JPH023685B2 - - Google Patents
Info
- Publication number
- JPH023685B2 JPH023685B2 JP55057186A JP5718680A JPH023685B2 JP H023685 B2 JPH023685 B2 JP H023685B2 JP 55057186 A JP55057186 A JP 55057186A JP 5718680 A JP5718680 A JP 5718680A JP H023685 B2 JPH023685 B2 JP H023685B2
- Authority
- JP
- Japan
- Prior art keywords
- coating film
- weight
- parts
- urethane foam
- mold
- 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
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明はモールドコート成形方法、より詳しく
は無黄変性１液型リニア−ポリウレタンを用いた
塗膜をウレタンフオームの表部に形成させる際の
塗膜組成に特徴を有するモールドコート成形方法
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention is characterized by a mold coating method, more specifically, by a coating film composition when a coating film using a non-yellowing one-component linear polyurethane is formed on the surface of a urethane foam. This invention relates to a mold coat forming method.
塗膜付ウレタンフオームは、自動車内装部品や
家具類等、極めて広範囲に利用されている。 Urethane foam with a coating film is used in an extremely wide range of applications such as automobile interior parts and furniture.
そして、かかる塗膜付ウレタンフオームを成形
する方法として代表されるものにモールドコート
成形方法がある。 A typical method for molding such a coated urethane foam is a mold coat molding method.
モールドコート成形方法は、成形型の内面に予
め塗膜を形成させた後にウレタンフオーム原液を
注入して成形するものであるが、この際、製品と
なる塗膜付ウレタンフオームが前記のような用途
に使用されることもあつて、塗膜の色としては所
望される色が自在に形成させ得るものであること
が要求される。そこで一般には、かかる場合の塗
膜として無黄変性１液型リニア−ポリウレタンが
使用される。 The mold coat molding method involves forming a coating film on the inner surface of the mold in advance and then injecting the urethane foam stock solution into the mold.In this case, the urethane foam product with the coating film is used for the above-mentioned purposes. It is also used for the purpose of coating, so it is required that the desired color can be freely formed as the color of the coating film. Therefore, a non-yellowing one-component linear polyurethane is generally used as the coating film in such cases.
ところが、無黄変性１液型リニア−ポリウレタ
ンを使用した塗膜は、耐溶剤性、特にアルコール
類によつて代表される極性溶剤に対する耐溶剤
性、に欠ける欠点を有し、溶剤に対して膨潤する
結果、塗膜中の塗料成分が浮き出たような状態と
なり色落ちする性質がある。そしてかかる性質
は、例えばアルコールを含有するヘアーリキツド
によつて色落ちするという性質は、製品となる塗
膜付ウレタンフオームの前記のような用途に照ら
して、極めて不都合である。 However, coatings using non-yellowing one-component linear polyurethane have the drawback of lacking solvent resistance, especially to polar solvents such as alcohols, and are prone to swelling when exposed to solvents. As a result, the paint components in the paint film appear to stand out, causing color fading. Such properties, such as the property that the color fades with hair liquid containing alcohol, are extremely inconvenient in light of the above-mentioned uses of the urethane foam with a coated film as a product.
そこで従来、塗膜の耐溶剤性を改善するため、
そして結果的には塗膜の色落ち性を改善するた
め、塗膜として使用される無黄変性１液型リニア
−ポリウレタン100重量部に対し、いずれも固形
分ベースで、イソシアネート類を５乃至55重量部
添加する成形方法が提供されている。 Therefore, in order to improve the solvent resistance of the coating film,
As a result, in order to improve the discoloration of the paint film, 5 to 55 parts by weight of isocyanates were added to 100 parts by weight of the non-yellowing one-component linear polyurethane used as the paint film, based on the solid content. A molding method is provided in which parts by weight are added.
ところがこの従来の成形方法には、塗膜の耐溶
剤性が改善され、したがつて塗膜の色落ち性が改
善されている反面、塗膜の破断伸び率が低下する
欠点がある。製品となる塗膜付ウレタンフオーム
の前記のような用途に照らせば、塗膜の破断伸び
率の限度を超える低下は重大な欠点である。 However, in this conventional molding method, although the solvent resistance of the coating film is improved and therefore the discoloration resistance of the coating film is improved, there is a drawback that the elongation rate at break of the coating film is reduced. In light of the above-mentioned uses of the coated urethane foam as a product, a decrease in the elongation at break of the coated film beyond the limit is a serious drawback.
