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Easily-processed and reinforced nitrile butadiene rubber and preparation method thereof

An easy-to-process technology for nitrile rubber, which is applied in the field of nitrile rubber and its preparation, and can solve the problems of no reinforcement 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 and has a good plasticizing effect, but has no reinforcing effect, and is used in products. prone to precipitation during the process

Method used

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  • Easily-processed and reinforced nitrile butadiene rubber and preparation method thereof
  • Easily-processed and reinforced nitrile butadiene rubber and preparation method thereof
  • Easily-processed and reinforced nitrile butadiene rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Mix anti-scorch agent 2-vinyl benzoic acid and reinforcing agent nitrile vinyl triethoxysilane at a molar ratio of 1.0:5.0, prepare a solution with a mass concentration of 30% with hexane solvent, and add anti-scorch to the solution Olefin metathesis catalysts at 0.1% of the total amount of coking agent and reinforcing agent Air and water were isolated, and after reacting at room temperature for 8 hours, the solvent was removed by a vacuum desolventizer to obtain anti-scorch rubber reinforcing agent 1-1.

[0041] Dissolve 100 parts of nitrile rubber NBR3305 in chloroform solvent and prepare a 1.3% concentration solution, add 0.66 parts of olefin metathesis catalyst And 13 parts of anti-scorch rubber reinforcing agent 1-1, at 15.9 ℃ isolated from air and water, reacted for 0.53 hours, the reacted glue solution was removed by solvent to obtain a reinforcing plasticizer, and its Mn was measured to be 6800.

[0042] Mix 100 parts of nitrile rubber NBR3305 on an open mill...

Embodiment 2

[0047] Mix anti-scorch agent 3-vinylphthalic acid and reinforcing agent vinyldiethoxymethylsilane at a molar ratio of 1.0:0.1, prepare a solution with 1% mass concentration with hexane solvent, add to the solution Olefin metathesis catalysts accounting for 0.01% of the total amount of anti-scorch agents and reinforcing agents 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 reinforcing agent 2-1.

[0048] Dissolve 100 parts of nitrile rubber NBR3305 in acetone solvent to prepare a 10% concentration solution, add 0.9 parts of olefin metathesis catalyst and 48 parts of anti-scorch rubber reinforcing agent 2-1, isolated from air and water at 49°C, and reacted for 4.6 hours. After the reaction, the glue solution was removed by solvent to obtain a reinforced plasticizer product, and its Mn was measured to be 3100 .

[0049] Mix 100 parts of nitrile rubber NBR3305 and 14 parts...

Embodiment 3

[0055] Mix the anti-scorch agent 3-vinylphthalic acid and the reinforcing agent vinyltrimethoxysilane at a molar ratio of 1.0:4.0, prepare a 10% mass concentration solution with hexane solvent, add anti-scorch 0.09% of the total substance amount of agent and reinforcing agent for olefin metathesis catalyst 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 reinforcing agent 3-1.

[0056] Dissolve 100 parts of nitrile rubber NBR2907 base rubber in chlorobenzene solvent to prepare a 3.5% concentration solution, add 0.53 parts of olefin metathesis catalyst and 25.6 parts of anti-scorch rubber reinforcing agent 3-1, and reacted for 2.5 hours at 25°C without air and water. After the reaction, the glue solution was removed by solvent to obtain a reinforcing plasticizer.

[0057] Mix 100 parts of nitrile rubber NBR2907 and 30 parts of the prepared reinforcing plasticizer on an internal m...

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Abstract

The invention provides an easily-processed and reinforced nitrile butadiene rubber and a preparation method thereof. According to the present invention, the easily-processed and reinforced nitrile butadiene rubber contains a base rubber and a reinforced plasticizer, and is prepared through a mixing technology, wherein an olefin double-decomposition catalyst and a coke-proof rubber reinforcing agent are added to a nitrile butadiene rubber and a reaction is performed to obtain the reinforced plasticizer; and compared to the base rubber, the easily-processed and reinforced nitrile butadiene rubber product of the present invention has the following characteristics (calculated as the plasticizer adding amount) that the Mooney viscosity is reduced by 0.5 unit / part, the tensile strength is increased by more than 0.05 MPa / part, and the scorching time is delayed by 1-15 s / part.

Description

technical field [0001] The invention relates to a nitrile rubber and a preparation method thereof, in particular to a reinforced and easy-to-process nitrile rubber and a preparation method thereof. Background technique [0002] Emulsion polymerized nitrile rubber raw rubber Mooney viscosity is generally 40-100ML 1+4 100℃ , the mixed rubber Mooney generally requires less than 90ML 1+4 100℃ The strength of raw rubber is low, generally only 4.5±0.5MPa, and its strength is mainly improved by the reinforcing agent in the post-processing process, generally up to 20.5-26.5MPa. Reinforcing agents mainly include inorganic powders such as carbon black, white carbon black, nano-calcium carbonate, and montmorillonite. The self-agglomeration of inorganic powders is relatively serious, and high energy is required to realize the mixing with rubber. Repeated kneading and mixing for a long time on a machine or internal mixer. In the refining or banburying process, it is generally necess...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08L13/00C08C19/08C08C19/28
CPCC08C19/08C08C19/28C08C2019/09C08L9/02C08L13/00
Inventor 艾纯金付含琦邵卫朱玲朱晶吴宇王涛龚光碧赵旭涛梁滔李树毅陈建刚李晶郑聚成李猛刘鹏
Owner PETROCHINA CO LTD
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