Easily-processed and reinforced nitrile butadiene rubber preparation method

A nitrile-butadiene rubber and easy-to-process technology, applied in the field of nitrile-butadiene rubber preparation, can solve the problems of no reinforcement effect, easy precipitation and the like

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 rubb

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 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.

[0045] Dissolve nitrile rubber NBR3305 in chloroform solvent to prepare a 1.5%w solution, add 0.53 parts of olefin metathesis catalyst in 100 parts by mass of rubber and 19 parts of anti-scorch rubber reinforcing agent 1-1, isolated from air and water at 15.5°C, reacted for 0.53 hours, and the reacted glue solution was removed by solvent to obtain a reinforced plasticizer product with Mn of 2800;

[0046] Add 100 parts of the prepared reinforced plasticizer product...

Embodiment 2

[0055] 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.

[0056] Dissolve nitrile rubber NBR3305 in acetone solvent to prepare a 10%w solution, add 0.98 parts of olefin metathesis catalyst to 100 parts by mass of rubber and 48 parts of anti-scorch rubber reinforcing agent 2-1, isolated from air and water at 48.9°C, and reacted for 4.5 hours. After the reaction, the glue solution was removed by solvent to obtain a reinforcing plasticizer product with Mn of 3200;

[0057] Add 100 parts of the prepared reinforced plasticizer product, 19 ...

Embodiment 3

[0067] 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.

[0068] Dissolve nitrile rubber NBR2907 in chlorobenzene solvent to prepare a 5%w solution, add 0.54 parts of olefin metathesis catalyst based on 100 parts by mass of rubber and 25 parts of anti-scorch rubber reinforcing agent 3-1, isolated from air and water at 25°C, reacted for 2.5 hours, and the reacted glue solution was removed by solvent to obtain a reinforcing plasticizer product with Mn of 2400;

[0069] Add 100 parts of the prepared reinforced plasticizer product, 10 parts of emulsifier sodium abi...

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Abstract

The invention provides an easily-processed and reinforced nitrile butadiene rubber preparation method, which comprises: dissolving a nitrile butadiene rubber in a solvent to prepare a solution, addingan olefin double-decomposition catalyst and a coke-proof rubber reinforcing agent, and carrying out solvent removing on the rubber solution after the reaction to obtain a reinforced plasticizer; dispersing the reinforced plasticizer into a water body under the action of an emulsifier to form an emulsion; and mixing the emulsion and the nitrile butadiene latex, carrying out agglomeration, washing,and drying to prepare the easily-processed and reinforced nitrile butadiene rubber product. According to the present invention, with the plasticizer product, the Mooney viscosity of the basic rubbercan be reduced by 0.7 unit/part, the strength is increased by more than 0.08 MPa/part, and the scorching time is delayed by 1-15 s/part.

Description

technical field [0001] The invention relates to a preparation method of nitrile rubber, in particular to a preparation method of easy-to-process reinforced nitrile rubber. Background technique [0002] Emulsion polymerization nitrile rubber raw rubber Mooney viscosity is generally 40-130ML 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 necessary to add a certain am...

Claims

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Application Information

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IPC IPC(8): C08L9/04C08L15/00C08C19/08C08C19/00C08C19/25
CPCC08C19/00C08C19/08C08C19/25C08C2019/09C08L9/04C08L15/00
Inventor 艾纯金李昌伟邵卫燕鹏华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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