Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Preparation method and equipment of high-performance impact polypropylene

A polypropylene and propylene technology, applied in the field of polypropylene preparation, can solve the problems of not realizing the influence of the catalyst performance of the addition method and the like

Active Publication Date: 2013-10-23
CHINA PETROLEUM & CHEM CORP +1
View PDF16 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventor did not elaborate on the addition of external electron donors. Obviously, he did not realize the impact of different addition methods on the performance of the catalyst in the copolymerization stage.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method and equipment of high-performance impact polypropylene
  • Preparation method and equipment of high-performance impact polypropylene
  • Preparation method and equipment of high-performance impact polypropylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The polymerization reaction is carried out on a set of 40kg / hr horizontal gas phase polypropylene pilot plant.

[0048] step i

[0049] Pre-polymerization: The main catalyst (DQ-III catalyst, provided by Sinopec Beijing Aoda Catalyst Branch), the co-catalyst (triethylaluminum), and the first external electron donor (tetraethoxysilane) are continuously added into the continuous stirring tank type The prepolymerization reactor carries out the prepolymerization reaction. The add-on of triethylaluminum is proportional to the add-on of catalyzer, (magnesium mol ratio in the aluminum / catalyst in triethylaluminum is 4.0); The ratio of the added amount is: the molar ratio of aluminum in triethylaluminum / silicon in tetraethoxysilane is 40. The pre-polymerization is carried out in the environment of propylene liquid phase body, the temperature is 15°C, the residence time is about 4min, and the reaction pressure is 2.4MPa.

[0050] After the prepolymerization, the catalyst is c...

Embodiment 2

[0058] Same as Example 1, the difference is: the addition position of the second external electron donor is on the polymer delivery pipeline before the airlock tank. The specific process conditions are shown in Table 1. The performance test data of the obtained pellets are shown in Table 2.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
melt flow indexaaaaaaaaaa
melt flow indexaaaaaaaaaa
melt flow indexaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method and equipment for preparing impact polypropylene. The method comprises the following steps of carrying out polymerization reaction in the presence of a Ziegler-Natta catalyst, and carrying out gas-phase polymerization on propylene or propylene and alpha-olefin in the presence of a catalyst containing first external electron donors to obtain a polymer A; adding a second external electron donor to be premixed with the polymer A; and carrying out gas-phase polymerization on propylene or propylene and alpha-olefin in the presence of a material after premixing to obtain a polymer B. By adopting the method provided by the invention, a polypropylene product comprising a continuous phase and a rubber phase is finally obtained by adopting the two kinds of external electron donors with different hydrogen modulation sensitivity and controlling the addition mode of the second external electron donor with weak hydrogen modulation sensitivity; and the product has higher melt index and higher impact strength and has better impact resistance while keeping higher melt fluidity.

Description

technical field [0001] The invention relates to the field of polypropylene preparation, in particular to a method and equipment for preparing high-performance impact-resistant polypropylene by gas phase polymerization. Background technique [0002] Impact polypropylene has excellent rigidity and impact strength, high tensile strength and flexural modulus, and has been widely used in many fields, such as molded or extruded automotive parts, home appliance parts, containers and household items. In these applications, high melt fluidity impact polypropylene has unique advantages. It can be used for one-time injection molding of large, thin-walled and complex products, and at the same time can greatly reduce the energy consumption of the processing process. research focus. Herein, the high melt fluidity impact polypropylene refers to an impact propylene copolymer with a melt flow rate > 20 g / 10 min. [0003] It is generally considered that impact propylene copolymers consis...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/06C08F210/06C08F2/34C08F4/646C08F2/01C08L23/12C08L23/14C08L23/16
Inventor 宋文波周汉学毕福勇刘国强胡慧杰魏文骏张晓萌
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com