JPH0462011A - External mold release agent for reaction injection molding - Google Patents
External mold release agent for reaction injection moldingInfo
- Publication number
- JPH0462011A JPH0462011A JP16532590A JP16532590A JPH0462011A JP H0462011 A JPH0462011 A JP H0462011A JP 16532590 A JP16532590 A JP 16532590A JP 16532590 A JP16532590 A JP 16532590A JP H0462011 A JPH0462011 A JP H0462011A
- Authority
- JP
- Japan
- Prior art keywords
- release agent
- mold release
- injection molding
- reaction injection
- 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.)
- Pending
Links
- 239000006082 mold release agent Substances 0.000 title claims abstract description 42
- 238000010107 reaction injection moulding Methods 0.000 title claims abstract description 20
- 229920002396 Polyurea Polymers 0.000 claims abstract description 23
- 239000004814 polyurethane Substances 0.000 claims abstract description 23
- 229920003226 polyurethane urea Polymers 0.000 claims abstract description 21
- 239000004698 Polyethylene Substances 0.000 claims abstract description 5
- -1 polyethylene Polymers 0.000 claims abstract description 5
- 229920000573 polyethylene Polymers 0.000 claims abstract description 5
- 229920005989 resin Polymers 0.000 claims description 54
- 239000011347 resin Substances 0.000 claims description 54
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 claims description 9
- 239000007788 liquid Substances 0.000 abstract description 12
- 239000003054 catalyst Substances 0.000 abstract description 6
- PISLZQACAJMAIO-UHFFFAOYSA-N 2,4-diethyl-6-methylbenzene-1,3-diamine Chemical compound CCC1=CC(C)=C(N)C(CC)=C1N PISLZQACAJMAIO-UHFFFAOYSA-N 0.000 abstract description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 abstract 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 abstract 1
- 239000011550 stock solution Substances 0.000 description 19
- 239000000243 solution Substances 0.000 description 12
- 230000013011 mating Effects 0.000 description 11
- 238000000465 moulding Methods 0.000 description 8
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 229920001451 polypropylene glycol Polymers 0.000 description 4
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 description 4
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は反応射出成形用外部離型剤、特にポリウレタン
もしくはポリウレア製の樹脂成形品の反応射出成形時に
予め型部材のキャビティ面に塗布される反応射出成形用
外部離型剤に関する。Detailed Description of the Invention (Field of Industrial Application) The present invention is an external mold release agent for reaction injection molding, which is applied in advance to the cavity surface of a mold member during reaction injection molding of a resin molded product made of polyurethane or polyurea. This invention relates to an external mold release agent for reaction injection molding.
（従来の技術）
合成樹脂成形品の成形方法の一つとして、反応射出成形
が知られている。これは、樹脂原液に触媒を添加したＡ
液と、同じく樹脂原液に反応開始剤を添加したＢ液とを
混合しながら型内へ注入し、該型内で両液を反応させて
硬化させることにより、所定形状の樹脂成形品を形成す
るようにしたものである。そして、この種の方法により
樹脂成形品を成形する場合には、成形後における成形品
の離型を良好に行うために、離型剤が使用されており、
この離型剤としては、予め樹脂原液中に混入された内部
離型剤と、例えば、特開平２−３２８１６号公報に開示
されているように、樹脂原液の型内への注入前に銀型の
キャビティに予め塗布される外部離型剤とがある。(Prior Art) Reaction injection molding is known as one of the methods for molding synthetic resin molded products. This is A with a catalyst added to the resin stock solution.
A resin molded article of a predetermined shape is formed by mixing the liquid and liquid B, which is also a resin stock solution with a reaction initiator added, into a mold and allowing both liquids to react and harden in the mold. This is how it was done. When molding a resin molded product using this type of method, a mold release agent is used to ensure good release of the molded product after molding.
This mold release agent includes an internal mold release agent that is mixed in advance into the resin stock solution, and a silver mold release agent that is mixed into the resin stock solution in advance, and a silver mold release agent that is prepared before injection of the resin stock solution into the mold, as disclosed in JP-A-2-32816. There is an external mold release agent that is pre-applied to the cavity.
