Catalyzed Polymerization of Cyclic Esters and Cyclic Carbonates
申请人:Université de Mons
公开号:EP2868683A1
公开(公告)日:2015-05-06
The present invention relates to a process for the preparation of polyesters or polycarbonates comprising (i) the provision of cyclic esters or cyclic carbonates, (ii) polymerizing by ring-opening in the presence of a betaine based metal-free catalyst showing formula
-X-R1-Y+(R2)3
wherein X is S, O or Se,
Y is N or P,
R1 is linear or cyclic alkyl or aryl, and
R2 is linear or cyclic alkyl.
and under polymerizing conditions in the presence of an alcohol or amine based initiator.
本发明涉及一种制备聚酯或聚碳酸酯的工艺,包括:(i) 提供环状酯或环状碳酸酯,(ii) 在甜菜碱基无金属催化剂存在下通过开环法聚合,该催化剂的化学式为
-X-R1-Y+(R2)3
其中 X 是 S、O 或 Se、
Y 是 N 或 P
R1 是直链或环状烷基或芳基,以及
R2 是直链或环状烷基。
以及在醇或胺类引发剂存在下的聚合条件下。
CATALYZED POLYMERIZATION OF CYCLIC ESTERS AND CYCLIC CARBONATES
申请人:Dubois Philippe Ghilain
公开号:US20150126703A1
公开(公告)日:2015-05-07
A process for the preparation of polyesters or polycarbonates including (i) the provision of cyclic esters or cyclic carbonates, (ii) polymerizing by ring-opening in the presence of a betaine based metal-free catalyst showing formula
−
X—R
1
—Y
+
(R
2
)
3
wherein X is S, O or Se,
Y is N or P,
R
1
is linear or cyclic alkyl or aryl, and
R
2
is linear or cyclic alkyl.
and under polymerizing conditions in the presence of an alcohol or amine based initiator.
Bifunctional Organocatalyst for Activation of Carbon Dioxide and Epoxide To Produce Cyclic Carbonate: Betaine as a New Catalytic Motif
Bifunctionalorganocatalysts bearing an ammonium betaine framework have been developed as a new catalytic motif for the activation of carbondioxide and epoxides to produce cyclic carbonates.