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Method for preparing medium-high vinyl block-free solution-polymerized butylbenzene and product thereof

A technology of styrene-butadiene solution and high vinyl, which is applied in the field of styrene-butadiene solution without block of medium and high vinyl

Inactive Publication Date: 2011-07-20
周铁生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the impact of the remaining 1% block on the properties of rubber is still relatively obvious, and the preparation of solution-polymerized styrene-butadiene rubber that basically does not contain blocks is still a technical problem that is difficult to solve at present.
[0004] Therefore, the preparation method of above-mentioned existing solution polystyrene-butadiene obviously still has deficiency and defective, and demands urgently further improving

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In the single-tank continuous polymerization device, styrene and 1 / 3 of the reaction volume of butadiene were continuously added from the bottom with a metering pump, n-butyllithium initiator and structure regulator were continuously added from the bottom with a metering pump, in the middle of the polymerization tank The remaining 2 / 3 parts of butadiene was continuously added with a metering pump, and the materials were continuously added under the protection of nitrogen. The concentration of the regulator in the solution system is 200 ppm, the mass concentration of butadiene and styrene in the polymerization solution system is 15%, and the mass ratio of butadiene to styrene is 60:40. The polymerization temperature is 131°C. When the polymerization reaches a steady state and the outlet molecular weight reaches the set value, a terminator and antioxidant are added. The product solution polymerized styrene butadiene (SSBR) glue is coagulated and dried, and its structure is...

Embodiment 2

[0032] On the single-tank continuous polymerization unit, styrene and 0.5 reaction volume of butadiene were continuously added from the bottom with a metering pump, n-butyllithium initiator and structure regulator were continuously added from the bottom with a metering pump, and metered in the middle of the polymerization tank The pump continuously adds the remaining 0.5 parts of butadiene, and the materials are continuously added under the protection of nitrogen. Wherein, the concentration of the regulator in the solution system is 2000 ppm, the mass concentration of butadiene and styrene in the polymerization solution system is 25%, and the mass ratio of butadiene to styrene is 75:25. The polymerization temperature is 150°C. When the polymerization reaches a steady state and the outlet molecular weight reaches the set value, a terminator and antioxidant are added. The product solution polymerized styrene butadiene (SSBR) glue is coagulated and dried, and its structure is show...

Embodiment 3

[0035] On the single-tank continuous polymerization device, styrene and 0.4 reaction volume of butadiene were continuously added from the bottom with a metering pump, n-butyllithium initiator and structure regulator were continuously added from the bottom with a metering pump, and metered in the middle of the polymerization tank. The pump continuously added the remaining 0.6 parts of butadiene, and the materials were continuously added under the protection of nitrogen. Wherein, the concentration of the regulator in the solution system is 1000 ppm, the mass concentration of butadiene and styrene in the polymerization solution system is 20%, and the mass ratio of butadiene to styrene is 68:32. The polymerization temperature is 140°C. When the polymerization reaches a steady state and the outlet molecular weight reaches the set value, a terminator and antioxidant are added. The product solution polymerized styrene butadiene (SSBR) glue is coagulated and dried, and its structure is...

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Abstract

The invention discloses a method for preparing medium-high vinyl block-free solution-polymerized butylbenzene and a product thereof. The method mainly comprises the following steps of: A, undergoing a polymerization reaction on a vinyl aromatic hydrocarbon and an insufficient reacting dose of conjugated diene; and B, continually reacting the remaining reacting dose of conjugated diene. In a medium-high vinyl block-free solution-polymerized butylbenzene product, the content of a styrol block is zero, and the content of the vinyl is between 25 percent and 60 percent. In the method, n-butyl lithium is taken as an initiator for anionic polymerization, a compound product of alkyl tetrahydrofurfuryl ether and sodium alkyl benzene sulfonate is taken as a structure modifier, the alkyl tetrahydrofurfuryl ether can effectively adjust the content of vinyl in the product, the sodium alkyl benzene sulfonate can always keep high reaction activity, and further tail end functionalization is promoted; and high-temperature continuous polymerization is adopted, so that the produce efficiency of the product can be increased, and the product with wide molecular weight distribution can be produced; and the styrol block in the product is eliminated through stepwise reaction, so that practical requirements on production can be met.

Description

Technical field [0001] The invention relates to a method for synthesizing solution polymerized styrene-butadiene rubber in the field of anionic polymerization, in particular to a high-temperature continuous polymerization process and segmented feeding to eliminate blocks to prepare medium-to-high vinyl groups with wide molecular weight distribution and easy processing. No block solution polystyrene butadiene product method. Background technique [0002] Solution-polymerized styrene butadiene rubber is a copolymer of butadiene and styrene in a hydrocarbon solvent using organic lithium to initiate anionic polymerization. It has abrasion resistance, cold resistance, low heat generation, high resilience, low shrinkage, and good color. , Less ash, high purity and fast curing speed. According to reports, compared with emulsion polystyrene butadiene rubber, tires made of new solution polymerized styrene butadiene rubber have 30% reduction in rolling resistance, 3% increase in skid resi...

Claims

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Application Information

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IPC IPC(8): C08F236/10C08F236/06C08F2/38C08F4/48
Inventor 周铁生
Owner 周铁生
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