JPH0153898B2 - - Google Patents
Info
- Publication number
- JPH0153898B2 JPH0153898B2 JP22105282A JP22105282A JPH0153898B2 JP H0153898 B2 JPH0153898 B2 JP H0153898B2 JP 22105282 A JP22105282 A JP 22105282A JP 22105282 A JP22105282 A JP 22105282A JP H0153898 B2 JPH0153898 B2 JP H0153898B2
- Authority
- JP
- Japan
- Prior art keywords
- belt
- chloroprene rubber
- weight
- parts
- bismaleimide
- 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
Links
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 18
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 14
- 229920003192 poly(bis maleimide) Polymers 0.000 claims description 12
- XQUPVDVFXZDTLT-UHFFFAOYSA-N 1-[4-[[4-(2,5-dioxopyrrol-1-yl)phenyl]methyl]phenyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C(C=C1)=CC=C1CC1=CC=C(N2C(C=CC2=O)=O)C=C1 XQUPVDVFXZDTLT-UHFFFAOYSA-N 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 229920001971 elastomer Polymers 0.000 claims description 7
- 239000011787 zinc oxide Substances 0.000 claims description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 6
- 239000000395 magnesium oxide Substances 0.000 claims description 6
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 6
- 229910000464 lead oxide Inorganic materials 0.000 claims description 4
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 claims description 4
- YACLQRRMGMJLJV-UHFFFAOYSA-N chloroprene Chemical compound ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 claims description 3
- 238000012545 processing Methods 0.000 description 11
- 230000032683 aging Effects 0.000 description 9
- 238000004132 cross linking Methods 0.000 description 9
- 229910044991 metal oxide Inorganic materials 0.000 description 8
- 150000004706 metal oxides Chemical class 0.000 description 8
- 230000000704 physical effect Effects 0.000 description 8
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 238000004073 vulcanization Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000003860 storage Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000004636 vulcanized rubber Substances 0.000 description 2
- OPNUROKCUBTKLF-UHFFFAOYSA-N 1,2-bis(2-methylphenyl)guanidine Chemical compound CC1=CC=CC=C1N\C(N)=N\C1=CC=CC=C1C OPNUROKCUBTKLF-UHFFFAOYSA-N 0.000 description 1
- UTRLJOWPWILGSB-UHFFFAOYSA-N 1-[(2,5-dioxopyrrol-1-yl)methoxymethyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1COCN1C(=O)C=CC1=O UTRLJOWPWILGSB-UHFFFAOYSA-N 0.000 description 1
- PUKLCKVOVCZYKF-UHFFFAOYSA-N 1-[2-(2,5-dioxopyrrol-1-yl)ethyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1CCN1C(=O)C=CC1=O PUKLCKVOVCZYKF-UHFFFAOYSA-N 0.000 description 1
- UFFVWIGGYXLXPC-UHFFFAOYSA-N 1-[2-(2,5-dioxopyrrol-1-yl)phenyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C1=CC=CC=C1N1C(=O)C=CC1=O UFFVWIGGYXLXPC-UHFFFAOYSA-N 0.000 description 1
- FJKKJQRXSPFNPM-UHFFFAOYSA-N 1-[3-(2,5-dioxopyrrol-1-yl)-4-methylphenyl]pyrrole-2,5-dione Chemical compound CC1=CC=C(N2C(C=CC2=O)=O)C=C1N1C(=O)C=CC1=O FJKKJQRXSPFNPM-UHFFFAOYSA-N 0.000 description 1
- IPJGAEWUPXWFPL-UHFFFAOYSA-N 1-[3-(2,5-dioxopyrrol-1-yl)phenyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C1=CC=CC(N2C(C=CC2=O)=O)=C1 IPJGAEWUPXWFPL-UHFFFAOYSA-N 0.000 description 1
