JPH05295336A - Preparation of solvent-type chloroprene-based adhesive - Google Patents

Preparation of solvent-type chloroprene-based adhesive

Info

Publication number
JPH05295336A
JPH05295336A JP9526192A JP9526192A JPH05295336A JP H05295336 A JPH05295336 A JP H05295336A JP 9526192 A JP9526192 A JP 9526192A JP 9526192 A JP9526192 A JP 9526192A JP H05295336 A JPH05295336 A JP H05295336A
Authority
JP
Japan
Prior art keywords
solvent
rubber
chips
type
chloroprene
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
Application number
JP9526192A
Other languages
Japanese (ja)
Inventor
Hironori Ura
碩伯 浦
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.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical 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 Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP9526192A priority Critical patent/JPH05295336A/en
Publication of JPH05295336A publication Critical patent/JPH05295336A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To make uniform mixing of chips with a vulcanizing agent possible by dissolving, under stirring with a specific stirrer, the chips of a carboxylated chloroprene rubber in an organic solvent being dispersed with a vulcanizing agent. CONSTITUTION:In a dissolving vessel, a stirrer of a high speed shearing-type which comprises a fixed ring 10 with a number of flow holes 12 in the side wall 11, a moving blade 20 mounted inside the ring and a flange 30 equipped with a few long rods 31 for fixing that is fixed on the ring 10 is installed. The dissolving vessel is charged with chips of a carboxylated chloroprene rubber having a Mooney viscosity of 30-50, a thickness of 1-50mm and a length and a width of each 3-50mm and an organic solvent dispersing a vulcanizing agent comprising a metal oxide. The chips are dissolved in the solvent under stirring by rotating the moving blade 20 at a rotational speed of 1,000-3,000rpm.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、ゴムの素練りや混練
りを行うことなしに、溶剤型クロロプレン系接着剤を製
造する方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a solvent type chloroprene adhesive without masticating or kneading rubber.

【0002】[0002]

【従来の技術】クロロプレンゴムを使用し、これに金属
酸化物などの加硫剤、フェノール樹脂誘導体などの粘着
付与剤、その他老化防止剤、加硫促進剤、充填剤などを
有機溶剤に溶解ないしは分散させた溶剤型クロロプレン
系接着剤は、広く知られている。
2. Description of the Related Art Chloroprene rubber is used and a vulcanizing agent such as a metal oxide, a tackifier such as a phenol resin derivative, an antiaging agent, a vulcanization accelerator, a filler and the like are dissolved or dissolved in an organic solvent. Dispersed solvent-type chloroprene-based adhesives are widely known.

【0003】このような接着剤は、初期接着性が良好
で、乾燥塗膜を触圧するだけですぐ接着するので、使い
やすいという利点がある。また、耐熱性も良好である。
しかし、この接着剤は、これを被着体の対向するそれぞ
れの面に塗布し、溶剤の揮発を待って貼り合わせねば良
好な接着は行われない。
Such an adhesive has a good initial adhesiveness and has an advantage that it is easy to use because it adheres immediately by touching the dry coating film. Also, the heat resistance is good.
However, good adhesion cannot be achieved unless this adhesive is applied to the respective surfaces of the adherend that face each other and the solvent is volatilized before they are bonded.

【0004】片面塗布でも貼り合わせが可能で、しかも
初期接着性や耐熱性に優れた溶剤型クロロプレン系接着
剤として、カルボキシル基を有するクロロプレンゴムを
使用した接着剤が提案されている(例えば、特平1−1
08282号公報参照)。
Adhesives using chloroprene rubber having a carboxyl group have been proposed as solvent-type chloroprene-based adhesives which can be laminated even by single-side application and have excellent initial adhesiveness and heat resistance (for example, Flat 1-1
No. 08282).

【0005】この種の溶剤型クロロプレン系接着剤を製
造する際には、先ず、慣用の開放型二本ロールを用い
て、カルボキシル基を有するクロロプレンゴムチップと
金属酸化物などの加硫剤との素練り及び混練りが行わ
れ、その後で有機溶剤に溶解される。
In the production of this type of solvent-type chloroprene-based adhesive, first, a chloroprene rubber chip having a carboxyl group and a vulcanizing agent such as a metal oxide are mixed with a conventional open type two-roll roll. Kneading and kneading are carried out, and thereafter, they are dissolved in an organic solvent.

【0006】このような素練り及び混練りにより、ゴム
分子の主鎖と側鎖の分断が行われて高い固形分で低い粘
度の溶液が得られ、また、ゴム分子の存在する溶剤に不
溶解の高分子塊(ミクロゲル)が崩壊して溶解しやすく
なる。
By such mastication and kneading, the main chain and the side chain of the rubber molecule are divided to obtain a solution having a high solid content and a low viscosity, and it is insoluble in the solvent in which the rubber molecule is present. The polymer mass (microgel) of (1) disintegrates and becomes easy to dissolve.

