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:
Mar. 20, 2012
Filed:
Jul. 23, 2007
Photocatalyst-containing water-based curable coating compositions and process for production thereof
Hiroshi Matsuzawa, Takaishi, JP;
Hiroyuki Hidaka, Takaishi, JP;
Tokio Goto, Takaishi, JP;
DIC Corporation, Tokyo, JP;
Abstract
The present invention provides a photocatalyst-containing water-based curable coating composition capable of forming a cured coating film having an excellent durability against the oxidative decomposition effect caused by the photocatalyst, and an excellent crack resistance, as well as excellent weather resistance and stain resistance; and a method for producing the coating composition. Specifically, the present invention provides a photocatalyst-containing water-based curable coating composition comprising: one of a water-based dispersion (X1) or a water-based dispersion (X2), which includes a water-based medium, a polymer segment (A) having a neutralized acid group, a polysiloxane segment (B) forming a composite resin (AB) by chemically bonding with the polymer segment (A), a polysiloxane segment (C) derived from an alkyltrialkoxysilane condensate (c) with an alkyl group of 1 to 3 carbon atoms, the polysiloxane segment (C) forming a composite resin (ABC) by coupling with the polymer segment (A) and the polysiloxane segment (B) via silicon-oxygen bonds, and fine particles of a photocatalytic oxide (D), wherein the water-based dispersion (X1) is formed by dispersing or dissolving the composite resin (ABC) and dispersing the fine particles of a photocatalytic oxide (D) in the water-based medium, the water-based dispersion (X2) is formed by dispersing resin particles in a water-based medium, the resin particles formed by the encapsulation of the fine particles of a photocatalytic oxide (D) within the composite resin (ABC); and a curing agent (E) for curing the composite resin (ABC), and a method for producing the coating composition.