A method of preparing heat resistant coatings is given which is characterized by the fact that elemento-organic oligomers are used with functional groups for example tris-alpha, omega-hydroxymethylsiloxy-phenylsiloxane. A mixture consisting of an elemento-organic compound is prepared containing a greater amount of chemically active groups in the form of hydroxyl, alkoxyl etc., an inorganic glass boronlead, phosphate and other glass and hydroxyl compounds of such elements, as boron, phosphorus etc. When heated, the functional groups of the polymers and glass react with each other forming block and acclimatized polymers with melting points of more than 500C.
Unedited rough draft trans. of Russian patent 148 181 (appl. 736544/23-4, 29 Jun 61).