JPS582390A - Mold release agent for reactive injection molding - Google Patents
Mold release agent for reactive injection moldingInfo
- Publication number
- JPS582390A JPS582390A JP10170281A JP10170281A JPS582390A JP S582390 A JPS582390 A JP S582390A JP 10170281 A JP10170281 A JP 10170281A JP 10170281 A JP10170281 A JP 10170281A JP S582390 A JPS582390 A JP S582390A
- Authority
- JP
- Japan
- Prior art keywords
- wax
- mold
- release agent
- mold release
- aliphatic hydrocarbon
- 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.)
- Granted
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Lubricants (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、ハンドル、パッド、アームレスト等の半硬
質ウレタン発泡体からなる成形品を反応射出成ＪしくＲ
ＩＭ成形）する際、金型のキャビテイ面に塗布して使用
する離型剤に関する。DETAILED DESCRIPTION OF THE INVENTION This invention is a method for reaction injection molding of molded products made of semi-rigid urethane foam such as handles, pads, armrests, etc.
It relates to a mold release agent that is applied to the cavity surface of a mold during IM molding.
上記Ｒ工Ｍ成形用離型剤は、一般に次のような諸性能が
要求されている。The above mold release agent for R/M molding is generally required to have the following performances.
（１）半硬質つレタン妬泡体は発泡過程を伴うため、バ
ンパ等のウレタンエラストマに比して、硬化速度が遅く
成形直後の強度が低い。このため、脱型時成形品が型に
取られた場合変形しやすくなり、つレタンエラストマ成
形用の離型剤Ｏて比してより高い離型性が要求される。(1) Since semi-rigid urethane foam involves a foaming process, it has a slow curing speed and low strength immediately after molding, compared to urethane elastomers for bumpers and the like. For this reason, when the molded product is removed from the mold, it is easily deformed, and higher mold release properties are required compared to mold release agent O for urethane elastomer molding.
（りＲ工Ｍ成形の高生産性を維持するためには、金型清
掃の回数及び時間倉少なくする必要がある。このために
は型汚れ（型積り）が少ないことが要求される。また、
高生産性を維持するために、成形品に付着した離櫨剤の
洗浄除去が容易又は不要であることが要求される。(In order to maintain high productivity in R-M molding, it is necessary to reduce the number of times and time required for mold cleaning. For this purpose, it is required that there is little mold contamination (mold buildup). ,
In order to maintain high productivity, it is required that the release agent attached to the molded product be easily or unnecessary to be removed by washing.
（り成形品の商品価値の観点から、成形品表面に艶が生
じずかつ粘着性が無いことが要求さｊる。(From the viewpoint of the commercial value of a molded product, it is required that the surface of the molded product be free from gloss and stickiness.
（り成形品の色むら防止又は耐候性向上の観点からバリ
ヤコートをする場合は、離型剤の塗布後バリヤコートを
塗布する必要があるため、バリヤフート塗料が濡れ性を
示す離型剤であることが要求される。(When applying a barrier coat to prevent color unevenness or improve weather resistance of molded products, it is necessary to apply the barrier coat after applying the mold release agent, so the barrier foot paint is a mold release agent that exhibits wettability.) This is required.
現在、Ｒ工部成形用離型剤は、各種出回っているが上記
諸性能を全て満足するような離型剤は無い。Currently, there are various mold release agents for R-section molding on the market, but there is no mold release agent that satisfies all of the above-mentioned performances.
この発明は、上記に諸性能を全て満足させることのでき
るＲ工部成形用離型剤を提供することを目的とする。An object of the present invention is to provide a mold release agent for molding an R section that can satisfy all of the above-mentioned properties.
この発明は、上記目的を、脂肪族炭化水素からなる溶剤
に対して、脂肪族炭化水素系ワックスにエステル系ワッ
クスを添加混合しグＣワックス、及びシリコーンオイル
を所定配合比で添加分散させて得るＲＩＭ成形用離型剤
により達する。This invention achieves the above object by adding and mixing an ester wax to an aliphatic hydrocarbon wax, and then adding and dispersing a C wax and a silicone oil in a predetermined blending ratio in a solvent made of an aliphatic hydrocarbon. Achieved by mold release agent for RIM molding.
以下、この発明をさらに詳細に説明する。This invention will be explained in more detail below.
ここで配合割合の「部」は「重量部」を示す。Here, "parts" in the blending ratio indicate "parts by weight."
