Cationic laminar compounds and their production and use as stabilizers for halogen containing plastics

US6166124A · kind A · utility

Assignee

• Cognis Deutschland GmbH · DE

Inventors

• Ilona Lange · Langenfeld, DE
• Joerg-Dieter Klamann · Bremerhaven, DE
• Juergen Foell · Goldkronach, DE
• Peter Wedl · Loxstedt, DE
• Dieter Marks · Loxstedt, DE

Key dates

• Filing date: Feb 4, 1999
• Grant date: Dec 26, 2000
• Expiry date: Feb 4, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2002/22
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process for the production of cationic layer compounds wherein layer compounds corresponding to general formula (I): EQU --[E.sub.e Z.sub.z D.sub.d V.sub.v (OH.sup.-).sub.x ](A.sup.n-).sub.a.qH.sub.2 O-- (I) in which PA1 E is a monovalent cation from the group consisting of alkali metals, PA1 e is a number of 0 to 2, PA1 Z is a divalent metal cation, PA1 z is a number of 0 to 6, PA1 D is a trivalent metal cation, PA1 d is a number of 0 to 3, PA1 V is a tetravalent metal cation, PA1 v is a number of 0 to 1, PA1 (A.sup.n-) is an acid anion having the charge n- where n is an integer of 1 to 3, PA1 q is a number of 1 to 10, with the proviso that x>a and e+2z+3d+4v=x+na, are subjected to alkali-induced ripening in aqueous medium wherein the alkali metal hydroxide content of said aqueous medium is adjusted to a value in the 1- to 6-molar range, the crystallization temperature is adjusted to a value in the range from 60.degree. C. to 100.degree. C., and the crystallization time is adjusted to a value in the range from 2.5 to 50 hours.