Crosslinkable nitrile rubber composition and rubber crosslinked product
A technology of rubber composition and cross-linking nitrile, which is applied in the direction of transmission belts, V-belts, hoses, etc., can solve the problems of insufficient heat generation and low tensile stress, and achieve excellent effects of low heat generation
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment
[0081] Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples. In addition, in the following, unless otherwise specified, "part" is based on weight. In addition, tests and evaluations are as follows.
[0082] The content ratio of each monomer unit forming a highly saturated nitrile rubber was measured by the following method.
[0083] That is, the content ratio of mono-n-butyl maleate unit and methacrylic acid unit was calculated by adding 100 ml of 2-butanone to 0.2 g of 2 mm square highly saturated nitrile rubber and stirring for 16 hours, Add 20ml of ethanol and 10ml of water, and while stirring, use a 0.02N aqueous ethanol solution of potassium hydroxide to titrate thymolphthalein as an indicator at room temperature, thereby obtaining the carboxyl group relative to 100g of highly saturated nitrile rubber. The number of moles is calculated by converting the obtained number of moles ...
Synthetic example 1
[0097] Synthesis example 1 (synthesis of highly saturated nitrile rubber (a-1))
[0098] 180 parts of ion-exchanged water, 25 parts of 10% by weight sodium dodecylbenzenesulfonate aqueous solution, 37 parts of acrylonitrile, 6 parts of mono-n-butyl maleate and 0.5 parts of t-dodecylbenzene Alkyl mercaptans (molecular weight modifiers) were successively charged into the reactor, and after replacing the gas in the interior with nitrogen three times, 57 parts of 1,3-butadiene were charged. The reactor was kept at 5° C., 0.1 part of cumene hydroperoxide (polymerization initiator) was charged, and the polymerization reaction was continued for 16 hours while stirring. Then, after adding 0.1 parts of hydroquinone aqueous solution (polymerization terminator) with a concentration of 10% by weight to terminate the polymerization reaction, use a rotary evaporator with a water temperature of 60° C. to remove residual monomers, thereby obtaining a product containing maleic acid. Latex o...
Synthetic example 2
[0101] Synthesis example 2 (synthesis of highly saturated nitrile rubber (a'-2))
[0102] In the reactor, 0.2 parts of sodium carbonate was dissolved in 200 parts of ion-exchanged water, and 2.25 parts of fatty acid potassium soaps (potassium salts of fatty acids) were added thereto to prepare a soap solution. Then, 37 parts of acrylonitrile and 0.47 parts of t-dodecyl mercaptan (molecular weight regulator) were sequentially charged into the soap solution, and after replacing the internal gas with nitrogen three times, 63 parts of of 1,3-butadiene. Next, the inside of the reactor was kept at 5° C., 0.1 part of cumene hydroperoxide (polymerization initiator), a reducing agent, and an appropriate amount of chelating agent were charged, and polymerization was carried out for 16 hours while keeping the temperature at 5° C. Then, add the concentration of 0.1 part and be 10% hydroquinone (polymerization terminator) aqueous solution and stop polymerization reaction, use the rotary...
PUM
| Property | Measurement | Unit |
|---|---|---|
| diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More