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Synthesizing method of high-ethylene-content polypropylene injection molding tank special-purposed resin

A synthesis method and polypropylene technology are applied in the field of synthesizing special resins for high ethylene content impact polypropylene injection barrels, which can solve the problems of low market supply of products and the like

Active Publication Date: 2012-12-19
PETROCHINA CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0002] In recent years, the domestic demand for high-end injection molding packaging materials (MFR: 3.0-5.0g / 10min) has gradually increased, but domestic petrochemical companies have little supply of such products in the market, and domestic petrochemical impact-resistant PP products are mainly produced with EPS30R or K8003 (K8303) mainly, so it belongs to the market development gap in this application field

Method used

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  • Synthesizing method of high-ethylene-content polypropylene injection molding tank special-purposed resin
  • Synthesizing method of high-ethylene-content polypropylene injection molding tank special-purposed resin
  • Synthesizing method of high-ethylene-content polypropylene injection molding tank special-purposed resin

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Embodiment 1

[0036] Device load 7.5t / h: main catalyst (180g / h), electron donor (850g / h) and triethylaluminum (1340g / h) in the pre-contact tank D201 at about 10°C, fully stirred and mixed to form complexation center. The catalyst mixture overflowed from D201 is mixed with cold propylene (20°C, flow rate 5.5-6.5t / h) in Z203 (inline mixer) and then enters prepolymerization reactor R200 at 20°C and 3.4Mpa pressure , reacted for about 4 minutes, and the slurry entered the loop reactor R201. The polymerization operation temperature is 70°C and the pressure is 3.4Mpa. The pre-polymerized slurry, propylene and H to control the molecular weight 2 (1.3kg / h) are input into the loop reactor R201 together, a part of propylene is polymerized, and the remaining liquid propylene is used as the flow carrier of solid PP. The circulation pump makes each component flow at a high speed at a speed of 7-8m / s and fully mixes them uniformly. The slurry concentration is controlled at 50-55%wt. The density of the ...

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Abstract

The invention relates to a synthesizing method of high-ethylene-content polypropylene injection molding tank special-purposed resin. The resin is synthesized by using a Spheripol loop polypropylene apparatus. According to the invention, a CS-II catalyst is adopted; propylene and hydrogen are added into a loop reactor; and propylene homo-polymerization is carried out with a liquid bulk polymerization manner; an obtained homo-polymer, ethylene, propylene and hydrogen are added into a gas-phase reactor, and are subjected to gas-phase copolymerization; ethylene partial pressure ratio is regulated to 40-45%, and copolymer powder with an ethylene content of 11-13% and a relatively high ethylene-propylene rubber-phase content is obtained; the powder is mixed with an antioxidant and a neutralizing agent according to a formulation ratio; a nucleating agent is adopted in auxiliary for improving a product quality; and extrusion granulation and homogenization are carried out, such that the special-purposed material is obtained. A melt flow rate of the special-purposed particle material is 3-5g / 10min.

Description

technical field [0001] The invention relates to a method for synthesizing a high-ethylene content (11%-13%, mass content) special resin for impact-resistant polypropylene injection molding barrels. Background technique [0002] In recent years, the domestic demand for high-end injection molding packaging materials (MFR: 3.0-5.0g / 10min) has gradually increased, but domestic petrochemical companies have little supply of such products in the market, and domestic petrochemical impact-resistant PP products are mainly produced with EPS30R or K8003 (K8303) mainly, so it belongs to the market development gap in this application field. According to market information feedback, the current annual demand for this type of resin is about 150,000 tons in East China, and there is a certain demand in South China and North China, with a total annual consumption of about 200,000 tons. At present, the materials used by domestic enterprises are mainly special materials such as PP7032E, a speci...

Claims

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Application Information

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IPC IPC(8): C08L53/00C08K5/101C08K5/526C08K5/098C08F2/01
Inventor 韩明哲徐文清华伦松李志峰李敏周豪
Owner PETROCHINA CO LTD
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