本発明は、この従来の成形方法の欠点を排除す
る改善されたモールドコート成形方法を提供する
もので、その目的は、製品となる塗膜付ウレタン
フオームの前記のような用途に照らし、これが実
際に使用される際の許容範囲内において、塗膜の
耐溶剤性、すなわちその指標ともいえる塗膜の色
落ち性を改善しつつその破断伸び率を維持する点
にある。 The present invention provides an improved mold coat molding method that eliminates the drawbacks of the conventional molding method.The purpose of the present invention is to provide an improved mold coat molding method that eliminates the drawbacks of the conventional molding method. The objective is to maintain the elongation at break while improving the solvent resistance of the coating film, that is, the discoloration resistance of the coating film, which can be considered as an indicator thereof, within the allowable range when used for.
以下、本発明の構成を詳細に説明する。 Hereinafter, the configuration of the present invention will be explained in detail.
本発明者らが繰り返しの試験を重ねた結果、無
黄変性１液型リニア−ポリウレタンにイソシアネ
ート類を添加する場合、その添加量が、これらに
よつて形成される塗膜の色落ち性と破断伸び率に
対し、特徴のある相反する影響を与えることを見
い出した。 As a result of repeated tests by the present inventors, we have found that when isocyanates are added to non-yellowing one-component linear polyurethane, the amount of isocyanates added affects the discoloration and breakage of the coating film formed by them. It was found that these effects have distinctive and contradictory effects on the elongation rate.
すなわち、イソシアネート類の添加量が多くな
るにしたがつて、塗膜の色落ち性は改善される
が、逆にその破断伸び率は低下し、しかも、イソ
シアネート類の添加によるこのような相反する影
響は、いずれも固形分ベースで、無黄変性１液型
リニア−ポリウレタン100重量部に対しイソシア
ネート類５重量部以下において大きく、イソシア
ネート類をこれより多く添加しても、格別に塗膜
の色落ち性が改善されることはなく、この破断伸
び率のみが低下するだけなのである。 In other words, as the amount of isocyanates added increases, the discoloration of the coating film improves, but conversely, its elongation at break decreases; Both are based on solid content, and are large when 5 parts by weight or less of isocyanates are added to 100 parts by weight of non-yellowing one-component linear polyurethane. The properties are not improved and only the elongation at break is reduced.
第１図は、無黄変性１液型リニア−ポリウレタ
ン100重量部に対し、いずれも固形分ベースで、
各種のイソシアネート類を０〜50重量部まで順次
添加して、厚さ100μの塗膜を多数形成させ、こ
れを１ケ月後において、その色落ち性と破断伸び
率とを測定し、その平均的なものの要部を示すも
のである。図中、横軸はイソシアネート類の添加
量を、左手縦軸は色落ち性を、そして右手縦軸は
破断伸び率を各々目盛り、実線矢印が色落ち性の
結果を示し、破線矢印が破断伸び率の結果を示し
ている。 Figure 1 shows solid content based on 100 parts by weight of non-yellowing one-component linear polyurethane.
Various isocyanates were sequentially added in amounts of 0 to 50 parts by weight to form a large number of coating films with a thickness of 100μ, and after one month, the colorfastness and elongation at break were measured, and the average It shows the main part of something. In the figure, the horizontal axis shows the amount of isocyanates added, the left-hand vertical axis shows colorfastness, and the right-hand vertical axis shows the elongation at break.The solid line arrow shows the colorfastness result, and the broken line arrow shows the breakage elongation. The results are shown below.
ここに色落ち性とは、学振式摩擦色落ち試験機
により、溶剤として市販のヘアーリキツドに浸漬
した白綿布に500ｇの荷重をかけて、塗膜上を100
回往復させ、白綿布に付着した色を複数の検査員
が肉眼で判定し、その平均値をとつたもので、色
落ち性１をイソシアネート類が添加されていない
場合の塗膜に対する白綿布に付着した色の状態と
し、色落ち性５を白綿布に色が全く付着しない状
態として、この間を等分表示したものである。 Here, color fading property is measured using a Gakushin friction color fading tester by applying a load of 500 g to a white cotton cloth soaked in commercially available hair liquid as a solvent, and applying a load of 500 g to the paint film.
