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A kind of preparation method of high-efficiency and environment-friendly dual-monomer solid-phase grafted PP

A solid-phase grafting and environment-friendly technology is applied in the field of preparation of dual-monomer solid-phase grafted PP, which can solve the problems of many side reactants, long time, cumbersome preparation method of solid-phase grafted PP, etc., and achieves good appearance, Avoid black spots and yellow grains, the effect of low reaction cost

Active Publication Date: 2018-05-04
BEIJING HAIKE HUACHANG NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the preparation method of solid-phase grafted PP is cumbersome, time-consuming, and there are many side reactants.

Method used

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  • A kind of preparation method of high-efficiency and environment-friendly dual-monomer solid-phase grafted PP
  • A kind of preparation method of high-efficiency and environment-friendly dual-monomer solid-phase grafted PP
  • A kind of preparation method of high-efficiency and environment-friendly dual-monomer solid-phase grafted PP

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preparation example Construction

[0019] The invention provides a kind of high-efficiency and environment-friendly preparation method of dual-monomer solid-phase grafted PP comprising the following steps, combining figure 1 Shown:

[0020] Reaction mixture: prepare raw materials with the following proportions by weight: 100 parts of polypropylene powder, 1.0 to 2.0 parts of glycidyl methacrylate, 0.8 to 1.5 parts of maleic anhydride, 1.0 to 1.5 parts of benzoyl peroxide, and The above raw materials are introduced into the mixing tank 1 to obtain a uniformly mixed reaction mixture, wherein the mixing power and time can be manually set according to the actual situation;

[0021] Pre-grafting: Set the temperature in the mixing tank 1 to 50°C to 60°C, and heat for 0.5h to 1.0h; the monomer can be turned into a molten state, which can not only be coated on the outer surface of PP powder, but also act To infiltrate and swell PP, increase the reaction interface, and with the extension of swelling time, the monomer p...

Embodiment 1

[0025] Prepare the raw materials that parts by weight are the following ratios: the parts by weight of glycidyl methacrylate, maleic anhydride, and benzoyl peroxide are respectively 1.6 parts, 1.2 parts, and 1.2 parts, and the above-mentioned raw materials are imported in the mixing tank 1 Low mixing to obtain a uniformly mixed reaction mixture;

[0026] Pre-grafting: Set the temperature in the mixing tank 1 to 50°C and heat for 1.0h; the monomer can be turned into a molten state, which helps to increase the grafting rate;

[0027] Preparation of solid-phase grafted PP: import the pre-grafted reaction material into the screw extruder 2, remove the initial reaction product at the discharge port, and start grafting after 5 minutes when the appearance is stable; the temperature in the reaction zone is 130°C, and the temperature in the discharge zone 0°C, adjust the process parameters to 50r / min after starting up, and adjust the feeding according to the current;

[0028] Post-tre...

Embodiment 2

[0030] The difference with embodiment 1 is:

[0031] Prepare raw materials with the following ratios in parts by weight: the parts by weight of glycidyl methacrylate, maleic anhydride, and benzoyl peroxide are respectively 1.42 parts, 1.16 parts, and 1.42 parts;

[0032] Pre-grafting: set the temperature in mixing tank 1 to 55°C and heat for 0.8h;

[0033] Post-treatment of grafted products: wash the reaction product with water at 20° C. for 10 minutes in the serpentine water tank 3 .

[0034] Embodiment 1 and Embodiment 2 are preferred embodiments of the present invention. The grafted PP obtained in the above two embodiments is mixed evenly with PPT30S and glass fiber 635B respectively, and the ratio is 1:13:6, which is reinforced by 1#35 The twin-screw extruder was extruded and granulated when the process parameters were 240°C / 400rpm / 7Hz, and then injected into the national standard B1-type spline through a 68 injection molding machine. After standing at 25°C for 48 hours, ...

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Abstract

The invention discloses an efficient and environment-friendly preparation method of double-monomer solid-phase grafted PP (polypropylene). The preparation method comprises the following steps: a reaction mixture is prepared, wherein raw materials including 100 parts of PP powder, 1.0-2.0 parts of glycidyl methacrylate, 0.8-1.5 parts of maleic anhydride and 1.0-1.5 parts of benzoyl peroxide are led into a mixing tank; pre-grafting is performed, wherein the temperature in the mixing tank is set to be 50-60 DEG C, and heating is performed for 0.5h-1.0h; solid-phase grafted PP is prepared, wherein reaction materials for pre-grafting are led into a screw extruder for a reaction; grafting after-treatment is performed, wherein a reaction product is flushed with water at a temperature of 10-30 DEG C in an S-shaped water tank, led into a vibration screen and bagged after vibrated and dried by the vibration screen. According to the method, mixing of the reaction products, pre-grafting, reaction pre-grafting and grafting after-treatment are integrated, the reaction is continuous, and the operation is convenient and simple; the production efficiency and the grafting rate of a product are improved, the production cost is enabled to be lower, and unreacted free monomers in the grafted PP product are removed.

Description

technical field [0001] The invention relates to the preparation of a plastic compatibilizer and the modification of plastics, in particular to a high-efficiency and environment-friendly preparation method of double-monomer solid-phase grafted PP. Background technique [0002] PP (polypropylene) is a general-purpose polymer material with excellent performance and low price, but because polypropylene is a non-polar polymer, its dyeability, hydrophilicity, and adhesion are poor, and it is different from other The material compatibility is also poor, and these shortcomings limit the application of polypropylene. Compatibilizer technology is the core of plastic alloy development and research, that is, the use of functional monomers such as acrylic acid and its esters, maleic anhydride, maleic imide and other small molecule olefin compounds grafted onto polypropylene to obtain polar polypropylene , and then adding this polar material to the polypropylene substrate increases the o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F255/02C08F220/32C08F222/06
CPCC08F255/02C08F220/325C08F222/06
Inventor 丁敏李文东王占岳杨永生
Owner BEIJING HAIKE HUACHANG NEW MATERIAL TECH
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