Patent ID: 6689468
Filing Date: 2004-02-10
Classification: C01P,C08K,C09C,Y10T

Abstract:
A process for preparing an organosilicon nanocapsule, which comprises reacting:(i) at least one oxide and/or mixed oxide (KAâ€”O) particle of at least one metal or semimetal selected from the group consisting of main groups two to six of the Periodic Table of the Elements, transition groups one to eight of the Periodic Table of the Elements, lanthanides, and combinations thereof, with (ii) at least one alkyltrialkoxysilane having the formula (II) (Z)3Siâ€”Râ€ƒâ€ƒ(II) wherein the Z's are identical or different and are each independently hydroxyl or alkoxy radicals; wherein R is a linear, branched, cyclic or substituted alkyl group having from 1 to 50 carbon atoms; and (iii) optionally, a monomeric and/or oligomeric silicic ester which carries at least one selected from the group consisting of methoxy, ethoxy, n-propoxy, i-propoxy group, and combinations thereof and has an average degree of oligomerization of from 1 to 50, and (iv) optionally, an organofunctional siloxane whose functionalities are identical or different and in which each silicon atom carries at least one functionality selected from the group consisting of n-alkyl, i-alkyl, cycloalkyl, fluoroalkyl, chloroalkyl, bromoalkyl, iodoalkyl, alkoxyalkyl, mercaptoalkyl, aminoalkyl, and combinations thereof, and remaining free valences of the silicon atoms in the siloxane are satisfied by methoxy or ethoxy or hydroxyl groups, and (v) optionally, a further organofunctional silane selected from the group consisting of aminoalkylalkoxysilane, mercaptoalkylalkoxysilane, epoxyalkoxysilane, alkoxyalkylalkoxysilane, fluoroalkylalkoxysilane, chloroalkylalkoxysilane, bromoalkylalkoxysilane and iodoalkylalkoxysilane, in situ in a liquid, curable synthetic resin or a precursor of a curable synthetic resin; wherein the reaction comprises: introducing, heated, the curable synthetic resin or the precursor of a curable synthetic resin, optionally adding catalyst, optionally adding a wetting agent, adding water, adding component (ii) and, optionally, components (iii) to (v), and then adding component (i) with mixing.