（発明が解決しようとする課題）
ところで、上記のような反応射出成形により樹脂成形品
を製造する場合、例えば、第４図に示すように、型部材
１を上型２と下型３および該上型２に摺動自在に設けら
れたスライドコア４とにより構成し、これらにより形成
されるキャビティ内に樹脂原液を注入してフランジａ′
を有する樹脂成形品ａを成形することがある。この場合
、第５図に拡大して示すように、キャビティ内に注入さ
れた樹脂原液が上記スライドコア４のスライド面、即ち
、該スライドコア４と上型２との合わせ面間に侵入し、
核部にバリｂが生成されることがある。そして、このよ
うな状況において、スライドコア４と上型２との合わせ
面間に予め充分に外部離型剤が塗布されていない場合に
は、樹脂成形品ａを取り出そうとしてスライドコア４を
、第４図に鎖線で示すように、スライドさせたときに、
バリｂが樹脂成形品ａより引きちぎられてスライドコア
４と上型２との合わせ面間に咬み込んだ状態となり、こ
のバリｂが、新たな樹脂原液の注入時にキャビティ内に
侵入し、樹脂成形品の表面やその内部に混ざり込んで品
質を著しく低下させることになっていた。(Problems to be Solved by the Invention) When producing a resin molded product by reaction injection molding as described above, for example, as shown in FIG. A slide core 4 is slidably provided on the upper mold 2, and a resin stock solution is injected into the cavity formed by these to form the flange a'.
A resin molded article a having the following may be molded. In this case, as shown in an enlarged view in FIG. 5, the resin stock solution injected into the cavity enters the sliding surface of the slide core 4, that is, between the mating surfaces of the slide core 4 and the upper mold 2,
Burrs b may be generated at the core. In such a situation, if the external mold release agent is not sufficiently applied between the mating surfaces of the slide core 4 and the upper mold 2 in advance, the slide core 4 may be removed when trying to take out the resin molded product a. As shown by the chain line in Figure 4, when it is slid,
The burr b is torn off from the resin molded product a and becomes stuck between the mating surfaces of the slide core 4 and the upper mold 2, and this burr b enters the cavity when a new resin stock solution is injected, and the resin molding It was supposed to get mixed into the surface or inside of the product, significantly reducing its quality.
特に、型部材に対する付着性が極めて高いポリウレタン
やポリウレア製の樹脂成形品を成形する場合に、上記の
ようにスライドコア４と上型２との合わせ面に発生した
パリが引きちぎられる傾向が一層顕著となり問題となっ
ていた。In particular, when molding resin molded products made of polyurethane or polyurea, which have extremely high adhesion to mold members, the tendency for the flakes generated on the mating surfaces of the slide core 4 and the upper mold 2 to be torn off as described above is even more pronounced. This became a problem.
そこで本発明は、反応射出成形時に使用される外部離型
剤として、特に、型部材に対する付着性が極めて高いポ
リウレタンもしくはポリウレア製の樹脂成形品の反応射
出成形時に使用される外部離型剤として離型性に富んだ
外部離型剤を提供することを目的とする。Therefore, the present invention provides an external mold release agent for use in reaction injection molding, particularly for reaction injection molding of resin molded products made of polyurethane or polyurea, which have extremely high adhesion to mold members. The purpose of the present invention is to provide an external mold release agent with excellent moldability.
（課題を解決するための手段）
上記の課題を解決するために、本発明は次のように構成
したことを特徴とする。(Means for Solving the Problems) In order to solve the above problems, the present invention is characterized by the following configuration.
即ち、ポリウレタンもしくはポリウレア製の樹脂成形品
の反応射出成形時に予め型部材のキャビティ面に塗布さ
れる反応射出成形用外部離型剤において、ポリエチレン
系ワックスおよび工業用ガソリンに１．１．１ ）リク
ロルエタンを添加したことを特徴とする。That is, in the external mold release agent for reaction injection molding that is applied in advance to the cavity surface of a mold member during reaction injection molding of a resin molded product made of polyurethane or polyurea, 1.1.1) Lichloroethane is added to polyethylene wax and industrial gasoline. It is characterized by the addition of.
