Diamido alkoxides as polymerisation initiators

Details Diamido alkoxides as polymerisation initiators Diamido alkoxides as polymerisation initiators

2006-04-11

2006-04-11

Nazario-Gonzalez, Porfirio (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heavy metal containing

C556S179000, C525S415000, C528S357000

Reexamination Certificate

active

07026496

ABSTRACT:
The present invention relates to a complex having the formula (I) wherein M is selected from Sn(II), Sn(IV), Al(III) and Mg(II); each of R1and R2is independently hydrocarbyl; R3is H or hydrocarbyl; and X is a linker group. A further aspect of the invention relates to the use of said complex as a polymerisation initiator, particularly in the polymerisation of lactides.

REFERENCES:
patent: 40 28 764 (1992-03-01), None
Duda, Andrzej et al., “Kinetics of epsilon.-caprolactane polymerization on dialkylaluminum alkoxides”, Makromol. Chem. Macromol. Symp. 47, 127-140 (1991).
Chang, et al., “Sterically Hindered Aluminum—Magnesium Bridged Complex: {Me2Al[μ-N(1C3H7)2]2Mg-[O-2,6-(1C4H9)2-4-MeC6H2]}”, Inorg. Chem. 1995, vol. 34, No. 17, pp. 4296-4298.

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