Claims
- 1. A catalytic system for obtaining amino-functionalized diene polymers with high 1,4-trans linkage content, consisting essentially of at least one hydrocarbon solvent, one compound A of a IIIA group metal, one compound B of an alkaline earth metal and one aminolithium initiator C, wherein said initiator C is selected from the group consisting of a lithium amide and a polymer obtained by anionic means presenting a C—Li bond and an amino function.
- 2. The catalytic system of claim 1, wherein said aminolithium initiator C is a lithium amide.
- 3. The catalytic system of claim 1, wherein said aminolithium initiator C is a polymer obtained by anionic means, presenting a C—Li bond and an amino function.
- 4. The catalytic system of claim 1, wherein initiator C is lithium dibutyl amide or lithium hexamethylene imide.
- 5. The catalytic system of claim 1, wherein compound A is a trialkylaluminum, wherein the trialkylaluminum has an alkyl group having carbon atoms in a range from 1 to 12.
- 6. The catalytic system of claim 5, wherein compound A is trioctylaluminum.
- 7. The catalytic system of claim 1, wherein compound B is selected from the group consisting of a barium alcoholate, a strontium alcoholate and a calcium alcoholate.
- 8. The catalytic system of claim 7, wherein compound B is barium ethyl diglycolate or barium nonylphenoxide.
- 9. The catalytic system of claim 1, wherein said hydrocarbon solvent is selected from the group consisting of toluene, cyclohexane, and mixtures thereof.
- 10. The catalytic system of claim 1, wherein initiator C is a lithium amide of the formula XLi where X is —NR1R2 or R1 and R2 each being an alkyl group where the total number of carbon atoms in R1+R2 is 2 to 15 and n being a number from 2 to 15.
- 11. The catalytic system of claim 1, wherein initiator C and compound B are present in a C/B molar ratio of between 0.2 and 4.
- 12. The catalytic system of claim 1, wherein said compounds A and B are present in an A/B molar ratio range between 0.5 and 5.
Priority Claims (1)
Number |
Date |
Country |
Kind |
99 00080 |
Jan 1999 |
FR |
|
CROSS REFERENCE TO RELATED APPLICATION(S)
The present application is a divisional application of U.S. application Ser. No. 09/478,738, filed Jan. 6, 2000, now U.S. Pat. No. 6,624,267, which claims priority to French Application No. FR99/00080, filed Jan. 6,1999.
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Non-Patent Literature Citations (3)
Entry |
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Chemical Abstracts No. 99511, vol. 112, No. 12, Shimida et al. “Manufacture of Conjugated Diene Polymers,” Mar. 19, 1990, XP002113272. |
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