Unlock instant, AI-driven research and patent intelligence for your innovation.

Styrene-butadiene copolymer as well as preparation method and application thereof

A styrene-butadiene copolymer and copolymer technology, applied in the field of styrene-butadiene copolymer, can solve problems such as high Mooney viscosity, decreased vinyl content, and reduced relative content of butadiene, so as to improve impact resistance and mechanical properties , low styrene content, the effect of improving compatibility

Pending Publication Date: 2021-11-26
CHINA PETROLEUM & CHEM CORP +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional styrene-butadiene block copolymer introduces a large amount of styrene (more than 15% by weight) in the butadiene segment, resulting in the following defects in the final polymer: ① high Mooney viscosity (generally higher than 100 ), it is more difficult to handle in the drying stage, which has an adverse effect on the impact resistance of the terminal resin; ②The introduction of a large amount of styrene reduces the relative content of butadiene, the vinyl content decreases, and the graft crosslinking activity decreases, which affects the final resin. Impact resistance of HIPS resin

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
  • Styrene-butadiene copolymer as well as preparation method and application thereof
  • Styrene-butadiene copolymer as well as preparation method and application thereof
  • Styrene-butadiene copolymer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0054] Concrete, the second aspect of the present invention provides a kind of preparation method of styrene-butadiene copolymer, wherein, described method comprises the following steps:

[0055] (1) In the presence of a solvent and an initiator, at a first temperature, styrene and butadiene are subjected to the first anionic solution polymerization;

[0056] (2) at a second temperature, carry out the second anionic solution polymerization to obtain the styrene-butadiene copolymer;

[0057] The first temperature is different than the second temperature.

[0058] In the present invention, in order to make the styrene-butadiene copolymer have suitable Mooney viscosity and elasticity, when preparing the styrene-butadiene copolymer, the weight ratio of styrene and butadiene has been studied in the present invention, research shows, step (1) Among them, when the weight ratio of styrene and butadiene is 0.05-0.18:1, preferably 0.08-0.14:1, the prepared styrene-butadiene copolymer h...

Embodiment 1

[0113] This embodiment is used to illustrate the styrene-butadiene copolymer provided by the present invention and its preparation method.

[0114] The 5-liter polymerization reactor was replaced with high-purity nitrogen several times until the oxygen content of the entire reaction system was lower than 5 ppm. Under the protection of high-purity nitrogen, add metered hexanaphthene, styrene, butadiene, n-butyllithium successively in still (kind and consumption are shown in Table 1, and the consumption listed in the table is all measured with pure compound); And under specified temperature and reaction pressure, carry out anionic solution polymerization reaction (condition is shown in Table 1), then add terminator and antioxidant (kind and consumption are shown in Table 2, and listed consumption in the table is all measured with pure compound) , and finally obtain the polymerization solution BS of styrene-butadiene copolymer 1 , take out a part of the polymerization solution s...

Embodiment 2-6

[0116] This example is used to illustrate the styrene-butadiene copolymer of the present invention and its preparation method.

[0117] According to the method described in Example 1, the difference is that the parameters shown in Table 1 are used to react, thereby obtaining the polymerization solution BS of the styrene-butadiene copolymer respectively 2 -BS 6 , take out a part of the polymerization solution sample for steam coagulation desolvation treatment, the structure and properties of the obtained polymer are measured, the results are shown in Table 3.

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
Izod notched impact strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of polymer preparation and discloses a styrene-butadiene copolymer as well as a preparation method and application thereof. The styrene-butadiene copolymer is characterized in that: (1) the molecular weight of the styrene-butadiene copolymer is in bimodal distribution; (2) the Mooney viscosity ML1 + 4 at 100 DEG C is 38-58; (3) the viscosity of the 5 wt% rubber-styrene solution at 25 DEG C is 20-40 cp; and (4) based on the total amount of the styrene-butadiene copolymer, the content of a styrene structural unit is 5-15 wt%, and the content of the butadiene structural unit is 85-95 wt%. The molecular weight of the styrene-butadiene copolymer is in bimodal distribution, and the styrene content is low; and the styrene-butadiene copolymer can be used as an aromatic vinyl resin toughening agent, so that the compatibility of a graft polymer and matrix resin can be improved, the impact resistance and mechanical property of modified resin are improved, and meanwhile, the glossiness of the resin is ensured.

Description

technical field [0001] The present invention relates to a kind of styrene-butadiene copolymer, a kind of preparation method of styrene-butadiene copolymer, the styrene-butadiene copolymer prepared by said method, described styrene-butadiene copolymer as rubber toughening agent in aromatic vinyl resin application. Background technique [0002] Low-cis polybutadiene rubber has uniform quality, moderate vinyl content, low gel content, low chroma, molecular chain cis-trans 1,4 structure is randomly distributed, and does not contain transition metals. It is a continuous bulk HIPS and ABS. Best Toughened Rubber. According to the performance requirements of the resin, the microstructure, molecular weight and distribution, Mooney viscosity and 5% styrene solution viscosity of low-cis polybutadiene rubber can be adjusted in a wide range. For HIPS resins with higher impact resistance requirements, generally choose toughened rubber with higher viscosity of 5% styrene solution; for HI...

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): C08F297/04C08F287/00C08F212/08C08F220/44
CPCC08F297/04C08F287/00C08F2500/05C08F212/08C08F220/44
Inventor 李建成王爱东王冬萍刘天鹤鲁文平徐林王雪
Owner CHINA PETROLEUM & CHEM CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com