Star-shaped isoprene-styrene copolymer and preparation method thereof

A kind of technology of isoprene and polyisoprene

Inactive Publication Date: 2013-10-30
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And mostly adopt latex coagulation technology in the prior art, although this technological process can obtain the high styrene rubber with better performance, the main problem that this method exists is: at first in technology, need to synthesize SBR-1500 or SBR-1500 respectively earlier SBR-1502 latex and high styrene resin emulsion, the two emulsions that pass the analysis are mixed in a certain proportion, and then coagulated and dried to obtain high styrene rubber. The process is relatively long and requires two water phases, oil phases, Initiator preparation and degassing and other synthetic procedures; secondly, in terms of production cost, since the conversion rate of synthetic SBR-1500 or SBR-1502 latex monomer is only 70%, unreacted monom

Method used

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  • Star-shaped isoprene-styrene copolymer and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In a jacketed 15L stainless steel reactor, the system was replaced 3 times with argon gas. Add 4315g of cyclohexane, 420g of styrene (accounting for 35% of the total amount of monomers), 280g of isoprene (accounting for 23.3% of the total amount of monomers) in the polymerization kettle, add 12.1mmol of n-butyllithium, and heat up to 50°C, polymerize for 80min, and then press the mixture of 4.32g THF, 2194g cyclohexane, 300g styrene (25% of the total monomers), and 200g isoprene (16.7% of the total monomers) Put it into the polymerization tank and continue to react for 60min. After the monomer is completely converted, the temperature is raised to 70°C, and 3.1mmolSnCl is added. 4 The coupling agent is used for coupling reaction, and the reaction time is 60 minutes. After the coupling reaction was completed, the coupled reaction mixture was treated with water, 100 g of water and 12 g of antioxidant 1010 [tetrakis-(4-hydroxy-3,5-tert-butylphenylpropionic acid) pentaeryth...

Embodiment 2

[0033] In a jacketed 15L stainless steel reactor, the system was replaced 3 times with argon gas. Add 4444g of cyclohexane, 330g of styrene (accounting for 27.5% of the total amount of monomers), 300g of isoprene (accounting for 25% of the total amount of monomers) in the polymerization kettle, and accurately add 24.1mmol of n-butyllithium, Raise the temperature to 60°C, polymerize for 50 minutes, and then add a mixture of 8.64g THF, 2088g cyclohexane, 330g styrene (27.5% of the total monomers), and 240g isoprene (20% of the total monomers) Press into the polymerization tank to continue the reaction for 70 minutes. After the monomer is completely converted, the temperature is raised to 80 ° C, and 6.6 mmol SnCl is added in two times. 4 (Joining Sncl for the first time 4 80% of the total amount, after 15 minutes of reaction, add the remaining 20%) coupling agent to carry out the coupling reaction, and the reaction time is 80 minutes. After the coupling reaction was completed,...

Embodiment 3

[0037] In a jacketed 15L stainless steel reactor, the system was replaced 3 times with argon gas. Add 2044g of cyclohexane in the polymerization kettle, 324g of styrene (accounting for 27% of the total amount of monomers), 396g of isoprene (accounting for 33% of the total amount of monomers), add 8.1mmol of n-butyllithium, and heat up to 60°C, polymerize for 50min, and then press the mixture of 2.16g THF, 3777g cyclohexane, 216g (accounting for 18% of the total amount of monomers) styrene, and 264g (accounting for 22% of the total amount of monomers) of isoprene Put it into the polymerization tank and continue to react for 70min. After the monomer is completely converted, the temperature is raised to 80°C, and 2.2mmolSnCl is added in two times. 4 (Joining Sncl for the first time 4 80% of the total amount, after 15 minutes of reaction, add the remaining 20%) coupling agent to carry out the coupling reaction, and the reaction time is 80 minutes. After the coupling reaction is ...

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Abstract

The invention provides a star-shaped isoprene-styrene copolymer containing a random transition section and a preparation method thereof. The star-shaped isoprene-styrene copolymer is characterized in that the structural formula is [I1-S1-I2/S2]n-Y,], wherein Y is Si or Sn, n is a branching degree, n is more than or equal to 2.5 and less than or equal to 4, and I1-S1 is a transition section copolymer of polystyrene and polyisoprene; I2/S2 is a random section copolymer of the polystyrene and the polyisoprene, the mass fractions of transition sections of the polystyrene and the polyisoprene are 40-75wt%, and the mass fractions of random sections of the polystyrene and the polyisoprene are 25-60wt%. High styrene rubber disclosed by the invention has the characteristics of high hardness and good intensity and elasticity; when the high styrene rubber is used simultaneously with multiple synthetic rubber or natural rubber, the properties of rigidity, hardness, wearing resistance, tear resistance, dielectricity and the like of rubber products can be improved, and the high styrene rubber can be widely applied to the rubber processing fields of tires, tapes, rubber tubes, rubber overshoes and the like and other industries and can be further used for modifying synthetic plastics.

Description

technical field [0001] The present invention relates to a kind of isoprene-styrene star-shaped copolymer containing random gradient segment and its preparation method. The synthesized polymer is characterized by high hardness, high wear resistance and good elasticity of star-shaped high-styrene rubber . Background technique [0002] For a copolymer composed of isoprene and styrene, the bound styrene is generally 23-30%. If the bound styrene content is high, the resulting copolymer will have greater plasticity; otherwise, the copolymer will have greater elasticity. Generally, copolymers with a styrene binding amount of 45% to 70% in the molecular structure are called high-styrene rubbers, and those with a combined styrene content of more than 70% are called high-styrene resins. Due to the high amount of bound styrene in high styrene rubber, its physical properties are different from those of general-purpose styrene-butadiene rubber. High styrene rubber is rarely used alone....

Claims

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Application Information

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IPC IPC(8): C08F297/04C08F2/38C08F8/42
Inventor 史工昌董静康安福王锋龚光碧崔英宋同江张华强杨绮波陶惠平梁滔陈建刚怀惠珍周漫史蓉王琦
Owner PETROCHINA CO LTD
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