Water repellent agent
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsIchiro Ono, Hitoshi Uehara, Shoji Ichinohe
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Abstract
A hydrolyzate resulting from co-hydrolysis of a perfluoroalkyl group-containing organic silicon compound and a hydrolyzable group-containing methylpolysiloxane compound in a hydrophilic solvent and water constitutes a water repellent agent which is effective for imparting water repellency and facilitating falling of water droplets and thus imparting excellent water repellency and stain-proofness to a surface of an article treated therewith.
Claims4
A water repellent agent comprising a hydrolyzate resulting from co-hydrolysis of a perfluoroalkyl group-containing organic silicon compound and a hydrolyzable group-containing methylpolysiloxane compound in a hydrophilic solvent and water,
- said perfluoroalkyl group-containing organic silicon compound having the following general formula (I):
- ##STR13## wherein R.sup.1 is a monovalent hydrocarbon group having 1 to 4 carbon atoms, R.sup.2 is an alkoxy or acyloxy group having 1 to 4 carbon atoms, Q is a divalent organic group having 2 to 10 carbon atoms, letter a is equal to 0 or 1, and p is an integer of 1 to 12, and
- said hydrolyzable group-containing methylpolysiloxane compound having the following general formula (II):
- ##STR14## wherein R.sup.3 is a monovalent hydrocarbon group having 1 to 4 carbon atoms, R.sup.4 is an alkoxy or acyloxy group having 1 to 4 carbon atoms, A is a methyl group or a group represented by ##STR15## Z is an oxygen atom or a divalent hydrocarbon group having 2 to 10 carbon atoms, letter b is equal to 0, 1 or 2, m is an integer of 3 to 100, n is an integer of 0 to 50, and 5.ltoreq.m+n.ltoreq.100, with the proviso that at least one of the terminal A groups is a group represented by ##STR16## when n=0.
Dependencies are inferred from the claim text.