Metalloxidacylate und Verfahren zu deren Herstellung

摘要

1,274,718. Metal oxide acylates. J. RINSE. 1 July, 1969 [2 July, 1968; 11 Oct., 1968], No. 33109/69. Heading C2C. [Also in Divisions C3 and C4] Metal oxide acylates are prepared by reaction of (a) at least one metal component selected from polyvalent metals and oxides, hydroxides and carbonates thereof, with (b) at least one volatile monocarboxylic acid having from 1 to 5 carbon atoms and (c) at least one monocarboxylic acid having at least 7 carbon atoms (preferably the molar ratio of metal to monocarboxylic acid having at least 7 carbon atoms is at least 1:1) to produce a metal oxide acylate, wherein at least one valency of each metal atom derived from the metal component is satisfied by an acylate group and each of the remaining valencies is satisfied either by an oxygen atom which is attached to another metal atom or by an acylate group, which process includes distilling the product at a temperature of from 100‹ to 250‹ C., and during the distillation adding a liberating agent for the volatile monocarboxylic acid whereby to liberate said volatile acid and obtain a metal oxide acylate wherein at least 55 mole per cent of the acylate content is of monocarboxylic acid having at least 7 carbon atoms, the liberating agent being selected from one or more of water, steam, a volatile alcohol, an aluminium alkoxide wherein each alkoxide group has at most four carbon atoms, a titanium alcoholate, wherein each alcoholate group has at most four carbon atoms, and a condensed titanium silicon alkoxide, wherein each alkoxide group has at most four carbon atoms, the amount of aluminium alkoxide, titanium alcoholate or condensed titanium silicon alkoxide used being not greater than 10% by weight of the metal oxide acylate product. In the above process, reactants (a) and (b) may be replaced by at least one salt of a polyvalent metal and a volatile monocarboxylic acid having from 1 to 5 carbon atoms. Novel compositions comprise a metal oxide acylate having at least two metal atoms other than aluminium bound to each other through an oxygen bridge and in which each metal atom has a valence number of at least two and is bound only to oxygen atoms and at least 55 mol. per cent of the acylate content is derived from monocarboxylic acid having at least 7 carbon atoms, the remainder of the acylate if any being derived from monocarboxylic acid having less than 7 carbon atoms, the molar ratio of metal to acylate in the composition being in excess of 1:1, and the excess metal being in a finely divided, stable, dispersed state as metal oxide are prepared by the above process if excess metal oxide (a) is used. Novel liquid (metal oxide acylate)/(metal alkoxide) reaction products, the metal oxide acylate having at least two metal atoms other than aluminium bound to each other through an oxygen bridge and in which each metal atom has a valence number of at least two and is bound only to oxygen atoms and at least 55 mol. per cent of the acylate content is derived from monocarboxylic acid having at least 7 carbon atoms, the remainder of the acylate if any being derived from monocarboxylic acid having less than 7 carbon atoms, the metal alkoxide comprising at most 10% by weight based on the weight of said metal oxide acylate and being selected from the group consisting of aluminium alcoholate, titanium alcoholate and condensed titanium silicon alkoxide are prepared by the above process when the liberating agent is other than water or an alcohol. Novel metal compounds of formulµ XMOMX, XMOM11(X) 2 OMX and (X) 2 M1OM11(X) 2 OM1(X) 2 (other than aluminium compounds), wherein each X is an acylate group, each M, M1 and M11 are divalent, trivalent and tetravalent metals respectively and at least 55 mol. per cent of the total acylate content of the compound is derived from a carboxylic acid having at least 7 carbon atoms, the remainder being derived from a carboxylic acid having less than 7 carbon atoms, are also claimed and are obtainable from the above process. Wood preservatives comprise liquid metal oxide acylates referred to above or solutions of the above metal oxide acylates.