Title:
ジリチウム開始剤の製造方法及びその使用
Document Type and Number:
Japanese Patent JP4445135
Kind Code:
B2
Abstract:
This invention is a process for making a difunctional lithium initiator which comprises reacting a secondary or tertiary lithium alkyl with a diisopropenylbenzene compound in the presence of diethyl ether at a temperature of 25 to 50° C. wherein the molar ratio of the diethyl ether to the lithium alkyl is from above 0.1:1 to 2:1 and the diisopropenylbenzene compound and the diethyl ether are first mixed together and then added to the lithium alkyl. The molar ratio of the diisopropenylbenzene compound to the lithium alkyl should be as close to 0.5:1 as possible. An excess of lithium alkyl may be used if a product containing both diinitiator and monoinitiator is preferred. It is preferred that the molar ratio of diethyl ether to lithium alkyl be as close to 1:1 as possible.
Inventors:
Grant Wexley, Grant Weissley
Sisra, David Curl
Willis, Carl Leslie
Sisra, David Curl
Willis, Carl Leslie
Application Number:
JP2000575906A
Publication Date:
April 07, 2010
Filing Date:
October 07, 1999
Export Citation:
Assignee:
Clayton Polymers Research B.B.
International Classes:
C07C2/88; C07B61/00; C08F4/48; C07C15/113; C07C15/12; C07F1/02; C08F36/04
Domestic Patent References:
| JP8311134A | ||||
| JP8048709A | ||||
| JP7304810A |
Foreign References:
| GB2270317A | ||||
| GB1048157A |
Other References:
Yu, Y. S.; Dubois, Ph.; Jerome, R.; Teyssie, Ph.,Difunctional Initiators Based on 1,3-Diisopropenylbenzene. 3. Synthesis of a Pure Dilithium Adduct and Its Use as Difunctional Anionic Polymerization Initiator,Macromolecules,1996年,第29巻,第8号 ,第2738頁-第2745頁
Attorney, Agent or Firm:
Yoshio Kawaguchi
Makoto Ono
Akio Ichiiri
Katsuma Osaki
Takamasa Soma
Makoto Ono
Akio Ichiiri
Katsuma Osaki
Takamasa Soma