- AQGZJQNZNONGKY-UHFFFAOYSA-N 1-[4-(2,5-dioxopyrrol-1-yl)phenyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C1=CC=C(N2C(C=CC2=O)=O)C=C1 AQGZJQNZNONGKY-UHFFFAOYSA-N 0.000 description 1
- PYVHLZLQVWXBDZ-UHFFFAOYSA-N 1-[6-(2,5-dioxopyrrol-1-yl)hexyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1CCCCCCN1C(=O)C=CC1=O PYVHLZLQVWXBDZ-UHFFFAOYSA-N 0.000 description 1
- KADUIHUQIOHQER-UHFFFAOYSA-N 1-[[5-tert-butyl-3-[(2,5-dioxopyrrol-1-yl)methyl]-2-hydroxyphenyl]methyl]pyrrole-2,5-dione Chemical compound OC=1C(CN2C(C=CC2=O)=O)=CC(C(C)(C)C)=CC=1CN1C(=O)C=CC1=O KADUIHUQIOHQER-UHFFFAOYSA-N 0.000 description 1
- 241001441571 Hiodontidae Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 125000002993 cycloalkylene group Chemical group 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- -1 oxydimethylene group Chemical group 0.000 description 1
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 125000001174 sulfone group Chemical group 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 description 1
- 229960002447 thiram Drugs 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Description
本発明はクロロプレンゴム組成物に関し、詳し
くは、加工安全性を損なうことなく、高い架橋度
を有する加硫クロロプレンゴムを得ることができ
るクロロプレンゴム組成物に関する。
従来、クロロプレンゴムは、硫黄変性タイプの
場合、一般に加硫剤として酸化亜鉛と酸化マグネ
シウムとが用いられ、非硫黄変性の場合は、上記
金属酸化物に加えて加硫促進剤が併用されてい
る。しかしながら、上記のような加硫剤により加
硫されたクロロプレンゴム製品、例えば、自動車
用ベルトは走行中に摩擦や摩耗によつて粘着性を
有するに至る。その理由は必ずしも明らかではな
いが、プーリー側面に接触するベルトがその接触
面において、加硫ゴムベルト中に存在する低分子
物質の劣化や分解が生じるからであるといわれて
おり、このように摩擦摩耗時にベルトが粘着性を
有するようになると、プーリーに粘着物質が付着
して、ベルト表面とプーリーとの間の摩擦係数が
大きくなり、ベルト表面に大きい摩擦力が作用す
る結果、更にベルトが摩耗すると共に、ベルト寿
命も大幅に短くなる。また、プーリー底部に粘着
物が塊状に堆積し、ベルトの正常な駆動を妨げる
と共に、ベルトを押圧してベルトを損傷させるこ
ともある。
既に、クロロプレンゴム組成物において、硫
黄、テトラメチルチウラムジスルフイド、ジオル
ソトリルグアニジン等の加硫促進剤を配合し、又
は酸化亜鉛を増量して、加硫物における架橋度を
高めることにより、上記のような粘着性の問題が
一部解決され得ることは知られているが、しか
し、かかる方法によると、スコーチ時間が短縮さ
れて、加工安全性が低下し、更に、加硫物の物
性、例えば、耐熱老化性が低下するという問題が
ある。
本発明者は、上記した問題を解決するために鋭
意研究した結果、上記のような金属酸化物加硫剤
と共にビスマレイミドを併用することにより、ク
ロロプレンゴム未加硫物の加工安全性を確保しつ
つ、その加硫物における架橋度を高めると共に、
耐熱老化性等の加硫物物性を改善することがで
き、更に、ベルトのような製品における前記粘着
性の問題をも解決し得ることを見出して本発明に
至つたものである。
本発明によるクロロプレンゴム組成物は、クロ
ロプレンゴム100重量部について、酸化亜鉛、酸
化マグネシウム及び酸化鉛から選ばれる少なくと
も１種の加硫剤１〜20重量部と、ビスマレイミド
0.5〜10重量部とを含有することを特徴とする。
本発明においてクロロプレンゴムは、硫黄変性
及び非硫黄変性のいずれのタイプであつてもよい
が、特に、硫黄変性タイプの場合にその加工安全
性を確保しつつ架橋度を高めて、耐熱老化性等の
加硫物物性を改善する効果が顕著である。
本発明におけるクロロプレンゴム組成物は、加
硫剤成分として、クロロプレンゴム100重量部に
ついて酸化亜鉛、酸化マグネシウム及び酸化鉛か
ら選ばれる少なくとも１種の金属酸化物１〜20重
量部、好ましくは２〜15重量部を含有する。これ
ら金属酸化物加硫剤が１重量部よりも少ないとき
は、クロロプレンゴムの架橋が十分に行なわれ
ず、加硫物が耐熱老化性ほか加硫物性に劣る。一
方、20重量部よりも多い場合は、金属酸化物が酸
化亜鉛のときは、配合生地の所謂腰が落ちて、柔
らかくなると同時に貯蔵安定性も悪くなる。ま
た、酸化マグネシウムのときは、加硫速度が非常
に遅くなる問題が生じる。酸化鉛のときは、加工
安全性、貯蔵安定性等が損なわれる問題が生じ
る。尚、本発明においては、特に好ましくは、酸
化亜鉛と酸化マグネシウムとが併用され、その配
合量はそれぞれクロロプレンゴム100重量部につ
いて３〜８重量部である。
また、本発明において用いるビスマレイミド
は、二つの窒素原子が直接に結合されたＮ，
N′−連結ビスマレイミド及び二つの窒素がアル
キレン基、シクロアルキレン基、オキシジメチレ
ン基、フエニレン基、スルホン基、その他の二価
の有機基で結合されているビスマレイミドを含
み、これらの具体例として、Ｎ，N′−エチレン
ビスマレイミド、Ｎ，N′−ヘキサメチレンビス
マレイミド、Ｎ，N′−（１，４−フエニレン）ジ
マレイミド、Ｎ，N′−（ｏ−フエニレン）ジマレ
イミド、Ｎ，N′−（ｍ−フエニレン）ジマレイミ
ド、Ｎ，N′−（２，４−トリレン）ジマレイミ
ド、Ｎ，N′−（デユリレンジマレイミド、Ｎ，
N′−〔４，4′（２，2′−ジクロロビフエニレン）〕
ジマレイミド、Ｎ，N′−〔４，4′−メチレンジフ
エニル〕ジマレイミド、Ｎ，N′−（１，４−デユ
リレンジエチレン）ジマレイミド、Ｎ，N′−
〔４，4′−スルホニルジフエニル〕ジマレイミド、
２，６−ビス（マレイミドメチル）−４−ｔ−ブ
チルフエノール、Ｎ，N′−オキシジメチレンジ
マレイミド等を挙げることができる。
上記のようなビスマレイミドは、ゴム100重量
部について0.5〜10重量部用いられる。ビスマレ
イミドが0.5重量部よりも少ないときは、前記金
属酸化物加硫剤と併用してもクロロプレンゴム組
成物未加硫物の加工安全性を確保しつつ、その加
