Invention Grant
- Patent Title: Process for improving hiding efficiency in pigment paints
- Patent Title (中): 提高颜料涂料遮盖效率的方法
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Application No.: US13649611Application Date: 2012-10-11
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Publication No.: US08546467B2Publication Date: 2013-10-01
- Inventor: James Bohling , Wei Gao , Qing Zhang
- Applicant: Rohm and Haas Company
- Applicant Address: US PA Philadelphia
- Assignee: Rohm and Haas Company
- Current Assignee: Rohm and Haas Company
- Current Assignee Address: US PA Philadelphia
- Agent Reid S. Willis
- Main IPC: C08K3/22
- IPC: C08K3/22 ; C09B67/00

Abstract:
The present invention relates to a process comprising the steps of a) contacting an aqueous dispersion of a TiO2 slurry containing adsorbing dispersant with an adsorbing latex to form a mixture, wherein the pH of the mixture of the TiO2 slurry and adsorbing latex are sufficiently high to inhibit interaction between the TiO2 and the adsorbing dispersant; then b) lowering the pH of the mixture of step a) sufficiently to promote interaction between the TiO2 and the adsorbing latex, thereby forming a composite; wherein the adsorbing latex comprises structural units of itaconic acid or a salt thereof. The process of the present invention provides for improved hiding and reduced grit for coatings compositions.
Public/Granted literature
- US20130096250A1 PROCESS FOR IMPROVING HIDING EFFICIENCY IN PIGMENT PAINTS Public/Granted day:2013-04-18
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