上記ポリウレタンもしくはポリウレア製の樹脂成形品を
反応射出成形する場合に使用される樹脂原液としては、
例えば、Ａ液として、ポリプロピレングリコールを８４
．８重量部、ジエチルトルエンジアミン１５．０重量部
、触媒としてのジオチルチンジラウレート０．１重量部
、同じく触媒としてのトリエチレンジアミン３３．０重
量％を混入させたジプロピレングリコール溶液０．１重
量部、補強材としてのカットファイバーグラス２０．６
重量部を含有するＡ液が使用され、また、Ｂ液としては
、メチルジイソシアネー）５０．８重量部のＢ液が使用
される。The resin stock solution used when reaction injection molding the above polyurethane or polyurea resin molded products is as follows:
For example, as liquid A, use 84% polypropylene glycol.
．． 8 parts by weight, 15.0 parts by weight of diethyltoluenediamine, 0.1 part by weight of diothyltin dilaurate as a catalyst, 0.1 part by weight of a dipropylene glycol solution mixed with 33.0 parts by weight of triethylenediamine also as a catalyst, Cut fiberglass as reinforcement material 20.6
A liquid containing 50.8 parts by weight of methyl diisocyanate is used as a liquid B.
なお、Ａ液中のポリプロピレングリコールとＢ液中のメ
チルジイソシアネートとが反応して生成されるポリウレ
タンおよびＡ液中のジエチルトルエンジアミンとＢ液中
のメチルジイソシアネートとが反応して生成されるポリ
ウレアの溶解度係数（ｓｏｌｕｂｉｌｉｔｙ ｐａｒ
ａｍｅｔｅｒ；以下、単にＳＰ値と表す）が約１０．０
程度であり、また、上記外部離型剤としての１．１．１
）リクロルエタンのＳＰ値は９．４であって、上記ポ
リウレタンおよびポリウレアと１．１．１ トリクロル
エタンとのＳＰ値が極めてて近似した値とされており、
それらが非常になじみ易い状態にある。In addition, the solubility of the polyurethane produced by the reaction of the polypropylene glycol in the A solution and the methyl diisocyanate in the B solution, and the polyurea produced by the reaction of the diethyltoluenediamine in the A solution and the methyl diisocyanate in the B solution. coefficient
ameter (hereinafter simply referred to as SP value) is approximately 10.0
1.1.1 as the external mold release agent
) The SP value of trichloroethane is 9.4, and the SP values of the above polyurethane and polyurea and 1.1.1 trichloroethane are extremely similar values,
They are very familiar.
（作 用）
上記の構成によれば、樹脂原液としてのＡ液とＢ液とが
混合されて型部材内でポリウレタンとポリウレアとが生
成されることになるのであるが、これらのポリウレタン
およびポリウレアと外部離型剤中に添加された１、 １
．１ ）−リクロルエタンとのＳＰ値が極めて近似して
いることにより、それらが極めてなじみ易く、そのため
、樹脂原液の注入前に型部材のキャビティ面に予め塗布
される外部離型剤の塗布状態にむらがあるような場合に
おいても、樹脂原液が型部材内へ注入されてポリウレタ
ンとポリウレアとが生成されながらキャビティ内に拡が
っていく際に、離型剤中に添加された１゜１．１トリク
ロルエタンの作用によりワックス成分がキャビティ内の
すみずみまでに充分にゆきわたることになる。特に、型
部材としてスライドコアが使用されて該スライドコアと
型部材との合わせ面にポリウレタンおよびポリウレアが
浸入してパリが生成される場合に、そのパリの表面とス
ライドコアおよび型部材との間に外部離型剤が充分に供
給されることになり、これにより、樹脂成形品を取り出
そうとしてスライドコアを移動させた場合においても、
パリが樹脂成形品の表面より剥離することが確実に防止
されて、該パリが樹脂成形品の表面に残存することにな
る。(Function) According to the above configuration, the resin stock solutions A and B are mixed to produce polyurethane and polyurea within the mold member. 1, 1 added in external mold release agent
．． 1) - Because the SP value is extremely similar to that of dichloroethane, they are extremely compatible with each other, and as a result, there may be unevenness in the application state of the external mold release agent that is pre-applied to the cavity surface of the mold member before injection of the resin stock solution. Even in such cases, when the resin stock solution is injected into the mold member and spreads into the cavity while producing polyurethane and polyurea, the 1°1.1 trichloroethane added to the mold release agent Due to this action, the wax component is sufficiently spread to every corner of the cavity. In particular, when a slide core is used as a mold member and polyurethane and polyurea infiltrate into the mating surfaces of the slide core and the mold member to generate pads, there is a gap between the surface of the pad and the slide core and the mold member. As a result, even when the slide core is moved to take out the resin molded product, the external mold release agent is sufficiently supplied.
