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Method for restraining gelatin during preparation of conjugated diolefin and monovinyl aromatic hydrocarbons random polymers

A technology of conjugated diene and monovinyl arene, which is applied in the field of inhibiting gel, can solve the problems of limiting the application range of the gel inhibiting system, increasing the production cost and the like, and achieves the advantages of inhibiting the formation of gel, low cost and easy availability of raw materials. Effect

Active Publication Date: 2010-06-23
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This gel inhibition method is only suitable for the preparation of coupled copolymers, which limits the scope of use of the gel inhibition system
[0005] Mentioned in US 4,136,244 is the method of synthesizing solution-polymerized styrene-butadiene rubber using weak chain transfer agents such as toluene and chlorobenzene as gel inhibitors. The method adopts a continuous polymerization process and uses cyclic ether (THF) as a structure regulator. There is a recovery problem in the post-processing process of the glue inhibitor, which greatly increases the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The test was carried out in a 10-liter polymerization kettle by batch polymerization method. Under the protection of high-purity nitrogen, 4810g of mixed solvent (cyclohexane and n-hexane, weight ratio of 88:12), 225g of styrene, and additive THF11 were added to the kettle in sequence. .4g, the polymerization system was purified by high-purity N 2 After displacement and deoxidation, 624 g of 1,3-butadiene, 5.9 g of a coagulant 1-hexene, and 0.73 g of n-butyllithium were added, and then a copolymerization reaction was carried out. The polymerization initiation temperature is 50° C., and the reaction pressure is 0.1-0.3 MPa. When the polymerization temperature reaches 80° C., add 0.30 g of the second-step initiator n-butyllithium, and when the conversion rate reaches 100%, add 0.33 g of tin tetrachloride to the polymerization kettle to continue the coupling reaction. After the coupling reaction is finished, add 0.5 g of terminator isopropanol and anti-aging agent 2246 to...

Embodiment 2

[0040] The test was carried out in a 10-liter polymerization kettle by a batch polymerization method. Under the protection of high-purity nitrogen, 4810 g of mixed solvent (cyclohexane and n-hexane, with a weight ratio of 88:12), 225 g of styrene, and the additive THF were sequentially added to the kettle. 11.4g, the polymerization system was treated with high-purity N 2 After displacement and deoxidation, 624 g of 1,3-butadiene, 59 g of a coagulation inhibitor 1-hexene, and 0.73 g of n-butyllithium were added, and then a copolymerization reaction was carried out. The polymerization initiation temperature is 50° C., and the reaction pressure is 0.1-0.3 MPa. When the polymerization temperature reaches 80° C., add 0.30 g of the second-step initiator n-butyllithium, and when the conversion rate reaches 100%, add 0.33 g of tin tetrachloride to the polymerization kettle to continue the coupling reaction. After the coupling reaction, 0.5 g of terminator isopropanol and 10 g of anti...

Embodiment 3

[0042] The test was carried out in a 10-liter polymerization kettle by a batch polymerization method. Under the protection of high-purity nitrogen, 4810 g of mixed solvent (cyclohexane and n-hexane, with a weight ratio of 88:12), 225 g of styrene, and the additive THF were sequentially added to the kettle. 11.4g, the polymerization system was treated with high-purity N 2 After displacement and deoxidation, 624 g of 1,3-butadiene, 118 g of coagulation inhibitor 1-hexene, and 0.73 g of n-butyllithium were added, and then a copolymerization reaction was carried out. The polymerization initiation temperature is 50° C., and the reaction pressure is 0.1-0.3 MPa. When the polymerization temperature reaches 80° C., add 0.30 g of the second-step initiator n-butyllithium, and when the conversion rate reaches 100%, add 0.33 g of tin tetrachloride to the polymerization kettle to continue the coupling reaction. After the coupling reaction, 0.5 g of terminator isopropanol and 10 g of anti-...

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Abstract

The invention relates to a method for depressing gel coagulating in preparation process of conjugated diene and single-ethene arene random copolymer using alpha-alkene or mixture thereof as gel depressor. The said method not only can effectively depress the formation of gel and the raw material of gel depressor is easy to obtain and the price thereof is low, especially adapted for large scale industry.

Description

technical field [0001] The invention relates to a method for inhibiting gelation in the preparation process of conjugated diene and vinyl aromatic random copolymers using α-olefin or its mixture as a gel inhibitor, more specifically, it relates to α-olefin or its mixture The mixture is a method for inhibiting gel in the preparation process of lithium-based anion solution polyconjugated diene and monovinyl arene random copolymer. Background technique [0002] The current production of conjugated diene / monovinylarene copolymers suitable for automotive tire tread compounds can be produced in continuous or batch processes. But whether it is a continuous process or a batch process, a major problem that needs to be solved is the inhibition of gel in the reactor. Gel phenomenon has always been a problem that plagues the conjugated diene / monovinylarene anionic copolymerization process. In the reactor, some "active" macromolecules remain in the reactor for a long time due to the ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F2/40C08F212/08C08F4/48C08K5/01
Inventor 王世朝梁爱民李传清李伟刘慧玲孙文娟周微频于国柱栾贵玺闫冰张杰
Owner CHINA PETROLEUM & CHEM CORP