Propylene multiphase copolymerization system, polymerization process and polypropylene kettle internal alloy

A technology of alloys in kettles and polypropylene, which is applied in the field of alloys in polypropylene kettles, can solve problems such as reducing the toughening effect, and achieve the effects of low cost, easy implementation, and obvious toughening effects
CN102838701AActive Publication Date: 2012-12-26INST OF CHEM CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF CHEM CHINESE ACAD OF SCI
Publication Date
2012-12-26

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Abstract

The invention discloses a propylene multiphase copolymerization system, a polymerization process and a product. Through the adoption of the propylene multiphase copolymerization system, fusion and aggregation of dispersion phases of ethylene-propylene random copolymers in a polypropylene / ethylene-propylene random copolymer reactor alloy are effectively suppressed. According to the invention, except for conventional components such as a propylene catalyst, a promoter, external electron donor and the like, the key component of the propylene multiphase copolymerization system is an aliphatic or aromatic symmetric diene monomer, so as to achieve stabilization of the dispersion phases of the ethylene-propylene random copolymers. The polymerization process is carried out by using a typical propylene two-section or multi-section polymerization process and is suitable for more industrially mature polymerization processes. Meanwhile, according to the invention, the polymerization product has spherical particles and has a multi-phase structure; and the dispersion phase of the polymerization product is an ethylene-propylene random copolymer provided with a branched or cross-linked structure and containing a double-alpha-olefin monomer unit.
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Description

technical field

[0001] The invention relates to a propylene heterogeneous copolymerization system, a polymerization method and an alloy in a polypropylene kettle. Background technique

[0002] Polypropylene is an indispensable synthetic material in our life, and it is also one of the most widely used and fastest growing resins. It has the advantages of low density, high melting point, easy processing, excellent impact resistance, and good insulation performance. In recent years Since then, it has become a synthetic resin with the fastest growth in output, the most varieties and grades, and the widest range of uses.

[0003] Propylene heterogeneous copolymerization refers to the use of the fourth and fifth generation of high-efficiency MgCl with good particle shape control ability 2 Carrier catalyst, ethylene-propylene random copolymerization is assisted after propylene homopolymerization, so that a polypropylene / ethylene-propylene copolymer reactor alloy with excellent impa...

Claims

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