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:
Dec. 13, 2016
Filed:
Jul. 05, 2011
James C. Bohling, Lansdale, PA (US);
Deborah G. Fradkin, Harleysville, PA (US);
Wei Gao, Fort Washington, PA (US);
John W. Hook, Iii, Warminster, PA (US);
Tao Wang, Highton, AU;
Tao Wang, Shanghai, CN;
James C. Bohling, Lansdale, PA (US);
Deborah G. Fradkin, Harleysville, PA (US);
Wei Gao, Fort Washington, PA (US);
John W. Hook, III, Warminster, PA (US);
Tao Wang, Highton, AU;
Tao Wang, Shanghai, CN;
Rohm and Haas Company, Philadelphia, PA (US);
Abstract
The present invention relates to a process comprising the steps of a) contacting an aqueous dispersion of a TiOslurry containing adsorbing dispersant with an adsorbing latex to form a mixture, wherein the pH of the mixture of the TiOslurry and adsorbing latex are sufficiently high to inhibit interaction between the TiOand the adsorbing latex; then b) lowering the pH of the mixture of step a) sufficiently to promote interaction between the TiOand the adsorbing latex, thereby forming a composite. The process of the present invention provides for improved hiding and reduced grit for coatings compositions.