硫物における架橋度を高める効果に欠け、一方、
10重量部よりも多く配合するときは、ビスマレイ
ミドのブルームが認められるようになるからであ
る。
本発明によるクロロプレンゴム組成物は、上記
した金属酸化物加硫剤及びビスマレイミドを含有
するほかに、従来よりクロロプレンゴム組成物に
配合される加硫促進剤、充填剤、滑剤、老化防止
剤、可塑剤等を含有していてもよい。これらの配
合物の配合量はクロロプレンゴム組成物について
既によく知られている。
以上のように、本発明のクロロプレンゴム組成
物によれば、前記金属酸化物加硫剤と共にビスマ
レイミドを併用するので、この結果、未加硫物の
加工安全性を確保しつつ、加硫物における耐熱老
化性等の物性を改善することができ、更に、摩擦
摩耗時にも粘着性を有しないので、ベルトの製造
等に好適に使用することができる。
以下に実施例を挙げて本発明を説明するが、本
発明はこれら実施例により何ら限定されるもので
はない。
実施例 １
常法により第１表に示す組成のクロロプレンゴ
ム組成物を調製し、未加硫ゴムの物性及び153℃
で40分間プレス加硫して得た加硫物の物性を調べ
た。結果を第２表に示す。即ち、本発明のクロロ
プレンゴム組成物によれば、加硫物はトルエン膨
潤率及び貯蔵弾性率から架橋度が高いにもかかわ
らず、未加硫物においては、ムーニースコーチ時
間が長く、加工安全性にすぐれる。更に、熱老化
試験結果より耐熱老化性にすぐれることも明らか
である。比較例１のゴム組成物は加工安全性に劣
ると共に、ベルト粘着試験において粘着性を示
す。比較例２及び３は比較例１に比べて架橋度は
高く、ベルト粘着性も幾分改善されるが、加工安
全性又は耐熱老化性に劣ることが明らかである。
The present invention relates to a chloroprene rubber composition, and more particularly, to a chloroprene rubber composition capable of obtaining a vulcanized chloroprene rubber having a high degree of crosslinking without impairing processing safety. Conventionally, in the case of sulfur-modified chloroprene rubber, zinc oxide and magnesium oxide are generally used as vulcanizing agents, and in the case of non-sulfur-modified chloroprene rubber, a vulcanization accelerator is used in addition to the above metal oxides. . However, chloroprene rubber products, such as automobile belts, vulcanized with the above-mentioned vulcanizing agents become sticky due to friction and abrasion during running. The reason for this is not necessarily clear, but it is said that the low-molecular substances present in the vulcanized rubber belt deteriorate or decompose at the contact surface of the belt that comes into contact with the side of the pulley, resulting in friction and wear. Sometimes, when the belt becomes sticky, sticky substances adhere to the pulleys, increasing the coefficient of friction between the belt surface and the pulleys, and causing a large frictional force to act on the belt surface, resulting in further belt wear. At the same time, the belt life is also significantly shortened. In addition, sticky substances may accumulate in lumps on the bottom of the pulley, which may impede normal driving of the belt and may press the belt and cause damage to the belt. Already, in a chloroprene rubber composition, by incorporating a vulcanization accelerator such as sulfur, tetramethylthiuram disulfide, diorthotolyl guanidine, or by increasing the amount of zinc oxide, the degree of crosslinking in the vulcanizate is increased. It is known that the above-mentioned tack problems can be partially solved, but such methods shorten the scorch time, reduce processing safety, and further reduce the physical properties of the vulcanizate. For example, there is a problem that heat aging resistance decreases. As a result of intensive research to solve the above-mentioned problems, the inventors of the present invention have found that by using bismaleimide in combination with the above-mentioned metal oxide vulcanizing agent, processing safety of unvulcanized chloroprene rubber can be ensured. At the same time, increasing the degree of crosslinking in the vulcanizate,
