Aqueous dispersions for producing flame-retardant foamed films and for producing composite structures equipped therewith

Abstract

An aqueous polymer dispersion including a dispersed polymer, a foam stabilizer and a flame retardant mixture containing melamine cyanurate and an aluminum phosphinate. The combination of flame retardants makes it possible to form homogeneous foams formed with air which may be used to produce thick solidified foam layers for imparting a pleasant haptic impression without any need to include halogen-containing flame retardants. The solidified foams thus produced also feature improved thickness stability upon exposure to elevated temperatures. Also provided are laminate structures including two or more layers, at least one layer of which is obtainable by solidifying the aqueous polymer dispersion, and to the use of a flame retardant combination containing melamine cyanurate and an aluminum phosphinate for reducing the thickness shrinkage of a solidified foam layer formed from the polymer dispersion according to the invention.

Dependencies are inferred from the claim text.