JPH0262380B2 - - Google Patents

Info

Publication number
JPH0262380B2
JPH0262380B2 JP61108516A JP10851686A JPH0262380B2 JP H0262380 B2 JPH0262380 B2 JP H0262380B2 JP 61108516 A JP61108516 A JP 61108516A JP 10851686 A JP10851686 A JP 10851686A JP H0262380 B2 JPH0262380 B2 JP H0262380B2
Authority
JP
Japan
Prior art keywords
metal
organopolysiloxane
film
mold
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
JP61108516A
Other languages
Japanese (ja)
Other versions
JPS62264934A (en
Inventor
Nobuhiko Yugawa
Yukiisa Ozaki
Chihiro Tani
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.)
Nippon Shokubai Co Ltd
Original Assignee
Nippon Shokubai Co Ltd
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 Nippon Shokubai Co Ltd filed Critical Nippon Shokubai Co Ltd
Priority to JP61108516A priority Critical patent/JPS62264934A/en
Publication of JPS62264934A publication Critical patent/JPS62264934A/en
Publication of JPH0262380B2 publication Critical patent/JPH0262380B2/ja
Granted legal-status Critical Current

Links

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、金属−軸脂複合体の製造法に関する
ものである。更に詳しくは、型を用いて金属−樹
脂複合体を製造するに際して、溶射した金属の付
着性に優れかつ該複合体の脱型が容易な金属−樹
脂複合体の製造法に関するものである。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for producing a metal-spindle resin composite. More specifically, the present invention relates to a method for producing a metal-resin composite using a mold, in which the thermally sprayed metal has excellent adhesion and the composite can be easily demolded.

(従来の技術) 樹脂成形品を型を用いて成形する際に、該型に
予め金属溶射により金属皮膜を形成し、しかる後
に樹脂成形材料を用いて金属皮膜をバツクアツプ
して金属皮膜と樹脂成形品とを一体化せしめ、次
いで脱型することにより金属皮膜と樹脂成形品と
が一体となつた金属−樹脂複合体を製造する方法
が提案されている。この方法に従えば、表面に強
固に金属層が付着した金属−樹脂複合体を簡単に
しかも寸法精度良く製造出来、樹脂成形品に耐摩
耗性、電気伝導性、耐熱性等の諸物性を付与でき
ることから非常に有用な方法であると考えられ
る。
(Prior art) When molding a resin molded product using a mold, a metal film is formed on the mold in advance by metal spraying, and then the metal film is backed up using a resin molding material to form the metal film and resin. A method has been proposed for manufacturing a metal-resin composite in which a metal film and a resin molded product are integrated by integrating the product and then demolding the product. If this method is followed, a metal-resin composite with a metal layer firmly attached to the surface can be manufactured easily and with good dimensional accuracy, and the resin molded product can be endowed with various physical properties such as wear resistance, electrical conductivity, and heat resistance. It is considered to be a very useful method because it can be done.

(発明が解決しようとする問題点) しかしながらかかる方法で金属−樹脂複合体を
製造した場合、以下の問題を生じ易い難点があ
る。すなわち、型面に対して全く離型剤を使用し
ない場合には、溶射された金属がほとんど付着し
ないというトラブルが発生しがちである。また、
既に提案されているようにポリビニルアルコール
を溶液を離型剤として塗布した後乾燥せしめ、し
かる後に金属溶射を行うようにすれば、溶射され
た金属の付着性はやや改善されるものの、溶射作
業の途中で付着した金属皮膜がはがれ落ちたり、
あるいは鏡面の型に対しては溶射された金属が付
着しにくい等の問題点を有しており、溶射された
金属の付着が良好でかつ脱型が簡単であるような
離型剤の開発が待たれているのが現状である。
(Problems to be Solved by the Invention) However, when a metal-resin composite is produced by such a method, the following problems tend to occur. That is, if no mold release agent is used at all on the mold surface, a problem tends to occur in that the sprayed metal hardly adheres to the mold surface. Also,
As has already been proposed, if a solution of polyvinyl alcohol is applied as a mold release agent and then dried, followed by metal spraying, the adhesion of the sprayed metal will be slightly improved, but the thermal spraying process will be difficult. The metal film that adhered on the way may peel off, or
Alternatively, there are problems such as the difficulty in adhesion of sprayed metal to mirror-finished molds, and it is necessary to develop a mold release agent that will allow the sprayed metal to adhere well and be easily removed from the mold. The current situation is that we are waiting.

