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Preparation method for polypropylene grafted maleic anhydride with high graft ratio and low odor

A polypropylene grafting and maleic anhydride technology is applied in the field of preparing polypropylene grafting maleic anhydride, which can solve the problems of low reactivity and achieve the effects of improving compatibilization, increasing quantity and light odor.

Inactive Publication Date: 2015-12-09
ZHEJIANG JAVA SPECIALTY CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the system of melt-grafting PP with maleic anhydride, due to the symmetrical structure of maleic anhydride, the reactivity is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Add 500 grams of PP and 500 grams of C5 petroleum resin into the reaction kettle, evacuate, heat up to 190-230 degrees, and remove impurities in vacuum for 1-2 hours;

[0046] (2) Stop vacuuming, feed nitrogen, add 20 grams of maleic anhydride, stir until PP and maleic anhydride are mixed;

[0047] (3) After the temperature is stabilized at 170-190 degrees, start to add 4 grams of 2,5-dimethyl-2,5-di-tert-butylperoxyhexane and 20 grams of styrene mixture dropwise, and the time is controlled for 10-100 degrees. 30min;

[0048] (4) After the dropwise addition is completed, continue the nitrogen reaction for 30-60 minutes;

[0049] (5) After the reaction is completed, keep the reaction temperature, and slowly vacuumize to remove unreacted impurities, and the time is controlled within 1 to 2 hours;

[0050] (6) After the impurity removal is completed, the material is pressed into a single-screw extruder with nitrogen gas for extruding and pelletizing to obtain the pro...

Embodiment 2

[0052] (1) Add 750 grams of PP and 250 grams of C9 petroleum resin into the reaction kettle, evacuate, heat up to 190-230 degrees, and vacuum remove impurities for 1-2 hours;

[0053](2) stop vacuuming, pass into nitrogen, add 15 grams of maleic anhydride, stir until PP and maleic anhydride are mixed;

[0054] (3) After the temperature is stabilized at 170-190 degrees, start to add 4 grams of 2,5-dimethyl-2,5-di-tert-butylperoxyhexane and 20 grams of styrene mixture dropwise, and the time is controlled for 10-100 degrees. 30min;

[0055] (4) After the dropwise addition is completed, continue the nitrogen reaction for 30-60 minutes;

[0056] (5) After the reaction is completed, keep the reaction temperature, and slowly vacuumize to remove unreacted impurities, and the time is controlled within 1 to 2 hours;

[0057] (6) After the impurity removal is completed, the material is pressed into a single-screw extruder with nitrogen gas for extruding and pelletizing to obtain the pr...

Embodiment 3

[0059] (1) Add 900 grams of PP and 100 grams of C5 petroleum resin into the reaction kettle, evacuate, heat up to 190-230 degrees, and remove impurities in vacuum for 1-2 hours;

[0060] (2) stop vacuuming, pass into nitrogen, add 15 grams of maleic anhydride, stir until PP and maleic anhydride are mixed;

[0061] (3) After the temperature is stabilized at 170 to 190 degrees, start to add 4 grams of 2,5-dimethyl-2,5-di-tert-butylperoxyhexane and 25 grams of styrene mixture dropwise, and the time is controlled for 10 to 10 degrees. 30min;

[0062] (4) After the dropwise addition is completed, continue the nitrogen reaction for 30-60 minutes;

[0063] (5) After the reaction is completed, keep the reaction temperature, and slowly vacuumize to remove unreacted impurities, and the time is controlled within 1 to 2 hours;

[0064] (6) After the impurity removal is completed, the material is pressed into a single-screw extruder with nitrogen gas for extruding and pelletizing to obta...

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PUM

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Abstract

The invention discloses a preparation method for polypropylene grafted maleic anhydride with a high graft ratio and low odor. The method comprises the following steps: adding double-bond-containing petroleum resin with a concentration of 1% to 50% into a system, then adding an auxiliary monomer styrene and modifying a composite material of polypropylene and the petroleum resin with maleic anhydride under the action of an initiator with temperature controlled to be 170 to 230 DEG C; and removing unreacted impurities in the system through vacuumization. A compatibilizing agent with a high graft ratio and low odor can be prepared by utilizing the method in the invention. The prepared polypropylene grafted maleic anhydride compatibilizing agent can improve bonding strength between polypropylene and inorganic fillers like calcium carbonate, glass fiber and mica, thereby enhancing tensile strength, thermal deformation temperature and the like of polypropylene.

Description

Technical field: [0001] The invention relates to the technical field of polymer material processing, in particular to a method for preparing polypropylene grafted maleic anhydride with high grafting rate and low odor. Background technique: [0002] As a general-purpose plastic, polypropylene is famous for its large output, wide range of applications, and high quality and low price. However, polypropylene is non-polar and crystalline, which makes it poorly compatible with polar polymers, inorganic fillers, and reinforcing materials. When blending and compounding, it is necessary to add a compatibilizer to reduce the interfacial tension. Grafting polypropylene, introducing appropriate polar branched chains on the molecular chain, utilizing the polarity and reactivity of the branched chains, improving its performance deficiencies and adding new properties at the same time. Therefore, graft modification is a simple and effective method to expand the application of polypropylene...

Claims

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Application Information

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IPC IPC(8): C08F291/00C08F289/00C08F255/02C08F222/06C08F212/08
Inventor 徐力群宋玉奎彭文平
Owner ZHEJIANG JAVA SPECIALTY CHEM CO LTD
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