Abstract: A process for the preparation of an organosilicon condensate which comprises reacting together (A) at least one silicon containing compound having at least one silanol group; and (B) at least one silicon containing compound having at least one —OR group in the presence of (C) a calcium or magnesium catalyst selected to allow the reaction to proceed and (D) at least one solvent. Advantageous catalysts include calcium hydroxide, calcium oxide, magnesium hydroxide or magnesium oxide. Advantageously the solvent may be a protic solvent such as water, methanol, ethanol, 1-propanol, 2-propanol, 1-butanol and 2-butanol. The invention also relates to condensates, such as siloxanes, prepared by the process.

Abstract: A method of synthesizing metal alkoxide polymers is provided, for use, as an example, in synthesizing hybrid organic/inorganic materials with low optical absorption for optical applications. The method involves a plurality of acidolysis steps involving acidolysis of a metal alkoxide compound with an acid to produce an intermediate acidolysed solution, and combining and condensing the intermediate acidolysed solutions to produce the metal alkoxide polymer.

Abstract: A process for the preparation of an organosilicon condensate which comprises reacting together (A) at least one silicon containing compound having at least one silanol group; and (B) at least one silicon containing compound having at least one —OR group in the presence of (C) a calcium or magnesium catalyst selected to allow the reaction to proceed and (D) at least one solvent. Advantageous catalysts include calcium hydroxide, calcium oxide, magnesium hydroxide or magnesium oxide. Advantageously the solvent may be a protic solvent such as water, methanol, ethanol, 1-propanol, 2-propanol, 1-butanol and 2-butanol. The invention also relates to condensates, such as siloxanes, prepared by the process.

Abstract: The present invention relates generally to a method of synthesising a metal alkoxide polymer involving the following general steps: 1. acidolysis; 2. condensation; and 3. subsequent processing. The acidolysis step is preferably performed without addition of water, in the presence of a mutual solvent. The acidolysis step involves acidolysis of a metal alkoxide compound with an acid to produce an intermediate acidolysed solution. The condensation step involves condensation of the intermediate solution in the presence of a metal alkoxide compound to produce the metal alkoxide polymer.

Abstract: A process for the preparation of an organosilicon condensate which comprises reacting together (A) at least one silicon containing compound having at least one silanol group; and (B) at least one silicon containing compound having at least one —OR group in the presence of (C) a calcium or magnesium catalyst selected to allow the reaction to proceed and (D) at least one solvent. Advantageous catalysts include calcium hydroxide, calcium oxide, magnesium hydroxide or magnesium oxide. Advantageously the solvent may be a protic solvent such as water, methanol, ethanol, 1-propanol, 2-propanol, 1-butanol and 2-butanol. The invention also relates to condensates, such as siloxanes, prepared by the process.

Abstract: A method of synthesizing metal alkoxide polymers is provided, for use, as an example, in synthesizing hybrid organic/inorganic materials with low optical absorption for optical applications. The method involves a plurality of acidolysis steps involving acidolysis of a metal alkoxide compound with an acid to produce an intermediate acidolysed solution, and combining and condensing the intermediate acidolysed solutions to produce the metal alkoxide polymer.

Abstract: The present invention relates generally to a method of synthesising a metal alkoxide polymer involving the following general steps: 1. acidolysis; 2. condensation; and 3. subsequent processing. The acidolysis step is preferably performed without addition of water, in the presence of a mutual solvent. The acidolysis step involves acidolysis of a metal alkoxide compound with an acid to produce an intermediate acidolysed solution. The condensation step involves condensation of the intermediate solution in the presence of a metal alkoxide compound to produce the metal alkoxide polymer.