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Preparation method of styrene-butadiene-styrene block copolymer

A technology of styrene block and butadiene is applied in the field of preparation of styrene-butadiene-styrene block copolymer, which can solve the problems of lack of model, single model and low vinyl content, so as to broaden the application field Effect

Pending Publication Date: 2020-05-29
SHANDONG RUNKE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the model of butadiene styrene block copolymer in my country is single, and the vinyl content in commercially available products is low, and there is a lack of butadiene styrene block copolymer models suitable for high-end modification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of preparation method of styrene-butadiene-styrene block copolymer, it comprises the following steps:

[0022] (1) Set the temperature at 60°C and the pressure at 1.2Mpa. Nitrogen is introduced into the reactor, 4.7kg of cyclohexane and 3.1kg of n-hexane are added first, and 3.3kg of butane is charged into the mixed solvent of cyclohexane and n-hexane. Diene, add 2mol n-butyllithium, add 12.8kg styrene, add 1mol of sodium dodecylbenzenesulfonate and pentamethyldiethyltriammonium composite structure regulator, wherein sodium dodecylbenzenesulfonate The molar ratio with pentamethyldiethyltriammonium is 1:1, adding 0.2mol coupling agent antimony trichloride to carry out temperature rise and pressure polymerization;

[0023] (2) Add hydroquinone to the polymerization reaction solution prepared in step (1), pour the polymerization reaction solution into water to crystallize, wash, granulate with a twin-bar screw machine, and dry at 60°C to obtain styrene- Butadiene-s...

Embodiment 2

[0025] A kind of preparation method of styrene-butadiene-styrene block copolymer, it comprises the following steps:

[0026] (1) Set the temperature at 95°C and the pressure at 1.5Mpa. Introduce argon into the reactor, add 5.15kg of cyclohexane and 6.3kg of n-heptane first, and fill 3.3kg of butane into the cyclohexane and n-heptane Alkene, add 6mol isobutyllithium, then add 12.8kg styrene, 1.5mol sodium dodecylbenzenesulfonate and tetramethyl ethyl diammonium composite structure regulator, wherein sodium dodecylbenzenesulfonate and The mol ratio of pentamethyldiethyltriammonium is 3:1, adds 0.6mol tin tetrachloride and carries out temperature rise and pressure polymerization;

[0027] (2) Add 2,4,6-tri-tert-butylphenol to the polymerization reaction solution prepared in step (1), pour the polymerization reaction solution into ethanol to crystallize, wash, granulate, and dry at 60°C to obtain Styrene-butadiene-styrene block copolymer. The content of styrene blocks was determ...

Embodiment 3

[0029] A kind of preparation method of styrene-butadiene-styrene block copolymer, it comprises the following steps:

[0030] (1) Set the temperature at 60°C and the pressure at 1.2Mpa. Helium is introduced into the reactor, and a mixed solvent of 5.65kg of cyclohexane, 6.6kg of normal hexane and 6.6kg of normal heptane is added. Fill 3.3kg butadiene into the mixed solvent of alkane, add 10mol sec-butyllithium, then add 12.8kg styrene, 0.5mol sodium dodecylbenzenesulfonate and pentamethyldiethyltriamine to adjust the composite structure Agent, wherein the mol ratio of sodium dodecylbenzenesulfonate and pentamethyldiethyltriammonium is 5:1, add 0.1mol antimony trichloride to carry out temperature rise and pressure polymerization;

[0031] (2) Add tris[2.4-di-tert-butylphenyl] phosphite in the polymerization reaction solution that step (1) makes, pour the polymerization reaction solution into n-propanol and crystallize out, wash, granulate, 60 °C drying to obtain a styrene-butad...

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Abstract

The invention relates to a preparation method of a styrene-butadiene-styrene block copolymer. The problems that a commercially available butadiene-styrene copolymer is low in vinyl content and high inblock rate, and molecular chain breakage easily occurs in the bromination process are solved. The preparation method comprises the following steps: introducing inert protective gas into a reaction container at the temperature of 60-130 DEG C under the pressure of 1.2-1.7 Mpa, adding an organic solvent, introducing butadiene into the organic solvent, adding an organic lithium catalyst, adding styrene, a composite structure regulator and a coupling agent, and heating and pressurizing to carry out a polymerization reaction; and (2) adding an antioxidant into the polymerization reaction solutionprepared in the step (1), pouring the polymerization reaction solution into a crystallizing agent, crystallizing, precipitating, washing, granulating, and drying at 60-80 DEG C to obtain the styrene-butadiene-styrene block copolymer. The preparation method can be widely applied to the technical field of preparation of styrene-butadiene-styrene block copolymers.

Description

technical field [0001] The invention relates to the field of preparation methods of styrene-butadiene-styrene block copolymers, in particular to a preparation method of styrene-butadiene-styrene block copolymers. Background technique [0002] Styrene-butadiene-styrene block polymer is one of the most produced thermoplastic elastomers in the world. It has the elasticity of rubber at room temperature and melts into a plastic material at high temperature. Because of its excellent tensile properties, good low temperature resistance, air permeability, solubility and unique skid resistance, it is widely used in shoemaking, plastic modification, asphalt modification and other fields. But at present, my country's butadiene styrene block copolymer has a single model, and the vinyl content of commercially available products is low, and there is a lack of butadiene styrene block copolymer models suitable for high-end modification. [0003] The new green polymer brominated flame retard...

Claims

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Application Information

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IPC IPC(8): C08F297/04C08F2/38
CPCC08F297/044C08F2/38
Inventor 吴多坤秦善宝杨延钊杨效禹孙盛元杨丽丽袁美
Owner SHANDONG RUNKE CHEM