【0007】さらに、金属酸化物等の配合剤が均一に分
散して良好な流動性ととも、初期接着性や耐熱性が発現
するものであり、特に、カルボキシル基を有するクロロ
プレンゴムを用いると、初期接着性や耐熱性が優れ、ま
た接着剤溶液中での相分離が起こりにくいという利点が
ある。
Further, the compounding agents such as metal oxides are uniformly dispersed to exhibit good fluidity and initial adhesiveness and heat resistance. Particularly, when chloroprene rubber having a carboxyl group is used, It has the advantages of excellent initial adhesion and heat resistance, and less phase separation in the adhesive solution.

【0008】[0008]

【発明が解決しようとする課題】ところが、カルボキシ
ル基を有するクロロプレンゴムは、このカルボキシル基
と金属酸化物などの加硫剤との反応性が高いため、混練
りの条件のばらつき等により、スコーチ(早期加硫、焼
け)が起こり、加工不能となることがある。
However, since chloroprene rubber having a carboxyl group has high reactivity with the carboxyl group and a vulcanizing agent such as a metal oxide, the scorch ( Premature vulcanization and burning may occur, making processing impossible.

【0009】また、うまく加工ができたとしても、混練
りされたゴム組成物は加硫が進行しやすいので、その日
のうちに有機溶剤に溶解させねばならないという欠点が
ある。さらに、開放型二本ロールでのゴムの素練り及び
混練りは、危険で汚いきつい、品質が安定しない等の欠
点がある。
Further, even if it is successfully processed, the kneaded rubber composition has a drawback that it must be dissolved in an organic solvent within the same day because vulcanization is likely to proceed. Further, the mastication and kneading of rubber with an open type two-roll has drawbacks such as being dangerous and dirty, and the quality is not stable.

【0010】この発明は、上記の欠点を解消するもの
で、その目的とするところは、ゴムの素練り及び混練を
行うことなしに、カルボキシル基を有するクロロプレン
ゴムチップを直接溶解させ、同時に金属酸化物からなる
加硫剤との均質混合を可能にした溶剤型クロロプレン系
接着剤の製造方法を提供することにある。
The present invention solves the above-mentioned drawbacks, and an object of the present invention is to directly dissolve a chloroprene rubber chip having a carboxyl group without simultaneously masticating and kneading a rubber, and at the same time, a metal oxide. Another object of the present invention is to provide a method for producing a solvent-type chloroprene-based adhesive that enables homogeneous mixing with a vulcanizing agent consisting of

【0011】[0011]

【課題を解決するための手段】上記の目的を達成するた
め、この発明では、カルボキシル基を有するクロロプレ
ンゴムチップを、金属酸化物からなる加硫剤を分散させ
た有機溶剤中に、側壁に多数の流通穴を有する固定リン
グとその内側に配設された回転羽根とから構成された高
速強剪断型の攪拌器により、攪拌しながら溶解させるも
のである。
In order to achieve the above object, in the present invention, a large number of chloroprene rubber chips having a carboxyl group are provided on the side wall in an organic solvent in which a vulcanizing agent composed of a metal oxide is dispersed. A stirring ring of a high-speed strong shearing type, which is composed of a fixed ring having a flow hole and a rotating blade arranged inside the ring, is used to dissolve the mixture while stirring.

【0012】この発明で用いるカルボキシル基を有する
クロロプレンゴムは、例えば、クロロプレン単量体をこ
れと共重合し得る不飽和脂肪族有機カルボン酸、例えば
アクリル酸、メタクリル酸、イタコン酸等と乳化重合法
で共重合することにより得られる。
The chloroprene rubber having a carboxyl group used in the present invention is obtained by an emulsion polymerization method with an unsaturated aliphatic organic carboxylic acid such as acrylic acid, methacrylic acid or itaconic acid which is capable of copolymerizing a chloroprene monomer. It is obtained by copolymerizing with.

【0013】また、クロロプレン単量体を、2,3-メルカ
プトプロピオン酸、チオリンゴ酸等のメルカプトカルボ
ン酸(連鎖移動剤)の存在下で乳化重合法で重合又は共
重合することにより製造することができる。この場合、
カルボキシル基が重合体又は共重合体の末端に導入され
る。
The chloroprene monomer can be produced by polymerizing or copolymerizing by an emulsion polymerization method in the presence of a mercaptocarboxylic acid (chain transfer agent) such as 2,3-mercaptopropionic acid and thiomalic acid. it can. in this case,
Carboxyl groups are introduced at the ends of the polymer or copolymer.

【0014】カルボキシル基を有するクロロプレンゴム
は、ムーニー粘度(単位ML1+4 、100℃)が30〜
50のものが好ましい。また、ゴムのチップは、厚みが
1〜5mmのもので、縦及び横の長さがそれぞれ3〜50
mmのものが好ましい。
The chloroprene rubber having a carboxyl group has a Mooney viscosity (unit: ML 1 + 4 , 100 ° C.) of 30 to.
50 is preferable. Also, the rubber tip has a thickness of 1 to 5 mm and a length and width of 3 to 50 mm, respectively.
mm is preferable.

