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JPH0221406B2 - - Google Patents

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Publication number
JPH0221406B2
JPH0221406B2 JP57088525A JP8852582A JPH0221406B2 JP H0221406 B2 JPH0221406 B2 JP H0221406B2 JP 57088525 A JP57088525 A JP 57088525A JP 8852582 A JP8852582 A JP 8852582A JP H0221406 B2 JPH0221406 B2 JP H0221406B2
Authority
JP
Japan
Prior art keywords
reaction
curing agent
polyamine
epichlorohydrin
epoxy resin
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 - Lifetime
Application number
JP57088525A
Other languages
Japanese (ja)
Other versions
JPS58204022A (en
Inventor
Akira Myamoto
Katsuo Sato
Tetsushi Ichikawa
Masahiro Kurokawa
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.)
Mitsubishi Gas Chemical Co Inc
Original Assignee
Mitsubishi Gas Chemical Co Inc
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 Mitsubishi Gas Chemical Co Inc filed Critical Mitsubishi Gas Chemical Co Inc
Priority to JP8852582A priority Critical patent/JPS58204022A/en
Publication of JPS58204022A publication Critical patent/JPS58204022A/en
Publication of JPH0221406B2 publication Critical patent/JPH0221406B2/ja
Granted legal-status Critical Current

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  • Epoxy Resins (AREA)
  • Paints Or Removers (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

【発明の詳細な説明】[Detailed description of the invention]

