Method for making alkoxy-siloxane polyether carboxylates...

Details Method for making alkoxy-siloxane polyether carboxylates... Method for making alkoxy-siloxane polyether carboxylates...

2007-02-21

2009-12-01

Gulakowski, Randy (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

C528S026000

Reexamination Certificate

active

07625991

ABSTRACT:
A resin that may be used, for example, in dental impression materials, and a method of making the resin. The resin comprises an alkoxy-siloxane polyester or polyether carboxylate backbone functionalized with at least two cycloolefin groups capable of undergoing a metathesis reaction. The method of making the resin comprises reacting a hydride terminated siloxane with a polyether or polyester diol containing propylene oxide and ethylene oxide fragments, and a cycloolefinic group functionalized hydroxyalkyl carboxylic acid ester, in the presence of a Group 3 or 13 catalyst.

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European Patent Office; Search Report and Written Opinion received in corresponding EP Patent Application No. 072507312; dated Sep. 18, 2007; 6 pgs.

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