【0015】金属酸化物からなる加硫剤としては、酸化
マグネシウム(マグネシア)又は酸化亜鉛(亜鉛華)が
好適である。これ等の金属酸化物の粒径は、酸化マグネ
シウムの場合は0.2〜0.7μm のもの、酸化亜鉛の
場合は0.02〜0.07μm のものが沈降防止の点で
好ましい。
As the vulcanizing agent composed of a metal oxide, magnesium oxide (magnesia) or zinc oxide (zinc white) is preferable. The particle size of these metal oxides is preferably 0.2 to 0.7 μm in the case of magnesium oxide and 0.02 to 0.07 μm in the case of zinc oxide from the viewpoint of preventing sedimentation.

【0016】金属酸化物からなる加硫剤は、カルボキシ
ル基を有するクロロプレンゴムチップ100重量部に対
して3〜30重量部が好ましい。3重量部未満では加硫
効果が小さく、30重量部を越えると増粘や分散不良が
起こることがある。
The vulcanizing agent composed of a metal oxide is preferably 3 to 30 parts by weight with respect to 100 parts by weight of the chloroprene rubber chip having a carboxyl group. If it is less than 3 parts by weight, the vulcanization effect is small, and if it exceeds 30 parts by weight, thickening and poor dispersion may occur.

【0017】有機溶剤としては、カルボキシル基を有す
るクロロプレンゴムを溶解し、しかも粘着付与剤などの
樹脂状物を溶解し得る溶剤が用いられる。これ等の有機
溶剤は、一般に固形分が15〜40重量%の範囲内で、
所望の粘度に調整される。
As the organic solvent, a solvent which can dissolve chloroprene rubber having a carboxyl group and can dissolve a resinous material such as a tackifier is used. These organic solvents generally have a solid content in the range of 15 to 40% by weight,
Adjusted to desired viscosity.

【0018】有機溶剤は、例えば、トルエン、キシレン
などの芳香族系、n−ヘキサン、n−ヘプタンなどの脂
肪族、アセトン、メチルエチルケトンなどのケトン系、
酢酸エチルなどのエステル系、トリクレンなどの塩素系
の中から選ばれ、その単独或いは二種以上を混合して用
いられる。
Examples of the organic solvent include aromatic solvents such as toluene and xylene, aliphatic solvents such as n-hexane and n-heptane, ketone solvents such as acetone and methyl ethyl ketone, and the like.
It is selected from ester type such as ethyl acetate and chlorine type such as trichlene, and they are used alone or in combination of two or more kinds.

【0019】この発明を実施するには、先ず、高速強剪
断型の攪拌器(攪拌ヘッド)を取り付けた溶解槽が用意
される。この攪拌器は、図1に示すように、固定リング
(ステーター)10と、その内側に配設された回転羽根
(ローター)20とから構成されている。
To carry out the present invention, first, a dissolution tank equipped with a high-speed strong shearing type stirrer (stirring head) is prepared. As shown in FIG. 1, this stirrer is composed of a fixed ring (stator) 10 and rotating blades (rotor) 20 arranged inside thereof.

【0020】回転羽根20は、図示のような平板状の羽
根やその他プロペラ状の羽根が用いられ、その複数枚が
長い回転軸21の先端に取り付けられ、固定リング10
の内側に配設されている。そして、回転軸21の後端は
モーター(図は省略)の軸に取り付けられ、それにより
高速回転が可能になされている。
As the rotary blade 20, a flat blade as shown in the figure or other propeller blades are used, and a plurality of them are attached to the tip of a long rotary shaft 21 to fix the fixed ring 10.
Is arranged inside. The rear end of the rotary shaft 21 is attached to the shaft of a motor (not shown), which enables high speed rotation.

【0021】なお、回転羽根20のやや上方にはフラン
ジ30が配設され、このフランジ30には数本の長い固
定用の棒31の先端が取り付けられ、その後端が上記モ
ーターの本体に取り付けられ、それによりフランジ30
が動かないように固定されている。
A flange 30 is provided slightly above the rotary blades 20, the ends of several long fixing rods 31 are attached to the flange 30, and the rear end is attached to the main body of the motor. , Thereby the flange 30
Is fixed so that it does not move.

【0022】固定リング10の側壁11には、多数の流
通孔12が設けられている。この流通孔12は、この流
通孔を通る流体に強い剪断を与えるためのもので、図示
のような縦長孔(スロット)状のものが好ましいが、そ
の他丸孔状、多角形状など任意のものが使用可能であ
る。流通孔12の寸法は、実際に用いるゴムチップの寸
法を考慮して適当に設定される。
The side wall 11 of the fixing ring 10 is provided with a large number of through holes 12. The flow hole 12 is for giving a strong shear to the fluid passing through the flow hole, and is preferably a vertically long hole (slot) shape as shown in the drawing, but may be any other shape such as a round hole shape or a polygonal shape. It can be used. The size of the flow hole 12 is set appropriately in consideration of the size of the rubber chip actually used.

