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Preparation method of liquid butadiene-acrylonitrile rubber with high nitrile content

A liquid nitrile rubber and content technology, which is applied in the field of preparation of high nitrile content liquid nitrile rubber, can solve the problems of unutilized carbon nanotube functionalized emulsion and the like, and achieve the effects of good viscosity performance, convenient operation and good performance.

Active Publication Date: 2014-03-12
之江(四川)高新材料应用技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0027] In the above patents, in the dispersion process of carbon nanotubes, the surface of carbon nanotubes is first acidified, acylated and other surface treatments are used, and functional emulsions enhanced by carbon nanotubes are not used in the preparation or modification of liquid rubber.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Embodiment 1, a kind of preparation method of high nitrile content liquid nitrile rubber, carry out the following steps successively:

[0085] The following parts are all parts by weight.

[0086] ①, the dispersion of carbon nanotubes:

[0087] Add 0.3 parts of carbon nanotubes and 5 parts of water into the high-speed disperser, and stir for 30 minutes at a stirring speed of 100 rpm, so that the carbon nanotubes are uniformly dispersed.

[0088] ②, the preparation of functional composite emulsion:

[0089] Take the dispersed carbon nanotubes (that is, all the steps ① obtained) and add them to a reactor containing 0.5 parts of methyl methacrylate, 0.8 parts of potassium disproportionated rosinate and 4 parts of water, and the temperature is controlled to be 50°C, and the temperature is kept at 50°C. For 2 hours, the carbon nanotubes were coated and polymerized by methyl methacrylate, which was used as a seed solution, and then 1 part of methyl methacrylate was added dr...

Embodiment 2

[0096] Embodiment 2, a kind of preparation method of high nitrile content liquid nitrile rubber, carry out the following steps successively:

[0097] The following parts are all parts by weight.

[0098] ①, the dispersion of carbon nanotubes:

[0099] Add 1 part of carbon nanotubes into a high-speed disperser, add 10 parts of water, and stir for 60 minutes at a stirring speed of 110 rpm to make the carbon nanotubes evenly dispersed.

[0100] ②, the preparation of functional composite emulsion:

[0101] Take the dispersed carbon nanotubes (that is, all the steps ① obtained) and add them to the reactor containing 1 part of methyl methacrylate, 0.5 part of potassium disproportionate rosinate and 6 parts of water, and the temperature is controlled to be 100 ° C, and the temperature is kept warm. 2 hours, so as to realize methyl methacrylate to coat and polymerize carbon nanotubes, use this as a seed solution, add 2 parts of methyl methacrylate dropwise, control the temperature t...

Embodiment 3

[0105] Embodiment 3, a kind of preparation method of high nitrile content liquid nitrile rubber, carry out the following steps successively:

[0106] The following parts are all parts by weight.

[0107] ①, the dispersion of carbon nanotubes:

[0108] Add 0.6 part of carbon nanotubes to the high-speed disperser, add 5 parts of water, and stir for 60 minutes at a stirring speed of 120 rpm to make the carbon nanotubes evenly dispersed.

[0109] ②, the preparation of functional composite emulsion:

[0110] Take the dispersed carbon nanotubes (that is, all the steps ① obtained) and add them to the reactor containing 2 parts of methyl methacrylate, 0.4 parts of disproportionated potassium rosinate and 8 parts of water, and the temperature is controlled to be 60° C. 2 hours, so that methyl methacrylate can coat and polymerize carbon nanotubes, which is used as a seed solution, and 3 parts of methyl methacrylate are added dropwise, and the temperature is kept at 60° C. for 8 hours ...

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Abstract

The invention discloses a preparation method of liquid butadiene-acrylonitrile rubber with a high nitrile content. The preparation method comprises the steps of mixing a carbon nano tube and water, stirring at a high speed to allow the carbon nano tube to be dispersed uniformly, adding the dispersed carbon nano tube in a reactor containing ester, an emolsifier and the water, controlling the temperature at 50-100 DEG C to allow the ester to coat and polymerize the carbon nano tube to form a seed solution, dropwise adding the ester to prepare functional composite emulsion, adding the water, acrylonitrile, cellulose and the emolsifier into a polymerization kettle, then adding butadiene and the functional composite emulsion, start the polymerization kettle to stir, then cooling the polymerization kettle, when cooling the polymerization kettle to 15-25 DEG C, adding an initiator and a molecular weight regulator, performing polymerization reaction for 10-16h, then adding a terminator, and allowing latex to be degassed and cohered to form a product. According to the liquid butadiene-acrylonitrile rubber with the high nitrile content prepared by the method, the mass percentage of combined acrylonitrile is 28-35%.

Description

technical field [0001] The invention relates to a preparation method of synthetic rubber, in particular to a preparation method of a high nitrile content liquid nitrile rubber. Background technique [0002] Since its discovery more than 10 years ago, carbon nanotubes have always been one of the hot spots in the field of nanomaterials research because of their unique structure and excellent properties. In addition to excellent mechanical and thermal properties, carbon nanotubes also have unique and excellent electrical properties. [0003] Liquid rubber is generally a viscous polymer with an index-average molecular weight of 500 to 10,000 and flowable at room temperature. Liquid rubber has fluidity at room temperature and a wide range of bulk viscosity. It can be vulcanized and formed by casting process. It is easy to process, easy to realize continuous and automated production, and does not require large equipment, which can improve productivity and reduce power consumption...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F265/04C08F236/12C08F236/06C08F2/26C08F2/38C08F4/40C08C19/00C08K13/06C08K9/10C08F220/14C08K3/04C08K7/00C08L51/00
Inventor 张华张超陈新志钱超叶传伟
Owner 之江(四川)高新材料应用技术研究院有限公司
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