JPH058208B2 - - Google Patents
Info
- Publication number
- JPH058208B2 JPH058208B2 JP57158631A JP15863182A JPH058208B2 JP H058208 B2 JPH058208 B2 JP H058208B2 JP 57158631 A JP57158631 A JP 57158631A JP 15863182 A JP15863182 A JP 15863182A JP H058208 B2 JPH058208 B2 JP H058208B2
- Authority
- JP
- Japan
- Prior art keywords
- melamine
- polyethylene glycol
- diglycidyl ether
- melamine resin
- glycol diglycidyl
- 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
Links
- 229920000877 Melamine resin Polymers 0.000 claims 6
- AOBIOSPNXBMOAT-UHFFFAOYSA-N 2-[2-(oxiran-2-ylmethoxy)ethoxymethyl]oxirane Chemical compound C1OC1COCCOCC1CO1 AOBIOSPNXBMOAT-UHFFFAOYSA-N 0.000 claims 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims 3
- 239000004640 Melamine resin Substances 0.000 claims 3
- 239000002202 Polyethylene glycol Substances 0.000 claims 3
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims 3
- 229920001223 polyethylene glycol Polymers 0.000 claims 3
- 238000004519 manufacturing process Methods 0.000 claims 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Description
この発明は耐衝撃性にすぐれたメラミン樹脂成
形材料を得させるためのメラミン樹脂の製造方法
に関する。
メラミン樹脂成形材料は汎用性に富みすぐれて
いる。しかし、耐衝撃性があまり良くないのが欠
点であつた。
この発明は、このような事情に鑑みて、耐衝撃
性の良好なメラミン樹脂成形材料を得させるため
に、メラミンとポリエチレングリコールジグリシ
ジルエーテルを、メラミンに対するポリエチレン
グリコールジグリシジルエーテルの重量比が0.20
〜0.75になるようにして反応させてなる反応物に
対して、ホルムアルデヒドを、メラミンとポリエ
チレングリコールジグリシジルエーテルのモル数
の差に対するホルムアルデヒドのモル比が2.0〜
3.0になるようにして後反応させることによりメ
ラミン樹脂を得るメラミン樹脂の製造方法を要旨
とする。以下にこれを詳しく述べる。
発明者の見出したところによれば、従来のメラ
ミン樹脂成形材料は、メラミンのトリアジン骨核
同士がメチレン結合またはメチルエーテル結合を
介して架橋を進める結果、架橋密度が高くなり硬
い成形品を作つている。すなわち、成形品の耐衝
撃性を悪くしている。トリアジン骨格間にエチレ
ングリコールというソフトセグメントを導入すれ
ば、上記のような結果の起きることが避けられ、
成形品の耐衝撃性が向上する。
このようにして、この発明にかかるメラミン樹
脂の製造方法は、樹脂製造に際して、原料として
メラミンとホルムアルデヒドのほかにポリエチレ
ングリコールジグリシジルエーテルをも用いるよ
うにしている。これら３者の配合比については、
メラミン(M)に対するポリエチレングリコールジグ
リシジルエーテル（PEGE）の重量比
（PEGE）／(M)を0.20〜0.75に選ぶとともに、メラ
ミンとポリエチレングリコールジグリシジルエー
テルのモル数の差に対するホルムアルデヒド(F)の
モル比(F)／（Ｍ−PEGE）を2.0〜3.0に選ぶこと
が必要である。メラミンに対するポリエチレング
リコールジグリシジルエーテルの重量比が0.2未
満では耐衝撃性の向上が顕著でなく、0.75を超え
るとポリエチレングリコールジグリシジルエーテ
ルがアミンの硬化作用でゲル化しやすくなる。メ
ラミンとポリエチレングリコールジグリシジルエ
ーテルのモル数の差に対するホルムアルデヒドの
モル比が2.0未満では吸水率が大きくなる傾向が
みられ、3.0を超えると架橋密度が高くなりすぎ
て再びデユポン衝撃値が低下する傾向がでてく
る。表面硬度が低下すると成形品は傷つきやすく
なる。成形品の吸水率が大きくなつても困る。こ
の発明における原料配合比は、このような点も考
慮して規定されている。
この発明の方法で得られたメラミン樹脂を使用
して成形材料を製造する際に、このメラミン樹脂
に配合されるその他の原材料は通常のものであ
り、成形材料化する方法も通常のものである。
この発明にかかるメラミ樹脂の製造方法は、上
述のようにしてメラミン樹脂を製造するため、こ
のメラミン樹脂を用いてなる成形材料は、耐衝撃
性の充分なる向上をなし得ている。
つぎに、実施例を従来例と併せて述べる。
実施例 １
メラミン126ｇ、分子量526のポリエチレングリ
コールジグリシジルエーテル18.9ｇ、水126ｇを
１の三つ口フラスコに仕込んだ後、昇温し、95
℃で２時間反応させた。次に、37％ホルマリン
156.3ｇを注加し、75〜80℃で25分間反応させた。
得られたシラツプを解砕ニーダに移し、パルプ
119ｇを少しずつ投入した。20分間の浸透解砕で
得られた浸透品を金網底のバスケツトに移し、80
℃の熱風乾燥機で処理を行なつた。得られた乾燥
品100部に、離型剤としてステアリン酸亜鉛0.6部
と、硬化剤として無水フタル酸0.04部を加え、ポ
ツトミルで粉砕し、成形材料を得た。
得られたパウダー成形材料を用いて、デユポン
衝撃、シヤルピー衝撃強さ、吸水率、そしてバー
コール硬度の各性能評価を行なつた。
実施例 ２〜12
ポリエチレングリコールジグリシジルエーテル
量、37％ホルマリン量、パルプ量、無水フタル酸
量を第１表のように変えたほかは、実施例１と同
様にして成形材料を得、同様にして性能評価を行
つた。
The present invention relates to a method for producing melamine resin for obtaining a melamine resin molding material with excellent impact resistance. Melamine resin molding materials are highly versatile and excellent. However, the drawback was that the impact resistance was not very good. In view of the above circumstances, the present invention aims to obtain a melamine resin molding material with good impact resistance by combining melamine and polyethylene glycol diglycidyl ether in such a way that the weight ratio of polyethylene glycol diglycidyl ether to melamine is 0.20.