(問題点を解決するための手段) 本発明者らはかかる現状に鑑み鋭意、研究を重
ねた結果、本発明を完成するに至つた。即ち、本
発明は、樹脂成形品を型を用いて成形する際に、
該型に予め金属溶射により金属皮膜を形成し、し
かる後に樹脂成形材料を用いて金属皮膜をバツク
アツプして金属皮膜と樹脂成形品とを一体化せし
め、次いで脱型することにより金属皮膜と樹脂成
形品とが一体となつた金属−樹脂複合体を製造す
る方法において、金属溶射に先立つて、該型の金
属を溶射する面に、 乾燥するかもしくは硬化して被膜を形成しうる
オルガノポリシロキサン(A)を必須成分として含む
液状組成物()を塗布し引き続いて被膜を形成
せしめる事を特徴とする金属−樹脂複合体の製造
法に関するものである。
(Means for Solving the Problems) In view of the current situation, the present inventors have conducted extensive research and have completed the present invention. That is, in the present invention, when molding a resin molded product using a mold,
A metal coating is formed on the mold in advance by metal spraying, then the metal coating is backed up using a resin molding material to integrate the metal coating and the resin molded product, and then the metal coating and resin molding are removed from the mold. In the method of manufacturing a metal-resin composite in which a mold is integrally formed, prior to metal spraying, an organopolysiloxane (which can be dried or hardened to form a film) is applied to the surface onto which the metal of the mold is to be sprayed. The present invention relates to a method for producing a metal-resin composite, which comprises applying a liquid composition containing A) as an essential component and subsequently forming a film.

本発明で用いられるオルガノポリシロキサン(A)
は乾燥するかもしくは硬化して被膜を形成しうる
ものである。
Organopolysiloxane (A) used in the present invention
is capable of drying or curing to form a film.

オルガノポリシロキサン(A)のうち乾燥して被膜
を形成しうるオルガノポリシロキサン(以下、オ
ルガノポリシロキサン(A−1)という。)は非
反応型固体状のオルガノポリシロキサンで、高分
子量ジフエニルポリシロキサンがもつとも好まし
い。この乾燥して被膜を形成しうるオルガノポリ
シロキサン(A−1)は該オルガノポリシロキサ
ン(A−1)を溶解しうる溶剤(B)に溶解せしめた
援状組成物()として用いる。使用できる溶剤
(B)としては、例えばベンゼン、トルエン、キシレ
ン、ヘキサン、ヘプタン、ジクロルメタン、テト
ラクロルエチレン、トリクロルエチレン、酢酸エ
チル、酢酸ブチル、メチルエチルケトン及びメチ
ルイソブチルケトン等を挙げることができ、これ
らの溶剤の1種又は2種以上の混合物を使用でき
る。
Among organopolysiloxanes (A), organopolysiloxanes that can form a film when dried (hereinafter referred to as organopolysiloxanes (A-1)) are non-reactive solid organopolysiloxanes, and are highly molecular weight diphenyl polysiloxanes. Siloxane is also preferred. This organopolysiloxane (A-1) which can form a film upon drying is used as a supporting composition (2), which is dissolved in a solvent (B) which can dissolve the organopolysiloxane (A-1). Solvents that can be used
Examples of (B) include benzene, toluene, xylene, hexane, heptane, dichloromethane, tetrachloroethylene, trichloroethylene, ethyl acetate, butyl acetate, methyl ethyl ketone, and methyl isobutyl ketone, and one of these solvents. Or a mixture of two or more types can be used.

