JPH0348845B2 - - Google Patents
Info
- Publication number
- JPH0348845B2 JPH0348845B2 JP57177130A JP17713082A JPH0348845B2 JP H0348845 B2 JPH0348845 B2 JP H0348845B2 JP 57177130 A JP57177130 A JP 57177130A JP 17713082 A JP17713082 A JP 17713082A JP H0348845 B2 JPH0348845 B2 JP H0348845B2
- Authority
- JP
- Japan
- Prior art keywords
- mold release
- release agent
- rubber
- weight
- item
- 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
- 239000006082 mold release agent Substances 0.000 claims description 29
- 229920001971 elastomer Polymers 0.000 claims description 23
- 239000005060 rubber Substances 0.000 claims description 23
- 229920001577 copolymer Polymers 0.000 claims description 17
- 239000010445 mica Substances 0.000 claims description 12
- 229910052618 mica group Inorganic materials 0.000 claims description 12
- 239000000454 talc Substances 0.000 claims description 12
- 229910052623 talc Inorganic materials 0.000 claims description 12
- 239000011230 binding agent Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 8
- 229920000126 latex Polymers 0.000 claims description 7
- 229920000642 polymer Polymers 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 6
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 5
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical group C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 4
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical group CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims description 4
- 239000002270 dispersing agent Substances 0.000 claims description 4
- 239000004816 latex Substances 0.000 claims description 4
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 4
- 239000003945 anionic surfactant Substances 0.000 claims description 3
- 229920005604 random copolymer Polymers 0.000 claims description 3
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims 1
- 239000011976 maleic acid Substances 0.000 claims 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims 1
- 238000004073 vulcanization Methods 0.000 description 10
- 239000000843 powder Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- -1 etc. can be used Polymers 0.000 description 7
- 239000006185 dispersion Substances 0.000 description 5
- 238000009499 grossing Methods 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 150000008051 alkyl sulfates Chemical class 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 229940045714 alkyl sulfonate alkylating agent Drugs 0.000 description 1
- 150000008052 alkyl sulfonates Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229920003145 methacrylic acid copolymer Polymers 0.000 description 1
- 229940117841 methacrylic acid copolymer Drugs 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000004034 viscosity adjusting agent Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Description
本発明はゴム用離型剤、特にタイヤ用離型剤に
関する。
ゴム用離型剤としてタルクやマイカを使用する
ことは古くから行なわれている。これらの粉末は
タイヤ等の離型剤として用いると加硫時の平滑性
が不十分であり、通常他の平滑性成分と併用され
ている。この平滑性成分として酸化エチレンと酸
化プロピレンの共重合体を用いる技術が特開昭53
−91988号公報に記載されている。この方法は加
硫時の平滑性を与える点では非常に優れた方法で
あるが、酸化エチレン−酸化プロピレン共重合体
を平滑性をもたらすに十分な量用いるとタイヤの
リム滑りが生ずる欠点がみられる。従つて多量の
酸化エチレン−酸化プロピレン共重合体を用いる
ことができず、その結果、タイヤ加硫時の平滑性
が不十分となる。
本発明は酸化エチレン−酸化プロピレン共重合
体の使用量をできるだけ少なくしてリム滑りをな
くすと共に、上記共重合体の優れた特徴を維持し
たゴム用離型剤の提供を目的とする。
即ち、本発明はマイカおよび／またはタルク20
〜60重量部、酸化エチレン−酸化プロピレン共重
合体0.5〜５重量部、分子中にカルボキシル基を
有する重合体およびゴムテラツクスから選ばれる
バインダーを固型分換算で0.1〜５重量部および
分散剤を必須成分として含有するゴム用離型剤に
関する。
本発明においてマイカまたはタルクは従来ゴム
用離型剤として一般に使用されているもの、例え
ば粒径５〜100μ、好ましくは10〜50μのものが好
ましい。粒径が5μより小さい場合はブラターと
