Surface-modified precipitated silicas

Details Surface-modified precipitated silicas Surface-modified precipitated silicas

2004-05-13

2009-06-30

Cain, Edward J (Department: 1796)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C523S216000, C524S492000, C524S493000

Reexamination Certificate

active

07553889

ABSTRACT:
A surface-modified precipitated silica, useful as a matting agent, contains the silica having a polymer on a surface thereof. The surface-modified precipitated silica improves the transmission of a clear coating material, having a refractive index of nD20=1.4492 and containing 5% by weight of said silica, by at least 20%, in comparison to the same clear coating material containing 5% by weight of a reference precipitated silica surface treated with a polyethylene wax.

REFERENCES:
patent: 6899951 (2005-05-01), Panz et al.
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patent: 1 281 733 (2003-02-01), None

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