A kind of polypropylene composition and preparation method thereof
A polypropylene composition and polymer technology, applied in the field of polypropylene composition, can solve the problem that the scratch resistance and stress whitening resistance of polypropylene products cannot be simultaneously improved, and achieve good stress whitening resistance, The effect of simple preparation process and easy operation
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preparation example Construction
[0045] 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.
[0046] 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
[0094] Preparation Example: Preparation of Polymer Composition
[0095]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.
[0096] 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:
[0097] The main catalyst (titanium-containing active solid catalyst component) is obtained by the method described in Example 1 of CN1258683A, wherein the internal electron donor compound is diisobutyl phthalate.
[0098] 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 out the polymerizati...
preparation example 2
[0107] The polymerization reaction was carried out according to the method of Reference Preparation Example 1, except that the external electron donor used was diisobutyldimethoxysilane, and the second reactor was not used. 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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