The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 1981
Filed:
Jun. 07, 1979
Applicant:
Inventors:
Roger A Crawford, Wadsworth, OH (US);
Hubert J Golden, Wadsworth, OH (US);
Assignee:
PPG Industries, Inc., Pittsburgh, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C09C / ; C08K / ;
U.S. Cl.
CPC ...
1063 / ; 1062 / ; 10628713 ; 10628714 ; 10628734 ; 106195 ; 260 4215 ; 556467 ;
Abstract
Finely divided silica is used as a flattening agent to reduce gloss in lacquers and varnishes, but untreated silica tends to settle out of certain lacquers and varnishes to form a hard layer that is resistant to redispersion. Treatment of the silica with a reactive organopolysiloxane such as methyl hydrogen polysiloxane reduces the tendency of the silica to settle and renders it more easily redispersible. The treated silica may be incorporated into known lacquers, varnishes, and other coating compositions.