07-01-2016 дата публикации
Номер: US20160002056A1
This invention relates to synthetically derived zinc hectorite platelets, of superior platelet diameter, effect pigments comprising such synthetically derived platelets and methods of forming said substrates. More specifically the disclosure describes an improved hydrothermal synthesis of zinc hectorite suitable as a platelet for interference pigments, barrier and flame retardant applications. 1. A synthetic zinc hectorite platelet of formula (1){'br': None, 'sub': x', '3-x', 'x', '4', '10', '2, 'I(Zn,Li)SiO(X)\u2003\u2003(1)'}wherein{'sup': +', '+', '+', '4+, 'I is an interlayer monovalent cation selected from the group consisting of K, Na, Li, NH and mixtures thereof;'}andX is independently fluoride or hydroxide;subscript x is a number ranging from >0 to 1 and including 1;and Zn and Li are greater than 0;and the synthetic zinc hectorite platelet is characterized by a diameter of =>2 microns.2. The platelet according to claim 1 , wherein the compound of formula (1) is selected from the group consisting of:{'sub': x', '3-x', 'x', '4', '10', '2', 'x', '3-x', 'x', '4', '10', '2', 'x', '3-x', 'x', '4', '10', '2', '4', 'x', '3-x', 'x', '4', '10', '2', 'x', '3-x', 'x', '4', '10', '2', 'x', '3-x', 'x', '4', '10', '2', 'x', '3-x', 'x', '4', '10', '2', '4', 'x', '3-x', 'x', '4', '10', '2', 'x', '3-x', 'x', '4', '10', 'x', '3-x', 'x', '4', '10', 'x', '3-x', 'x', '4', '10', '4', 'x', '3-x', 'x', '4', '10', 'x', '3-x', 'x', '4', '10', '2', 'x', '3-x', 'x', '4', '10', '2', 'x', '3-x', 'x', '4', '10', 'x', '3-x', 'x', '4', '10', '2', 'x', '3-x', 'x', '4', '10', '2', 'x', '3-x', 'x', '4', '10', 'x', '3-x', 'x', '4', '10', '2', 'x', '3-x', 'x', '4', '10', '2', 'x', '3-x', 'x', '4', '10', '4', 'x', '3-x', 'x', '4', '10', '2', '4', 'x', '3-x', 'x', '4', '10', '2', '4', 'x', '3-x', 'x', '4', '10, 'Li(ZnLi)SiO(OH), Na(ZnLi)SiO(OH), K(ZnLi)SiO(OH), (NH)(ZnLi)SiO(OH), Li(ZnLi)SiO(F), Na(ZnLi)SiO(F), K(ZnLi)SiO(F), (NH)(ZnLi)SiO(F), Li(ZnLi)SiO(F,OH), Na(ZnLi)SiO(F,OH),K(ZnLi)SiO(F,OH), ...
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