【0023】この固定リング10は、その周囲に取付け
用の鍔13を有し、この鍔13が上記のフランジ30に
取り付けられ、それにより固定リング10が動かないよ
うに固定されている。
The fixing ring 10 has a flange 13 for attachment around the periphery thereof, and the flange 13 is attached to the above-mentioned flange 30 so that the fixing ring 10 is fixed so as not to move.

【0024】高速強剪断型の攪拌器を取り付けた溶解槽
に、適量の有機溶剤と金属酸化物、その他必要に応じて
フェノール樹脂誘導体のような粘着付与剤、フェノール
樹脂誘導体と金属酸化物との反応物、老化防止剤、加硫
促進剤、充填剤等が適量仕込まれる。
In a dissolution tank equipped with a high speed strong shearing type agitator, an appropriate amount of an organic solvent and a metal oxide, and if necessary, a tackifier such as a phenol resin derivative, a phenol resin derivative and a metal oxide are added. Reactants, antioxidants, vulcanization accelerators, fillers, etc. are charged in appropriate amounts.

【0025】なお、フェノール樹脂誘導体としては、熱
可塑性のアルキルフェノール樹脂やテルペンフェノール
樹脂などが用いられる。また、フェノール樹脂誘導体と
金属酸化物との反応物における金属酸化物としては、酸
化マグネシウムや酸化亜鉛が用いられる。
As the phenol resin derivative, a thermoplastic alkylphenol resin or terpene phenol resin is used. Moreover, magnesium oxide or zinc oxide is used as the metal oxide in the reaction product of the phenol resin derivative and the metal oxide.

【0026】そして、攪拌器の回転羽根が適当な速度で
回転され、それにより金属酸化物からなる加硫剤が均一
に分散されるとともに、その他の樹脂状物も均一に溶解
される。こうして、有機溶剤の溶解液ないしは分散液が
得られる。
Then, the rotary blades of the stirrer are rotated at an appropriate speed, whereby the vulcanizing agent composed of the metal oxide is uniformly dispersed, and other resinous substances are also uniformly dissolved. Thus, a solution or dispersion of the organic solvent is obtained.

【0027】その後、上記有機溶剤の溶解液ないしは分
散液に、カルボキシル基を有するクロロプレンゴムチッ
プが適量仕込まれ、攪拌器の回転羽根が高速で回転され
て強剪断がかかり、それによりゴムチップが均一に溶解
される。
Then, an appropriate amount of chloroprene rubber chips having a carboxyl group is charged into the solution or dispersion of the above organic solvent, the rotary blades of the stirrer are rotated at high speed and subjected to strong shearing, whereby the rubber chips are uniformly dissolved. To be done.

【0028】回転羽根の回転数が低速にすぎる場合は、
固定リングの流通孔での吸引破砕速度が遅くなってゴム
チップの溶解速度が遅くなり、また剪断力も弱まってゴ
ム分子の切断効果が低下し、溶液粘度の低下が小さく良
好な流動性が得られない。
If the rotation speed of the rotary blade is too low,
The suction crushing speed in the flow hole of the fixing ring becomes slower, the dissolution rate of the rubber chips becomes slower, and the shearing force also weakens, and the effect of cutting rubber molecules decreases, and the solution viscosity is small and good fluidity cannot be obtained. ..

【0029】逆に、回転羽根の回転数が高速にすぎる場
合は、攪拌器の回転羽根部において、回転エネルギーが
熱エネルギーに変換し高温となり、金属酸化物によるゴ
ムの加硫が促進され、最後にはゴムの焼きつきにより攪
拌不能となる。
On the contrary, when the rotation speed of the rotary blade is too high, the rotary energy is converted into heat energy in the rotary blade portion of the stirrer and becomes high temperature, and the vulcanization of the rubber by the metal oxide is promoted. It becomes impossible to stir due to the burning of rubber.

【0030】それゆえ、回転羽根の回転数は、一般に1
000〜3000rpmが好ましい。こうして、溶剤型
クロロプレン系接着剤が製造される。なお、上記の高速
強剪断型の攪拌器とともに、例えば、錨型低速攪拌器、
プロペラ型低速攪拌器、高速分散器などの汎用の攪拌器
を併用して溶解を行うと、さらに効果的である。
Therefore, the rotation speed of the rotary blade is generally 1
000 to 3000 rpm is preferable. Thus, the solvent-type chloroprene-based adhesive is manufactured. Incidentally, together with the high-speed strong shear type stirrer, for example, an anchor type low-speed stirrer,
It is more effective to use a general-purpose stirrer such as a propeller-type low-speed stirrer and a high-speed disperser together to carry out the dissolution.