タイヤ界面の滑りが低下し、離型が困難となる。
一方100μ、特に50μを越えると離型剤中の粒子の
分散状態が悪くなると共に、加硫後の粉落ちが多
くなり環境衛生上好ましくない。マイカまたはタ
ルクの配合量は離型剤固形分100重量部中20〜60
重量部、好ましくは30〜50重量部配合する。配合
量が20重量部より少ないと離型剤としての効果が
期待できず、60重量部を越えると粒子の分散状態
が著るしく悪くなる。なお本発明ではマイカまた
はタルクを単独で使用できるが、その経済性、使
用目的に応じて混合使用してもよい。
本発明において酸化エチレン−酸化プロピレン
共重合体は離型剤固形分100重量部中0.5〜５重量
部、好ましくは１〜５重量部配合する。この共重
合体はマイカやタルクの分散安定性、加硫後の粉
落ち防止等に寄与するが、特に加硫時の平滑性を
向上させてゴムの離型効果を高める。配合量が
0.5重量部より少ないときはその効果は殆んどな
く、５重量部より多いときは加硫後にタイヤのリ
ム滑りを生ずるために好ましくない。
酸化エチレン−酸化プロピレン共重合体はブロ
ツク共重合体であつてもよいが平滑性を高めるに
はランダム共重合体が望ましい。酸化エチレン部
分と酸化プロピレン部分の重量比は25〜90：75〜
10、特に40〜80：60〜20が好ましい。分子量は
5000〜30000、特に10000〜25000が平滑性を附与
する上で適している。
本発明においてバインダーの使用は極めて重要
である。即ち、バインダーは離型剤中の粉末成分
を安定に分散させ、加硫後の粉落ちを防止する機
能の他、酸化エチレン−酸化プロピレン共重合体
と相剰的に作用して離型剤の平滑作用を向上さ
せ、その使用量を軽減させる。その結果タイヤの
リム滑りは防止される。
バインダーの使用量は固形分換算で離型剤100
重量部中、0.1〜５重量部、好ましくは0.3〜0.7重
量部である。0.1重量部より少ないとバインダー
の効果はなく、５重量部を越えるとタイヤの成形
加硫が困難となる。典型的には0.3〜0.7重量部で
あり、この範囲においてバインダーの添加効果が
顕著となる。
バインダーとしてはゴムテラツクスと分子中に
カルボキシル基を有する重合体が好ましい。
ゴムテラツクスとしてはスチレン−ブタジエン
共重合体ゴム、天然ゴム、合成ポリイソプレンゴ
ム、ポリブタジエンゴム等が使用できるが、特に
スチレン−ブタジエン共重合体ゴムが離型性、耐
熱性、粒子保持の観点から好ましい。
分子中にカルボキシル基を有する重合体として
はスチレン−マレイン酸共重合体、ポリアクリル
酸、アルリル酸−メタクリル酸共重合体またはそ
の部分エステル化物等である。これらのポリマー
は通常水溶液として用いられ、上記ゴムラテツク
スの効果に加えて、離型剤中のマイカおよび／ま
たはタルクの分散安定性に有効である。上記重合
体のうちでも、特にスチレン−マレイン酸共重合
体が好ましい。
バインダー自体の濃度は、限定的ではないが20
〜70重量％のものが好ましい。20重量％とものは
他の成分との混合が容易であり、70重量％のもの
はラテツクスの安定性上好ましい。
分散剤はアニオン型界面活性剤、ノニオン型界
面性剤が適当であるが、アニオン界面活性剤が特
に好ましく、バインダーと相剰的に作用して、マ
イカやタルクの分酸性を向上させ、共重合体によ
るタイヤのリム滑りを抑制する。好ましい界面活
性剤の具体例はロート油、脂肪酸石けん、アルキ
ルサルフエート、アルキルスルホネート、石油ス
ルホネート、ポリオキシエチレンアルキルサルフ
エート、アルキルアリールサルフエート、ポリオ
キシエチレンアリールサルフエート、アルキルベ
ンゼンスルホネート、アルキルスルホサクシネー
ト等であり、ロート油、石油スルホネートは分散
性の他に平滑性にも寄与するため、特に好まし
い。
本発明ゴム用離型剤は前記の必須成分の他、ゴ
ム用離型剤に一般に配合される他の添加剤を適宜
配合してもよい。その様な添加剤としては、例え
ば防腐剤、防錆剤、安定剤、粘度調整剤、例えば
カルボキシメチルセルロース等である。
以下、実施例をあげて本発明を説明する。実施
例中、部または比とあるのは特に述べない限り重
量で表わす。
実施例
マイカとタルクの混合物（50/50）を粒子径、
ラテツクス配合量などを変更した各種離型剤を作
成し、比較例としてシリコーンエマルジヨン系離
型剤および特開昭53−91988号公報に準じて調整
した離型剤の離型性、粉落ち性、タイヤの耐リム
滑り性について下記の方法で評価した。
(イ) タイヤの離型性
加硫後のタイヤのモールドからの離型性およ
びブラダーからの滑り性を総合的に評価した。
○印は良好、△印は普通および×印は不良であ
ることを示す。
(ロ) 粉落ち性
タイヤを加硫した後、離型剤中のマイカまた
はタルク粒子がタイヤから離脱される状態を観
察して評価した。○印は良好、△印は普通およ
び×印は不良であることを示す。
(ハ) 耐リム滑り性
タイヤビート部とリムフランジに２ケ所180゜
の位置にマークをつけ、30ｍ間隔で立てたポー
ルの回りを30回走行する。走行後タイヤビード
部とリムフランジのマークの位置ずれを読みと
ることにより、リム滑り量を測定する。なお試
験はタイヤサイズ22×11.00−８（車種ホンダ
ATC−250S：タイヤ内圧0.15Kg／cm2）で非舗
装悪路を平均速度20Kg／ｈで３回走行すること
により行なつた。３回の平均測定値を表−１に
示す。
表−１の結果から本発明のゴム用離型剤がタ
イヤの離型性、粉落ち防止性、タイヤの耐リム
滑り性に優れていることがわかる。
なお表−１中、シリコーンエマルジヨン１は
ジメチルポリシロキサン（シリコーンオイル：
粘度100000cps、固形分34％、東レシリコン
KK製）、SBCラテツクス２はカルボキシル化
スチレン−ブタジエン共重合物（旭ダウKK
製）、共重合体３はエチレンオキシドとプロピ
レンオキシドの75：25重量比のランダム共重合
物（平均分子量15000日本油脂KK製）を用い
た。
The present invention relates to a mold release agent for rubber, particularly a mold release agent for tires. Talc and mica have been used as mold release agents for rubber for a long time. When these powders are used as mold release agents for tires, etc., the smoothness during vulcanization is insufficient, and they are usually used in combination with other smoothing components. A technology using a copolymer of ethylene oxide and propylene oxide as this smoothing component was published in 1983.
-Described in Publication No. 91988. This method is very good in terms of providing smoothness during vulcanization, but it has the disadvantage that tire rim slippage occurs when a sufficient amount of ethylene oxide-propylene oxide copolymer is used to provide smoothness. It will be done. Therefore, it is not possible to use a large amount of ethylene oxide-propylene oxide copolymer, resulting in insufficient smoothness during tire vulcanization. The object of the present invention is to provide a mold release agent for rubber that eliminates rim slippage by minimizing the amount of ethylene oxide-propylene oxide copolymer used and maintains the excellent characteristics of the copolymer. That is, the present invention uses mica and/or talc 20