Multiple inspectors visually judged the color adhered to the white cotton cloth by going back and forth several times, and the average value was taken. The state in which the color is adhered is defined as the state in which the color is adhered, and the discoloration property 5 is defined as the state in which no color is adhered to the white cotton cloth, and the interval between these is expressed equally.
第１図からも明らかなように、イソシアネート
類の添加量が０〜５重量部までは順次色落ち性が
向上している。しかし、５重量部を超える付近か
ら、その向上の程度が著るしく鈍化しているのに
対して、破断伸び率は５重量部までの添加の場合
と略同程度の割合で低下している。 As is clear from FIG. 1, as the amount of isocyanate added increases from 0 to 5 parts by weight, the discoloration property gradually improves. However, when the amount exceeds 5 parts by weight, the degree of improvement slows down significantly, whereas the elongation at break decreases at approximately the same rate as when adding up to 5 parts by weight. .
一方、製品となる塗膜付ウレタンフオームの前
記したような用途に照らし、色落ち性は、イソシ
アネート類が添加されていないものに比べて明ら
かに改善されることによつて、少くも実用上問題
のない程度にまで向上されることが要求され、ま
た経験上、破断伸び率は、かかる条件下の測定値
において、実用上250％程度は要求される。 On the other hand, in light of the above-mentioned uses of the coated urethane foam that becomes the product, the color fading resistance is clearly improved compared to the product without isocyanates, so there is at least a practical problem. In addition, according to experience, the elongation at break is practically required to be about 250% when measured under such conditions.
したがつて、これらを総合的に考慮すると、イ
ソシアネート類の添加量は、無黄変性１液型リニ
ア−ポリウレタン100重量部に対し、いずれも固
形分ベースで、２乃至５重量部が最良となる。 Therefore, when considering these things comprehensively, the best amount of isocyanates to be added is 2 to 5 parts by weight, based on solid content, per 100 parts by weight of non-yellowing one-component linear polyurethane. .
そしてこの場合、イソシアネート類としては、
ｎ−ブチルイソシアネート、ｎ−プロピルイソシ
アネート等の脂肪族イソシアネート類及び、トリ
レンジイソシアネート、ジフエニルメタンジイソ
シアネート、キシレンジイソシアネート等の芳香
族イソシアネート類等が使用され得る。 In this case, the isocyanates are
Aliphatic isocyanates such as n-butyl isocyanate and n-propylisocyanate and aromatic isocyanates such as tolylene diisocyanate, diphenylmethane diisocyanate and xylene diisocyanate may be used.
かくして本発明は、成形型の内面に塗膜を形成
させた後にウレタンフオーム原液を注入して塗膜
付ウレタンフオームを成形するに当り、固形分ベ
ースで、無黄変性１液型リニア−ポリウレタン
100重量部に対して芳香族又は脂肪族のイソシア
ネート類２乃至５重量部を添加した溶液を用いて
塗膜を形成させることを要旨として構成されてい
る。 Thus, in the present invention, when a urethane foam stock solution is injected after forming a coating film on the inner surface of a mold to mold a urethane foam with a coating, a non-yellowing one-component linear polyurethane is used on a solid basis.
The gist is to form a coating film using a solution in which 2 to 5 parts by weight of an aromatic or aliphatic isocyanate is added to 100 parts by weight.
以上説明した通りであるから、本発明には、比
較的少量のイソシアネート類を一定限度で添加す
ることにより、塗膜付ウレタンフオームの実用上
許容される範囲内にて、塗膜の色落ち性を改善
し、したがつて塗膜の耐溶剤性を改善し、これと
同時に塗膜の破断伸び率を維持することができる
効果がある。 As explained above, in the present invention, by adding a relatively small amount of isocyanates within a certain limit, the discoloration of the coating film can be improved within the practically acceptable range of the urethane foam with the coating film. This has the effect of improving the solvent resistance of the coating film, and at the same time maintaining the elongation at break of the coating film.
実施例
次に示す内容組成の塗膜原液とウレタンフオー
ム原液とを使用した。Example A coating stock solution and a urethane foam stock solution having the following contents and compositions were used.
