Invention Grant
- Patent Title: Titanium dioxide pigment and method for manufacturing same, and composition in which same is blended
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Application No.: US15319307Application Date: 2015-06-12
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Publication No.: US10087329B2Publication Date: 2018-10-02
- Inventor: Kaoru Isobe , Norihiko Sanefuji , Yasutsune Tanida , Kensuke Ohsaki
- Applicant: Ishihara Sangyo Kaisha, Ltd.
- Applicant Address: JP Osaka
- Assignee: ISHIHARA SANGYO KAISHA, LTD
- Current Assignee: ISHIHARA SANGYO KAISHA, LTD
- Current Assignee Address: JP Osaka
- Agency: Manelli Selter PLLC
- Agent Jeffrey S. Melcher
- Priority: JP2014-123931 20140617
- International Application: PCT/JP2015/066967 WO 20150612
- International Announcement: WO2015/194466 WO 20151223
- Main IPC: C09C1/36
- IPC: C09C1/36 ; C09C3/06 ; C08K3/22 ; C08K9/02 ; C08K9/06 ; C08K9/08 ; C09C3/08 ; C09C3/12

Abstract:
Provided is a titanium dioxide pigment having minimal yellow color and minimal yellowing due to exposure, i.e., good yellowing resistance and high pigment performance such as brightness. Also provided is a titanium dioxide pigment which has a reduced amount of volatile moisture and which does not readily decompose when blended with a resin or the like. In the present invention, a compound including 0.05-20% by mass of phosphorus and an alkaline earth metal is present on surfaces of titanium dioxide particles having an average particle diameter of 0.15-1.0 μm. The titanium dioxide pigment is manufactured by mixing an alkaline earth metal compound, a phosphate compound, and titanium dioxide particles having an average particle diameter of 0.15-1.0 μm, and bonding the compound including phosphorus and an alkaline earth metal to the titanium dioxide particles.
Public/Granted literature
- US20170130055A1 TITANIUM DIOXIDE PIGMENT AND METHOD FOR MANUFACTURING SAME, AND COMPOSITION IN WHICH SAME IS BLENDED Public/Granted day:2017-05-11
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