Wax dispersions and their use in the manufacture of sheets or moulded bodies

Claim 1

A disperable organic polyisocyanate composition comprising, on a weight basis, from 99 to 60 parts of an emulsifiable liquid organic polyisocyanate and from 1 to 40 parts of a mixture of (a) a wax selected from the group consisting of a vegetable wax having a melting point of at least 70° C., a modified vegetable oil having a melting point of at least 70° C., a microcrystalline wax having a melting point of at least 70° C., an animal wax having a melting point of at least 60° C., a synthetic wax having a melting point of at least 60° C., a modified animal wax having a melting point of at least 60° C. and mixtures thereof and (b) a liquid ester having a molecular weight of at least 250 derived from a monohydric alkyl alcohol containing from 3 to 30 carbon atoms and a saturated or unsaturated monocarboxylic fatty acid containing from 10 to 25 carbon atoms, wherein the wax and the liquid ester are present in the proportions of from 90:10 to 10:90, the composition having mold release properties when used in the form of an aqueous dispersion as binder in the manufacture of sheets or molded bodies by the hot pressing of lignocellulosic material.