Patent ID: 8017056

Claim:
A process for the production of hollow plastic moldings by positioning a water-soluble salt core in a mold, molding a thermoplastic molding material around the salt core and, after solidification of the thermoplastic molding material, washing out substantially the entire salt core with a water-containing solvent, wherein the salt core is not heated to a molten state before being removed from the solidified thermoplastic molding material by washing with the water-containing solvent, and wherein the water-soluble salt core comprises in addition to water-soluble salt 0.2 to 20% weight, based on the total salt core, of organic and/or inorganic binders, and wherein the water-soluble salt is selected from the group consisting of sodium chloride, potassium chloride, potassium nitrate, potassium nitrite, sodium nitrate, sodium nitrite, copper chloride, lithium chloride, lead chloride, magnesium chloride, barium chloride, calcium chloride and mixtures thereof.