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

Preparation method of silicon-containing HVPB (high vinyl polybutadiene)

A high-vinyl polybutadiene and butadiene technology, applied in the direction of rolling resistance optimization, road transportation emission reduction, etc., can solve the problems of poor compatibility of silica and high Mooney viscosity, and achieve good dispersion and door-to-door Effects of low nylon viscosity and improved processability

Inactive Publication Date: 2018-10-02
QINGDAO UNIV OF SCI & TECH
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the problems of high Mooney viscosity and poor compatibility with white carbon black existing in high vinyl polybutadiene in the prior art, the present invention provides a silicon-containing macromolecule grafted high vinyl polybutadiene The preparation method is to graft silicon-containing macromonomers to the main chain of molybdenum-based high-vinyl polybutadiene through the macromonomer copolymerization method, and synthesize a graft with good processability and good compatibility with white carbon black. dendrimer vinyl polybutadiene

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 of silicon-containing HVPB (high vinyl polybutadiene)
  • Preparation method of silicon-containing HVPB (high vinyl polybutadiene)
  • Preparation method of silicon-containing HVPB (high vinyl polybutadiene)

Examples

Experimental program
Comparison scheme
Effect test

preparation example

[0038] This preparation example is used to illustrate the silicon-containing macromer provided by the present invention and its preparation method.

[0039] Add 100 mL of 0.14 g / mL butadiene (abbreviated as Bd) n-hexane solution to a 500 mL reaction flask successively under nitrogen protection, heat to 60° C., add 1.6 mL of 1.6 M initiator n-butyllithium (referred to as n-BuLi), after two hours of polymerization, add 154g of octamethylcyclotetrasiloxane (abbreviated as D4) and 25mL of accelerator N,N-dimethylamide (abbreviated as DMF), and polymerize for another 2 hours to prepare the PB segment The molecular weight is 7000, the total molecular weight is 1.6×10 4 silicon-containing macromers.

[0040] Implementation column 1

[0041] In the 3L polymerization kettle under nitrogen atmosphere, add 2.5L of 140g / L butadiene n-hexane solution successively, 3.5g silicon-containing macromer, take the amount of butadiene as the benchmark, the amount of silicon-containing macromer 1...

Embodiment 2

[0043] Prepared by the same method as in Example 1, the difference is that, based on the amount of butadiene, the amount of silicon-containing macromers is 3% by weight, and Si-g- HVBR3 vulcanizate, its properties are listed in Table 2.

Embodiment 3

[0045] Prepared by the same method as in Example 1, the difference is that, based on the amount of butadiene, the amount of silicon-containing macromers is 5% by weight, and Si-g- HVBR5 vulcanizate, its properties are listed 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
tensile strengthaaaaaaaaaa
tear strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of silicon-containing HVPB (high vinyl polybutadiene) and solves the problem that HVPB is high in Mooney viscosity and has poor compatibility with white carbon black in the prior art. The preparation method comprises steps as follows: in the presence of a molybdenum-based catalyst, butadiene and a branching agent are polymerized in an organic solvent attemperature of 0-70 DEG C and under the pressure of 0.1-0.4 MPa for 1-10 h, a main chain of molybdenum-based HVPB is grafted with silicon-containing macromolecules, wherein the branching agent is a silicon-containing macromolecule monomer. The invention also provides vulcanized rubber of silicon-containing HVPB. Compared with conventional rubber materials, silicon-containing HVPB improves the compatibility of white carbon black and a rubber material, the processing performance is improved, and the rolling resistance and dynamic heat generation of a tire tread are reduced on the premise that excellent wet-skid resistance is guaranteed.

Description

Technical field: [0001] The invention relates to the field of rubber synthesis, in particular to a method for preparing silicon-containing high vinyl polybutadiene. Background technique: [0002] High-vinyl polybutadiene has a large number of vinyl groups on the side chain, and the main chain is saturated alkane. It has excellent properties such as high resistance to wet skid, low heat generation, low rolling resistance and aging resistance. It is used to prepare high-safety, "Green" tire material for energy saving and emission reduction. Among them, molybdenum-based coordination polymerization is one of the methods to prepare high-vinyl polybutadiene. It does not require additional structure regulators. The 1,2-structure content in the product can reach more than 80% and has no gel. It is widely used in industrial tires. Pay attention to. However, due to the stable active center of molybdenum-based catalysts, chain transfer and chain termination are not easy to occur, whi...

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): C08F283/12C08F236/06
CPCC08F283/12C08F236/06Y02T10/86
Inventor 华静刘金慧耿洁婷马玉
Owner QINGDAO UNIV OF SCI & TECH
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