Polyoxyalkylene polymers as lubricants particularly in molding processes

Claim 1

A composition of matter comprising: a polyoxyethylene-polyoxypropylene copolymer which is a cogeneric mixture of compounds represented by the formula: HO(C.sub.2 H.sub.4 O).sub.m (C.sub.3 H.sub.6 O).sub.n (C.sub.2 H.sub.4 O).sub.m H wherein n is an integer; the value of which is such that the molecular weight of the oxypropylene groups is from about 2500 to 4000; and the value of m is such that the oxyethylene groups constitute about 20 to 80 percent by weight of the compound and a copolymer which is a cogeneric mixture of compounds represented by the formula: R--O(A)H wherein R is an essentially linear alkyl group having from 10 to 18 carbon atoms, with the proviso that at least 70 weight percent of said compounds in said mixture have an R of from 12 to 16 carbon atoms and A is a random mixture represented by the latter formula of oxypropylene and oxyethylene groups, said oxypropylene and oxyethylene groups being from 55 percent to 80 percent of the total weight of the compounds, the oxypropylene to oxyethylene ratio being from about 0.85:1 to 2.75:1.