The separation of the paris from the surface of the resin molded article is reliably prevented, and the paris remains on the surface of the resin molded article.
なお、樹脂成形品の表面に残存したパリは型抜き後に極
めて容易に取り除くことができる。It should be noted that pars remaining on the surface of the resin molded product can be removed extremely easily after die cutting.
（実 施 例） 以下、本発明の一実施例を説明する。(Example) An embodiment of the present invention will be described below.
まず、本実施例の反応射出成形用外部離型剤が塗布され
て樹脂成形品を成形する型部材ならびにその成形品につ
いて説明すると、第１図に示すように、型部材１０は、
上型１１と下型１２および該上型１１にスライド自在に
設けられたスライドコア１３とから構成されており、第
２図に示すように、上型１１と下型１２の型締め時にス
ライドコア１３をスライドさせることにより、これらの
上型１１、下型１２およびスライドコア１３により形成
されるキャビティ内でフランジＡ′が一体的に形成され
たポリウレタンもしくはポリウレア製の樹脂成形品Ａを
成形するようになっている。First, a description will be given of the mold member coated with the external mold release agent for reaction injection molding of this example to form a resin molded product and the molded product.As shown in FIG. 1, the mold member 10 is
It is composed of an upper mold 11, a lower mold 12, and a slide core 13 that is slidably provided on the upper mold 11. As shown in FIG. 2, when the upper mold 11 and the lower mold 12 are clamped, the slide core 13 13, a polyurethane or polyurea resin molded product A having an integrally formed flange A' is molded in the cavity formed by these upper mold 11, lower mold 12, and slide core 13. It has become.
そして、上記ポリウレタンもしくはポリウレア製の樹脂
成形品を反応射出成形する場合に使用される樹脂原液と
しては、例えば、Ａ液として、ポリプロピレングリコー
ルを８４．８重量部、ジエチルトルエンジアミン１５．
０重量部、触媒としてのジオチルチンジラウレート０．
１重量部、同じく触媒としてのトリエチレンジアミン３
３．０重量％を混入させたジプロピレングリコール溶液
０．１重量部、補強材としてのカットファイバーグラス
２０、６重量部を含有するＡ液が使用され、また、Ｂ液
としては、メチルジイソシアネート５０．８重量部のＢ
液が使用される。The resin stock solution used when reaction injection molding the polyurethane or polyurea resin molded article is, for example, 84.8 parts by weight of polypropylene glycol and 15 parts by weight of diethyltoluenediamine as liquid A.
0 parts by weight, 0.0 parts by weight of diothyltin dilaurate as a catalyst.
1 part by weight, triethylenediamine 3 also as a catalyst
A solution containing 0.1 part by weight of dipropylene glycol solution mixed with 3.0% by weight and 6 parts by weight of cut fiberglass 20 and 20% by weight as a reinforcing material was used, and as a B solution, 50% by weight of methyl diisocyanate was used. .8 parts by weight of B
liquid is used.
また、上記キャビティ面に予め塗布される外部離型剤と
しては、ポリエチレン系ワックスと、工業用ガソリンと
、１．１．１ ）リクロルエタンとを添加したものが使
用される。Further, as the external mold release agent applied in advance to the cavity surface, a mixture of polyethylene wax, industrial gasoline, and (1.1.1) lychloroethane is used.
なお、Ａ液中のポリプロピレングリコールとＢ液中のメ
チルジイソシアネートとが反応して生成されるポリウレ
タンおよびＡ液中のジエチルトルエンジアミンとＢ液中
のメチルジイソシアネートとが反応して生成されるポリ
ウレアのＳＰ値が約１０．０程度であり、また、上記外
部離型剤としての１．１．１ トリクロルエタンのＳＰ
値は９．４であって、上記ポリウレタンおよびポリウレ
アと１．１．１トリクロルエタンとのＳＰ値が極めて近
似した値とされており、それらが非常になじみ易い状態
にある。In addition, SP of the polyurethane produced by the reaction of the polypropylene glycol in the A solution and the methyl diisocyanate in the B solution, and the polyurea produced by the reaction of the diethyltoluenediamine in the A solution and the methyl diisocyanate in the B solution. 1.1.1 SP of trichloroethane as the external mold release agent
The value is 9.4, which means that the SP values of the above-mentioned polyurethane and polyurea and 1.1.1 trichloroethane are extremely similar, and they are in a state where they are very compatible.