本発明において用いられるオルガノポリシロキ
サン(A)のうち硬化して被膜を形成しうるオルガノ
ポリシロキサン(以下、オルガノポリシロキサン
(A−2)という。)は、縮合反応、付加反応もし
くは重合反応して架橋被膜を形成しうる反応型の
オルガノポリシロキサンである。このような反応
型のオルガノポリシロキサン(A−2)として
は、 脱酢酸、脱オキシム、脱アルコール等の縮合
反応によつて硬化しうる室温硬化型オルガノポ
リシロキサン 必要により縮合反応触媒を用い、加熱によつ
て脱アルコール、脱水素、脱水等の縮合反応を
して硬化しうる加熱縮合硬化型オルガノポリシ
ロキサン 必要により付加反応触媒を用い加熱によつて
ハイドロシリル化反応等の付加反応をして硬化
しうる加熱付加硬化型オルガノポリシロキサン 必要によりラジカル重合触媒を用い加熱する
か又は必要により光増感剤を用い活性エネルギ
ー線を照射して硬化しうる重合反応硬化型オル
ガノポリシロキサン 等を例示する事ができる。
Of the organopolysiloxanes (A) used in the present invention, the organopolysiloxane that can be cured to form a film (hereinafter referred to as organopolysiloxane (A-2)) has undergone a condensation reaction, an addition reaction, or a polymerization reaction. It is a reactive organopolysiloxane that can form a crosslinked film. Such a reactive organopolysiloxane (A-2) is a room-temperature curing organopolysiloxane that can be cured by a condensation reaction such as deacetic acid, deoxime, dealcoholization, etc. If necessary, a condensation reaction catalyst is used and heated. Heat condensation curing organopolysiloxane that can be cured by condensation reactions such as dealcoholization, dehydrogenation, and dehydration. Cured by heating and addition reactions such as hydrosilylation using an addition reaction catalyst if necessary. Polymerization reaction-curable organopolysiloxanes that can be cured by heating using a radical polymerization catalyst if necessary, or by irradiating active energy rays using a photosensitizer if necessary. Can be done.

特にこれらの硬化して被膜を形成しうるオルガ
ノポリシロキサン(A−2)の中でも、末端シラ
ノール基を含有するジアルキルポリシロキサンと
多官能性メチルハイドロジエンポリシロキサンと
を必須成分として成る加熱縮合硬化型オルガノポ
リシロキサンやビニル基を含有するジアルキルポ
リシロキサンと多官能性メチルハイドロジエンポ
リシロキサンとを必須成分として成る加熱付加硬
化型オルガノポリシロキサン等を用いた場合、金
属を溶射した際の金属の付着性に優れ、かつ成形
した後の金属−樹脂複合体の脱型が容易に行える
ので好ましい。
In particular, among these organopolysiloxanes (A-2) that can be cured to form a film, a heat condensation-curing type which consists of a dialkyl polysiloxane containing a terminal silanol group and a polyfunctional methylhydrodiene polysiloxane as essential components When using an organopolysiloxane or a heat-addition-curing organopolysiloxane consisting of a vinyl group-containing dialkylpolysiloxane and a polyfunctional methylhydrodiene polysiloxane as essential components, the adhesion of metal when thermally sprayed is reduced. It is preferred because it has excellent properties and the metal-resin composite can be easily demolded after molding.

硬化して被膜を形成しうるオルガノポリシロキ
サン(A−2)は硬化前において液状の場合は特
に希釈せずにそのまま液状組成物()として使
用する事ができるが、塗布する際の塗布量の調節
や塗装作業性等の面から適当な溶媒によつて希釈
しておく事が好ましい。希釈は該オルガノポリシ
ロキサン(A−2)を溶解しうる溶剤(C)に溶解す
るかもしくは乳化剤の存在下に水に分散せしめて
できる。該溶剤(C)は前記の溶剤(B)をそのまま用い
る事ができる。
If the organopolysiloxane (A-2), which can be cured to form a film, is liquid before curing, it can be used as it is as a liquid composition () without diluting it. It is preferable to dilute with a suitable solvent from the viewpoint of adjustment and painting workability. Dilution can be carried out by dissolving the organopolysiloxane (A-2) in a solvent (C) that can dissolve it, or by dispersing it in water in the presence of an emulsifier. As the solvent (C), the above-mentioned solvent (B) can be used as is.

