Coating liquid for forming hydrophilic film and method for produ

Compositions: coating or plastic – Coating or plastic compositions – Heavy metal compound containing

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427384, 4274193, 4274195, 428428, 428432, 428697, C09D 100, C03G 1725, C01B 3314, C01G 23047, B01J 1300

Patent

active

061102695

ABSTRACT:
The invention relates to a coating liquid for forming a hydrophilic film. This coating liquid comprises a first sol which is a titania sol; and a second sol which is at least one of a silica sol and an alumina sol. This titania sol is prepared by a method comprising the sequential steps of (a) mixing a first solution containing a titanium alkoxide with a diol represented by at least one of the following general formulas (1) and (2), thereby to prepare a second solution containing a titanium complex formed by a reaction of the titanium alkoxide with the diol; and (b) hydrolyzing the titanium complex in the second solution, thereby to prepare the titania sol. The coating liquid is stable or sufficiently long in pot life, and the hydrophilic film has a long time duration in hydrophilicity and a superior abrasion resistance. ##STR1## wherein R.sub.1 is H or C.sub.p H.sub.2p+1 where p is from 1 to 5, R.sub.2 is C.sub.q H.sub.2q+1 where q is from 1 to 5, R.sub.3 is C.sub.r H.sub.2r where r is from 1 to 3, R.sub.4 is H or C.sub.x H.sub.2x+1 where x is from 1 to 5, and R.sub.5 is H or C.sub.y H.sub.2y+1 where y is from 1 to 5.

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