Patent ID: 8512618

Claim:
A process for production of a molding: the molding comprising: a renewable raw material comprising at least one of a particulate substrate and a fibrous substrate and a formaldehyde-free, aqueous binder, wherein the binder comprises: a) a polymer A having from 5 to 100% by weight of an ethylenically unsaturated carboxylic anhydride or of an ethylenically unsaturated dicarboxylic acid whose carboxyl groups are capable of forming an anhydride group, incorporated as polymerized units, and b) an alkanolamine B which has at least 2 hydroxyl groups, wherein the process comprises: applying from 0.01 to 5% by weight of an organic polyamine compound C, based on the total amount of the renewable raw material, to the renewable raw material to obtain a mixture; impregnating the mixture with the formaldehyde-free, aqueous binder, shaping the impregnated mixture to a molding and subjecting the molding to a thermal treatment, wherein a weight average molecular weight Mw of the organic polyamine compound C is greater than or equal to 1000 g/mol and the organic polyamine compound C comprises at least a total of 5 primary and secondary amino functions.