The present invention was based on the discovery that the physical properties of vulcanizates such as heat aging resistance can be improved, and that the problem of stickiness in products such as belts can also be solved. The chloroprene rubber composition according to the present invention contains 1 to 20 parts by weight of at least one vulcanizing agent selected from zinc oxide, magnesium oxide, and lead oxide, and bismaleimide based on 100 parts by weight of chloroprene rubber.
0.5 to 10 parts by weight. In the present invention, the chloroprene rubber may be of either sulfur-modified or non-sulfur-modified type, but in particular, in the case of sulfur-modified type, the degree of crosslinking is increased while ensuring processing safety, and heat aging resistance etc. The effect of improving the physical properties of the vulcanizate is remarkable. The chloroprene rubber composition of the present invention contains 1 to 20 parts by weight, preferably 2 to 15 parts by weight of at least one metal oxide selected from zinc oxide, magnesium oxide, and lead oxide per 100 parts by weight of chloroprene rubber as a vulcanizing agent component. Contains parts by weight. If the amount of these metal oxide vulcanizing agents is less than 1 part by weight, the chloroprene rubber will not be sufficiently crosslinked, and the vulcanizate will have poor heat aging resistance and other vulcanized physical properties. On the other hand, if the amount is more than 20 parts by weight, when the metal oxide is zinc oxide, the blended dough will have a so-called stiffness, become soft, and have poor storage stability. Further, when using magnesium oxide, there arises a problem that the vulcanization rate is extremely slow. When using lead oxide, there arises a problem that processing safety, storage stability, etc. are impaired. In the present invention, zinc oxide and magnesium oxide are particularly preferably used in combination, and the amount of each is 3 to 8 parts by weight per 100 parts by weight of chloroprene rubber. In addition, the bismaleimide used in the present invention is N, in which two nitrogen atoms are directly bonded,
N′-linked bismaleimides and bismaleimides in which two nitrogens are bonded by an alkylene group, cycloalkylene group, oxydimethylene group, phenylene group, sulfone group, or other divalent organic group; specific examples thereof as, N,N'-ethylene bismaleimide, N,N'-hexamethylene bismaleimide, N,N'-(1,4-phenylene) dimaleimide, N,N'-(o-phenylene) dimaleimide, N,N '-(m-phenylene) dimaleimide, N,N'-(2,4-tolylene) dimaleimide, N,N'-(dulylene dimaleimide, N,
N′-[4,4′(2,2′-dichlorobiphenylene)]
Dimaleimide, N,N'-[4,4'-methylenediphenyl]dimaleimide, N,N'-(1,4-dulylene diethylene)dimaleimide, N,N'-
[4,4′-sulfonyldiphenyl]dimaleimide,
Examples include 2,6-bis(maleimidomethyl)-4-t-butylphenol and N,N'-oxydimethylene dimaleimide. Bismaleimide as described above is used in an amount of 0.5 to 10 parts by weight per 100 parts by weight of rubber. When the amount of bismaleimide is less than 0.5 parts by weight, even when used in combination with the metal oxide vulcanizing agent, it increases the degree of crosslinking in the vulcanized product while ensuring processing safety of the unvulcanized product of the chloroprene rubber composition. Lacking effectiveness, on the other hand,
