The object of the present invention is to attain water repellency as well as the heat resistance and the light resistance. the transparent film of the present invention comprises: a polysiloxane backbone; and a trialkylsilyl containing molecular chain bonded to a part of silicon atoms forming the polysiloxane backbone, wherein alkyl groups in the trialkylsilyl containing molecular chain may be replaced by fluoroalkyl groups, and the transparent film satisfies at least one of the relationships of:
(
B
H
−A
0
)/
A
0
×100(%)≧−27(%); and
(
B
L
−A
0
)/
A
0
×100(%)≧−15(%),
provided that A
0
is an initial contact angle of a liquid droplet on the transparent film, B
H
is a contact angle of a liquid droplet on the transparent film incubated at 200° C. for 24 hours, and B
L
is a contact angle of a liquid droplet on the transparent film irradiated by a xenon lamp with an intensity of 250 W for 100 hours.
本发明的目的是实现
水的防
水性以及耐热性和耐光性。该透明薄膜包括:聚
硅氧烷骨架;以及连接到形成聚
硅氧烷骨架的部分
硅原子上的三烷基
硅基含有分子链,其中三烷基
硅基含有分子链中的烷基可以被氟烷基所取代,且透明薄膜满足以下关系式中的至少一种:(BH−A0)/A0×100(%)≧−27(%);和(BL−A0)/A0×100(%)≧−15(%),其中A0是液滴在透明薄膜上的初始接触角,BH是在200℃下孵育24小时后液滴在透明薄膜上的接触角,而BL是在250W的
氙灯照射下100小时后液滴在透明薄膜上的接触角。