った恒温恒湿槽に入れ1日間放置した後粉体の凝集
状態及び10日間放置した後の粉体を用い塗膜にしたと
きの塗面状態から判定した。
In addition, for the storage stability test of powder coatings, powder coatings were placed in a cylindrical glass container with a diameter of 3CrIl to a height of 3cfrL, and the container was kept at a constant temperature of 35℃ and 85% RH in an open state. Judgment was made from the state of agglomeration of the powder after it was left in a humidity chamber for one day and the state of the coated surface when the powder was made into a coating film after being left for 10 days.

その結果、粉体はほとんどケーキングすることなく、容
器を手で振ると粉体としてサラサラした状態を保った。
As a result, the powder remained smooth as a powder when the container was shaken by hand, with almost no caking.

又、10日放置後の粉体塗料を用いた塗膜も試験前と何
ら変化なく優れた塗膜外観(光沢、平滑性)と塗膜物性
を示した。
Moreover, the coating film using the powder coating after being left for 10 days showed no change from before the test and exhibited excellent coating film appearance (gloss, smoothness) and coating film physical properties.

このように本発明は高硬度で光沢、平滑性、物性に優れ
た塗膜、良好な粉体貯蔵安定性を与え、粉体塗料にとっ
て必要な性能を満たしたバランスの取れた組成物である
ことが分る。
As described above, the present invention is a well-balanced composition that provides a coating film with high hardness, excellent gloss, smoothness, and physical properties, and good powder storage stability, and satisfies the performance required for a powder coating. I understand.

□実施例 2.3 実施例1と同様の試験をB成分を変えて実施した。□Example 2.3 The same test as in Example 1 was conducted by changing the B component.

すなわち、実施例1において用いた参考例6のエポキシ
化合物の代りに参考例7及び8を用いその他は同様の条
件とした。
That is, Reference Examples 7 and 8 were used in place of the epoxy compound of Reference Example 6 used in Example 1, and the other conditions were the same.

得られた粉体塗料の貯蔵安定性試験、硬化塗膜の評価試
験も実施例1と同様に行なった。
The storage stability test of the obtained powder coating material and the evaluation test of the cured coating film were also conducted in the same manner as in Example 1.

その結果を表1に示す。表1から明らかなように実施例
2及び3においても実施例1と同様、優れた塗面硬度、
平滑性と物性、貯蔵安定性が良好にバランスしているこ
とが分る。
The results are shown in Table 1. As is clear from Table 1, Examples 2 and 3 also had excellent coating surface hardness, similar to Example 1.
It can be seen that smoothness, physical properties, and storage stability are well balanced.

比較例 1 本発明のB成分エポキシ化合物と比較するために実施例
1の参考例60代りにトリグリシジルイソシアヌレート
(エポキシ当量128)20重量部を用いてその他は実
施例1と同様の条件とし、又、得られた粉体塗料、硬化
塗膜の評価試験も同様の条件で行なった。
Comparative Example 1 In order to compare with the B component epoxy compound of the present invention, 20 parts by weight of triglycidyl isocyanurate (epoxy equivalent: 128) was used instead of Reference Example 60 of Example 1, and the other conditions were the same as in Example 1. Furthermore, evaluation tests of the obtained powder coating and cured coating film were conducted under the same conditions.

その結果を表1に示したが、塗膜外観は全般に光沢に乏
しくオレンジビールも目立ち、又硬度も劣る。
The results are shown in Table 1, and the appearance of the coating film was generally poor in gloss, orange beer was noticeable, and the hardness was also poor.

一方エリクセン、デュポン衝撃値、耐屈曲性は比較的良
好である。
On the other hand, Erichsen, DuPont impact value, and bending resistance are relatively good.

しかし、粉体の貯蔵安定性は極めて悪く40℃、85%
RH雰囲気下で貯蔵すると粉体が凝集しケーキングを起
している。
However, the storage stability of the powder is extremely poor at 40℃, 85%
When stored in an RH atmosphere, the powder aggregates and causes caking.

又、10日間放置した後塗料を再粉砕して塗膜化しても
平滑な塗膜は得られず貯蔵中にゲル化が進行しているも
のと推定できる。
Furthermore, even if the paint was left to stand for 10 days and then re-pulverized to form a film, a smooth paint film could not be obtained, suggesting that gelation progressed during storage.

このようにトリグリシジルイソシアヌレートは塗膜物性
的にはかなり満足できるが貯蔵安定性が悪く粉体塗料の
必要性能を満たしているとは言えない。
As described above, triglycidyl isocyanurate is quite satisfactory in terms of coating film properties, but has poor storage stability and cannot be said to satisfy the required performance of powder coatings.

比較例 2 比較例1と同様比較のためにB成分エポキシ化合物の代
りにビスフェノールA型樹脂(DER664、ダウ社製
、エポキシ当量940)20重量部を用いて実施例1と
同様の実験を行なった。
Comparative Example 2 Same as Comparative Example 1 For comparison, an experiment similar to Example 1 was conducted using 20 parts by weight of bisphenol A type resin (DER664, manufactured by Dow, epoxy equivalent: 940) instead of the B component epoxy compound. .

その結果を表1に示した。The results are shown in Table 1.

この場合、貯蔵安定性は悪くないが、塗膜性的には全く
評価に価しない程劣悪である。
In this case, the storage stability is not bad, but the coating properties are so poor that they are not worth evaluating at all.

