Composite resin, coating composition containing such resin, and coated article

A coating composition comprising

• a composite resin which has been produced by hydrolyzing and condensing a silane compound (2) consisting of a bissilane compound (B) represented by:
• XnR3-nSi—Y—SiR3-nXn (B)
• wherein Y is a divalent organic group which is optionally substituted with a fluorine atom or a divalent organic group which optionally contains an aromatic ring, R is a monovalent organic group, X is OH group or a hydrolyzable group, and n is 1, 2, or 3, and
• a silane compound represented by the following general formula (C):
• F(CF2)aC2H4—SiR3-bXb (C)
• wherein R and X are as described above, a is 4, 6, 8, 10, or 12, and b is 2 or 3, the bissilane compound/the silane compound being used in the ratio by weight of 75/25 to 100/0,
• in the presence of (1) porous and/or hollow inorganic oxide fine particles (A) wherein the porous and/or hollow inorganic oxide fine particles and the organosilicon compound containing the bissilane compound are used in a weight ratio of the inorganic oxide fine particles/the organosilicon compound of 10/90 to 60/40;
• and which is an integral mixture of component (1) and component (2) which has undergone the hydrolysis and the condensation, and
• an organic solvent.

A coating composition consisting essentially of

• a composite resin which has been produced by hydrolyzing and condensing a silane compound (2) consisting of a bissilane compound (B) represented by:
• XnR3-nSi—Y—SiR3-nXn (B)
• wherein Y is a divalent organic group which is optionally substituted with a fluorine atom or a divalent organic group which optionally contains an aromatic ring, R is a monovalent organic group, X is OH group or a hydrolyzable group, and n is 1, 2, or 3, and
• a silane compound represented by the following general formula (C):
• F(CF2)aC2H4—SiR3-bXb (C)
• wherein R and X are as described above, a is 4, 6, 8, 10, or 12, and b is 2 or 3, the bissilane compound/the silane compound being used in the ratio by weight of 75/25 to 100/0,
• in the presence of (1) porous and/or hollow inorganic oxide fine particles (A) wherein the porous and/or hollow inorganic oxide fine particles and the organosilicon compound containing the bissilane compound are used at a weight ratio of the inorganic oxide fine particles/the organosilicon compound of 10/90 to 60/40;
• and
• which is an integral mixture of component (1) and component (2) which has undergone the hydrolysis and the condensation,
• an organic solvent, and
• optionally at least one component selected from the group consisting of a silicon-containing or fluorine-containing surfactant, an organic or inorganic UV absorbent, and a buffer.