【0031】[0031]

【作用】このように、側壁に多数の流通穴を有する固定
リングとその内側に配設された回転羽根とから構成され
た高速強剪断型の攪拌器を用いて、カルボキシル基を有
するクロロプレンゴムチップを有機溶剤中で攪拌する
と、回転羽根の高速回転により、ゴムチップを含む液は
固定リングの流通孔を通過する。この際、ゴムチップに
は固定リングの流通孔と回転羽根との間で強い剪断がか
かり、それにより微細片に吸引破砕される。
As described above, a chloroprene rubber chip having a carboxyl group is prepared by using a high-speed strong shearing type stirrer composed of a fixed ring having a large number of through holes in the side wall and a rotary blade arranged inside the fixed ring. When stirred in an organic solvent, the liquid containing the rubber chips passes through the flow holes of the fixed ring due to the high speed rotation of the rotary blades. At this time, the rubber chip is strongly sheared between the flow hole of the fixing ring and the rotary blade, and is thereby crushed by suction into fine pieces.

【0032】そして、この強い剪断によりゴム分子の主
鎖と側鎖の分断が行われ、それにより高い固形分での溶
液粘度が低下する。また、ゴム分子の存在する溶剤に不
溶解の高分子塊(ミクロゲル)が崩壊して有機溶剤に溶
解しやすくなる。
The strong shearing causes the main chain and the side chain of the rubber molecule to be separated, which reduces the solution viscosity at a high solid content. Further, a polymer mass (microgel) that is insoluble in the solvent in which the rubber molecules are present is disintegrated and easily dissolved in the organic solvent.

【0033】さらに、溶液は固定リングの流通孔を通り
繰り返し吸引破砕されながら攪拌されるので、有機溶剤
中に分散されている金属酸化物の粒子どうしの凝集がな
くなり、単一粒子での良好な分散が行われ、金属酸化物
が沈澱しにくくなる。その結果、良好な流動性や耐熱性
が発現する。
Further, since the solution is repeatedly stirred and crushed by suction through the flow holes of the fixing ring, the metal oxide particles dispersed in the organic solvent do not agglomerate with each other, so that the single particles are excellent. Dispersion is performed, and the metal oxide is less likely to precipitate. As a result, good fluidity and heat resistance are exhibited.

【0034】このような作用は、側壁に多数の流通穴を
有する固定リングとその内側に配設された回転羽根とか
ら構成された高速強剪断型の攪拌器を用いた場合に発現
し、通常の攪拌器では、溶解速度が遅い、溶液粘度が高
い、流動性が悪く塗布性が劣る、配合剤の分散性が悪く
沈澱する等の問題が発生する。
Such an effect is exhibited when a high-speed strong-shear type agitator composed of a fixed ring having a large number of through holes on its side wall and a rotary blade arranged inside the fixed ring is used. The stirrer described above causes problems such as slow dissolution rate, high solution viscosity, poor fluidity, poor coatability, poor dispersibility of the compounding agent, and precipitation.

【0035】[0035]

【実施例】以下、本発明の実施例及び比較例を示す。実施例1 先ず、図1に示すような高速強剪断型の攪拌器(T.
K.ユニミクサーA520:特殊機化工業製)を取り付
けた100リットルのステンレス製溶解槽を用意した。
EXAMPLES Examples and comparative examples of the present invention will be shown below. Example 1 First, a high speed strong shearing type agitator (T.
K. A 100-liter stainless steel dissolution tank equipped with Unimixer A520: manufactured by Tokushu Kika Kogyo Co., Ltd. was prepared.

【0036】この溶解槽に、トルエン320重量部、フ
ェノール樹脂誘導体(t−ブチルフェノール樹脂)(1
00重量部)と酸化マグネシウム(10重量部)とをト
ルエン溶液中で40℃×5時間反応させた反応液(トル
エンの50重量%溶液)48重量部を仕込んだ。
320 parts by weight of toluene, a phenol resin derivative (t-butylphenol resin) (1
(00 parts by weight) and magnesium oxide (10 parts by weight) were reacted in a toluene solution at 40 ° C. for 5 hours to prepare 48 parts by weight of a reaction liquid (50% by weight solution of toluene).

【0037】さらに、酸化マグネシウム4重量部と老化
防止剤(スミライザーBHT:住友化学製)2重量部を
仕込み、攪拌器の回転数3000rpmで約15分間攪
拌し、酸化マグネシウムを溶液中に均一に分散させた。
Further, 4 parts by weight of magnesium oxide and 2 parts by weight of an antioxidant (Sumilyzer BHT: manufactured by Sumitomo Chemical Co., Ltd.) were charged, and the mixture was stirred at 3000 rpm for about 15 minutes to uniformly disperse the magnesium oxide in the solution. Let

【0038】次いで、ムーニー粘度(単位ML1+4 、1
00℃)が40のカルボキシル基を有するクロロプレン
ゴム(デンカクロロプレンDCR−12L:電気化学
製)のチップ(縦40mm×横12mm×厚さ4mm)100
重量部を仕込み、攪拌器の回転数3000rpmで2時
間攪拌してゴムチップを溶解した。こうして、溶剤型ク
ロロプレン系接着剤を製造した。
Next, the Mooney viscosity (unit: ML 1 + 4 , 1
Chloroprene rubber (DENKA chloroprene DCR-12L: manufactured by Denki Kagaku) having a carboxyl group of 40 at 00 ° C (length 40 mm x width 12 mm x thickness 4 mm) 100
Part by weight was charged and the rubber chips were dissolved by stirring for 2 hours at 3000 rpm of the stirrer. Thus, a solvent-type chloroprene-based adhesive was produced.

