The product is a colorless to white mass which is readily soluble in alcohol and acetone, but insoluble in alkalies. (24) 100 parts of styrene, parts of maleic anhydride and 60 parts of glycerine are heated in an autoclave for 8 hours at 120 C. There is obtained a hard white mass which is insoluble in sodium carbonate solution and in organic solvents, such as benzene, alcohol, dioxane, acetone or