Process for producing moulded expanded urea formaldehyde products

Process for producing moulded expanded urea formaldehyde products, which comprises the steps of (a) incorporating in a urea formaldehyde resin solution a catalyst which causes gelling and curing of the resin solution, (b) depositing said mixture into an open top mould and permitting said mixture to gel, (c) partially drying and curing the resulting gel at a temperature between ambient temperature and about 70.degree. C. to produce a preform, (d) transferring said preform into a second mould having dimensions at least slightly greater than said open top mould and (e) closing said second mould and heat-treating said preform at a temperature above about 120.degree. C. to further cure and expand said preform in said closed second mould.