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Nitrile butadiene rubber anti-aging type plasticizer preparation method

A technology of rubber anti-aging agent and nitrile rubber, which is applied in the field of preparation of nitrile rubber plasticizers, and can solve the problems of no anti-aging effect and easy precipitation

Active Publication Date: 2018-03-27
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the plasticizers reported in the patent are ester plasticizers. This type of plasticizer has good compatibility with nitrile rubber, has a good plasticizing effect, and has no anti-aging effect. prone to precipitation

Method used

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  • Nitrile butadiene rubber anti-aging type plasticizer preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Mix anti-scorch agent 2-vinylbenzoic acid and anti-aging agent 2-cyanopropenylphenol with a molar ratio of 1.0:5.0, prepare a solution with 30% mass concentration with hexane solvent, add anti-scorch agent and 0.1% olefin metathesis catalyst on the total substance amount of antiaging agent Isolate air and water, react at room temperature for 8 hours, and use a vacuum desolventizer to remove the solvent to prepare anti-scorch rubber antioxidant 1-1.

[0036] Dissolving nitrile rubber NBR3305 in acetone solvent to prepare a 0.14% concentration solution, based on 100 parts by mass of rubber, adding a mass ratio of 0.81 parts of olefin metathesis catalyst and 16 parts of anti-scorch rubber anti-aging agent 1-1, separated from air and water at 15°C, and reacted for 0.5 hours. After the reaction, the glue solution was removed by solvent to obtain an anti-aging plasticizer product with Mn of 5500.

[0037] Add 10 parts of the anti-aging plasticizer to 100 parts of nitrile ru...

Embodiment 2

[0042] Mix anti-scorch agent 3-vinyl phthalic acid and anti-aging agent 2,4,6-triallyl phenol at a molar ratio of 1.0:0.1, prepare a solution with 1% mass concentration with hexane solvent, add to the solution Add 0.01% of the olefin metathesis catalyst accounting for the total amount of anti-scorch agent and anti-aging agent After isolating air and water and reacting at room temperature for 0.5 h, the solvent was removed by a vacuum desolventizer to obtain anti-scorch rubber antioxidant 2-1.

[0043] The nitrile rubber NBR3305 is dissolved in the chloroform solvent and is formulated into a 10% concentration solution, based on 100 parts by mass of rubber, adding a mass ratio of 1.1 parts of olefin metathesis catalyst and 50.2 parts of anti-scorch rubber anti-aging agent 2-1, at 50 ℃ isolated from air and water, react for 5 hours, the reacted glue solution is detached by solvent, and an anti-aging plasticizer product with Mn of 3000 is obtained.

[0044] 10 parts of this pla...

Embodiment 3

[0050] Mix anti-scorch agent 3-vinyl phthalic acid and anti-aging agent 2,6-diallyl-p-cresol at a molar ratio of 1.0:4.0, prepare a solution with 10% mass concentration with hexane solvent, and add it to the solution Add 0.09% of the olefin metathesis catalyst accounting for the total amount of anti-scorch agent and anti-aging agent Isolate air and water, react at room temperature for 4.5 hours, and use a vacuum desolventizer to remove the solvent to obtain anti-scorch rubber antioxidant 3-1.

[0051] Dissolve nitrile rubber NBR2907 base rubber in methyl ethyl ketone solvent to prepare a 2.5% concentration solution, based on 100 parts by mass of rubber, add a mass ratio of 1.4 parts of olefin metathesis catalyst And 25.9 parts of anti-scorch rubber anti-aging agent 3-1, at 25.1 ℃ isolated from air and water, react for 2.57 hours, the reacted glue solution is removed by solvent, and an anti-aging plasticizer product with Mn of 590 is obtained.

[0052] 30 parts of this plast...

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Abstract

The invention provides a nitrile butadiene rubber anti-aging type plasticizer preparation method, which comprises: dissolving a nitrile butadiene rubber in a solvent to prepare a solution, adding an olefin double-decomposition catalyst and a coke-proof rubber anti-aging agent, and carrying out solvent removing on the rubber solution after the reaction so as to obtain the anti-aging type plasticizer product. According to the present invention, after 1-100 parts of the anti-aging type plasticizer is added to the nitrile butadiene rubber NBR 3305 in the open mill, the test results show that the Mooney viscosity of the base rubber is reduced by 0.5 unit / part, and the tensile strength is reduced by 10-30% and the scorch time is delayed by 1-15 s / part in the presence of the anti-aging type plasticizer while the tensile strength is reduced by 40-60% in the absence of the anti-aging type plasticizer.

Description

technical field [0001] The invention relates to a preparation method of a nitrile rubber plasticizer, in particular to a low molecular weight nitrile rubber plasticizer with an anti-aging function. Background technique [0002] The rubber aging process is often accompanied by some remarkable phenomena, such as the appearance of long-term stored natural rubber becoming soft, sticky, and spots; rubber products are deformed, brittle, hard, cracked, moldy, and lose gloss and color changes, etc. In terms of physical properties, rubber has changes in swelling and rheological properties. In terms of mechanical properties, indicators such as tensile strength, elongation at break, impact strength, bending strength, compressibility, and elasticity will decrease. Generally, anti-aging agents are added during rubber coagulation and processing. Common anti-aging agents are easy to precipitate, and various load-type, reactive, and composite anti-aging agents are gradually applied. CN95...

Claims

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Application Information

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IPC IPC(8): C08C19/08C08C19/28C08L9/02C08L13/00
CPCC08C19/08C08C19/28C08C2019/09C08L9/02C08L2201/08C08L13/00
Inventor 艾纯金王锋李波赵洪国崔英郭珺孟令坤龚光碧赵旭涛梁滔李树毅陈建刚李晶郑聚成李昌伟刘鹏
Owner PETROCHINA CO LTD
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