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

SBS containing 1,2 structure uniformly distributed butadiene block and hydride thereof and preparation and application method thereof

A technology of uniform distribution and butadiene, applied in SBS containing 1,2 structure uniform distribution of butadiene block and its hydride, preparation and application, can solve the problem of uneven distribution of butadiene

Active Publication Date: 2019-01-15
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The existing method for synthesizing SBS cannot solve the problem of uneven distribution of 1,2-structure butadiene in the B block. The third purpose of the present invention is to provide a butadiene that realizes SBS by simply improving the synthesis conditions of the process. A Method for the Uniform Distribution of 1,2 Structures in Diene Blocks

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
  • SBS containing 1,2 structure uniformly distributed butadiene block and hydride thereof and preparation and application method thereof
  • SBS containing 1,2 structure uniformly distributed butadiene block and hydride thereof and preparation and application method thereof
  • SBS containing 1,2 structure uniformly distributed butadiene block and hydride thereof and preparation and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Add 3500mL of cyclohexane solution with a mass fraction of 10% n-hexane in a 5-liter steel-made polymerization kettle under nitrogen protection, then simultaneously inject THF 1.5g and styrene 50mL into the polymerization kettle with a syringe. After the temperature of the solvent rises to 55-65°C, inject 6.5mL of 0.5mol / L n-butyllithium into the polymerization kettle with a syringe to initiate the first stage of polymerization. The polymerization pressure is 0.2-0.3MPa. After 23-25min of polymerization, the When the initial temperature of the second stage is controlled at 66 ° C, 340 mL of butadiene solution mixed with 0.95 mL tetrahydrofurfuryl alcohol ethyl ether in the butadiene metering tank is uniformly pressed into the polymerization kettle within 16 minutes with nitrogen gas, and if necessary, the Add cooling water to control the temperature rise rate, that is, the temperature rise rate is controlled at (0.5-1) °C / min, and the second-stage polymerization temperat...

Embodiment 2

[0061] With the process conditions in Example 1 unchanged, only the styrene of the first section and the third section polymerization is all set to 55mL, the n-butyllithium 4mL that the first section initiates is used, and activator selects DTHFP for use, and its consumption 0.28mL, the second stage uses 325mL of butadiene, DTHFP is 1.0mL when it is miscible in butadiene, the initial temperature of the second stage is controlled at 70°C, and the butadiene solution of ditetrahydrofurfuryl propane is heated within 18 minutes with nitrogen gas Press evenly into the polymerization kettle.

[0062] Results: The content of 1,2-addition units in polybutadiene units in different polymerization time periods in the butadiene chain growth stage during the polymerization process, and the corresponding polymerization temperature are shown in Table 1.

[0063] Table 1 Corresponding relationship between 1,2-addition unit content and temperature in different polymerization stages of butadiene...

Embodiment 3

[0069] With the process conditions in Example 1 constant, the styrene of the first section and the third section polymerization is all set as 55mL, the n-butyllithium 5mL that the first section initiates is used, and activator selects tetrahydrofurfurylamine for use, and its consumption 0.35mL, 325mL of butadiene is used in the second stage, 1.0mL of tetrahydrofurfurylamine is miscible in butadiene, the initial temperature of the second stage is controlled at 68°C, and the butadiene solution of tetrahydrofurfurylamine is filled with nitrogen in the Press evenly into the polymerization kettle within 18 minutes.

[0070] Results: Table 2 shows the content of 1,2-addition units in polybutadiene units at different polymerization time periods in the butadiene chain growth stage and the corresponding polymerization temperature in the polymerization process.

[0071] Table 2 Corresponding relationship between 1,2-addition unit content and temperature in different polymerization stage...

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
molecular weight distributionaaaaaaaaaa
molecular weight distributionaaaaaaaaaa
molecular weight distributionaaaaaaaaaa
Login to View More

Abstract

The invention discloses SBS containing a 1,2 structure uniformly distributed butadiene block and a hydride thereof and a preparation and application method thereof. According to the preparation process of the SBS, styrene reacts with an initiator under the action of an activator to initiate first-stage polymerization. During the second-stage polymerization process, a 1,2 structure regulator is dissolved in butadiene and the solution is uniformly added to a polymerization kettle within 16 to 18 minutes, and the reaction is further carried out for 8-12 min after the addition. During the third-stage polymerization, styrene can be used for the polymerization or a coupling agent can be adopted for coupling, the content of the 1,2-addition unit in the polybutadiene segment of the SBS is 38-42% and the 1,2-addition unit is uniformly distributed. SEBS obtained after hydrogenation has good compatible stability with naphthenic oil or white oil, and the oil has low mobility in SEBS and high lighttransmittance, and can be widely applied to transparent elastic materials.

Description

technical field [0001] The present invention relates to a kind of SBS and its hydrogenated product SEBS, especially to a kind of SBS containing 1,2 structure uniformly distributed butadiene block and SEBS elastomer containing short-chain branched uniformly distributed EB block, and anionic polymerization synthesis Method for polystyrene-butadiene-styrene block polymers containing 1,2 structure uniformly distributed butadiene blocks and hydrogenated products thereof, also relates to SEBS elastomers containing short-chain branched uniformly distributed EB blocks as The application of transparent elastic materials belongs to the field of SBS or SEBS elastomers. Background technique [0002] Styrene and conjugated diene are directional polymerized into a triblock copolymer under the trigger of n-butyllithium in a cyclohexane solution. The polymer molecular chain can be linear or star-shaped. This polymer is commonly known as thermoplastic elastic A material of the body. For ex...

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): C08F297/04C08F8/04C08F2/38
CPCC08F2/38C08F8/04C08F297/044
Inventor 张建国吕志龙王旭佘振银蒋文英
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