本発明において反応型オルガノポリシロキサン
(A−2)を硬化する際、硬化促進の為に必要に
応じて公知の硬化触媒を用いる事ができる。使用
できる硬化触媒としては、例えば加熱縮合硬化型
オルガノポリシロキサンに有効な有機スズアシレ
ート系触媒、加熱付加硬化型オルガノポリシロキ
サンに有効な白金系触媒、重合反応硬化型オルガ
ノポリシロキサンに有効なベンゾイルパーオキサ
イド等のラジカル重合開始剤又はベンゾインエチ
ルエーテル等の光増感剤等を挙げる事ができる。
In the present invention, when curing the reactive organopolysiloxane (A-2), a known curing catalyst can be used as necessary to accelerate curing. Examples of curing catalysts that can be used include organotin acylate catalysts that are effective for heat-condensation-curing organopolysiloxanes, platinum-based catalysts that are effective for heat-addition-curing organopolysiloxanes, and benzoyl peroxides that are effective for polymerization reaction-curing organopolysiloxanes. Examples include radical polymerization initiators such as , and photosensitizers such as benzoin ethyl ether.

また、本発明に用いられる液状組成物()に
は必要に応じて他の添加剤を用いることができ
る。例えば剥離抵抗を大きくするための剥離コン
トロール剤等を使用することができる。
Moreover, other additives can be used in the liquid composition (2) used in the present invention, if necessary. For example, a peeling control agent or the like can be used to increase peeling resistance.

本発明の製造法において型の金属を溶射する面
にオルガノポリシロキサン(A)の被膜を形成せしめ
るには、前記液状組成物()をハケ、スポンジ
あるいはスプレー等の手段により該型面上に塗布
し、その後常温あるいは加熱下に乾燥せしめるか
又は硬化せしめることにより達成することができ
る。
In order to form a film of organopolysiloxane (A) on the surface of the mold to be thermally sprayed with metal in the manufacturing method of the present invention, the liquid composition (A) is applied onto the surface of the mold by means such as brushing, sponge or spraying. This can be achieved by subsequently drying or curing at room temperature or under heating.

(発明の効果) このようにして型面上に液状組成物()を塗
布し引き続き乾燥せしめるか又は硬化せしめてオ
ルガノポリシロキサン(A)の被膜を形成せしめた後
に該被膜上に金属溶射を行えば、溶射された金属
の付着性が良く、溶射の途中ではがれたりあるい
は脱落したりするトラブルは発生せず、良好な金
属膜を形成することが可能である。また、このよ
うにして得られた金属皮膜を樹脂成形材料でバツ
クアツプし、金属皮膜と樹脂成形品とを一体化せ
しめ、しかる後に得られた金属−樹脂複合体を型
より脱型する作業は簡単に行うことができる。
(Effect of the invention) After the liquid composition () is applied onto the mold surface in this manner and subsequently dried or cured to form a film of organopolysiloxane (A), metal spraying is performed on the film. For example, the adhesion of the thermally sprayed metal is good, and troubles such as peeling or falling off during thermal spraying do not occur, and it is possible to form a good metal film. In addition, it is easy to back up the metal film obtained in this way with a resin molding material, integrate the metal film and the resin molded product, and then remove the resulting metal-resin composite from the mold. can be done.

(実施例) 以下、実施例、比較例により本発明をさらに詳
しく説明する。なお、例中の部はすべて重量部を
示すものとする。
(Examples) Hereinafter, the present invention will be explained in more detail with reference to Examples and Comparative Examples. Note that all parts in the examples indicate parts by weight.

実施例 1 加熱縮合硬化型オルガノポリシロキサンの30重
量%キシレン溶液(トーレ・シリコーン(株)製
SRX244)100部、硬化触媒(トーレ・シリコー
ン(株)製SRX242AC)0.6部、キシレン500部を混合
して得た液状組成物()を平板状のFRP型の
表面にハケを用いて薄く塗布し、常温で30分間放
置して溶剤を蒸発せしめた後、110℃の乾燥炉で
10分間加熱し硬化せしめてオルガノポリシロキサ
ンの被膜を得た。
Example 1 30% by weight xylene solution of heat condensation curing organopolysiloxane (manufactured by Toray Silicone Co., Ltd.)
A liquid composition obtained by mixing 100 parts of SRX244), 0.6 parts of a curing catalyst (SRX242AC manufactured by Toray Silicone Co., Ltd.), and 500 parts of xylene was applied thinly to the surface of a flat FRP mold using a brush. , leave at room temperature for 30 minutes to evaporate the solvent, then dry in a drying oven at 110℃.
It was heated for 10 minutes to cure and obtain an organopolysiloxane film.