●塗膜原液
無黄変性１液型リニア−ポリウレタン溶液（商品
名MCレタン、固形分30％、関西ペイント株式会
社製） …100重量部
シンナー（商品名MCレタンシンナー、関西ペイ
ント株式会社製） …150重量部
キシレンジイソシアネート溶液（固形分30％、武
田薬品株式会社製） …3.5重量部
●ウレタンフオーム原液
シユークローズアミンポリオール（分子量100）
…60重量部
フレオン11 …28重量部
シリコン系界面活性剤 …１重量部
トリエテレンジアミン …１重量部
クルードMDI …100重量部
先ず、離型剤を塗布した成形型の内面に前記塗
膜原液を塗布する。●Coating film stock solution Non-yellowing one-component linear polyurethane solution (trade name: MC Rethane, solid content 30%, manufactured by Kansai Paint Co., Ltd.) …100 parts by weight thinner (trade name: MC Rethane Thinner, manufactured by Kansai Paint Co., Ltd.) … 150 parts by weight xylene diisocyanate solution (solid content 30%, manufactured by Takeda Pharmaceutical Co., Ltd.) ...3.5 parts by weight ●Urethane foam stock solution Sucrose amine polyol (molecular weight 100)
…60 parts by weight Freon 11…28 parts by weight Silicone surfactant…1 part by weight Trietherenediamine…1 part by weight Crude MDI…100 parts by weight First, apply the above coating stock solution to the inner surface of a mold coated with a release agent. Apply.
次に、塗膜が乾燥した後、前記ウレタンフオー
ム原液を注入し、成形型を閉じる。 Next, after the coating film has dried, the urethane foam stock solution is injected and the mold is closed.
最後に、この成形型を静置後脱型して塗膜付ウ
レタンフオームを得た。 Finally, the mold was left to stand still and then demolded to obtain a coated urethane foam.
この間の具体的成形方法は、前記塗膜原液にお
ける無黄変性１液型リニア−ポリウレタン溶液に
所定量のイソシアネート類の溶液が含まれている
点を除き、無黄変性１液型リニア−ポリウレタン
を用いる従来の一般的なモールドコート成形方法
にしたがつた。 The specific molding method during this period is to use non-yellowing one-component linear polyurethane, except that the non-yellowing one-component linear polyurethane solution in the coating film stock solution contains a predetermined amount of isocyanate solution. The conventional general mold coat molding method used was followed.
このようにして得られた塗膜付ウレタンフオー
ムの塗膜は色落ち性3.2であつた。また、前記塗
膜原液を用いて、前記と同じ条件下で厚さ100μ
の塗膜単体を形成させたが、この塗膜の破断伸び
率は330％であつた。 The coating film of the urethane foam with a coating film thus obtained had a discoloration resistance of 3.2. In addition, using the above coating film stock solution, a thickness of 100 μm was coated under the same conditions as above.
A single coating film was formed, and the elongation at break of this coating film was 330%.
第１図はイソシアネート類の添加量（横軸）に
対する色落ち性（左手縦軸）と破断伸び率（右手
縦軸）との結果を示す図である。
FIG. 1 is a diagram showing the results of discoloration (left hand vertical axis) and elongation at break (right hand vertical axis) with respect to the amount of isocyanate added (horizontal axis).
Claims (1)
ンフオーム原液を注入して塗膜付ウレタンフオー
ムを成形するに当り、固形分ベースで無黄変性１
液型リニア−ポリウレタン100重量部に対して芳
香族又は脂肪族のイソシアネート類２乃至５重量
部を添加した溶液を用いて塗膜を形成させること
を特徴とするモールドコート成形方法。1 After forming a coating film on the inner surface of the mold, injecting the urethane foam stock solution and molding the urethane foam with a coating film, the solid content is non-yellowing 1
A mold coating method comprising forming a coating film using a solution in which 2 to 5 parts by weight of aromatic or aliphatic isocyanates are added to 100 parts by weight of liquid linear polyurethane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5718680A JPS56154041A (en) | 1980-04-30 | 1980-04-30 | Molding method of mold coat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5718680A JPS56154041A (en) | 1980-04-30 | 1980-04-30 | Molding method of mold coat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56154041A JPS56154041A (en) | 1981-11-28 |
| JPH023685B2 true JPH023685B2 (en) | 1990-01-24 |
Family
ID=13048459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5718680A Granted JPS56154041A (en) | 1980-04-30 | 1980-04-30 | Molding method of mold coat |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56154041A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0328659U (en) * | 1989-07-27 | 1991-03-22 |
-
1980
- 1980-04-30 JP JP5718680A patent/JPS56154041A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0328659U (en) * | 1989-07-27 | 1991-03-22 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56154041A (en) | 1981-11-28 |
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