Verfahren zur Herstellung hochmolekularer,thermoplastischer Kieselsaeurepolyester

摘要

1,183,989. Organosilicon polymers. DYNAMIT NOBEL A.G. 14 Sept., 1967 [14 Sept., 1966], No. 42044/67. Heading C3T. Silicic acid polyesters of formula in which R1 and R2 are hydrogen, alkyl or alkenyl radicals, R3 is an arylene radical; R4 represents the residue obtained by removing the OH groups from a diol, dihydric phenol, bis-phenol or a hetero-organic compound containing two hydroxyl groups, m is an integer from 1 to 100 and n an integer of I to 200 are prepared by reacting a silicic acid ester silazane (or silylamine) of general formula in which R1, R2, R3 and m have the meanings ascribed above, R5 is H or an alkyl, cycloalkyl or aryl radical and p is an integer of 1 to 200 with a dihydroxy compound R4(OH) 2 in substantially equimolar quantities at 20-440‹ C.