Organic lithium compound containing tin and its preparation method

A technology of lithium compounds and compounds, applied in the fields of tin organic compounds, lithium organic compounds, organic chemistry, etc., can solve the problems of high chloride ion content in initiators and reduction of chloride ion content, etc.

Inactive Publication Date: 2003-07-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

US3,426,006 mentions the method for preparing trialkyltin lithium compound with 1mol tin protochloride and 3mol alkyllithium reaction; But the chloride ion content is higher in the initiator prepared by this method; For reducing the chloride ion content in US5,502,129, synthesize trialkyl tin lithium with two-step method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0070] The following examples further illustrate the invention without limiting the scope of the invention. Example 1-5 Bu 3 Preparation of SnZLi

[0071] The 100ml three-neck flask equipped with electromagnetic stirring was pumped and filled with nitrogen, then 20ml of the prepared dilithium compound LiZLi was added, and Bu 3 THF solution of SnX, in which the dilithium compound LiZLi and Bu 3 The molar ratio of SnX is 1:1. The reaction was stopped after 2 hours at 10°C. Filtration gave a clear pale yellow solution. The active lithium concentration was determined by double titration (see Gilman and K.F. Cartlidge, J. Organomet. Chem., 1994, 2447). The test data are listed in Table 1: Example 6-25 Bu 3 QUR b Preparation of Li

[0072] The 250ml three-neck flask equipped with electromagnetic stirring was pumped and filled with argon, then the prepared dilithium compound LiZLi was added, and an equimolar amount of Bu was added dropwise. 3 5ml THF solution of SnCl, st...

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PUM

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Abstract

A Sn-contained organolithium compound as anionic polymerization trigger has a formula R3SnYaZYaLi, where R is C1-C20 alkyl, C3-C20 cycloalkyl, C6-C20 aryl, or substituted aryl, Z is straight-chain orbranch-chain C1-C2 2-valence alkyl, C6-C30 arylidene, or substituted aryldiene, Y is conjugated diene homopolymer group, monovinyl arylhydrocarbon homopolymer group, or conjugated diene and monovinylarylhydrocarbon copolymer group, a is 0-6, and at b=0-6. Its preparing process is also disclosed.

Description

technical field [0001] The invention relates to a tin-containing organolithium compound which can be used as an anionic polymerization initiator and a preparation method thereof. Background technique [0002] The use of tin-containing organic lithium compounds as anionic polymerization initiators can make each polymer molecular chain end have initiator residues-containing Sn groups, which has a good effect on reducing the hysteresis loss of polymers. US3,426,006 mentions the method for preparing trialkyltin lithium compound with 1mol tin protochloride and 3mol alkyllithium reaction; However, the content of chloride ions in the initiator prepared by this method is relatively high; in order to reduce the content of chloride ions in US5,502,129, a two-step method is used to synthesize trialkyltin lithium. US5,877,336 mentions that in dimethyl ether, triorganosubstituted tin lithium can be obtained by reacting metallic lithium with bis(triorganotin) at 0-65°C and 2-20 atmospher...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F1/02C07F7/22C07F19/00C08F4/48C08F4/58C08F36/04
CPCC08F4/48C08F36/04C07F7/2212C07F7/2208C08F4/58
Inventor 李传清卢松赵丽赟徐林李伟于国柱梁爱民
Owner CHINA PETROLEUM & CHEM CORP
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