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Polypropylene material and preparation method thereof

A technology of polypropylene material and polypropylene resin, which is applied in the field of polypropylene material and its preparation, and can solve problems such as degradation of light aging resistance

Active Publication Date: 2012-12-19
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The addition of the stabilizer is only through physical blending, which is easy to migrate to the surface of the material; and the hindered amine stabilizer is easily soluble in organic solvents such as dimethyl carbonate, and it is also used as a light stabilizer for sealing materials for a long time. It will dissolve in solvent and precipitate out, resulting in a decrease in the light aging resistance of the material

Method used

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  • Polypropylene material and preparation method thereof
  • Polypropylene material and preparation method thereof
  • Polypropylene material and preparation method thereof

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preparation example Construction

[0036] The present invention also provides a preparation method for the above-mentioned polypropylene material, comprising the following steps: mixing 100 parts by weight of polypropylene resin, 30-80 parts by weight of toughening agent, 2-4 parts by weight of vinyl polyfunctional monomer, 1.5 ~2.5 parts by weight of the hindered amine compound with the structure of formula (I) and 0.15~0.25 parts by weight of antioxidant are uniformly mixed, added to a twin-screw extruder for blending and granulation, and the extrusion temperature is 180 ° C ~ 200 ° C, preferably 190°C~200°C, polypropylene material is obtained after irradiation.

[0037] According to the present invention, the masterbatch obtained by extrusion granulation is preferably dried to a moisture content of less than 1.5‰, and then irradiated. The radiation source for the irradiation is a radiation source well known to those skilled in the art, preferably a Co-60 source. The irradiation dose rate of the irradiation ...

Embodiment 2

[0069] Under the condition of nitrogen protection, mix and stir 0.2 mol of GW-944 obtained in 1.2, 0.4 mol of di-tert-butyl dicarbonate, 0.18 mol of potassium carbonate and 120 ml of dichloromethane. After 4 hours of reaction, add 0.3 mol of allyl bromide , Continue to react for 10h. Add dilute hydrochloric acid to adjust the pH value of the reaction solution to 5.0, remove the solvent under reduced pressure, extract with ether, anhydrous Na 2 SO 4 After drying and purification by n-hexane / ethyl acetate column chromatography, the hindered amine compound with the structure of formula (I) was obtained, and its average relative molecular mass was 2960.

[0070] The hindered amine compounds of the formula (I) structure obtained in Example 2 were analyzed by nuclear magnetic resonance to obtain their hydrogen spectrum and carbon spectrum. The results are as follows:

[0071] 1 HNMR (CDCl 3 ,ppm): 5.87(-C=CH), 5.19(-C=CH), 3.73(-CH 2 ), 3.49 (-CH 2 ),2.63(-CH),2.44(-CH),2.26(-...

Embodiment 3

[0074]Dry 1000g polypropylene, 300g POE, 30g TMPTA, 15g of hindered amine compound of formula (I) structure obtained in Example 2 and 1.5g of 3,5-di-tert-butyl-4-hydroxybenzyl phosphoric acid di Ethyl ester is mixed evenly, added to the twin-screw extruder for blending and granulation, the extrusion temperature is 180°C~200°C, the head temperature is 190°C, the extruded material is cooled by running water and pelletized to obtain the masterbatch; masterbatch After the material is dried to a moisture content of less than 1.5‰, it is irradiated with a Co-60 source in a vacuum at a dose rate of 1000 rad / min, and the total absorbed dose is 5 kGy to obtain a polypropylene material.

[0075] According to GB / T 2546, the tensile strength, flexural modulus, impact strength, Vicat softening temperature and gel content of the polypropylene material obtained in Example 3 were tested, and the test results obtained are shown in Table 1.

[0076] Utilize the accelerated aging of ultraviolet ...

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Abstract

The invention provides a polypropylene material and a preparation method for the polypropylene material. The polypropylene material is prepared in parts in weight: mixing 100 parts of polypropylene resin, 30-80 parts of flexibilizer, 2-4 parts of ethylene based multifunctional group monomer, 1.5-2.5 parts of hindered amine compound of a structure in a formula (I) and 0.15-0.25 parts of antioxygen, extruding, prilling and irradiating. Compared with a modified mode of mixing a light stabilizer and the polypropylene material in the prior art, the polypropylene material uses a modified mode that the hindered amine compound of the structure in the formula (I) serves as the light stabilizer to be mixed with the polypropylene material for irradiation. Firstly, the hindered amine compound contains end alkenyl groups with an unsaturated bond, and the hindered amine compound can be grafted on a macromolecule chain, so that the light stabilizer is not easy to move to a surface of the material; and secondly, modification is carried out by using irradiation, so that the material can form a three-dimensional space grid structure through crosslinking to limit movement of a molecular chain at the high temperature so as to improve heat-resistant property of the material.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a polypropylene material and a preparation method thereof. Background technique [0002] Polypropylene is a polymer compound obtained by polymerization of propylene. Compared with other general-purpose thermoplastics, it has the advantages of abundant raw materials, low price, low relative density, stress resistance, chemical corrosion resistance, and good wear resistance. Moreover, polypropylene material has good mechanical balance performance, easy processing, impact strength, flex resistance and electrical insulation. It is the product with the best heat resistance among general-purpose resins, and is widely used in daily necessities, textiles, and auto parts. And some conventional fields such as medical device manufacturing. Polypropylene is undoubtedly one of the most promising materials in plastics, no matter in terms of output and consumption, or in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L79/04C08L23/08C08L53/02C08L23/16C08L7/00C08L9/06C08L9/02C08L23/22C08K5/3492C08K5/12C08K5/103C08J3/28C08J3/24
Inventor 尹园郑春柏邓鹏飏柳美华魏巍
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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