【0039】実施例2 実施例1において、攪拌器の回転数3000rpmで4
時間攪拌してゴムチップを溶解した。それ以外は実施例
1と同様に行った。
Example 2 In Example 1, the rotation speed of the stirrer was changed to 3000 rpm.
The rubber chips were dissolved by stirring for a time. Other than that was performed like Example 1.

【0040】実施例3 実施例1において、攪拌器の回転数3000rpmで6
時間攪拌してゴムチップを溶解した。それ以外は実施例
1と同様に行った。
Example 3 In Example 1, the rotation speed of the stirrer was 6 at 3000 rpm.
The rubber chips were dissolved by stirring for a time. Other than that was performed like Example 1.

【0041】比較例1 汎用のプロペラ型低速攪拌器(サタケポータブルミキサ
ーA52:佐竹化学機械工業製)を取り付けた100リ
ットルのステンレス製溶解槽を用意した。なお、このプ
ロペラ型低速攪拌器は、3枚のプロペラ状の羽根のみか
らなり、その周りには固定リングは設けられていない。
Comparative Example 1 A 100-liter stainless steel dissolution tank equipped with a general-purpose propeller-type low-speed stirrer (Satake Portable Mixer A52: manufactured by Satake Chemical Machinery Co., Ltd.) was prepared. The propeller-type low-speed stirrer consisted of only three propeller-shaped blades, and no fixing ring was provided around it.

【0042】また、ムーニー粘度(単位ML1+4 、10
0℃)が40のカルボキシル基を有するクロロプレンゴ
ム(デンカクロロプレンDCR−12L:電気化学製)
100重量部と、酸化マグネシウム4重量部と、老化防
止剤(スミライザーBHT:住友化学製)2重量部と
を、開放型二本ロールを用い、50℃で約30分間混練
りしてシート状に成形し、これをカッターで切断したゴ
ム配合チップ(縦120mm×横20mm×厚さ10mm)を
用意した。
The Mooney viscosity (unit: ML 1 + 4 , 10
Chloroprene rubber having 40 carboxyl groups (0 ° C) (Denka Chloroprene DCR-12L: manufactured by Denki Kagaku)
100 parts by weight, 4 parts by weight of magnesium oxide, and 2 parts by weight of an anti-aging agent (Sumilyzer BHT: manufactured by Sumitomo Chemical Co., Ltd.) were kneaded for about 30 minutes at 50 ° C. using an open type two-roll to form a sheet. A rubber-blended chip (120 mm in length x 20 mm in width x 10 mm in thickness) which was molded and cut with a cutter was prepared.

【0043】前記の溶解槽に、トルエン320重量部、
実施例1で用いたフェノール樹脂誘導体と酸化マグネシ
ウムとの反応液(トルエンの50重量%溶液)48重量
部を仕込んだ。これに、上記のゴム配合チップ106重
量部を投入し、攪拌器の回転数360rpmで20時間
攪拌してゴム配合チップを溶解した。こうして、溶剤型
クロロプレン系接着剤を製造した。
320 parts by weight of toluene,
48 parts by weight of a reaction solution (50% by weight solution of toluene) of the phenol resin derivative used in Example 1 and magnesium oxide was charged. To this, 106 parts by weight of the rubber-blended chips described above were charged, and the rubber-blended chips were melted by stirring at a rotation number of 360 rpm for 20 hours. Thus, a solvent-type chloroprene-based adhesive was produced.

【0044】比較例2 実施例1において、高速強剪断型の攪拌器を取り付けた
溶解槽に替えて、汎用のプロペラ型低速攪拌器(サタケ
ポータブルミキサーA52:佐竹化学機械工業製)を取
り付けた100リットルのステンレス製溶解槽を用い
た。また、攪拌器の回転数360rpmで20時間攪拌
することにより、ゴムチップを溶解した。それ以外は実
施例1と同様に行った。
Comparative Example 2 In Example 1, a general-purpose propeller-type low-speed agitator (Satake Portable Mixer A52: manufactured by Satake Kagaku Kikai Kogyo Co., Ltd.) was attached instead of the dissolution tank equipped with a high-speed strong-shear type agitator. A liter stainless steel dissolution tank was used. Further, the rubber chips were dissolved by stirring for 20 hours at a rotation number of 360 rpm of the stirrer. Other than that was performed like Example 1.

