Flame-retardant mineral fillers and flame-retardant polymer compositions

US9365696B2 · kind B2 · utility

Assignee

• S.A. Lhoist Recherche et Développement · BE

Inventors

• Marion Lorgouilloux · La Louvière, BE
• Didier Lesueur · Madrid, ES
• Thierry Chopin · Saint-Leu, FR
• Fouad Laoutid · Thonon-les-Bains, FR
• Philippe Dubois · Braives, BE

Key dates

• Filing date: Jul 12, 2013
• Grant date: Jun 14, 2016
• Expiry date: Jul 12, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K2003/265
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A powdery mineral filler comprising a calcium compound and a magnesium compound, comprising a semi-hydrated dolomite of general formula aCaCO3.bCa(OH)2.cMg(OH)2.dMg0.eCaO, a, b, c, d and e being molar fractions with (a+b+e)/(c+d) between 0.8 and 1.2, and comprising particle agglomerates, a flame-retardant polymer composition containing same, production methods and use of such mineral fillers.