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. 07, 2009
Filed:
Jul. 25, 2005
Applicant:
Gerald D. Treadway, Penngrove, CA (US);
Inventor:
Gerald D. Treadway, Penngrove, CA (US);
Assignee:
The Walman Optical Company, Minneapolis, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 2/46 (2006.01); C07D 303/02 (2006.01); C08K 5/5435 (2006.01); C08K 5/54 (2006.01); C08K 5/541 (2006.01);
U.S. Cl.
CPC ...
Abstract
Coating compositions yielding cured coatings that exhibit excellent abrasion-resistance and hardness for use on polymeric substrates such as the front side of optical lenses, in a manner that meets or exceeds the stringent requirements for such use. The compositions include the hydrolysis product of an epoxy functional alkoxy silane, a viscosity-reducing amount up to 50% by weight, solids basis, of a monomeric (silanol free) epoxy functional epoxy silane, and colloidal silica present in an amount sufficient to improve abrasion resistance as compared to a composition lacking the colloidal silica.