Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method for high isotactic polybutene-1

A high-tactic polybutene and pre-polymerization technology, applied in the field of olefin polymerization, can solve the problem of unspecified particle shape characteristics of products in the polymerization process, and achieve the effects of low cost, high efficiency and simple process

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
View PDF16 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Patent CN200710013587.X provides a bulk polymerization method of high isotactic polybutene-1, adopts Ziegler-Natta catalytic system, carries out bulk polymerization at 50°C, the isotacticity of the polymer is greater than 98%, and powdery polybutene can be directly obtained Butene-1, but there is no description of the more detailed polymerization process and product particle shape characteristics

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 for high isotactic polybutene-1

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The main catalyst (titanium-containing solid catalyst active component) is obtained by the method described in Example 1 of Chinese Patent CN93102795, its Ti content: 2.2wt%, diisobutyl phthalate content: 11.2wt%.

[0040] Add 50ml of hexane into a 500ml pressure-resistant glass reactor, lower the temperature of the system to 0°C, and then add the main catalyst, cocatalyst (triethylaluminum) and part of the external electron donor that have been pre-complexed at room temperature for 2 minutes (tetraethoxysilane), then add 0.5 bar of hydrogen, and then add 20ml of butene to start the pre-polymerization reaction. After 4 minutes, more fine sand-like polymers appear, and filter out the system with a filter head with a filter pore size of 5um. Most of the hexane, 300ml of butene was added to the system, the temperature was raised to 30°C to enter the bulk polymerization stage, and the polymerization was continued for 2 hours.

[0041] After the reaction is finished, the sys...

Embodiment 2

[0043] The cocatalyst, aluminum alkyl, precomplexation and polymerization process conditions used in embodiment 2 are the same as in embodiment 1. The difference from Example 1 is that the main catalyst used in Example 2 is the catalyst described in Example 8 of Chinese Patent CN200410073623.8. The specific process conditions are shown in Table 1.

Embodiment 3

[0045] The cocatalyst, aluminum alkyl, precomplexation and polymerization process conditions used in embodiment 3 are the same as in embodiment 1. The difference from Example 1 is that the main catalyst used in Example 3 is the catalyst described in Example 1 of Chinese Patent No. 200910163055.X. The specific process and product performance characterization are shown in Table 1.

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

No PUM Login to View More

Abstract

The invention discloses a preparation method for high isotactic polybutene-1. According to the invention, low-temperature slurry is introduced for pre-polymerization to enable a better particle shape to be formed at the initial reaction stage of a polymer, and then the reaction temperature is increased, and bulk polymerization is performed; the polymer can continuously react under the condition of keeping the particle shape, and higher activity is realized. The obtained polybutene-1 product has high isotacticity and excellent particle shape.

Description

technical field [0001] The invention belongs to the field of olefin polymerization reaction, and in particular relates to a preparation method of high isotactic polybutene-1. Background technique [0002] Polybutene-1 is a polycrystalline polymer, among which the high isotactic type I crystal polymer has the advantages of good physical comprehensive properties and excellent creep resistance. There are many applications in other fields, especially pipes, which have always occupied a high-end position. However, due to its complex production process and difficult product structure control, the market share has been limited and the industry scale has been small. [0003] Montel Technology Co., Ltd. patent CN99800235.6, uses Ziegler-Natta catalytic system for gas phase polymerization, polymerizes in the first gas phase tank at 60°C for 11 hours, yield 1.4kgPB / g catalyst, and then enters the second gas phase tank for polymerization at 70°C 9 hours, yield 5kgPB / g catalyst. Such ...

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
IPC IPC(8): C08F10/08C08F2/06C08F2/02
Inventor 张晓萌毕福勇宋文波魏文骏胡慧杰
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap 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