Mineral fiber product

A mineral fiber product, wherein the product comprises mineral fibers in contact with a binder resulting from a curing of an aqueous binder composition which is free of phenol and formaldehyde and comprises:

• a component (i) in the form of one or more lignosulfonate lignins having a carboxylic acid group content of from 0.03 mmol/g to 1.4 mmol/g and a content of phenolic OH groups of from 0.3 mmol/g to 2.5 mmol/g, both based on a dry weight of lignosulfonate lignins,
• a component (ii) in the form of one or more cross-linkers,
• with the proviso that the aqueous binder composition does not comprise a cross-linker selected from
• epoxy compounds having a molecular weight MW of 500 or less;
• carbonyl compounds selected from aldehydes, carbonyl compounds of the formula R—[C(O)R1]x
• in which:
• R represents a saturated or unsaturated and linear, branched or cyclic hydrocarbon radical, a radical including one or more aromatic nuclei which consist of 5 or 6 carbon atoms, a radical including one or more aromatic heterocycles containing 4 or 5 carbon atoms and an oxygen, nitrogen or sulfur atom, it being possible for the R radical to contain other functional groups,
• R1 represents a hydrogen atom or a C1-C10 alkyl radical, and
• x varies from 1 to 10,
• and polyamines.