この発明のＲ工部成形用離型剤は、下記溶剤（Ａ）１０
０部に対し、混合ワックス（ト））１．０〜３０部、シ
リコーンオイル（Ｃ） ０． ／ ２〜θＩｌｊ部が添
加分散されたものである。The mold release agent for R-section molding of this invention uses the following solvent (A) 10
0 parts, mixed wax (G)) 1.0 to 30 parts, silicone oil (C) 0. / 2 to θIlj parts are added and dispersed.
（Ａ）溶剤
脂肪族炭化水素からなる留分にＯ〜／３ｊ″Ｃのもの、
例えば工業用ガソリンを用いる。(A) a fraction consisting of solvent aliphatic hydrocarbons with O~/3j″C;
For example, use industrial gasoline.
ここで、留分が７３３ ’Ｏを超えると、塗布後の乾燥
性及び離型性が低下し、ｇｏ”ｃ未満であると離型剤が
白化しやすく石、ると々もに造膜性が低下する。なお、
Ｒ工部成形における型温はｌ１Ｏ−３０”Ｏである。If the fraction exceeds 733'O, the drying properties and mold release properties after coating will decrease, and if the fraction is less than 733'O, the mold release agent will tend to whiten, resulting in stone formation and film-forming properties. decreases.In addition,
The mold temperature in molding the R section is l1O-30''O.
に）ワックス
Ｗａ 肪族炭化水素系ワックスにエステル系ワックスが
前＠／後者＝／／／、／〜７／／の重量比で添加混合さ
れた平均分子量（混合物の平均） １０００〜／！；０
０．融点７５−１ｒ、！ｆ’ｃ１７）モノを用いるここ
で炭化水素系ワックスは、ポリエチレンワックス等のよ
うに無極性であり、離型性能を分担し、他方エステル系
のワックスはカルナ吟バワックス等のように有極性であ
り、造膜性及び金型への密着性を分担している。従って
、エステル系ワックスが炭化水素系ワツ、クスに対して
上記割合を超えると、離型性が低下する。2) Wax Wa: Average molecular weight (average of mixture) of ester wax added to aliphatic hydrocarbon wax at a weight ratio of former@/latter=///, /~7// 1000~/! ;0
0. Melting point 75-1r,! f'c17) Use of mono Here, the hydrocarbon wax is non-polar like polyethylene wax etc. and shares mold release performance, while the ester wax is polar like Karuna Ginba wax etc. , is responsible for film-forming properties and adhesion to molds. Therefore, if the ratio of the ester wax to the hydrocarbon wax exceeds the above, the mold releasability will deteriorate.
また、ワックスの融点が低いと、型積りが少くかつ離型
性も良好であるが、成形品表面に粘着性が生じたり艶が
ですぎたりして好ましくない。他方ワックスの融点が高
いと、成形品表面ｖｃは粘着性や艶が発生しにくいが、
型積りが多く、離型性が低下し、バリヤコート塗料の濡
れ性も低下する。従って、ワックス融点は、上記範囲で
あることが望ましい。Furthermore, if the melting point of the wax is low, there will be less mold buildup and the mold releasability will be good, but the surface of the molded product will become sticky or too glossy, which is not preferable. On the other hand, if the wax has a high melting point, the molded product surface VC is less likely to become sticky or glossy;
There is a lot of mold buildup, resulting in poor mold releasability and poor wettability of the barrier coating paint. Therefore, it is desirable that the wax melting point is within the above range.
ワックス濃度が高いと、型積りが多く、成形品表面の粘
着性が高くなるとともに、塗りむらや離型性のむらが生
じやすくなり、Ｉｌ型剤塗膜が白化するおそれがあり、
さらには、コスト高となる。If the wax concentration is high, there will be a lot of mold buildup, the adhesiveness of the surface of the molded product will be high, and uneven coating and mold release properties will likely occur, leading to the risk of whitening of the Il type agent coating.
Furthermore, the cost becomes high.
他方、ワックス濃度が低いと、離型性や分散安定性が低
下する。従って、上記範囲のワックス配合比が望ましい
。On the other hand, if the wax concentration is low, mold release properties and dispersion stability will decrease. Therefore, a wax blending ratio within the above range is desirable.
（Ｃ）シリコーンオイル 粘度がＩＯθ〜３！；ＯａＰのものを用いる。(C) Silicone oil Viscosity is IOθ~3! ;Use OaP.
