o about 52 carbon atoms per mole cule and from about 48 to about 51 % of their total weight in the portion of each molecule that has the chemical formula (CH2CH2O)n, where n is a positive integer, the ratio of the amount of component (A.1.A) to the amount of component (A 1 B) being from about 1.0: 1.9 to about 1.0:2.1 ; and (A.1.C) an inorganic boron containing component selected from the group co