Impact copolymer homopolymer

Properties Polybutylene extrusion Homopolymer Copolymer Impact copolymer Polyallomer Injection molding ... 

A single reactor system is used to make olefin homopolymers and random copolymers. Two reactors are operated in series for the production of block copolymers (impact copolymers). An inert conveying gas (nitrogen) is used to maintain the fluidised bed in the reactor for impact copolymerisation [43,51]. 

Application Spheripol process technology produces propylene-based polymers including homopolymer PP and many families of random and heterophasic impact and specialty impact copolymers. 

Products The process can produce a broad range of propylene-based polymers, including homopolymer PP, various families of random copolymers and terpolymers, heterophasic impact and speciality impact copolymers (up to 25% bonded ethylene), as well as high-stiffness, high-clarity copolymers. 

Application To produce polypropylene (PP) homopolymer, random copolymer and impact copolymer using the BP Innovene gas-phase process with proprietary 4th generation supported catalyst. 

For impact copolymer production, a second reactor (4) in series is required. A reliable and effective gas-lock system (3) transfers powder from the first (homopolymer) reactor to the second (copolymer) reactor, and prevents cross contamination of reactants between reactors. This is critically important when producing the highest quality impact copolymer. In most respects, the operation of the second reactor system is similar to that of the first, except that ethylene in addition to propylene is fed to the second reactor. Powder from the reactor is transferred and depressurized in a gas/powder separation system (5) and into a purge column (6) for catalyst deactivation. The deactivated powder is then pelletized (7) with additives into the final products. 

Products A wide range of polypropylene products (homopolymer, random copolymer and impact copolymer) can be produced to serve many applications, including injection molding, blow molding, thermoforming, film, extrusion, sheet and fiber. Impact copolymer produced using this process exhibits a superior balance of stiffness and impact resistance over a broad temperature range. 

In the process, homopolymer and random copolymer polymerization occurs in the loop-type reactor (or vessel-type reactor) (1). For impact copolymer production, copolymerization is performed in a gas-phase reactor (2) after homopolymerization. The polymer is discharged from a gas-phase reactor and transferred to the separator (3). Unreacted gas accompanying the polymer is removed by the separator and recycled to the reactor system. The polymer powder is then transferred to the dryer system (4) where remaining propylene is removed and recovered. The dry powder is pelletized by the pelletizing system (5) along with required stabilizers. 

Application Tb produce polypropylene including homopolymer, random copolymer and impact copolymer. 

Products Homopolymers can be produced with melt flows from less than 0.1 to 3,000 and isotactic content up to 99%. Random copolymers can be produced with up to 12 wt% ethylene or up to 21 wt% butene over a wide melt flow range (<0.1 to >100). A full range of impact copolymers can be polymerized with a good stiffness to impact balance. Products from narrow to broad molecular-weight distribution can be manufactured in grades suitable for film injection, molding, blow molding, extrusion and textile applications. 

Targor GmbH Polypropylene Propylene Novelen process uses 1 or 2 gas-phase reactors connected in series to produce PP homopolymer, copolymer and impact copolymer NA NA... 

As an option, the polymer can then be fed to a fluidized bed gas-phase reactor, operated in series vith the MZCR, where additional copolymerization can take place to yield high-impact copolymer PP. This gas-phase reactor may be bypassed when homopolymer or random copolymers are produced. In this reactor, the elastomeric phase (ethylene/propylene rubber) is generated within the porous homopolymer matrix that resulted from the first reaction stage. The pores, developed inside the polymer particle in the MZCR upstream, allow the rubber phase to develop without the formation of agglomerates resulting from the sticky nature of the rubber. 

The design can be made for homopolymer, random copolymer or heterophasic impact copolymer. The modular structure of the process is such that a Spherizone process plant can be upscaled in successive stages, starting with a basic setup for monomodal operations and later adding the barrier recovery section and a fluid bed gas-phase reactor for the production of bimodal and impact copolymer, respectively. 

Applications To produce the full range of polypropylene (PP), including homopolymer, random copolymer and impact copolymer PP, using the ExxonMobil PP Process. 

Products The process can produce a wide variety of homopolymers, random copolymers including terpolymers and pentene copolymers, and impact copolymers with up to 50% rubber content. Product range also includes metallocene PP based on a simple drop-in technology. 

ExxonMobil Chemical Technology Licensing LLC Polypropylene Propylene Technology provides large-capacity reactors for homopolymer PP and impact copolymers NA NA... 

Lummus Novolen Technology Polypropylene homopolymer, random copolymers, impact copolymers, including Metallocene PP Propylene (and ethylene for production of copolymers) Polymerization of propylene in one or two gas-phase reactors stirred by helical agitators to produce a wide range of products 27 2010... 

The Dow Chemica Co/ Univation Technologies Polypropylene Propylene comonomers Process produces homopolymer, random copolymer and impact copolymer polypropylene using the Dow gas-phase UNIPOL PP process 52 2010... 

During polymerization, this porous structure is used to produce heterophasic or impact copolymers by dispersing an elastomeric ethylene-propylene polymer in the initially generated homopolymer granule... 

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