Patent ID: 7402621

Claim:
A method for preparing a composition for forming a porous film comprising the steps of: a) preparing Component (A), wherein Component (A) is selected from the group consisting of polysiloxane, silica, and zeolite particles; b) imparting crosslinkability to Component (A); and c) temporarily terminating the crosslinkability of Component (A), wherein the step of preparing component (A) takes place in the presence of a basic catalyst or a basic substance, the step of imparting crosslinkability to Component (A) comprises addition of Component (B), which comprises at least one organosilicon compound, the step of temporarily terminating the crosslinkability of Component (A) comprises addition of a carboxylic acid having at least two carboxyl groups in the molecule thereof, and the step of temporarily tenninating the crosslinkability of Component (A) takes place within one hour after the step of imparting crosslinkability to component (A).