~60 parts by weight, 0.5 to 5 parts by weight of ethylene oxide-propylene oxide copolymer, 0.1 to 5 parts by weight of a binder selected from polymers having a carboxyl group in the molecule and rubber textures (calculated as solid content), and a dispersant are essential. This invention relates to a rubber mold release agent contained as a component. In the present invention, mica or talc is preferably one that is conventionally used as a mold release agent for rubber, such as one having a particle size of 5 to 100 microns, preferably 10 to 50 microns. If the particle size is smaller than 5μ, the slippage at the interface between the blatter and the tire decreases, making it difficult to release from the mold.
On the other hand, if it exceeds 100μ, particularly 50μ, the dispersion state of the particles in the mold release agent becomes poor, and more powder falls off after vulcanization, which is unfavorable in terms of environmental hygiene. The blending amount of mica or talc is 20 to 60 parts per 100 parts by weight of the mold release agent solid content.
It is blended in an amount of 30 to 50 parts by weight, preferably 30 to 50 parts by weight. If the amount is less than 20 parts by weight, no effect as a mold release agent can be expected, and if it exceeds 60 parts by weight, the dispersion state of the particles will deteriorate significantly. In the present invention, mica or talc can be used alone, but they may be used in combination depending on the economic efficiency and purpose of use. In the present invention, the ethylene oxide-propylene oxide copolymer is blended in an amount of 0.5 to 5 parts by weight, preferably 1 to 5 parts by weight, per 100 parts by weight of the solid content of the mold release agent. This copolymer contributes to dispersion stability of mica and talc, prevention of powder falling off after vulcanization, etc., and particularly improves smoothness during vulcanization and enhances the mold release effect of rubber. The amount of compounding
When it is less than 0.5 parts by weight, there is almost no effect, and when it is more than 5 parts by weight, it is not preferable because it causes tire rim slippage after vulcanization. The ethylene oxide-propylene oxide copolymer may be a block copolymer, but a random copolymer is preferred in order to improve smoothness. The weight ratio of ethylene oxide part and propylene oxide part is 25~90:75~
10, especially 40-80:60-20 is preferred. The molecular weight is
A value of 5,000 to 30,000, particularly 10,000 to 25,000, is suitable for imparting smoothness. The use of binders is extremely important in the present invention. In other words, the binder has the function of stably dispersing the powder component in the mold release agent and preventing the powder from falling off after vulcanization, and also acts synergistically with the ethylene oxide-propylene oxide copolymer to disperse the powder component of the mold release agent. Improves smoothing effect and reduces its usage. As a result, tire rim slippage is prevented. The amount of binder used is 100% of the release agent in terms of solid content.
