PP Random Copolymer R701 (Injection) - South Korea


:   Poly(1-methylethylene)

Cas Number

:   9003-07-0

HS Code

:   390210




Basic Info

Appearance Name

:   White crystal

Common Names

:   Propene Polymers, Propylene Polymers


: 25 Kg Bag

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Technical Document

Brief Overview

Propylene and another comonomer—typically butene or ethylene—are copolymerized to create polypropylene random copolymer, a form of polymer in which the comonomer is dispersed randomly throughout the polymer chain. Because the comonomer is included, polypropylene random copolymers have a lower melting point, more transparency, and superior flexibility than homopolymer polypropylene. The polymer's toughness, impact resistance, and processability are all enhanced by the addition of the comonomer. Because of their exceptional qualities and adaptability, polypropylene random copolymers are widely employed in many different industries, including consumer items, medical equipment, automotive components, and packaging. Because of their great strength, low weight, and ability to withstand chemicals and ultraviolet radiation, they are frequently employed in place of more conventional materials like glass and metal.

Manufacturing Process

Propylene is reacted with a comonomer, such as ethylene or butene, using a catalyst system in the copolymerization process to create polypropylene random copolymer (PPRC). The following steps are usually involved in the process:

  1. Polymerization: To create a high molecular weight homopolymer polypropylene, propylene is polymerized in the presence of a Ziegler-Natta catalyst, which is usually a mixture of a transition metal compound and an organoaluminum co-catalyst, under particular pressure and temperature conditions.

  2. Comonomer addition: The comonomer, such as butene or ethylene, is added to the reaction mixture together with the catalyst system after the necessary molecular weight of the homopolymer is reached. Random copolymer chains are created when the comonomer and polypropylene chain interact.

  3. Termination: A terminating agent can be added, or the temperature and pressure can be lowered, to stop the polymerization process.

  4. Separation and finishing: A variety of techniques, including filtering, washing, and drying, are used to separate the final random copolymer from the catalyst and other byproducts. After that, the completed product is pelletized and ready for use.


The unique features of polypropylene random copolymer (PPRC), which combine the qualities of polypropylene and the comonomer, provide it a wide variety of uses. Several typical uses for PPRC are as follows:

  1. Packaging: Because of its strong barrier qualities against gases, moisture, and other impurities, PPRC is frequently used in packaging applications such as food containers, bottles, and films.

  2. Automobile components: Because of its great impact resistance, hardness, and resilience to heat and chemicals, PPRC is utilized in the car industry for a variety of parts, including dashboards, bumpers, and interior trim.

  3. Consumer products: Because of its strength, flexibility, and durability, PPRC is used in a wide range of consumer goods, including toys, home appliances, and sports equipment.

  4. Medical devices: Because of its superior biocompatibility and sterilizing capabilities, PPRC is utilized in medical equipment such syringes, IV bags, and medical packaging.

  5. Pipes and fittings: Because PPRC has a great resistance to heat, pressure, and chemicals, it is utilized in the construction sector for pipes and fittings.

  6. Textiles: Because of its exceptional tensile strength and abrasion resistance, PPRC fibers are utilized in a variety of textile applications, including upholstery, carpets, and geotextiles.

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