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

Preparation of star-branched polyisobutene or isobutene-diene rubber

A technology of polyisobutylene and butyl rubber, which is applied in the field of polymer block copolymerization and can solve problems such as swelling phenomenon

Active Publication Date: 2009-01-28
CHINA PETROLEUM & CHEM CORP +1
View PDF1 Cites 39 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to obtain a balance between the two, one of the methods is to broaden the relative molecular mass distribution of butyl rubber, and simple physical mixing of high molecular weight and low molecular weight polymers can broaden the molecular weight distribution, but It will also bring other processing problems, such as large swelling after flowing out of the forming die, etc.

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 of star-branched polyisobutene or isobutene-diene rubber
  • Preparation of star-branched polyisobutene or isobutene-diene rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This experiment is a comparative experiment, comparing the star-branched butyl rubber prepared without adding the above-mentioned polystyrene-isoprene silicon-chloride block copolymer and adding polystyrene-isoprene silicon-chloride block copolymer .

[0024] Polymer bottle 1 # No added polystyrene-isoprene silyl chloride block copolymer, 2 # Add 0.0568 grams of polystyrene-isoprene silicon-chloride block copolymer (relative to 4% of the monomer mass,) in the bottle, and add 10 ml Methyl chloride was dissolved in 10ml cyclohexane. After the dissolution is complete, add 1ml 2-chloro-2,4,4-trimethylpentane TMPCl (0.002M), 0.5ml hexahydropyridine (0.004M) nucleophile and 1ml TiCl 4 (0.036M) co-initiator, aged for 5min, added a mixture of 2ml isobutene and 0.066ml isoprene, polymerized for 1h, precipitated with methanol, washed and dried. The products obtained are 1 # ,2 # . 2 # The molecular weight of the product increased significantly, the molecular weight distri...

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 relates to a preparation method of a star branching polyisobutene or a butyl rubber. The block multipolymer of polystyrene / isoprene with the tail end thereof containing a Si-Cl group or the block multipolymer of polystyrene / butadiene with the tail end containing a Si-Cl group is used as a grafting agent for the initiation of the cationic polymerization and directly participates in the cationic polymerization; the cationic polymerization initiated by the Si-Cl group is participated with a branching reaction for preparing the products of star branching polyisobutene and butyl rubber by a unsaturated link. The preparation method has the advantage that a composed branched chain polymer expresses different processing performances from the molecule of the original linear branched chain polymer on the aspects of tagma intensity and stress loosening balance. The performance is excellent; more thermoplastic elastomers are related.

Description

technical field [0001] The present invention relates to the method for macromolecular block copolymerization, more specifically, relate to in cationic polymerization system, add the polystyrene / isoprene block copolymer containing silicon chloride group or the end contains silicon chloride group A method for preparing star-branched polyisobutylene or star-branched butyl rubber from polystyrene / butadiene block copolymer. Background technique [0002] Butyl rubber has good air tightness and excellent comprehensive performance, so they are important products in the tire industry. However, butyl rubber (IIR) and its halogenated butyl rubber have problems such as processing difficulties. It is generally believed that the strength of raw rubber is related to molecular weight. The larger the molecular weight, the higher the strength of raw rubber. The stress relaxation rate is also a function of molecular weight. The increase in molecular weight will slow down the relaxation rate. ...

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): C08F297/00
Inventor 李树新郭文莉伍一波龚惠勤金玉顺商育伟吕占霞赵锦波
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