ここで、上記外部離型剤として、各成分の混合割合を変
化させた種々の外部離型剤を用意し、それぞれの離型剤
を第１図に示す型部材１０により形成されるキャビティ
面に塗布して樹脂成形品Ａを１０回づつ成形し、その場
合に、スライドコア１３と上型１１との合わせ面に生成
されるパリが、樹脂成形品Ａを取り出そうとしてスライ
ドコア１３をスライドさせたときに樹脂成形品Ａより剥
離した回数を調べた実験結果を表１に示す。Here, as the above-mentioned external mold release agent, various external mold release agents with different mixing ratios of each component are prepared, and each mold release agent is applied to the cavity surface formed by the mold member 10 shown in FIG. The resin molded product A is molded 10 times at a time, and in that case, the flakes generated on the mating surfaces of the slide core 13 and the upper mold 11 cause the slide core 13 to slide in an attempt to take out the resin molded product A. Table 1 shows the experimental results of examining the number of times the resin molded product A was peeled off when the resin molded product A was used.
なお、表中、離型剤組成の欄の数値は、それぞれ重量％
を表す。In addition, in the table, the numbers in the column of mold release agent composition are respectively weight%.
represents.
表１
（以下、余白）
上記表１の実験Ｎ０１１，６，１１．１６より明らかな
ように、１．１．１ ）−リクロルエタンを全く含まな
い従来仕様の外部離型剤の場合には、いずれもバリの剥
離回数が高くスライドコア１３と上型１１との合わせ面
に咬み込む頻度が高いことが判明した。一方、１．１．
１ トリクロルエタンを添加させた場合には、その混合
割合にかかわらず１．１．１トリクロルエタンを含まな
いものに比べていずれもバリの剥離回数が低下すること
が実験で確認された。Table 1 (Hereafter, blank space) As is clear from Experiment No. 11, 6, 11.16 in Table 1 above, in the case of the conventional external mold release agent that does not contain any 1.1.1)-lychloroethane, It was also found that the number of times the burrs were peeled off was high and the frequency of biting into the mating surface between the slide core 13 and the upper die 11 was high. On the other hand, 1.1.
It has been experimentally confirmed that when 1.1.1 trichloroethane is added, the number of burrs peeled off is reduced in all cases compared to the case where 1.1.1 trichloroethane is not included, regardless of the mixing ratio.
これは、樹脂原液としてのＡ液とＢ液とが混合されて型
部材１０により形成されるキャビティ内で生成されるポ
リウレタンおよびポリウレアと外部離型剤中に添加され
た１、 １．１ トリクロルエタンとのＳＰ値が極めて
近似していることにより、それらが極めてなじみ易く、
そのため、樹脂原液の注入前に型部材のキャビティ面に
予め塗布される１、 １．１ ）リクロルエタンを添加
した外部離型剤の塗布状態にむらがあるような場合にお
いても、樹脂原液が型部材１０内へ注入されてポリウレ
タンとポリウレアとが生成されながらキャビティ内に拡
がっていく際に、離型剤中の１．１．１ ）リクロルエ
タンの作用によりワックス成分がキャビティ１０内のす
みずみまで充分にゆきわたるためである。特に、第３図
に拡大して示すように、スライドコア１３と上型１１と
の合わせ面に樹脂原料が浸入してバリＢが生成される場
合に、そのバリＢの表面とスライドコア１３および上型
１１との間に外部離型剤Ｃが充分に供給されることにな
り、これにより、樹脂成形品Ａを取り出そうとしてスラ
イドコア１３を移動させた場合においても、該スライド
コア１３と上型１１との合せ面に咬み込んでバリＢが樹
脂成形品Ａの表面より剥離することが確実に防止されて
、該バリＢが樹脂成形品Ａの表面に残存することになる
。This consists of polyurethane and polyurea produced in the cavity formed by the mold member 10 by mixing resin stock solutions A and B, and 1, 1.1 trichloroethane added to the external mold release agent. Because their SP values are very similar, they are very easy to match,
Therefore, even if there is uneven application of an external mold release agent containing 1, 1.1) lychloroethane, which is pre-applied to the cavity surface of the mold member before injection of the resin stock solution, the resin stock solution can be applied to the mold member cavity surface. When the polyurethane and polyurea are injected into the cavity 10 and spread into the cavity while being generated, the wax component is sufficiently spread to every corner of the cavity 10 due to the action of 1.1.1) dichloroethane in the mold release agent. It is for the sake of passing. In particular, as shown in an enlarged view in FIG. The external mold release agent C is sufficiently supplied between the slide core 13 and the upper mold 11, so that even when the slide core 13 is moved to take out the resin molded product A, the slide core 13 and the upper mold The burr B is reliably prevented from being caught in the mating surface with the mold 11 and peeled off from the surface of the resin molded product A, and the burr B remains on the surface of the resin molded product A.