This is because when more than 10 parts by weight is added, bloom of bismaleimide is observed. The chloroprene rubber composition according to the present invention contains, in addition to the metal oxide vulcanizing agent and bismaleimide described above, vulcanization accelerators, fillers, lubricants, anti-aging agents, which are conventionally incorporated into chloroprene rubber compositions, It may also contain a plasticizer and the like. The loadings of these compounds are already well known for chloroprene rubber compositions. As described above, according to the chloroprene rubber composition of the present invention, since bismaleimide is used together with the metal oxide vulcanizing agent, as a result, while ensuring the processing safety of unvulcanized products, It can improve the physical properties such as heat aging resistance, and also has no tackiness even during frictional abrasion, so it can be suitably used for belt manufacturing and the like. The present invention will be explained below with reference to Examples, but the present invention is not limited to these Examples in any way. Example 1 A chloroprene rubber composition having the composition shown in Table 1 was prepared by a conventional method, and the physical properties of unvulcanized rubber and temperature at 153°C
The physical properties of the vulcanized product obtained by press vulcanization for 40 minutes were investigated. The results are shown in Table 2. That is, according to the chloroprene rubber composition of the present invention, although the vulcanized product has a high degree of crosslinking based on the toluene swelling rate and storage modulus, the unvulcanized product has a long Mooney scorch time and has poor processing safety. Excellent. Furthermore, it is clear from the heat aging test results that it has excellent heat aging resistance. The rubber composition of Comparative Example 1 has poor processing safety and exhibits tackiness in the belt tack test. Comparative Examples 2 and 3 have a higher degree of crosslinking than Comparative Example 1, and belt tackiness is somewhat improved, but it is clear that processing safety or heat aging resistance is inferior.
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】
比較例４はビスマレイミドのみによつて加硫し
た場合であつて、トルエン膨張試験の結果から架
橋度が著しく小さく、加硫物自体が既に粘着性を
有して、顕著なベルト粘着性を示し、更に、耐熱
老化性にも著しく劣る。
尚、ベルト粘着試験は、図面に示したように、
ベルトの長手方向に延びるリブ１を有する保持弾
性体層２と接着弾性体層３とからなり、接着弾性
体層に抗張体４が長手方向に埋設され、ベルト表
面に外被層５を有するRMA（Rubber
Manufcturers Associaticn、米国）規格による
長さ975mmのＫ型３リブベルト（ピツチSg＝3.56
mm、リブ高さhr＝2.9mm、ベルト厚さhb＝5.3mm、
リブ角度40゜）を直径60mmのプーリーに３軸に架
設し、死荷重90ポンド、2000rpm、４％強制スリ
ツプの条件下に１時間走行させて、粘着性を調べ
た。
次に、常法により第３表に示すクロロプレンゴ
ム組成物を調製し、同様に未加硫物及び加硫物の
物性を調べた。結果を第４表に示す。これらのゴ
ム組成物も、架橋度が高く、ベルト粘着性を示さ
ないと共に、加工安全性が改善されていることが
明らかである。[Table] Comparative Example 4 was a case in which vulcanization was performed only with bismaleimide, and the results of the toluene expansion test showed that the degree of crosslinking was extremely small, and the vulcanizate itself already had tackiness, resulting in significant belt tack. Furthermore, it exhibits extremely poor heat aging resistance. In addition, the belt adhesion test was performed as shown in the drawing.
