Surface treated silicas

Details Surface treated silicas Surface treated silicas

2007-08-28

2007-08-28

Feely, Michael J. (Department: 1712)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C427S214000, C427S402000, C428S402000, C428S403000, C428S405000, C428S447000, C523S400000, C524S492000

Reexamination Certificate

active

11023933

ABSTRACT:
Disclosed is a silica substrate treated with a polysiloxane, and an organosilane, wherein the organosilane is described by the formula: RSi(R′)x(OR″)3-x; wherein R is a long-chain hydrocarbon group having between about 8 to about 30 carbon atoms, which may also contain organofunctional groups such as vinyl, methacryl, amino, sulfur, and epoxy groups; R′ and R″ are independently selected from a methyl and ethyl group; and X is either 0 or 1. The optimal use for the treated silica substrate is as a rheology modifier in epoxy polymer materials, however, the silica substrate could also be used in other chemical compositions such as polyurethanes, polyesters, silicones, and hydrocarbon oils.

REFERENCES:
patent: 6344240 (2002-02-01), Menon et al.
patent: 7008982 (2006-03-01), Isarov et al.
patent: 7109256 (2006-09-01), Amano et al.
patent: 2003/0027896 (2003-02-01), Amano et al.

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