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Faint-odor polypropylene stem grafting maleic anhydride extruded by double screws and preparation method thereof

A technology of grafting maleic anhydride and twin-screw extrusion is applied in the field of twin-screw extrusion of low-odor polypropylene grafted maleic anhydride and its preparation, and can solve the irritating odor of PP grafted maleic anhydride, which is unfavorable to workers. Physical health, the effect is not very ideal, etc., to achieve the effect of a good working environment, less addition, and less taste

Inactive Publication Date: 2012-10-31
SHENZHEN KEJU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] PP grafted maleic anhydride is a compatibilizer developed to improve the compatibility of PP plastics with other fillers. The current industrialized PP grafted maleic anhydride mainly uses dicumyl peroxide as the initiator. The main problem of using the only monomer maleic anhydride is that PP grafted maleic anhydride produces a very pungent smell during production, and the working environment is poor, which is not conducive to the health of workers
Moreover, the grafting rate of PP grafted maleic anhydride monomer is low, which is not ideal for improving the compatibility of PP plastics with other fillers.

Method used

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  • Faint-odor polypropylene stem grafting maleic anhydride extruded by double screws and preparation method thereof
  • Faint-odor polypropylene stem grafting maleic anhydride extruded by double screws and preparation method thereof
  • Faint-odor polypropylene stem grafting maleic anhydride extruded by double screws and preparation method thereof

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preparation example Construction

[0024] The preparation method of above-mentioned PP graft maleic anhydride of the present invention may further comprise the steps:

[0025] S1. According to PP 93-98%, maleic anhydride 0.5-2%, styrene 0.5-2%, odorless DCP 0.1-1%, antioxidant 0.1-2%, weigh maleic anhydride, odorless DCP, antioxidant , PP and styrene, and add maleic anhydride, odorless DCP, and antioxidant to the weighed styrene and stir for a predetermined time, which can be set as required; and the weighed PP Dry at 80-85°C for 2-3 hours;

[0026] S2. Add the dried PP and the styrene mixture evenly stirred in step S1 into the high-speed batching mixer, and stir for a predetermined time, which can be set as required;

[0027] S3. Place the mixture stirred in step S2 in a twin-screw machine for melt extrusion and granulation.

[0028] Wherein, the process conditions in step S3 can be: twin-screw first-stage temperature 140-150°C, second-stage temperature 150-160°C, third-stage temperature 155-165°C, main scre...

Embodiment 1

[0032] Dissolve maleic anhydride 2%, odorless DCP 1%, and antioxidant 2% into 2% styrene liquid, pre-mix in a high-speed batch mixer for 3 minutes, then add baked 93% PP into the high-speed batch mixer , and then stirred together for 5 minutes. Put the stirred mixture in a twin-screw machine to melt, extrude and granulate. The process conditions are as follows: twin-screw first stage temperature 140~150°C, second stage temperature 150~160°C, third stage temperature 155~165°C, main screw speed 80-100 rev / min, feeding screw speed 30-45 rev / min.

Embodiment 2

[0034] Dissolve 1.5% maleic anhydride, 1.0% odorless DCP, and 1.5% antioxidant into 1.5% styrene liquid, pre-mix in a high-speed batch mixer for 3 minutes, then add the baked 94.5% PP into the high-speed batch mixer , and then stirred together for 5 minutes. Put the stirred mixture in a twin-screw machine to melt, extrude and granulate. The process conditions are as follows: twin-screw first stage temperature 140~150°C, second stage temperature 150~160°C, third stage temperature 155~165°C, main screw speed 80-100 rev / min, feeding screw speed 30-45 rev / min.

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Abstract

The invention discloses a faint-odor polypropylene (PP) stem grafting maleic anhydride extruded by double screws and a preparation method of the faint-odor polypropylene stem grafting maleic anhydride extruded by double screws. The faint-odor polypropylene stem grafting maleic anhydride extruded by the double screws consists of the following components by weight percent: 93-98% of PP, 0.5-2% of maleic anhydride, 0.5-2% of styrene, 0.1-1% of initiating agent, namely bis-(tert-butyl peroxide isopropyl) benzene (tasteless dicumyl peroxide (DCP)) and 0.1-2% of antioxidant, wherein the appearance of the 96% of tasteless DCP is light-yellow tabular crystal, the melting point of the tasteless DCP is 46 DEG C-52 DEG C, and 9.08% of active oxygen is contained in the tasteless DCP. According to the faint-odor PP stem grafting maleic anhydride extruded by the double screws, as the tasteless DCP is taken as the initiating agent to replace conventional dicumyl peroxide (DCP), and is high in efficiency, the additive amount is small, the decomposed taste is faint, and the operation environment is good; and meanwhile, due to the introduction of second monomer styrene, the stem grafting efficiency of the PP stem grafting maleic anhydride is improved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a twin-screw extruded low-odor polypropylene grafted maleic anhydride and a preparation method thereof. Background technique [0002] PP plastic (Polypropylene, polypropylene) is one of the five general-purpose plastics and has a wide range of applications. However, PP plastic has many disadvantages such as poor strength, flammability, and poor low-temperature toughness, which limit its further application. Modification of PP plastics (including glass fiber reinforcement, flame retardancy, mineral filling, etc.) is the main way to expand its application fields. PP plastic itself is a non-polar polymer, and the fillers used for modification, such as glass fiber, flame retardants, minerals, etc., have high polarity. According to the principle of similar compatibility, when PP plastics are physically blended with these fillers , it is necessary to add a compatibilizer to ...

Claims

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Application Information

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IPC IPC(8): C08L51/06C08F255/02C08F222/08C08F212/08C08K5/134C08K5/526B29C47/92B29C48/40B29C48/92
CPCC08L51/06C08F222/08C08F255/02B29C48/875B29C48/92B29C2948/92704B29C48/40B29C2948/9259B29C2948/92885B29C2948/92895C08F222/06C08F212/08
Inventor 徐东徐永马旭辉
Owner SHENZHEN KEJU NEW MATERIAL
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