WATER-REPELLENT AGENT, WATER-REPELLENT STRUCTURE, AND PRODUCTION METHOD FOR SAID STRUCTURE
A water-repellent structure includes a target object and a water-repellent portion on a surface to be treated of the target object. The water-repellent portion comprises a dried product of a water-repellent agent comprising a condensation product of a liquid composition comprising at least one selected from the group consisting of a polysiloxane compound having a hydrolyzable functional group or a condensable functional group and a hydrolyzate of the polysiloxane compound having a hydrolyzable functional group, or a liquid composition comprising at least one selected from the group consisting of a polysiloxane compound having a hydrolyzable functional group or a condensable functional group and a hydrolyzate of the polysiloxane compound having a hydrolyzable functional group.
1 . A water-repellent structure, comprising:
a target object; and
a water-repellent portion on a surface to be treated of the target object,
wherein the water-repellent portion comprises a dried product of a water-repellent agent comprising:
a condensation product of a liquid composition comprising at least one selected from the group consisting of a polysiloxane compound having a hydrolyzable functional group or a condensable functional group and a hydrolyzate of the polysiloxane compound having a hydrolyzable functional group, or
a liquid composition comprising at least one selected from the group consisting of a polysiloxane compound having a hydrolyzable functional group or a condensable functional group and a hydrolyzate of the polysiloxane compound having a hydrolyzable functional group.
2 . The water-repellent structure according to claim 1 , wherein the liquid composition further comprises silica particles.
3 . The water-repellent structure according to claim 2 , wherein a number of silanol groups per g of the silica particles is 10×10 18 to 1000×10 18 groups/g.
4 . The water-repellent structure according to claim 1 , wherein the polysiloxane compound comprises a compound represented by the following formula (A):
wherein R 1a represents a hydroxyalkyl group, R 2a represents an alkylene group, R 3a and R 4a each independently represent an alkyl group or an aryl group, and n represents an integer of 1 to 50.
5 . The water-repellent structure according to claim 1 , wherein the polysiloxane compound comprises a compound represented by the following formula (B):
wherein R 1b represents an alkyl group, an alkoxy group or an aryl group, R 2b and R 3b each independently represent an alkoxy group, R 4b and R 5b each independently represent an alkyl group or an aryl group, and m represents an integer of 1 to 50.
6 . The water-repellent structure according to claim 1 , wherein the liquid composition further comprises at least one selected from the group consisting of a silane monomer having a hydrolyzable functional group or a condensable functional group, and a hydrolyzate of the silane monomer having a hydrolyzable functional group.
7 . The water-repellent structure according to claim 1 , wherein the water-repellent portion does not comprise an aerogel.