次いでアーク溶射機(米国TAFA社製、
375EFS)を用いて、このオルガノポリシロキサ
ンの被膜上に亜鉛を約100ミクロンの厚さに溶射
したところ、良好な金属皮膜を得た。次に、得た
溶射皮膜上に不飽和ポリエステル樹脂(日本触媒
化学工業(株)製、エポラツクG−773PTMY)100
部にメチルエチルケトンパーオキサイドの55%ジ
メチルフタレート溶液1.0部を添加混合した樹脂
組成物及びガラスマツト(日東紡績(株)製、MC−
450A)を用い、前記の金属皮膜上に通常の手法
に従い、ハンドレイアツプ法で約5mmの厚さに積
層し、その後常温で放置して硬化せしめた。次い
で前記金属層を硬化したFRPとともに脱型した
ところ、容易に脱型することができ、表面状態は
良好であつた。
Next, an arc spraying machine (manufactured by TAFA, USA,
Zinc was thermally sprayed onto this organopolysiloxane film to a thickness of about 100 microns using a 375EFS), and a good metal film was obtained. Next, unsaturated polyester resin (manufactured by Nippon Shokubai Chemical Co., Ltd., Eporak G-773PTMY) 100%
A resin composition prepared by adding and mixing 1.0 part of a 55% dimethyl phthalate solution of methyl ethyl ketone peroxide and glass matte (manufactured by Nitto Boseki Co., Ltd., MC-
450A), was laminated to a thickness of about 5 mm by the hand lay-up method on the metal film described above according to a conventional method, and then left at room temperature to harden. Next, when the metal layer was demolded together with the hardened FRP, it could be easily demolded and the surface condition was good.

比較例 1 実施例1で用いたのと同じ平板状のFRP型に、
液状組成物(1)を用いず直接実施例1と同様の条件
で亜鉛を溶射したところ、溶射された亜鉛が付着
しなかつた。
Comparative Example 1 In the same flat FRP mold used in Example 1,
When zinc was directly sprayed under the same conditions as in Example 1 without using the liquid composition (1), the sprayed zinc did not adhere.

実施例 2 加熱付加重合型シリコーン化合物の30重量%ト
ルエン溶液(ダウコーニング(株)製 DK Q3−
203)100部、硬化触媒(ダウコーニング(株)製FS
XK−3020)0.5部、剥離コントロール剤(ダウコ
ーニング(株)製 DK Q3−205)30部、トルエン
500部を混合して得た液状組成物(2)を実施例1と
同様にして平板状のFRP型の表面に薄く塗布し、
常温で30分放置して溶剤を蒸発せしめた後、150
℃の乾燥炉で30分間加熱し硬化せしめてオルガノ
ポリシロキサンの被膜を得た。次いで実施例1と
同様にして、このオルガノポリシロキサンの被膜
上に亜鉛を約100ミクロンの厚さに溶射したとこ
ろ、良好な金属皮膜を得た。次いで実施例1と同
様にして前記の金属皮膜上にハンドレイアツプ法
で約5mmの厚さに積層し、硬化せしめた後脱離し
たところ、容易に脱型することができ、表面状態
は良好であつた。
Example 2 30% by weight toluene solution of heat-addition polymerizable silicone compound (DK Q3- manufactured by Dow Corning Co., Ltd.)
203) 100 parts, curing catalyst (FS manufactured by Dow Corning Co., Ltd.)
XK-3020) 0.5 parts, release control agent (Dow Corning Co., Ltd. DK Q3-205) 30 parts, toluene
A liquid composition (2) obtained by mixing 500 parts was applied thinly to the surface of a flat FRP mold in the same manner as in Example 1.
After leaving it at room temperature for 30 minutes to evaporate the solvent,
The mixture was cured by heating in a drying oven at ℃ for 30 minutes to obtain an organopolysiloxane coating. Zinc was then thermally sprayed onto the organopolysiloxane coating to a thickness of about 100 microns in the same manner as in Example 1, resulting in a good metal coating. Next, in the same manner as in Example 1, it was laminated to a thickness of approximately 5 mm on the metal film by hand lay-up method, and after curing, it was removed, and it was easily removed from the mold, and the surface condition was good. It was hot.