In all parts by weight, it is 0.1 to 5 parts by weight, preferably 0.3 to 0.7 parts by weight. If the amount is less than 0.1 part by weight, the binder has no effect, and if it exceeds 5 parts by weight, molding and vulcanization of the tire becomes difficult. The amount is typically 0.3 to 0.7 parts by weight, and the effect of adding the binder becomes significant within this range. As the binder, rubber texture and a polymer having a carboxyl group in the molecule are preferred. As the rubber texture, styrene-butadiene copolymer rubber, natural rubber, synthetic polyisoprene rubber, polybutadiene rubber, etc. can be used, and styrene-butadiene copolymer rubber is particularly preferred from the viewpoints of mold releasability, heat resistance, and particle retention. Examples of the polymer having a carboxyl group in the molecule include styrene-maleic acid copolymer, polyacrylic acid, allyllic acid-methacrylic acid copolymer, or partially esterified products thereof. These polymers are usually used in the form of an aqueous solution, and in addition to the effects of the rubber latex described above, they are effective in stabilizing the dispersion of mica and/or talc in the mold release agent. Among the above polymers, styrene-maleic acid copolymer is particularly preferred. The concentration of the binder itself may be, but is not limited to, 20
~70% by weight is preferred. A content of 20% by weight is easy to mix with other components, and a content of 70% by weight is preferred from the viewpoint of stability of the latex. Anionic surfactants and nonionic surfactants are suitable for the dispersant, but anionic surfactants are particularly preferable, as they work additively with the binder to improve the dispersion properties of mica and talc, and improve copolymerization. Suppresses tire rim slippage due to combination. Specific examples of preferred surfactants include funnel oil, fatty acid soap, alkyl sulfates, alkyl sulfonates, petroleum sulfonates, polyoxyethylene alkyl sulfates, alkylaryl sulfates, polyoxyethylene aryl sulfates, alkylbenzene sulfonates, and alkyl sulfosuccinates. etc., and funnel oil and petroleum sulfonate are particularly preferred since they contribute to smoothness as well as dispersibility. In addition to the above-mentioned essential components, the rubber mold release agent of the present invention may optionally contain other additives commonly incorporated into rubber mold release agents. Such additives include, for example, preservatives, rust preventives, stabilizers, viscosity modifiers, such as carboxymethyl cellulose, and the like. The present invention will be explained below with reference to Examples. In the examples, parts or ratios are expressed by weight unless otherwise stated. Example: Mixture of mica and talc (50/50) with particle size,
Various mold release agents were prepared with different amounts of latex mixed, etc., and as comparative examples, the mold release properties and powder removal properties of a silicone emulsion type mold release agent and a mold release agent prepared according to JP-A-53-91988 were prepared. The rim slip resistance of the tires was evaluated using the following method. (B) Mold releasability of tires The releasability of the tires after vulcanization from the mold and the slipperiness from the bladder were comprehensively evaluated.
◯ indicates good, △ indicates normal, and × indicates poor. (b) Powder removal property After the tires were vulcanized, evaluation was made by observing the state in which the mica or talc particles in the mold release agent were released from the tires. ◯ indicates good, △ indicates normal, and × indicates poor. (c) Rim slip resistance Mark the tire bead and rim flange at two 180° positions and run 30 times around poles set up at 30m intervals. After driving, the amount of rim slippage is measured by reading the positional deviation between the mark on the tire bead and the rim flange. The test was conducted using tire size 22 x 11.00-8 (car model Honda).
ATC-250S: The test was conducted by driving three times on a rough, unpaved road with an internal tire pressure of 0.15 kg/cm 2 at an average speed of 20 kg/h. Table 1 shows the average measured values of three times. From the results in Table 1, it can be seen that the rubber mold release agent of the present invention is excellent in tire release properties, powder fall prevention properties, and tire rim slip resistance. In Table 1, silicone emulsion 1 is dimethylpolysiloxane (silicone oil:
Viscosity 100000cps, solid content 34%, Toray silicone
KK), SBC Latex 2 is a carboxylated styrene-butadiene copolymer (Asahi Dow KK)
Copolymer 3 was a random copolymer of ethylene oxide and propylene oxide in a weight ratio of 75:25 (average molecular weight 15,000, manufactured by NOF KK).