なお、樹脂成形品Ａの表面に残存したバリＢは型抜き後
に極めて容易に取り除くことができる。Incidentally, the burr B remaining on the surface of the resin molded product A can be removed extremely easily after die cutting.
このように、本実施例の１．１．１ ）リクロルエタン
を添加した外部離型剤を使用した場合には、離型性が向
上して、型部材１０に対する付着性が極めて高いポリウ
レタンもしくはポリウレア製の樹脂成形品を成形する場
合においても良好に型抜きすることができる。特に、上
記のように型部材１０としてスライドコア１３を使用す
る場合において、該スライドコア１３と上型１１との合
わせ面間にバリＢが発生し易い場合においても、そのバ
リＢの樹脂成形ｆｉＡからの剥離回数が低下することに
なって、離型性が一段と向上することになる。In this way, in 1.1.1) of this example, when an external mold release agent containing lychloroethane is used, the mold releasability is improved, and polyurethane or polyurea which has extremely high adhesion to the mold member 10 is used. Even in the case of molding a resin molded product, the molding can be performed well. In particular, when the slide core 13 is used as the mold member 10 as described above, even if burrs B are likely to occur between the mating surfaces of the slide core 13 and the upper mold 11, the resin molding fiA of the burrs B The number of times of peeling from the mold is reduced, and the mold releasability is further improved.
（発明の効果）
以上のように、本発明によれば、樹脂原液としてのＡ液
とＢ液とが混合されて型部材内で生成されるポリウレタ
ンもしくはポリウレアと外部離型剤中に添加された１、
１．１ ）リクロルエタンとのＳＰ値が極めて近似し
ていることにより、それらが極めてなじみ易く、そのた
め、樹脂原液の注入前に型部材のキャビティ面に予め塗
布される外部離型剤の塗布状態にむらがあるような場合
においても、樹脂原液が型部材内へ注入されてポリウレ
タンもしくはポリウレアが生成されなからキャビティ内
を拡がっていく際に、離型剤中に添加された１、 １．
１ ）リクロルエタンの作用によりワックス成分が型部
材内のすみずみまで充分にゆきわたることになって離型
性が向上することになる。(Effects of the Invention) As described above, according to the present invention, the polyurethane or polyurea produced in the mold member by mixing the resin stock solutions A and B and added to the external mold release agent. 1,
1.1) Because the SP values are extremely similar to that of lychloroethane, they are extremely compatible with each other, and therefore, it is difficult to apply the external mold release agent that is pre-applied to the cavity surface of the mold member before injection of the resin stock solution. Even in cases where there is unevenness, when the resin stock solution is injected into the mold member and spreads inside the cavity without producing polyurethane or polyurea, 1, 1.
1) Due to the action of lychloroethane, the wax component is sufficiently spread to every corner of the mold member, improving mold releasability.