本発明は、エポキシ樹脂用硬化剤に関するもの
である。さらに詳しくは、メタキシリレンジアミ
ンとエピクロルヒドリンとの反応によつて得られ
るポリアミン化合物を有効成分として含有するエ
ポキシ樹脂用硬化剤に関する。 従来より各種ポリアミン化合物がエポキシ樹脂
の硬化剤あるいはその原料として広く用いられて
いることはよく知られている。 その中で、代表的なポリアミン化合物として
は、脂肪族ポリアミン、例えばエチレンジアミ
ン、ジエチレントリアミン、トリエチレンテトラ
ミン、テトラエチレンペンタミン、ペンタエチレ
ンヘキサミン、ヘキサメチレンジアミン;芳香族
ポリアミン、例えばフエニレンジアミン、ジアミ
ノジフエニルメタン、ジアミノジフエニルスルホ
ン;芳香環をもつた脂肪族ポリアミン、例えばキ
シリレンジアミン;あるいは脂環式ポリアミン、
例えばイソホロンジアミン、メンタンジアミン、
ビスアミノメチルシクロヘキサンなどをあげるこ
とができる。これらのポリアミン化合物は、それ
ぞれアミノ基の反応性、すなわち活性水素に起因
する固有の特徴を有し、これらのポリアミン化合
物をそのままであるいはそれぞれのポリアミン化
合物に適した変性を加えたのち、エポキシ樹脂硬
化剤として用いられている。 これらポリアミン化合物のうち、キシリレンジ
アミン、特にメタキシリレンジアミンを主成分と
する硬化剤は低温硬化に適し、硬化が速く、その
硬化物は光沢があり、硬度が高く、耐薬品性にす
ぐれているなどの特徴を有している。しかしなが
ら、この硬化剤およびその硬化物は、大気中の炭
酸ガス吸収に起因する白化現象があり、その硬化
物はかたく可撓性がない、密着性及び耐衝撃性が
劣るなどの欠点を有している。 本発明者らは、メタキシリレンジアミンが持つ
長所を失うことなく、かつメタキシリレンジアミ
ンが持つ上記欠点を改善したエポキシ樹脂用硬化
剤を見出すべく鋭意研究の結果、メタキシリレン
ジアミンとエピクロルヒドリンとの反応におい
て、メタキシリレンジアミン6〜20モルに対し、
エピクロルヒドリン1モルを添加することによつ
て得られる一般式() (式中、nはくり返し単位の数であつて、1ま
たは2の整数を表わす。) で表わされるポリアミン化合物が、エポキシ樹脂
用硬化剤としてすぐれた性能を発揮することを見
いだして本発明に到達した。 本発明のポリアミン化合物は、メタキシリレン
ジアミンとエピクロルヒドリンとをアルカリ金属
水酸化物の存在下に反応させ、得られた反応混合
物から反応によつて生成する水とアルカリ金属塩
化物を除去することによつて得られる。メタキシ
リレンジアミンとエピクロルヒドリンとの反応モ
ル比は、通常、後者1モルに対して前者620モル
の範囲で選択される。このモル比を変えることに
よつて前記一般式中のnの値を変えることがで
き、nの値は平均値として2以下であることを意
味し、その限りにおいて式()で表わされるポ
リアミン化合物の中にnの値が2以上に相当する
化合物が含まれていてもよい。nが2以上のポリ
アミン化合物であつても硬化物の硬化特性などに
は実質的に影響はないが、粘度が高くなり、作業
上好ましくない。アルカリ金属水酸化物として
は、通常、水酸化ナトリウムか水酸化カリウムの
いずれかが用いられ、その使用量は、エピクロル
ヒドリンに対して化学量論量以上、通常は若干過
剰となる範囲で選ばれる。メタキシリレンジアミ
ンとエピクロルヒドリンとの反応時間は5時間以
内でよく、反応温度は40〜100℃の範囲で選ばれ
るが、好ましくは60℃である。上述の反応条件の
もとで反応して得られた反応混合物は、次の操作
に付され、目的とするポリアミン化合物を得る。
すなわち、反応混合物を加熱と減圧のもとで処理
して反応生成水を留去した後、反応混合物中に析
出したアルカリ金属塩化物を別し、液をさら
に加熱と減圧下で処理して過剰の未反応メタキシ
リレンジアミンを留去し、釜残物として本発明の
ポリアミン化合物を得る。 本発明のエポキシ樹脂硬化剤は、前記式()
で表わされるポリアミン化合物を有効成分として
含有していればよく、このポリアミン化合物を単
独で用いることもできるし、他のアミン化合物と
混合して用いることもできる。ここで用い得る他
のアミン化合物としては、脂肪族ポリアミン;芳
香族ポリアミン;芳香環をもつた脂肪族ポリアミ
ン;及び脂環式ポリアミンを挙げることができ、
これらは1種または2種以上を混合して用いても
よい。これらの他のアミン化合物の例示は、先の
記載を援用するが、これらのうち、特に好ましく
はメタキシリレンジアミンが挙げられる。本発明
の硬化剤において、他のアミン化合物は式()
で表わされるポリアミン化合物に対して10重量%
以下の量で用いられるのが好ましい。さらに所望
によつて、他の公知のエポキシ樹脂用硬化剤、例
えばアクリロニトリル変性ポリアミン化合物、ポ
リアミドアミン化合物、ポリアミン/エポキシ化
合物付加反応生成物、ポリアミン/フエノール化
合物/ホルムアルデヒド縮合生成物などが併用さ
れてもよい。 本発明の硬化剤を用いて硬化させる対象のエポ
キシ樹脂は、公知のものが用いられる。これらの
エポキシ樹脂は、1分子当り少くとも2個のエポ
キシ基を有し、多価アルコール、多価フエノー
ル、多価カルボン酸あるいは多価アミンなどのグ
リシジル化合物であるグリシジル型エポキシ樹脂
や非グリシジル型エポキシ樹脂である。 本発明の硬化剤とエポキシ樹脂との配合比は、
本発明の硬化剤の活性水素当量とエポキシ樹脂の
エポキシ当量との比率で配合するのが通常である
が、多少当量比がすぐれても所期の性能は十分発
揮されるので特に配合比を限定する必要はない。
硬化に際し、その用途に応じて希釈剤、充填剤、
顔料などの種々の添加剤を加えて使用することも
可能である。 本発明の硬化剤はエポキシ樹脂との相容性がよ
く、大気中の炭酸ガス吸収に起因する白化現象が
なく、これとエポキシ樹脂との硬化物は、透明性
及び光沢がよく、可撓性に富み、接着性が強力で
はくり強度が高く、耐衝撃性及び耐薬品性が良好
であるなど種々のすぐれた性能を発揮する。 以下に本発明の態様を一層明確にするために実
施例によつて説明する。 実施例 1 メタキシリレンジアミン1088gと50%濃度のカ
セイソーダ水溶液82gとを撹拌機、滴下ロート、
温度計およびコンデンサーを備えた4つ口フラス
コ中に仕込み、これに窒素雰囲気下で撹拌しなが
らエピクロルヒドリン97gを滴下した。滴下中の
反応温度は60℃に保ち、滴下終了後も同温度で2
時間反応させた。次いで、フラスコ内容物の温度
を90〜100℃に保ち、100mmHgの減圧下に反応混
合物から水を留去した。水の留去後析出した塩化
ナトリウムは別し、得られた母液を130℃に保
つて2.5mmHgの減圧下でメタキシリレンジアミン
の留去を行なつた(「生成物A」)。 得られた反応生成物を高真空蒸留にかけ、沸点
165〜170℃/4×10-3mmHgの留分を得た(「生成
物B」)。 さらに、「生成物A」100gにメタキシリレンジ
アミンを2.42g及び8.11gを添加し、それぞれ
「生成物C」及び「生成物D」を得た。 得られた硬化剤、「生成物A〜D」の性能を第
1表に示す。
The present invention relates to a curing agent for epoxy resin. More specifically, the present invention relates to a curing agent for epoxy resins containing as an active ingredient a polyamine compound obtained by a reaction between metaxylylene diamine and epichlorohydrin. It is well known that various polyamine compounds have been widely used as curing agents for epoxy resins or raw materials thereof. Among them, typical polyamine compounds include aliphatic polyamines such as ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, hexamethylenediamine; aromatic polyamines such as phenylenediamine, diaminodiphenyl Methane, diaminodiphenylsulfone; aliphatic polyamines with aromatic rings, such as xylylene diamine; or alicyclic polyamines,
