Polypropylene composition and preparation method thereof

A technology of polypropylene composition and polymer, which is applied in the field of polypropylene composition, can solve the problems that the scratch resistance and stress whitening resistance of polypropylene products cannot be improved at the same time, and achieve good stress whitening resistance, The effect of simple preparation process and easy operation

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a propylene composition and a preparation method thereof in order to overcome the problem that the exi

Method used

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  • Polypropylene composition and preparation method thereof
  • Polypropylene composition and preparation method thereof
  • Polypropylene composition and preparation method thereof

Examples

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preparation example Construction

[0048] The fully vulcanized powder rubber filled with polysiloxane lubricants can be purchased commercially, and can also be prepared according to conventional methods. For example, the preparation method can include: using fully vulcanized powder rubber as the base material, at 30-80 ° C, Under the condition of high-speed stirring, a certain amount of polysiloxane lubricant is filled. In the fully vulcanized powder rubber filled with polysiloxane lubricants, relative to 100 parts by weight of fully vulcanized powder rubber, the filling amount of polysiloxane lubricants can be 1-200 parts by weight, preferably It is 10-150 parts by weight.

[0049] The fully vulcanized powder rubber filled with hydrocarbon lubricant and polysiloxane lubricant can be commercially obtained, and can also be prepared according to conventional methods, and its preparation method can include, for example: Rubber is used as the base material, filled with a certain amount of polysiloxane lubricant. ...

preparation example

[0109] Preparation Example: Preparation of Polymer Composition

[0110] The polymer compositions in the following preparation examples and reference preparation examples were obtained according to the following methods, wherein the amount of materials used and the polymerization reaction conditions are listed in Table 1.

[0111] The polymerization reaction is carried out on a set of horizontal gas-phase polypropylene pilot plant. The polymerization reactor is two horizontal stirring reactors connected in series. The polymerization method and steps are as follows:

[0112] The main catalyst (titanium-containing active solid catalyst component) is obtained by the method described in Example 1 of Chinese Patent CN102453150A, wherein the internal electron donor compound is diisobutyl phthalate.

[0113] The main catalyst, co-catalyst (triethylaluminum) and external electron donor are continuously added to the horizontal stirring reactor under the carrying of propylene to carry ou...

preparation example 2

[0122] Using the catalyst used in Reference Preparation 1, the polymer composition was prepared according to the above method, except that the polymerization temperature in the first reactor was 85°C, the amount of hydrogen added was changed, and the composition and content of component (b) were changed. The reaction conditions and product properties are shown in Table 1. The product was granulated with additives to make an injection molding sample DP2 of the polymer composition, and its test properties are shown in Table 2.

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Abstract

The invention relates to a polypropylene composition and a preparation method thereof. The polypropylene composition comprises polypropylene resin and a polymer composition, wherein the polymer composition comprises 40-70wt% of crystalline polypropylene A and 30-60wt% of an ethylene-propylene elastic copolymer B; both the molecular weight distribution index of the polypropylene composition and the molecular weight distribution index of the crystalline polypropylene A are greater than 4; the ratio of a melt index of the polypropylene composition to a melt index of the crystalline polypropylene A is 0.7-1.3. Products prepared by the polypropylene composition are high in scratch-resistant performance and stress-whitening-resistant performance.

Description

technical field [0001] The present invention relates to a polypropylene composition, a method for preparing the polypropylene composition, and a polypropylene composition prepared by the method. Background technique [0002] Polypropylene has the advantages of light weight, low price, easy recycling, good processability, etc., and is widely used in many fields. However, polypropylene also has the problem of poor impact resistance, which cannot meet the requirements of actual use when it is applied to occasions that require a balance of rigidity and toughness, especially in the fields of automobiles and home appliances. At present, in order to improve the impact resistance of polypropylene, the common method is to blend rubber or elastomers, such as ethylene-propylene rubber, polyolefin elastomers, etc. However, this method also has certain limitations, one of which is the adverse effect on the surface properties of modified polypropylene (such as scratch stress whitening, e...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/14C08L15/00C08L23/06C08L23/08C08F210/06C08F4/649C08F4/654C08F2/34
CPCC08F210/06C08L23/12C08L2205/025C08L2205/035C08L2207/062C08L2207/066C08L2207/14C08L23/14C08L23/16C08L9/06C08L23/06C08F4/6494
Inventor 康鹏金滟杨芝超蔡涛丁树岩杜亚锋石胜鹏刘善元张静
Owner CHINA PETROLEUM & CHEM CORP
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