Garnet-containing stabilizer mixtures for polymers

US5569694A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Peter Kuhm · Hilden, DE
• Frido Loeffelholz · Bremerhaven, DE
• Peter Wedel · Worms, DE
• Bernd Wegemund · Haan, DE

Key dates

• Filing date: Jun 16, 1995
• Grant date: Oct 29, 1996
• Expiry date: Jun 16, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/098
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Stabilizer mixture for polymers based on halogen-containing vinyl monomers are provided. The stabilizers contain: PA1 a) calcium soaps of C.sub.8-32 fatty acids, PA1 b) zinc soaps of C.sub.8-32 fatty acids, and PA1 c) garnets corresponding to formula (I): ##EQU1## in which M.sup.I is at least one alkali metal ion PA2 M.sup.II is at least one divalent metal ion PA2 M.sup.III is at least one trivalent metal ion PA2 M.sup.IV represents titanium and/or zirconium ions PA2 A.sup.n is at least one n-valent acid anion with the charge n=1, 2, 3 or 4 and the following conditions apply: PA3 0.ltoreq.x<1, 0.ltoreq.y<1, 0.ltoreq.z<12, 0<m, where y<z and n.multidot.m+z=12, wherein said garnets are optionally surface-modified. Such garnets are characterized by a specific crystal lattice which distinguishes them from other alkaline earth metal aluminates, such as the hydrotalcites.