Storage stable multicomponent mixtures useful in making aminoplasts, phenoplasts, and polyurethanes

A process for the production of low viscosity storable multicomponent mixtures comprising mixing the following components at from 10.degree. to 80.degree. C.:

• (a) at least one lactam compound,
• (b) at least one acid group-free material, selected from the group consisting of:
• i. water,
• ii. difunctional organic compounds containing functional groups selected from the group consisting of hydroxyl, primary amino, secondary amino and sulfhydryl, and
• iii. mixtures thereof;
• (c) at least one organic or inorganic acid selected from the group consisting of:
• i. mono or polycarboxylic acid,
• ii. organic and inorganic acids of phosphorous,
• iii. inorganic acids of boron, and
• iv. partially hydrolyzed antimonous and antimonic acid esters of polyhydroxyl compounds with molecular weights of from 62 to 600,
• wherein from 0.5 to 8 mols of component (b) and from 0.5 to 10 mols of component (c) are present per mol of component (a).