実施例 4 参考例2で得られた共重合体(本発明のA成分100重
量部、参考例6で得られたエポキシ化合物(本発明のB
成分)22重量部、顔料としてルチル型酸化チタン25
重量部、流展剤としてモダフロー0.2 M置部、シリ
コンオイルLO50(ヘキスト社製)0,1重量部を配
合し実施例1と同様に粉体塗料を作製し、その評価試験
も実施例1と同様に行なった。
Example 4 The copolymer obtained in Reference Example 2 (100 parts by weight of component A of the present invention, the epoxy compound obtained in Reference Example 6 (component B of the present invention)
Ingredients) 22 parts by weight, 25 parts by weight of rutile titanium oxide as pigment
A powder coating was prepared in the same manner as in Example 1 by blending Modaflow 0.2 M as a spreading agent and 0.1 part by weight of silicone oil LO50 (manufactured by Hoechst), and its evaluation test was also carried out in Example 1. The same procedure as 1 was carried out.

さらに耐候性試験としてサンシャインウエザオメーター
(WE−8UN−DC型スガ試験機製)によって促進試
験を行なった。
Further, as a weather resistance test, an accelerated test was conducted using a Sunshine Weather-Ometer (WE-8UN-DC model manufactured by Suga Test Instruments).

その結果を表2に示すが、優れた貯蔵安定性、塗膜物性
、高硬度、高平滑性の塗面が得られると共に耐候性にお
いても優れていることが分る。
The results are shown in Table 2, and it can be seen that a coating surface with excellent storage stability, coating film properties, high hardness, and high smoothness was obtained, as well as excellent weather resistance.

実施例 5 実施例4のB成分化合物を参考例8で得られたエポキシ
化合物に代えて同様の実験を行なった。
Example 5 A similar experiment was conducted by replacing the B component compound of Example 4 with the epoxy compound obtained in Reference Example 8.

その結果を表2に示すように実施例4と同様優れた耐候
性と良好な物性、塗面外観及び貯蔵安定性が認められた
As shown in Table 2, as in Example 4, excellent weather resistance, good physical properties, painted surface appearance, and storage stability were observed.

比較例 3.4 実施例4.5と比較するため実施例40B成分化合物の
代りにビスフェノールA型エポキシ樹脂(DER661
、ダウ社製、エポキシ当量540)22重量部(比較例
3)及び80重量部(比較例4)を用いて実施例4と同
様の実験を行なった。
Comparative Example 3.4 For comparison with Example 4.5, bisphenol A type epoxy resin (DER661
An experiment similar to Example 4 was conducted using 22 parts by weight (Comparative Example 3) and 80 parts by weight (Comparative Example 4) of epoxy equivalent 540, manufactured by Dow Company.

その結果を表2に示すが、比較例3では物性的に全く評
価に値せず、エポキシ樹脂を増やすことにより比較例4
では物性の改良は認められた。
The results are shown in Table 2. Comparative Example 3 was not worth evaluating at all in terms of physical properties, and by increasing the amount of epoxy resin, Comparative Example 4
Improvements in physical properties were recognized.

しかし、アクリル系塗料にとって重要な耐候性について
は全く改善されなかった。
However, the weather resistance, which is important for acrylic paints, was not improved at all.

Claims (1)

【特許請求の範囲】 1 (八 ガラス転移温度30ないし90℃、重量平均
分子量2500ないし60000を有し、且つ、α・β
不飽和カルボン酸3〜30重量%と他のエチレン性不飽
和化合物97〜70重量%との共重合体に (B) 一般式 の構造を有するエポキシ化合物 を配合してなる粉体塗料用熱硬化性粉体樹脂組成物。
[Scope of Claims] 1 (8) having a glass transition temperature of 30 to 90°C, a weight average molecular weight of 2,500 to 60,000, and α and β
A thermosetting powder coating comprising a copolymer of 3 to 30% by weight of an unsaturated carboxylic acid and 97 to 70% by weight of another ethylenically unsaturated compound and (B) an epoxy compound having the structure of the general formula. powder resin composition.
JP8839475A 1975-07-21 1975-07-21 Thermosetting powder resin composition for powder coatings Expired JPS5825117B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8839475A JPS5825117B2 (en) 1975-07-21 1975-07-21 Thermosetting powder resin composition for powder coatings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8839475A JPS5825117B2 (en) 1975-07-21 1975-07-21 Thermosetting powder resin composition for powder coatings

Publications (2)

Publication Number Publication Date
JPS5212238A JPS5212238A (en) 1977-01-29
JPS5825117B2 true JPS5825117B2 (en) 1983-05-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP8839475A Expired JPS5825117B2 (en) 1975-07-21 1975-07-21 Thermosetting powder resin composition for powder coatings

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JP (1) JPS5825117B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3113244A1 (en) 2020-08-07 2022-02-11 L'oreal Capsules containing ceramide, ceramide compositions, and related cosmetic compositions
FR3113833A1 (en) 2020-09-08 2022-03-11 L'oreal COSMETIC COMPOSITION CONTAINING RETINOL

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54127439A (en) * 1978-03-27 1979-10-03 Dainippon Ink & Chem Inc Powder coating composition for slate
DE3622610A1 (en) * 1986-07-05 1988-01-14 Bayer Ag LIQUID CRYSTALLINE DIGLYCIDYL COMPOUNDS, THEIR PRODUCTION AND USE IN HARDENABLE EPOXY BLENDS
US4889890A (en) * 1987-12-30 1989-12-26 Ppg Industries, Inc. Powder coating curing system containing a beta-hydroxyalkylamide

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3113244A1 (en) 2020-08-07 2022-02-11 L'oreal Capsules containing ceramide, ceramide compositions, and related cosmetic compositions
FR3113833A1 (en) 2020-09-08 2022-03-11 L'oreal COSMETIC COMPOSITION CONTAINING RETINOL

Also Published As

Publication number Publication date
JPS5212238A (en) 1977-01-29

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