Emulsions of organopolysiloxane resins produced by emulsion...

Details Emulsions of organopolysiloxane resins produced by emulsion... Emulsions of organopolysiloxane resins produced by emulsion...

2011-01-25

2011-01-25

Peng, Kuo-Liang (Department: 1765)

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C516S055000

Reexamination Certificate

active

07875673

ABSTRACT:
An aqueous siloxane resin containing emulsion is prepared by: (i) adding water, at least one nonionic surfactant, optionally adding an ionic surfactant, and a catalyst, to a reaction vessel, and heating the contents of the vessel to form a mixture; (ii) adding to the mixture at least one silane monomer of the formula RSi(OR′)3; (iii) optionally, adding to the mixture, silane monomers of the formula R2Si(OR′)2or R3SiOR′; (iv) allowing the silane monomer to hydrolyze and condense by a polymerization reaction in the catalyzed aqueous mixture; (v) terminating the reaction by neutralizing the mixture; and (vi) recovering from the mixture a siloxane resin emulsion containing a siloxane resin.

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