【表】【table】
Claims (1)
酸化エチレン−酸化プロピレン共重合体0.5〜５
重量部、分子中にカルボキシル基を有する重合体
およびゴムラテツクスから選ばれるバインダー
0.1〜５重量部（固形分換算）および分散剤を必
須成分として含有するゴム用離型剤。 ２ マイカまたはタルクの平均粒径が10〜50μで
ある第１項記載のゴム用離型剤。 ３ 酸化エチレン−酸化プロピレン共重合体がラ
ンダム共重合体である第１項記載のゴム用離型
剤。 ４ 酸化エチレン−酸化プロピレン共重合体の酸
化エチレン部分と酸化プロピレン部分の重量比が
25〜90：75〜10である第１項記載のゴム用離型
剤。 ５ 酸化エチレン−酸化プロピレン共重合体の分
子量が5000〜30000である第１項記載のゴム用離
型剤。 ６ カルボキシル基を有する重合体がスチレン−
マレイン酸共集合体である第１項記載のゴム用離
型剤。 ７ ゴムラテツクスがスチレン−ブタジエンゴム
ラテツクスである第１項記載のゴム用離型剤。 ８ 分散剤がアニオン型界面活性剤である第１項
記載のゴム用離型剤。[Claims] 1. 20 to 60 parts by weight of mica and/or talc,
Ethylene oxide-propylene oxide copolymer 0.5-5
Part by weight, binder selected from polymers and rubber latexes having carboxyl groups in the molecule.
A mold release agent for rubber containing 0.1 to 5 parts by weight (in terms of solid content) and a dispersant as essential components. 2. The rubber mold release agent according to item 1, wherein the mica or talc has an average particle size of 10 to 50 μm. 3. The mold release agent for rubber according to item 1, wherein the ethylene oxide-propylene oxide copolymer is a random copolymer. 4 The weight ratio of the ethylene oxide part and the propylene oxide part of the ethylene oxide-propylene oxide copolymer is
25-90: The rubber mold release agent according to item 1, wherein the ratio is 75-10. 5. The rubber mold release agent according to item 1, wherein the ethylene oxide-propylene oxide copolymer has a molecular weight of 5,000 to 30,000. 6 Polymer having carboxyl group is styrene-
2. The rubber mold release agent according to item 1, which is a maleic acid co-aggregate. 7. The rubber mold release agent according to item 1, wherein the rubber latex is a styrene-butadiene rubber latex. 8. The rubber mold release agent according to item 1, wherein the dispersant is an anionic surfactant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57177130A JPS5966434A (en) | 1982-10-07 | 1982-10-07 | Releasing agent for rubber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57177130A JPS5966434A (en) | 1982-10-07 | 1982-10-07 | Releasing agent for rubber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5966434A JPS5966434A (en) | 1984-04-14 |
| JPH0348845B2 true JPH0348845B2 (en) | 1991-07-25 |
Family
ID=16025694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57177130A Granted JPS5966434A (en) | 1982-10-07 | 1982-10-07 | Releasing agent for rubber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5966434A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2525155B2 (en) * | 1986-08-12 | 1996-08-14 | 保土谷化学工業株式会社 | Method for thermal stabilization of polyether polymer |
| FR2742446B1 (en) * | 1995-12-14 | 1999-01-15 | Coatex Sa | USE OF COPOLYMERS OF STYRENE AND MALEIC ANHYDRIDE AS DISPERSING AND / OR MINERAL LOAD TREATMENT AGENTS. THERMOPLASTIC COMPOSITIONS CONTAINING THEM |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51134773A (en) * | 1975-05-19 | 1976-11-22 | Nippon Kokuen Kogyo Kk | Method of making self lubricating rubber molded product |
| JPS5391988A (en) * | 1977-01-24 | 1978-08-12 | Asahi Denka Kogyo Kk | Release agent for tire mold |
| JPS553444A (en) * | 1978-06-21 | 1980-01-11 | Sumitomo Rubber Ind Ltd | Rubber release agent |
-
1982
- 1982-10-07 JP JP57177130A patent/JPS5966434A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51134773A (en) * | 1975-05-19 | 1976-11-22 | Nippon Kokuen Kogyo Kk | Method of making self lubricating rubber molded product |
| JPS5391988A (en) * | 1977-01-24 | 1978-08-12 | Asahi Denka Kogyo Kk | Release agent for tire mold |
| JPS553444A (en) * | 1978-06-21 | 1980-01-11 | Sumitomo Rubber Ind Ltd | Rubber release agent |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5966434A (en) | 1984-04-14 |
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