The belt consists of a holding elastic layer 2 having ribs 1 extending in the longitudinal direction of the belt, and an adhesive elastic layer 3, a tensile member 4 is embedded in the adhesive elastic layer in the longitudinal direction, and an outer covering layer 5 is provided on the belt surface. RMA (Rubber)
Manufacturers Associaticn, USA) 975mm long K-shaped 3-rib belt (pitch Sg = 3.56)
mm, rib height hr=2.9mm, belt thickness hb=5.3mm,
A rib angle of 40°) was mounted on a pulley with a diameter of 60 mm on three axes, and the adhesive was examined by running it for 1 hour under the conditions of a dead load of 90 pounds, 2000 rpm, and 4% forced slip. Next, chloroprene rubber compositions shown in Table 3 were prepared by a conventional method, and the physical properties of the unvulcanized product and the vulcanized product were similarly examined. The results are shown in Table 4. It is clear that these rubber compositions also have a high degree of crosslinking, exhibit no belt tackiness, and have improved processing safety.
図面は本発明のゴム組成物の加硫ゴムからな
り、ベルト粘着性試験に供したベルトを示す断面
図である。
１……リブ、２……保持弾性体層、３……接着
弾性体層、４……抗張体、５……外被層。
The drawing is a sectional view showing a belt made of vulcanized rubber of the rubber composition of the present invention and subjected to a belt adhesion test. DESCRIPTION OF SYMBOLS 1... Rib, 2... Holding elastic body layer, 3... Adhesive elastic body layer, 4... Tensile body, 5... Outer covering layer.
Claims (1)
亜鉛、酸化マグネシウム及び酸化鉛から選ばれる
少なくとも１種の加硫剤１〜20重量部と、ビスマ
レイミド0.5〜10重量部とを含有することを特徴
とするクロロプレンゴム組成物。1. A chloroprene containing 1 to 20 parts by weight of at least one vulcanizing agent selected from zinc oxide, magnesium oxide, and lead oxide and 0.5 to 10 parts by weight of bismaleimide per 100 parts by weight of chloroprene rubber. Rubber composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22105282A JPS59109541A (en) | 1982-12-15 | 1982-12-15 | Chloroprene rubber composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22105282A JPS59109541A (en) | 1982-12-15 | 1982-12-15 | Chloroprene rubber composition |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31206390A Division JPH04191545A (en) | 1990-11-16 | 1990-11-16 | Belt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59109541A JPS59109541A (en) | 1984-06-25 |
| JPH0153898B2 true JPH0153898B2 (en) | 1989-11-16 |
Family
ID=16760736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22105282A Granted JPS59109541A (en) | 1982-12-15 | 1982-12-15 | Chloroprene rubber composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59109541A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0815843B2 (en) * | 1985-04-16 | 1996-02-21 | 株式会社ブリヂストン | Pneumatic tire with improved durability |
| JP4531204B2 (en) * | 2000-01-28 | 2010-08-25 | 電気化学工業株式会社 | Chloroprene-based rubber composition |
| CN102952343B (en) * | 2012-10-11 | 2016-05-04 | 安徽普源分离机械制造有限公司 | A kind of sealing ring of horizontal spiral centrifuge propeller inwall |
-
1982
- 1982-12-15 JP JP22105282A patent/JPS59109541A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59109541A (en) | 1984-06-25 |
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