The molar ratio of formaldehyde to the difference in the number of moles of melamine and polyethylene glycol diglycidyl ether is 2.0 to 0.75.
The gist is a method for producing melamine resin, in which melamine resin is obtained by post-reacting so as to obtain a melamine resin of 3.0. This will be explained in detail below. According to the inventor's findings, in conventional melamine resin molding materials, the triazine cores of melamine proceed to crosslink with each other via methylene bonds or methyl ether bonds, resulting in a high crosslink density and a hard molded product. There is. In other words, the impact resistance of the molded product is deteriorated. By introducing a soft segment called ethylene glycol between the triazine skeletons, the above results can be avoided.
Improves the impact resistance of molded products. In this way, the method for producing melamine resin according to the present invention uses polyethylene glycol diglycidyl ether in addition to melamine and formaldehyde as raw materials during resin production. Regarding the blending ratio of these three,
The weight ratio (PEGE)/(M) of polyethylene glycol diglycidyl ether (PEGE) to melamine (M) is selected from 0.20 to 0.75, and the mole of formaldehyde (F) is selected for the difference in the number of moles of melamine and polyethylene glycol diglycidyl ether. It is necessary to choose the ratio (F)/(M-PEGE) between 2.0 and 3.0. When the weight ratio of polyethylene glycol diglycidyl ether to melamine is less than 0.2, the improvement in impact resistance is not significant, and when it exceeds 0.75, polyethylene glycol diglycidyl ether tends to gel due to the curing action of the amine. If the molar ratio of formaldehyde to the molar difference between melamine and polyethylene glycol diglycidyl ether is less than 2.0, the water absorption rate tends to increase, and if it exceeds 3.0, the crosslinking density becomes too high and the Dupont impact value tends to decrease again. comes out. When the surface hardness decreases, the molded product becomes easily damaged. It is also a problem if the water absorption rate of the molded product increases. The blending ratio of raw materials in this invention is defined taking such points into consideration. When producing a molding material using the melamine resin obtained by the method of this invention, the other raw materials that are blended with the melamine resin are conventional ones, and the method for making it into a molding material is also a conventional one. . Since the method for producing a melamine resin according to the present invention produces the melamine resin as described above, the molding material made using this melamine resin has sufficiently improved impact resistance. Next, an example will be described together with a conventional example. Example 1 After charging 126 g of melamine, 18.9 g of polyethylene glycol diglycidyl ether with a molecular weight of 526, and 126 g of water into a three-neck flask, the temperature was raised to 95 g.
The reaction was carried out at ℃ for 2 hours. Next, 37% formalin
156.3g was added and reacted at 75-80°C for 25 minutes.