For example, isophoronediamine, menthanediamine,
Examples include bisaminomethylcyclohexane. Each of these polyamine compounds has unique characteristics due to the reactivity of the amino group, that is, active hydrogen, and these polyamine compounds can be cured with epoxy resin either as they are or after adding appropriate modification to each polyamine compound. It is used as an agent. Among these polyamine compounds, curing agents mainly containing xylylene diamine, especially metaxylylene diamine, are suitable for low-temperature curing, cure quickly, and the cured product is glossy, has high hardness, and has excellent chemical resistance. It has characteristics such as: However, this curing agent and its cured product suffer from a whitening phenomenon due to the absorption of carbon dioxide gas in the atmosphere, and the cured product has drawbacks such as being hard and not flexible, and having poor adhesion and impact resistance. ing. The present inventors have conducted intensive research to find a curing agent for epoxy resins that improves the above-mentioned drawbacks of metaxylylene diamine without losing the advantages of metaxylylene diamine. In the reaction, for 6 to 20 moles of metaxylylenediamine,
General formula () obtained by adding 1 mole of epichlorohydrin (In the formula, n is the number of repeating units and represents an integer of 1 or 2.) The present invention was achieved by discovering that a polyamine compound represented by the following formula exhibits excellent performance as a curing agent for epoxy resins. did. The polyamine compound of the present invention can be obtained by reacting metaxylylene diamine and epichlorohydrin in the presence of an alkali metal hydroxide, and removing water and alkali metal chloride produced by the reaction from the resulting reaction mixture. You can get it by twisting it. The reaction molar ratio of metaxylylene diamine and epichlorohydrin is usually selected in the range of 1 mole of the latter to 620 moles of the former. By changing this molar ratio, the value of n in the above general formula can be changed, and the value of n means that the average value is 2 or less, and as long as the value of n is 2 or less, the polyamine compound represented by the formula () may include a compound in which the value of n corresponds to 2 or more. A polyamine compound in which n is 2 or more does not substantially affect the curing characteristics of the cured product, but it increases the viscosity, which is unfavorable in terms of workability. As the alkali metal hydroxide, either sodium hydroxide or potassium hydroxide is usually used, and the amount used is selected within the range of a stoichiometric amount or more, usually a slight excess, relative to epichlorohydrin. The reaction time between metaxylylene diamine and epichlorohydrin may be within 5 hours, and the reaction temperature is selected within the range of 40 to 100°C, preferably 60°C. The reaction mixture obtained by the reaction under the above reaction conditions is subjected to the following operation to obtain the desired polyamine compound.
That is, after the reaction mixture is treated under heat and reduced pressure to distill off the reaction product water, the alkali metal chloride precipitated in the reaction mixture is separated, and the liquid is further treated under heat and reduced pressure to remove the excess. The unreacted metaxylylene diamine is distilled off to obtain the polyamine compound of the present invention as a residue in the pot. The epoxy resin curing agent of the present invention has the above formula ()