ここでシリコーンオイル量が少ないと、離型性が低下し
、粘着性の改良効果が少なく、他方、シリコーンオイル
量が多いと、離型剤の造膜性が損なわれるとともにバリ
ヤコート塗料の濡れ性も低 ５−
下する。従って、上記範囲のシリコーンオイル配合比が
望ましい。If the amount of silicone oil is small, the mold releasability will be reduced and the effect of improving adhesion will be small. On the other hand, if the amount of silicone oil is large, the film-forming properties of the release agent will be impaired and the wettability of the barrier coating will be reduced. Also low 5- lower. Therefore, a silicone oil blending ratio within the above range is desirable.
また、シリコーンオイルの粘度が上記範囲未満では、離
型性、粘着性の改善効果が少なく、上記範囲を超えると
、粘着性が大きくなるとともにバリヤコート塗料の濡れ
性も低下する。Furthermore, if the viscosity of the silicone oil is less than the above range, the effect of improving mold releasability and adhesion will be small, and if it exceeds the above range, the adhesion will increase and the wettability of the barrier coating will also decrease.
以下、この発明の実施例を比較例とともに挙げ、この発
明の効果を確認する。Examples of the present invention will be listed below along with comparative examples to confirm the effects of the present invention.
く実施例１〜３、比較例／〜３〉
各離型剤は、第７表に示す留分の炭化水素からなる溶剤
（８）１００部に対し、それぞれ表に示す条件、配合比
のワックス日及びシリコーンオイル（０）を添加・分散
して得た。なお、溶剤（Ａ）は全て工業用ガソリンを用
い、シリコーンオイル（Ｃ）の粘度は全て／ Ｑ Ｏ、
ＯＰものを用いた。Examples 1 to 3, Comparative Examples/ to 3> Each mold release agent was prepared by adding wax under the conditions and compounding ratio shown in the table to 100 parts of a solvent (8) consisting of a hydrocarbon fraction shown in Table 7. It was obtained by adding and dispersing silicone oil (0). The solvent (A) used was industrial gasoline, and the viscosity of the silicone oil (C) was / Q O,
I used the OP one.
く試験方法〉
上記各離型剤を予め５０ ’Ｇ Ｋ加熱した吟レタンハ
ンドル成形金型に塗布した後、ポリウレタン樹脂と溶剤
、顔料からなるバリヤコート姑料ｔ−塗布して塗料と離
型剤塗膜との濡れ性な目視観察した ６−
次に、バリヤコート塗膜の乾燥後、Ｒ工Ｍ成形（成形条
件、材料温度ｉ ２ Ｊ ’０ 、吐出量；２００ｆｌ
／ ＳｅＱ 、成形圧ｉ ／ ５０ ”９ｆ／ｃｍ
、注入時間；３ＳθＣ）ｖｃより、牛硬質ウレタンを注
入発泡させて成形品を得、その成形品の■離型性、■型
汚れ、■粘着性の有無（手の握り感覚）、■外観（艶）
、■バリヤコート塗料の濡れ性全それぞれ観察しその結
果１第−表に示す。なお、試料数は各側ごとに３０個で
ある。Test method: After applying each of the above mold release agents to a ginurethane handle mold that had been heated to 50 GK in advance, a barrier coat consisting of a polyurethane resin, a solvent, and a pigment was applied to the paint and mold release agent. The wettability with the coating film was visually observed. 6- Next, after drying the barrier coat coating film, R-M molding (molding conditions, material temperature i 2 J '0, discharge rate: 200 fl
/ SeQ, molding pressure i / 50”9f/cm
, injection time; 3SθC)vc, cow hard urethane was injected and foamed to obtain a molded product, and the molded product was evaluated for ■ mold releasability, ■ mold stains, ■ presence or absence of stickiness (hand grip feeling), and ■ appearance ( gloss)
, (2) The wettability of the barrier coating paint was observed, and the results are shown in Table 1. Note that the number of samples was 30 on each side.
また、第２表の各試験項目における「○、△、×」の判
断基準は下記の如くである。Further, the criteria for determining "○, Δ, ×" in each test item in Table 2 are as follows.
（離型性）
○・・・ノックフリ１機構による離型が瞬時である（３
０シヨツト中金型に取られて変形したり欠けたりするも
のなし）。(Mold releasability) ○...Mold release is instantaneous due to the knock-free 1 mechanism (3
(Nothing deformed or chipped by the mold during the shot).