【0045】以上、実施例1〜3及び比較例1〜2で製
造された5種の溶剤型クロロプレン系接着剤について、
下記の方法で、分散性、流動性、接着強度を測定した。
その結果を表1に示す。
The five solvent-type chloroprene-based adhesives produced in Examples 1 to 3 and Comparative Examples 1 and 2 are as follows.
The dispersibility, fluidity and adhesive strength were measured by the following methods.
The results are shown in Table 1.

【0046】(1) 分散性 接着剤を透明な瓶に入れ室内に1箇月間静置し、瓶の底
に層状に沈降した金属酸化物(酸化マグネシウム)の沈
降高さを測定した。この沈降高さが小さいほうが分散性
が良い。
(1) Dispersibility The adhesive was put in a transparent bottle and allowed to stand in the room for 1 month, and the sedimentation height of the layered metal oxide (magnesium oxide) was measured at the bottom of the bottle. The smaller the settling height, the better the dispersibility.

【0047】(2) 流動性 接着剤を透明なビーカー瓶に入れ、これに直径6mmのス
テンレス棒を挿し入れて500rpmで回転させ、60
秒後の接着剤の巻付け高さを測定した。この巻付け高さ
が小さいほうが流動性が良い。
(2) Fluidity The adhesive is put in a transparent beaker bottle, a stainless rod having a diameter of 6 mm is inserted therein, and the mixture is rotated at 500 rpm, 60
The winding height of the adhesive after 2 seconds was measured. The smaller the winding height, the better the fluidity.

【0048】また、BM型回転粘度計(ローターNo.3
×12rpm)を用い、20℃における粘度を測定し
た。
Further, a BM type rotational viscometer (rotor No. 3
The viscosity at 20 ° C. was measured using (× 12 rpm).

【0049】(3) 接着性 接着剤を幅25mmの二枚の帆布のうち、片方の帆布に刷
毛塗りし、60℃で10分間乾燥した後、互いに貼り合
わせてプレスする。
(3) Adhesiveness The adhesive is brush-coated on one of the two 25-mm wide canvases, dried at 60 ° C. for 10 minutes, and then laminated and pressed.

【0050】これを1時間養生後、20℃の雰囲気で引
張り試験機を用い200mm/分の引張速度で、T型剥離
強度(初期接着強度)を測定した。
After curing for 1 hour, the T-type peel strength (initial adhesive strength) was measured in a 20 ° C. atmosphere using a tensile tester at a tensile speed of 200 mm / min.

【0051】また、同様にして7時間養生後、20℃の
雰囲気で引張り試験機を用い200mm/分の引張速度
で、T型剥離強度(常態接着強度)を測定した。
Similarly, after curing for 7 hours, the T-type peel strength (normal adhesive strength) was measured at a tensile speed of 200 mm / min in a 20 ° C. atmosphere using a tensile tester.

【0052】また、同様にして7時間養生後、70℃の
雰囲気で引張り試験機を用い200mm/分の引張速度
で、T型剥離強度(耐熱接着強度)を測定した。
Similarly, after aging for 7 hours, the T-type peel strength (heat resistant adhesive strength) was measured in an atmosphere of 70 ° C. using a tensile tester at a tensile speed of 200 mm / min.

【0053】[0053]

【表1】 [Table 1]

【0054】表1から明らかなように、この発明の方法
で得られる接着剤は、片面塗布でも貼り合わせが可能
で、従来の開放型二本ロールでのゴムの素練り及び混練
りを行うものと比べ、分散性、流動性、初期接着性、常
態接着性、耐熱性等の接着剤性能において遜色はない。
As is clear from Table 1, the adhesive obtained by the method of the present invention can be pasted even by single-sided coating, and the conventional mastication and kneading of rubber by an open type two-roll roll is performed. Compared with, the adhesive properties such as dispersibility, fluidity, initial adhesiveness, normal-state adhesiveness, and heat resistance are comparable.

【0055】[0055]

【発明の効果】上述の通り、この発明の接着剤の製造方
法は、カルボキシル基を有するクロロプレンゴムチップ
を、金属酸化物からなる加硫剤を分散させた有機溶剤中
に、側壁に多数の流通穴を有する固定リングとその内側
に配設された回転羽根とから構成された高速強剪断型の
攪拌器により、攪拌しながら溶解させるものであり、そ
れにより、ゴムの素練り及び混練りを行うことなしに、
カルボキシル基を有するクロロプレンゴムチップを均一
に直接溶解させ、同時に金属酸化物との均質混合を行う
ことができる。
As described above, according to the method for producing an adhesive of the present invention, a chloroprene rubber chip having a carboxyl group is provided in an organic solvent in which a vulcanizing agent composed of a metal oxide is dispersed, and a large number of through holes are formed in the side wall. A high-speed strong-shear agitator composed of a fixed ring having a blade and a rotary vane disposed inside the agitator is used to dissolve with stirring, thereby performing mastication and kneading of rubber. Without,
The chloroprene rubber chip having a carboxyl group can be directly and uniformly dissolved, and at the same time, homogeneous mixing with the metal oxide can be performed.