It is sufficient that the polyamine compound represented by the following formula is contained as an active ingredient, and this polyamine compound can be used alone or mixed with other amine compounds. Other amine compounds that can be used here include aliphatic polyamines; aromatic polyamines; aliphatic polyamines having an aromatic ring; and alicyclic polyamines,
These may be used alone or in combination of two or more. Examples of these other amine compounds refer to the previous description, and among these, metaxylylene diamine is particularly preferred. In the curing agent of the present invention, the other amine compound has the formula ()
10% by weight based on the polyamine compound represented by
Preferably, the following amounts are used: Furthermore, if desired, other known curing agents for epoxy resins, such as acrylonitrile-modified polyamine compounds, polyamide amine compounds, polyamine/epoxy compound addition reaction products, polyamine/phenol compounds/formaldehyde condensation products, etc., may be used in combination. good. As the epoxy resin to be cured using the curing agent of the present invention, known epoxy resins can be used. These epoxy resins have at least two epoxy groups per molecule, and include glycidyl-type epoxy resins that are glycidyl compounds such as polyhydric alcohols, polyhydric phenols, polyhydric carboxylic acids, or polyhydric amines, and non-glycidyl epoxy resins. It is an epoxy resin. The compounding ratio of the curing agent and epoxy resin of the present invention is:
Usually, the ratio of the active hydrogen equivalent of the curing agent of the present invention to the epoxy equivalent of the epoxy resin is blended, but even if the equivalent ratio is slightly superior, the desired performance can be sufficiently exhibited, so the blending ratio is particularly limited. do not have to.
During curing, diluents, fillers,
It is also possible to add and use various additives such as pigments. The curing agent of the present invention has good compatibility with epoxy resins, and there is no whitening phenomenon caused by carbon dioxide absorption in the atmosphere, and the cured product of this and epoxy resin has good transparency, gloss, and flexibility. It exhibits a variety of excellent properties, including strong adhesive properties, high peeling strength, and good impact resistance and chemical resistance. EXAMPLES Below, embodiments of the present invention will be explained by way of examples in order to further clarify aspects of the present invention. Example 1 1088 g of metaxylylene diamine and 82 g of a 50% caustic soda aqueous solution were mixed using a stirrer, a dropping funnel,
The mixture was placed in a four-necked flask equipped with a thermometer and a condenser, and 97 g of epichlorohydrin was added dropwise thereto while stirring under a nitrogen atmosphere. The reaction temperature during the dropwise addition was maintained at 60℃, and the temperature was maintained at the same temperature for 2 hours after the dropwise addition.
Allowed time to react. Then, water was distilled off from the reaction mixture under reduced pressure of 100 mmHg while maintaining the temperature of the flask contents at 90-100°C. After the water was distilled off, the precipitated sodium chloride was separated, and the resulting mother liquor was kept at 130°C, and metaxylylenediamine was distilled off under a reduced pressure of 2.5 mmHg ("Product A"). The resulting reaction product is subjected to high vacuum distillation to
A fraction of 165-170° C./4×10 −3 mmHg was obtained (“Product B”). Furthermore, 2.42 g and 8.11 g of metaxylylene diamine were added to 100 g of "Product A" to obtain "Product C" and "Product D", respectively. Table 1 shows the performance of the obtained curing agents, "Products A to D".