Transfer the obtained syrup to a crushing kneader and pulp
119g was added little by little. Transfer the infiltrated product obtained from 20 minutes of infiltration disintegration to a basket with a wire mesh bottom, and
The treatment was carried out in a hot air dryer at ℃. To 100 parts of the obtained dry product were added 0.6 parts of zinc stearate as a mold release agent and 0.04 parts of phthalic anhydride as a hardening agent, and the mixture was ground in a pot mill to obtain a molding material. Using the obtained powder molding material, performance evaluations were performed on DuPont impact strength, Charpey impact strength, water absorption rate, and Barcoll hardness. Examples 2 to 12 A molding material was obtained in the same manner as in Example 1, except that the amount of polyethylene glycol diglycidyl ether, the amount of 37% formalin, the amount of pulp, and the amount of phthalic anhydride were changed as shown in Table 1. We performed a performance evaluation.
【表】
従来例
メラミン126ｇ、水126ｇ、水酸化ナトリウムの
10％水溶液４c.c.、そして37％ホルマリン146ｇを
仕込み、75〜80℃で90分反応させた。得られたシ
ラツプを解砕ニーダに移し、パルプ77ｇを少しず
つ投入した。20分間の浸透解砕で得られた浸透品
を金網底のバスケツトに移し、80℃の熱風乾燥機
で処理を行なつた。得られた乾燥品100部に、離
型剤としてステアリン酸亜鉛0.6部と、硬化剤と
して無水フタル酸0.04部を加え、ポツトミルで粉
砕し、成形材料を得て、これ迄と同様の性能評価
を行なつた。
実施例および従来例の性能評価を原料配合比と
併せて示すと第２表のとおりであり、実施例はい
ずれも吸水率やバーコール硬度をあまり低下させ
ることなく、耐衝撃性の向上を図り得ている。[Table] Conventional example: 126g of melamine, 126g of water, sodium hydroxide
4 c.c. of 10% aqueous solution and 146 g of 37% formalin were charged and reacted at 75 to 80°C for 90 minutes. The obtained syrup was transferred to a crushing kneader, and 77 g of pulp was added little by little. The infiltrated product obtained by osmotic crushing for 20 minutes was transferred to a basket with a wire mesh bottom, and treated in a hot air dryer at 80°C. To 100 parts of the dried product obtained, 0.6 parts of zinc stearate as a mold release agent and 0.04 parts of phthalic anhydride as a hardening agent were added, crushed in a pot mill to obtain a molding material, and the same performance evaluation as before was carried out. I did it. Table 2 shows the performance evaluation of the Examples and Conventional Examples together with the raw material blending ratio, and the Examples show that the impact resistance can be improved without significantly lowering the water absorption rate or Barcoal hardness. ing.
Claims (1)
ジルエーテルを、メラミンに対するポリエチレン
グリコールジグリシジルエーテルの重量比が0.20
〜0.75になるようにして反応させてなる反応物に
対して、ホルムアルデヒドを、メラミンとポリエ
チレングリコールジグリシジルエーテルのモル数
の差に対するホルムアルデヒドのモル比が2.0〜
3.0になるようにして後反応させることによりメ
ラミン樹脂を得るメラミン樹脂の製造方法。1. Melamine and polyethylene glycol diglycidyl ether, the weight ratio of polyethylene glycol diglycidyl ether to melamine is 0.20.
The molar ratio of formaldehyde to the difference in the number of moles of melamine and polyethylene glycol diglycidyl ether is 2.0 to 0.75.
A method for producing melamine resin, in which melamine resin is obtained by post-reacting so as to obtain a melamine resin of 3.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15863182A JPS5947253A (en) | 1982-09-11 | 1982-09-11 | Melamine resin molding material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15863182A JPS5947253A (en) | 1982-09-11 | 1982-09-11 | Melamine resin molding material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5947253A JPS5947253A (en) | 1984-03-16 |
| JPH058208B2 true JPH058208B2 (en) | 1993-02-01 |
Family
ID=15675927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15863182A Granted JPS5947253A (en) | 1982-09-11 | 1982-09-11 | Melamine resin molding material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5947253A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0674816U (en) * | 1993-03-02 | 1994-10-21 | 矢崎総業株式会社 | Low NOx gas burner |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS543791A (en) * | 1977-06-11 | 1979-01-12 | Yoshihiko Suzuki | Automatic control escalator |
-
1982
- 1982-09-11 JP JP15863182A patent/JPS5947253A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS543791A (en) * | 1977-06-11 | 1979-01-12 | Yoshihiko Suzuki | Automatic control escalator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0674816U (en) * | 1993-03-02 | 1994-10-21 | 矢崎総業株式会社 | Low NOx gas burner |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5947253A (en) | 1984-03-16 |
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