【0056】それゆえ、この接着剤の製造方法によれ
ば、開放型二本ロールでのゴムの素練り及び混練りが省
かれ、しかも溶解時間も著しく短縮され、その生産性が
向上し、コストダウンが図れる。
Therefore, according to this method for producing an adhesive, mastication and kneading of rubber by the open type two-roll is omitted, and further, the melting time is remarkably shortened, the productivity is improved, and the cost is reduced. Can be down.

【0057】また、開放型二本ロールでのゴムの素練り
及び混練りのように作業者の感に頼る工程がないので、
作業がらくに行え、しかも接着剤の品質のばらつきが少
なく、品質が安定する。
Further, since there is no step of relying on the feeling of the operator such as mastication and kneading of rubber by the open type two rolls,
The work is easy, and the quality of the adhesive is stable and the quality is stable.

【0058】さらに、開放型二本ロールで混練りされた
ゴム組成物は加硫が進行しやすいので、その日のうちに
有機溶剤に溶解させねばならないが、この発明の方法で
はこのような制限がなく、製造工程の組み換えなどが自
由にできるという利点がある。
Further, since the rubber composition kneaded by the open type two rolls is vulcanized easily, it must be dissolved in an organic solvent within the same day, but the method of the present invention has such a limitation. However, there is an advantage that the manufacturing process can be freely changed.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明に用いる高速強剪断型の攪拌器の一例
を示す斜視図である。
FIG. 1 is a perspective view showing an example of a high speed strong shearing type agitator used in the present invention.

【符号の説明】[Explanation of symbols]

10 固定リング(ステーター) 12 流通孔(スロット) 13 取付け用の鍔 20 回転羽根(ローター) 21 回転軸 30 フランジ 31 固定用の棒 10 Fixing Ring (Stator) 12 Circulation Hole (Slot) 13 Collar for Mounting 20 Rotating Blade (Rotor) 21 Rotating Shaft 30 Flange 31 Fixing Rod

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 カルボキシル基を有するクロロプレンゴ
ムチップを、金属酸化物からなる加硫剤を分散させた有
機溶剤中に、側壁に多数の流通穴を有する固定リングと
その内側に配設された回転羽根とから構成された高速強
剪断型の攪拌器により、攪拌しながら溶解させることを
特徴とする溶剤型クロロプレン系接着剤の製造方法。
1. A chloroprene rubber chip having a carboxyl group, an organic solvent in which a vulcanizing agent made of a metal oxide is dispersed, and a fixed ring having a large number of through holes on its side wall, and a rotary blade arranged inside the fixed ring. A method for producing a solvent-type chloroprene-based adhesive, characterized in that the solvent-type chloroprene-based adhesive is dissolved by stirring with a high-speed strong-shear agitator composed of.
JP9526192A 1992-04-15 1992-04-15 Preparation of solvent-type chloroprene-based adhesive Pending JPH05295336A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9526192A JPH05295336A (en) 1992-04-15 1992-04-15 Preparation of solvent-type chloroprene-based adhesive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9526192A JPH05295336A (en) 1992-04-15 1992-04-15 Preparation of solvent-type chloroprene-based adhesive

Publications (1)

Publication Number Publication Date
JPH05295336A true JPH05295336A (en) 1993-11-09

Family

ID=14132829

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9526192A Pending JPH05295336A (en) 1992-04-15 1992-04-15 Preparation of solvent-type chloroprene-based adhesive

Country Status (1)

Country Link
JP (1) JPH05295336A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0814139A1 (en) * 1996-06-17 1997-12-29 Premark RWP Holdings, Inc. Method of improving the sprayability of polychloroprene contact adhesive
US6345775B1 (en) 1998-07-30 2002-02-12 Wilsoart International, Inc. Very high solid content aerosol delivery system
US6433051B1 (en) 1999-05-21 2002-08-13 Wilsonart International Very high solid content aerosol delivery system
US6635703B1 (en) 1998-07-30 2003-10-21 Premark Rwp Holdings, Inc. Very high solids adhesive

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0814139A1 (en) * 1996-06-17 1997-12-29 Premark RWP Holdings, Inc. Method of improving the sprayability of polychloroprene contact adhesive
US6345775B1 (en) 1998-07-30 2002-02-12 Wilsoart International, Inc. Very high solid content aerosol delivery system
US6635703B1 (en) 1998-07-30 2003-10-21 Premark Rwp Holdings, Inc. Very high solids adhesive
US6433051B1 (en) 1999-05-21 2002-08-13 Wilsonart International Very high solid content aerosol delivery system
US6896205B2 (en) 1999-05-21 2005-05-24 Premark Rwp Holdings, Inc. Very high solid content aerosol delivery system

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