【表】 * メタキシリレンジアミンの略
実施例 2 実施例1で調製した硬化剤、「生成物A〜D」
を用いてエポキシ樹脂の硬化物物性及び耐薬品性
試験を行なつた。 エポキシ樹脂として「エピコート#1001−X−
75」(商品名、油化シエルエポキシ株式会社製)
を用い、「生成物A〜D」をそれぞれ9phrの割合
で配合し、これを冷間圧延鋼板に200μの膜厚に
塗布し、20℃で7日間をかけて硬化したものにつ
いて硬化物物性を測定した。結果を第2表に示
し、耐薬品性試験結果は第3表に示す。
[Table] *Simplified example of metaxylylenediamine 2 Curing agent prepared in Example 1, "Products A to D"
The physical properties and chemical resistance of the cured epoxy resin were tested using this method. As an epoxy resin, “Epicote #1001-X-”
75” (product name, manufactured by Yuka Ciel Epoxy Co., Ltd.)
"Products A to D" were mixed at a ratio of 9phr each, and this was applied to a cold rolled steel plate to a film thickness of 200μ, and cured at 20℃ for 7 days.The physical properties of the cured product were then evaluated. It was measured. The results are shown in Table 2, and the chemical resistance test results are shown in Table 3.

【表】【table】

【表】【table】

【表】【table】

【表】【table】

Claims (1)

【特許請求の範囲】 1 メタキシリレンジアミンとエピクロルヒドリ
ンとの反応において、メタキシリレンジアミン6
〜20モルに対し、エピクロルヒドリン1モルを添
加することによつて得られる一般式 (式中、nはくり返し単位の数であつて、1ま
たは2の整数を表す) で表されるポリアミン化合物を有効成分として含
有するエポキシ樹脂硬化剤。
[Claims] 1. In the reaction between metaxylylene diamine and epichlorohydrin, metaxylylene diamine 6
General formula obtained by adding 1 mol of epichlorohydrin to ~20 mol (In the formula, n is the number of repeating units and represents an integer of 1 or 2.) An epoxy resin curing agent containing a polyamine compound represented by the following as an active ingredient.
JP8852582A 1982-05-25 1982-05-25 Curing agent for epoxy resin Granted JPS58204022A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8852582A JPS58204022A (en) 1982-05-25 1982-05-25 Curing agent for epoxy resin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8852582A JPS58204022A (en) 1982-05-25 1982-05-25 Curing agent for epoxy resin

Publications (2)

Publication Number Publication Date
JPS58204022A JPS58204022A (en) 1983-11-28
JPH0221406B2 true JPH0221406B2 (en) 1990-05-14

Family

ID=13945246

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8852582A Granted JPS58204022A (en) 1982-05-25 1982-05-25 Curing agent for epoxy resin

Country Status (1)

Country Link
JP (1) JPS58204022A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2013229697B2 (en) * 2012-03-09 2015-12-17 Construction Research & Technology Gmbh Amine curable epoxy resin composition

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52111999A (en) * 1976-03-17 1977-09-20 Sanyo Chem Ind Ltd Hardeners for epoxy resins

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52111999A (en) * 1976-03-17 1977-09-20 Sanyo Chem Ind Ltd Hardeners for epoxy resins

Also Published As

Publication number Publication date
JPS58204022A (en) 1983-11-28

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