Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From heterocyclic reactant containing as ring atoms oxygen,...
Reexamination Certificate
2005-01-26
2008-09-09
Sellers, Robert (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From heterocyclic reactant containing as ring atoms oxygen,...
C525S403000, C525S409000, C528S421000
Reexamination Certificate
active
07423111
ABSTRACT:
The problem is to efficiently produce an active hydrogen group-containing oxyalkylene polymer as a starting material of a hydrolyzable silicon group-containing oxyalkylene polymer which has a low viscosity while maintaining a plasticity of a cured product and which does not contaminate an area around a sealing portion and/or has no adverse effect on an adhesion. The problem is dissolved by a process for producing an oxyalkylene polymer in which a first oxyalkylene polymer having at least two active hydrogen groups and a second oxyalkylene polymer having one active hydrogen group coexist, which process comprises reacting an alkylene oxide using a first initiator having at least two active hydrogen groups and a second initiator having one active hydrogen group in the presence of a catalyst.
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Iwakiri Hiroshi
Odaka Hidetoshi
Brinks Hofer Gilson & Lione
Kaneka Corporation
Sellers Robert
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