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Isoprene rubber grafted maleic anhydride and preparation method thereof

A technology for grafting maleic anhydride and isoprene rubber, applied in the field of synthetic rubber, can solve the problems of increasing the industrialization process, reducing the industrialization process, increasing the difficulty of industrialization, etc., and achieves the effect of reducing the difficulty, reducing the process and small investment

Active Publication Date: 2016-07-20
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical scheme of the present invention is to pass through inert gas in the reaction existing in the prior art to increase the operation of industrialization, also increased the difficulty of industrialization simultaneously, and in existing maleic anhydride graft modified rubber-like material, There are disadvantages such as complex reactor process, large investment and complicated preparation steps, but a kind of isoprene rubber grafted maleic anhydride and its preparation method are proposed. This method does not feed inert gas and reduces the industrialization process.

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  • Isoprene rubber grafted maleic anhydride and preparation method thereof

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preparation example Construction

[0059] The preparation method of isoprene rubber grafted maleic anhydride of the present invention only needs to mix each component in the solution according to the formula to obtain isoprene rubber grafted maleic anhydride, and endow isoprene rubber maleic anhydride with better grafting At the same time, the product has little peculiar smell, white color, environmental protection and safety, the preparation method is simple, the conditions are easy to control, the cost is low, the requirements for equipment are low, and it is suitable for industrial production.

[0060] The above-mentioned isoprene rubber is the isoprene rubber with a Mooney viscosity of 70-80 prepared by the rare earth catalyst independently developed by Jihua Research Institute as the graft base. Pentyl rubber grafted with maleic anhydride.

[0061] The above-mentioned initiator is preferably benzoyl peroxide (BPO), which comes from Tianjin Damao Chemical Reagent Factory. Benzoyl peroxide can decompose unde...

Embodiment 1

[0064] Add 5g of isoprene rubber and 100ml of toluene into a three-necked flask equipped with a thermometer, stirring paddle and thermometer, stir and heat to 70°C to fully dissolve the isoprene rubber in toluene, add 0.3g of maleic anhydride monomer, Stir at a medium speed, then add 0.2 g of initiator BPO, and continue stirring for 5 hours. After the reaction was finished, the product was precipitated with acetone, then suction-filtered with a Buchner funnel, and dried. The dried product was extracted in acetone for 3 hours with a Soxhlet extractor to remove unreacted monomers and initiators, and after purification, the product was vacuum-dried at 60°C to constant weight for later use to obtain the isoprene rubber graft branched maleic anhydride product.

Embodiment 2

[0066] Add 5g of isoprene rubber and 100ml of toluene into a three-necked flask equipped with a thermometer, stirring paddle and thermometer, stir and heat to 70°C to fully dissolve the isoprene rubber in toluene, add 0.5g of maleic anhydride monomer, Stir at a medium speed, then add 0.2 g of initiator BPO, and continue stirring for 5 hours. After the reaction was finished, the product was precipitated with acetone, then suction-filtered with a Buchner funnel, and dried. The dried product was extracted in acetone for 3 hours with a Soxhlet extractor to remove unreacted monomers and initiators, and after purification, the product was vacuum-dried at 60°C to constant weight for later use to obtain the isoprene rubber graft branched maleic anhydride product.

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Abstract

The invention belongs to the technical field of synthetic rubber, and relates to an isoprene rubber grafted maleic anhydride and a preparation method thereof. The isoprene rubber grafted maleic anhydride comprises, by mass, 84.7-91% of isoprene rubber, 3.4-3.6% of an initiator and 5.4-11.9% of maleic anhydride. The preparation method comprises the following steps: fully dissolving isoprene rubber in a solvent under normal pressure, adding a maleic anhydride monomer, adding benzoyl peroxide, and continuously stirring and reacting for a period of time; precipitating the above obtained product by using acetone after the reaction ends, carrying out suction filtration, and drying the obtained product; and extracting the dried product in acetone for 3h, purifying the extracted product, and carrying out vacuum drying to obtain the isoprene rubber grafted maleic anhydride. The isoprene rubber grafted maleic anhydride polymer is successfully prepared; the isoprene rubber grafted maleic anhydride has the advantages of light peculiar smell, white color, environmental protection and safety; and the preparation method has the advantages of simple process, easily controlled conditions, low cost, low device requirements, and suitableness for industrial production.

Description

technical field [0001] The invention belongs to the field of synthetic rubber, and relates to isoprene rubber grafted with maleic anhydride and a preparation method thereof. Background technique [0002] The full name of isoprene rubber (IR) is cis-1,4-polyisoprene rubber. Because its microscopic molecular structure is the same as that of natural rubber (NR), it is commonly known as synthetic natural rubber. my country has limited land resources for planting natural rubber, and it is unlikely that the annual output of dry rubber will be expanded on a large scale. Isoamyl rubber has similar chemical composition, three-dimensional structure and mechanical properties to natural rubber, and has good raw rubber strength, basic viscosity and aging properties. Its water resistance and electrical insulation exceed natural rubber. It is an ideal material to replace natural rubber in tires, etc. [0003] Although natural rubber itself has excellent properties, it is poor in oil resi...

Claims

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Application Information

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IPC IPC(8): C08F279/02C08F222/06C08F2/00
Inventor 杨雨富李菁张宏宇孙艳红彭建林
Owner PETROCHINA CO LTD
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