Highly saturated copolymer rubber containing nitrile group

A copolymer and rubber technology, applied in the field of nitrile-containing highly saturated copolymer rubber, to achieve the balance of oil resistance and cold resistance, excellent compression set resistance, and good normal physical properties.

Active Publication Date: 2016-08-03
ZEON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With this composition, a rubber cross-linked product with improved heat resistance and compression set can be obtained, but cold resistance is still expected to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0065] Hereinafter, the present invention will be further described based on detailed examples, but the present invention is not limited by these examples. Hereinafter, unless otherwise specified, "parts" are based on weight. Tests and evaluations were performed as follows.

[0066] Composition of highly saturated copolymer rubber containing nitrile group

[0067] The content ratio of each monomer unit constituting the nitrile group-containing highly saturated copolymer rubber was measured in the following manner.

[0068] That is, the content ratio of mono-n-butyl maleate unit is to add 100mL of 2-butanone, 20mL of ethanol and 10mL of water to 0.2g of 2mm square nitrile group-containing highly saturated copolymer rubber, and use 0.02N of potassium hydroxide while stirring. Aqueous ethanol solution, at room temperature, titrate with thymolphthalein as indicator, find out the mole number of carboxyl in 100g containing nitrile group highly saturated copolymer rubber, convert...

Synthetic example 1

[0085] Add 180 parts of ion-exchanged water, 25 parts of sodium dodecylbenzenesulfonate aqueous solution with a concentration of 10% by weight, 20 parts of acrylonitrile, 4.5 parts of mono-n-butyl maleate, 35.5 parts of methoxymethacrylate in a metal bottle. ethyl ester and 0.5 parts of tert-dodecylmercaptan (molecular weight regulator), the internal gas was replaced with nitrogen three times, and then 40 parts of 1,3-butadiene was added. The metal bottle was kept at 5° C., 0.1 part of cumene hydroperoxide (polymerization initiator) was added, and a polymerization reaction was performed for 16 hours while rotating the metal bottle. Next, add 0.1 parts of hydroquinone aqueous solution (polymerization inhibitor) with a concentration of 10% by weight to stop the polymerization reaction, and then use a rotary evaporator with a water temperature of 60° C. to remove residual monomers to obtain 21.3% by weight of acrylonitrile units, 5.0% by weight of maleic acid Latex of nitrile-bas...

Synthetic example 2

[0089]Make the use amount of acrylonitrile, mono-n-butyl maleate, methoxyethyl acrylate and 1,3-butadiene the amount shown in Table 1, except that it is the same as Synthetic Example 1 to obtain nitrile-containing Based highly saturated copolymer rubber (A2). Table 1 shows the content ratio of each monomer unit constituting the obtained nitrile group-containing highly saturated copolymer rubber (A2), iodine value, and polymer Mooney viscosity.

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PUM

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Abstract

The invention provides highly saturated copolymer rubber containing nitrile groups, which has 5-60% by weight α, β-ethylenically unsaturated nitrile monomer unit (a), 0.1-20% by weight α , β-ethylenically unsaturated dicarboxylic acid monoester monomer unit (b), 11-50% by weight of an alkoxyalkyl group having 2-8 carbon atoms (meth)acrylic acid alkoxyalkyl ester The monomer unit (c), and 20-83.9% by weight of the conjugated diene monomer unit (d), and at least a part of the conjugated diene monomer unit (d) is hydrogenated.

Description

technical field [0001] The present invention relates to a highly saturated nitrile group-containing copolymer rubber, more specifically, to a highly saturated nitrile group-containing copolymer that can obtain a cross-linked product with good physical properties in normal state, excellent compression set resistance, and a high balance between oil resistance and cold resistance material rubber. Background technique [0002] Highly saturated copolymer rubber containing nitrile groups represented by hydrogenated acrylonitrile / butadiene copolymer rubber and acrylonitrile / butadiene copolymer rubber, etc., which have more carbon-carbon unsaturated bonds in the main chain structure Compared with conventional nitrile group-containing copolymer rubber, it is superior in heat resistance, oil resistance, ozone resistance, etc. [0003] As the composition of the above-mentioned nitrile group-containing highly saturated copolymer rubber, for example, in Patent Document 1, a highly satur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F8/04C08C19/02C08F236/04C08K5/17C08L13/00
CPCC08C19/02C08F220/44C08F222/16C08K5/17C08L13/00C08L15/005C08F220/281C08F220/26
Inventor 饭塚崇
Owner ZEON CORP
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