△・・−ノックアウト機構による離型に／−，２秒を髪
する（３０シヨツト中２〜３シヨツトは金型に取られて
髪形したり欠けたりする）。Δ...-Mold release by knock-out mechanism/-, 2 seconds (2 to 3 shots out of 30 are taken by the mold and cut into a hairstyle or chipped).
（型汚れ）
○・・・３０シヨツト成形後も汚れがほとんどなく、さ
らに清掃せずに成形可能。(Mold dirt) ○...There is almost no dirt after molding 30 shots, and molding is possible without further cleaning.
△・・・３０シヨツト成形後金型清掃の必要有り。△...Mold cleaning required after 30 shot molding.
×・・・３−／ｊショットで金型清掃の必要性が生じる
。×...The need for mold cleaning arises after 3-/j shots.
（粘着性） ○・・・無し、△・・・やや有り、×・・・有り。(stickiness) ○...No, △...Slightly present, ×...Present.
（外 観） ○・・・艶無し、△・・・半艶、×・・・艶有り。(exterior) ○: No gloss, △: Semi-gloss, ×: Glossy.
（バリヤコート塗料の濡れ性）
○・・・岐じき無し、×・・・はじきがあって塗膜形成
が悪い。(Wettability of barrier coat paint) ○: No repellency, ×: Repellency and poor coating film formation.
第−表の結果から、この発明のＲ工Ｍ成形用離型剤は、
離型性、外観において優れ、かつ粘着性、型汚れも少な
く、さらＫは、バリヤフート塗料の濡れ性も良好であり
、全ての諸性能を満足させることがわかる。From the results in Table 1, the mold release agent for R/M molding of this invention is as follows:
It can be seen that it has excellent mold releasability and appearance, has little tackiness and mold staining, and also has good wettability with barrier foot paints, satisfying all the performance requirements.
第１表 一〇− 第２表 ｌＯ−Table 1 10- Table 2 lO-
Claims (1)
００重量部に対［５下記各氏分が各配合比で添加分散さ
れている構成の反応射出成形用離型剤（ａ） 脂肪族炭
化水素系ワックスにエステル系ワックスか前者／後者＝
／／／／〜７．／ｌの重量比で添加混合式れた平均分子
１１１０００ Ｐ−／！００゜融点７５〜ｔり”Ｃのワ
ックス ・・・／、 ０− Ｊ、 ０重量部。 （至）粘度がｌＯＯ〜３！ＯＱＰのシリコーンオイル
・・・０． ／−〜Ｏ，！ＩＳ重量部
。[Claims] Distillation zone consisting of aliphatic hydrocarbons 0-/3! Solvent 1 at i°C
00 parts by weight of a reaction injection molding release agent (a) in which each of the following amounts is added and dispersed in various compounding ratios: aliphatic hydrocarbon wax and ester wax or former/latter =
////~7. An average molecular weight of 111,000 P-/! was added in a weight ratio of /l. 00° melting point 75-t”C wax.../, 0-J, 0 parts by weight. (To) Silicone oil with viscosity 10-3!OQP
...0. /-~O,! IS weight department.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10170281A JPS582390A (en) | 1981-06-30 | 1981-06-30 | Mold release agent for reactive injection molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10170281A JPS582390A (en) | 1981-06-30 | 1981-06-30 | Mold release agent for reactive injection molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS582390A true JPS582390A (en) | 1983-01-07 |
| JPH0159086B2 JPH0159086B2 (en) | 1989-12-14 |
Family
ID=14307642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10170281A Granted JPS582390A (en) | 1981-06-30 | 1981-06-30 | Mold release agent for reactive injection molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS582390A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6130544B1 (en) * | 2016-03-31 | 2017-05-17 | 三栄ポリウレタン株式会社 | Method for producing composite structure and release agent |
-
1981
- 1981-06-30 JP JP10170281A patent/JPS582390A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6130544B1 (en) * | 2016-03-31 | 2017-05-17 | 三栄ポリウレタン株式会社 | Method for producing composite structure and release agent |
| JP2017177748A (en) * | 2016-03-31 | 2017-10-05 | 三栄ポリウレタン株式会社 | Method for manufacturing composite structure and release agent |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0159086B2 (en) | 1989-12-14 |
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