Method for binding non-solid oxidic inorganic materials with etherified aminoplast resins and cured compositions of said materials and etherified aminoplast resins

A process for binding non-consolidated oxidic inorganic materials selected from the group consisting of

• materials which comprise particles of oxidic inorganic materials, and
• oxidic inorganic materials which have pores, cracks, fractures or fissures, by contacting the inorganic materials with a curable composition comprising at least one curable, etherified amino resin, followed by thermal curing of the resin, wherein the etherified amino resin is an etherified urea-formaldehyde resin which comprises structural units of the general formula (II) or (I) and (II)
• where
• the R1, R2, R3 and R4 radicals are each substituents selected from the group of H, —CH2—OH and —CH2—OR′,
• R′ is an aliphatic hydrocarbyl radical having 1 to 10 carbon atoms,
• x is from 2 to 8, and
• y is from 1 to 20
• with the proviso that at least one of the R1, R2, R3 and R4 radicals is a —CH2—OR′ radical, and where the amount of the curable composition is 0.5 to 60% by weight based on the inorganic materials, and the curing is undertaken at a temperature from greater than 0° C. to 280° C.