特に、型部材としてスライドコアが使用されて該スライ
ドコアと型部材との合わせ面に樹脂原料が浸入してポリ
ウレタンもしくはポリウレアからなるバリが生成される
場合に、そのバリの表面とスライドコアおよび型部材と
の間に外部離型剤が充分に供給されることになり、これ
により、樹脂成形品を取り出そうとしてスライドコアを
移動させた場合においても、バリが樹脂成形品の表面よ
り剥離してスライドコアと型部材との合わせ面に咬み込
むことが確実に防止されることになる。In particular, when a slide core is used as a mold member and a resin raw material infiltrates the mating surfaces of the slide core and mold member and burrs made of polyurethane or polyurea are generated, the surface of the burr and the slide core and mold This means that a sufficient amount of external mold release agent is supplied between the parts and the resin molded product, so that even when the slide core is moved to take out the resin molded product, the burrs will not peel off from the surface of the resin molded product. Biting into the mating surfaces of the slide core and mold member is reliably prevented.
第１〜３図は本発明の一実施例を示すもので、第１図は
本実施例の反応射出成形用外部離型剤が塗布される型部
材の断面図、第２図は該型部材の型締め状態を示す断面
図、第３図は本実施例に係る外部離型剤の作用を説明す
る要部拡大断面図である、また、第４図は従来技術とし
て示す反応射出成形に使用される型部材の断面図、第５
図は従来における問題点を説明する要部拡大断面図であ
る。
１０・・・型部材、Ａ・・・樹脂成形品、Ｃ・・・外部
離型剤。1 to 3 show one embodiment of the present invention, FIG. 1 is a sectional view of a mold member to which an external mold release agent for reaction injection molding of this embodiment is applied, and FIG. 2 is a cross-sectional view of the mold member. FIG. 3 is an enlarged cross-sectional view of the main part to explain the action of the external mold release agent according to this example, and FIG. 4 is a conventional technique showing a mold used in reaction injection molding. 5th sectional view of the mold member to be
The figure is an enlarged cross-sectional view of the main part to explain the problems in the prior art. 10... Mold member, A... Resin molded product, C... External mold release agent.
Claims (1)
の反応射出成形時に予め型部材のキャビティ面に塗布さ
れる反応射出成形用外部離型剤であって、ポリエチレン
系ワックスおよび工業用ガソリンに１，１，１トリクロ
ルエタンを添加したことを特徴とする反応射出成形用外
部離型剤。(1) An external mold release agent for reaction injection molding that is applied in advance to the cavity surface of a mold member during reaction injection molding of a resin molded product made of polyurethane or polyurea, and is applied to polyethylene wax and industrial gasoline. An external mold release agent for reaction injection molding, characterized in that 1 trichloroethane is added thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16532590A JPH0462011A (en) | 1990-06-22 | 1990-06-22 | External mold release agent for reaction injection molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16532590A JPH0462011A (en) | 1990-06-22 | 1990-06-22 | External mold release agent for reaction injection molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0462011A true JPH0462011A (en) | 1992-02-27 |
Family
ID=15810189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16532590A Pending JPH0462011A (en) | 1990-06-22 | 1990-06-22 | External mold release agent for reaction injection molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0462011A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5815396A (en) * | 1991-08-12 | 1998-09-29 | Hitachi, Ltd. | Vacuum processing device and film forming device and method using same |
| US6171641B1 (en) | 1989-12-11 | 2001-01-09 | Hitachi, Ltd. | Vacuum processing apparatus, and a film deposition apparatus and a film deposition method both using the vacuum processing apparatus |
| KR100869092B1 (en) * | 2007-10-24 | 2008-11-17 | 신한유화(주) | External mold release agent composition of Green Tire |
| JP2022003211A (en) * | 2020-06-23 | 2022-01-11 | 株式会社永商興産 | Floor board provided with non-slip layer for use in temporary passage, and non-slip layer installation method |
-
1990
- 1990-06-22 JP JP16532590A patent/JPH0462011A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6171641B1 (en) | 1989-12-11 | 2001-01-09 | Hitachi, Ltd. | Vacuum processing apparatus, and a film deposition apparatus and a film deposition method both using the vacuum processing apparatus |
| US5815396A (en) * | 1991-08-12 | 1998-09-29 | Hitachi, Ltd. | Vacuum processing device and film forming device and method using same |
| KR100869092B1 (en) * | 2007-10-24 | 2008-11-17 | 신한유화(주) | External mold release agent composition of Green Tire |
| JP2022003211A (en) * | 2020-06-23 | 2022-01-11 | 株式会社永商興産 | Floor board provided with non-slip layer for use in temporary passage, and non-slip layer installation method |
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