Self-assembled silica condensates

A coating composition comprising:

• A) a self-assembled silica condensate formed by the hydrolysis of a reaction mixture comprising a silane functional polymer and a medium to long chain trialkoxy silane having a structure according to formula (2) or formula (3):
• wherein, for either formula (2) or formula (3), each R is independently an alkyl group having 1 to 4 carbon atoms;
• and
• B) a film-forming binder comprising:
• a crosslinkable component, wherein the crosslinkable component is a compound, oligomer and/or polymer comprising one or more functional groups selected from hydroxyl groups, amine groups, epoxy groups, carboxylic acid groups, anhydride groups, aspartate groups, acetoacetate groups, orthoester groups, and thiol groups;
• and
• at least one crosslinking component comprising functional groups capable of reacting with the functional groups of the crosslinkable component to form a crosslinked network, wherein the crosslinking component is a melamine resin or a compound, oligomer and/or polymer comprising one or more of carboxylic acid groups, anhydride groups, isocyanate groups, blocked isocyanate groups or combinations thereof.

A coated substrate comprising at least one layer of a coating composition comprising:

• A) a self-assembled silica condensate formed by the hydrolysis of a reaction mixture comprising a tetraalkoxy orthosilicate and at least two medium to long chain trialkoxy silanes having a structure according to formula (1):
• (RO)3—Si—R1 (1);
• wherein each R is independently an alkyl group having 1 to 4 carbon atoms and R1 is an organic group comprising from 3 to 20 carbon atoms, wherein R1 of at least one of said medium to long chain trialkoxy silanes is an alkyl group, and R1 of at least one of said medium to long chain trialkoxy silanes is substituted with a functional group;
• and
• B) a film-forming binder comprising:
• a crosslinkable component, wherein the crosslinkable component is a compound, oligomer and/or polymer comprising one or more functional groups selected from hydroxyl groups, amine groups, epoxy groups, carboxylic acid groups, anhydride groups, aspartate groups, acetoacetate groups, orthoester groups, and thiol groups;
• and
• at least one crosslinking component comprising functional groups capable of reacting with the functional groups of the crosslinkable component to form a crosslinked network, wherein the crosslinking component is a melamine resin or a compound, oligomer and/or polymer comprising one or more of carboxylic acid groups, anhydride groups, isocyanate groups, blocked isocyanate groups or combinations thereof.