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:
Oct. 16, 2012
Filed:
Jul. 24, 2007
Jung Min Lee, Daejeon, KR;
Jeong Kwon Suh, Daejeon, KR;
Byung Ki Park, Daejeon, KR;
Dong Uk Choe, Daejeon, KR;
Gil Wan Chang, Cheongju-si, KR;
Kwang Su Lim, Cheongju-si, KR;
Sung Yun JO, Chungcheongbuk-do, KR;
Kwang Choong Kang, Cheongju-si, KR;
Jung Min Lee, Daejeon, KR;
Jeong Kwon Suh, Daejeon, KR;
Byung Ki Park, Daejeon, KR;
Dong Uk Choe, Daejeon, KR;
Gil Wan Chang, Cheongju-si, KR;
Kwang Su Lim, Cheongju-si, KR;
Sung Yun Jo, Chungcheongbuk-do, KR;
Kwang Choong Kang, Cheongju-si, KR;
Korea Research Institute of Chemical Technology, Daejeon, KR;
CQV Co., Ltd., Chungcheongbuk-Do, KR;
Abstract
The present invention relates to a pearlescent pigment with large aspect ratio and a method of their preparation, and particularly to pearlescent pigments prepared by coating a metal or metal precursor on the flaky alpha-alumina crystals obtained by using an aluminum precursor aqueous solution and a zinc precursor aqueous solution as main ingredients. The crystals herein has an average particle thickness of 0.5 μm or less, an average particle diameter of 15 μm or higher and a large aspect ratio of 50 or higher, thereby being superior in gloss. The crystals show metal colors and interference colors of silver, gold, red, purple, blue and green.