BINDER FOR MINERAL FIBRES, COMPRISING LIGNOSULFONATE AND A CARBONYL COMPOUND, AND RESULTING MATS

摘要

The invention relates to an aqueous binder for mineral fibres, in particular glass fibres, said binder comprising: at least one ammonium lignosulfonate or an alkali metal or alkaline earth metal salt of lignosulfonic acid; and at least one carbonyl compound of formula R - [C(O)R1]x (I), wherein: - R represents a saturated or unsaturated, linear, branched or cyclic hydrocarbon radical, a radical containing one or more aromatic nuclei of 5 or 6 carbon atoms, a radical containing one or more aromatic heterocycles containing 4 or 5 carbon atoms and an oxygen, nitrogen or sulphur atom, whereby radical R can contain other functional groups, such as hydroxyl or alkoxy, in particular methoxy; - R1 represents a hydrogen atom or a C1-C10 alkyl radical; and - x varies between 1 and 10, said binder being free of hydrogenated sugar and melamine. The invention also relates to fibrous products taking the form of mats of mineral fibres.