Claims (1)

【特許請求の範囲】 1 樹脂成形品を型を用いて成形する際に、該型
に予め金属溶射により金属皮膜を形成し、しかる
後に樹脂成形材料を用いて金属皮膜をバツクアツ
プして金属皮膜と樹脂成形品とを一体化せしめ、
次いで脱型することにより金属皮膜と樹脂成形品
とが一体となつた金属−樹脂複合体を製造する方
法において、金属溶射に先立つて該型の金属を溶
射する面に、 乾燥するかもしくは硬化して被膜を形成しうる
オルガノポリシロキサン(A)を必須成分として含む
液状組成物()を塗布し引き続いて被膜を形成
せしめる事を特徴とする金属−樹脂複合体の製造
法。 2 オルガノポリシロキサン(A)が末端にシラノー
ル基を含有するジアルキルポリシロキサンと多官
能性メチルハイドロジエンポリシロキサンとから
なる反応型オルガノポリシロキサンである特許請
求の範囲第1項記載の金属−樹脂複合体の製造
法。 3 オルガノポリシロキサン(A)がビニル基を有す
るジアルキルポリシロキサンと多官能性メチルハ
イドロジエンポリシロキサンとからなる反応型オ
ルガノポリシロキサンである特許請求の範囲第1
項記載の金属−樹脂複合体の製造法。
[Scope of Claims] 1. When molding a resin molded product using a mold, a metal film is formed on the mold in advance by metal spraying, and then the metal film is backed up using a resin molding material to form a metal film. By integrating the resin molded product,
In a method for producing a metal-resin composite in which a metal coating and a resin molded product are integrated by demolding, the metal of the mold is dried or hardened on the surface to be sprayed prior to metal spraying. 1. A method for producing a metal-resin composite, which comprises applying a liquid composition containing as an essential component an organopolysiloxane (A) capable of forming a film by applying the liquid composition, and subsequently forming a film. 2. The metal-resin composite according to claim 1, wherein the organopolysiloxane (A) is a reactive organopolysiloxane consisting of a dialkylpolysiloxane containing a silanol group at the end and a polyfunctional methylhydrodiene polysiloxane. How the body is manufactured. 3. Claim 1, wherein the organopolysiloxane (A) is a reactive organopolysiloxane consisting of a dialkylpolysiloxane having a vinyl group and a polyfunctional methylhydrodiene polysiloxane.
2. Method for producing a metal-resin composite as described in Section 1.
JP61108516A 1986-05-14 1986-05-14 Manufacture of metal-resin complex Granted JPS62264934A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61108516A JPS62264934A (en) 1986-05-14 1986-05-14 Manufacture of metal-resin complex

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61108516A JPS62264934A (en) 1986-05-14 1986-05-14 Manufacture of metal-resin complex

Publications (2)

Publication Number Publication Date
JPS62264934A JPS62264934A (en) 1987-11-17
JPH0262380B2 true JPH0262380B2 (en) 1990-12-25

Family

ID=14486771

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61108516A Granted JPS62264934A (en) 1986-05-14 1986-05-14 Manufacture of metal-resin complex

Country Status (1)

Country Link
JP (1) JPS62264934A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4935474A (en) * 1972-08-09 1974-04-02
JPS54131670A (en) * 1978-04-03 1979-10-12 Takeda Chem Ind Ltd Production of resin molded article

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4935474A (en) * 1972-08-09 1974-04-02
JPS54131670A (en) * 1978-04-03 1979-10-12 Takeda Chem Ind Ltd Production of resin molded article

Also Published As

Publication number Publication date
JPS62264934A (en) 1987-11-17

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