US5489328A
Expired / Lapsed
US
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Water repellent agent
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1995-01-30
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Granted: 1996-02-06
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Expires: 2015-01-30
Abstract
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.
Inventors
- 👤 Ichiro Ono
- 👤 Hitoshi Uehara
- 👤 Shoji Ichinohe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:05
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/22; C08G77/24; C08G77/48; C08G77/50; C09; C09D; C09D183/00; C09D183/04; C09D183/08; C09D183/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
214 words
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 1 is a monovalent hydrocarbon group having 1 to 4 carbon atoms, R 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 3 is a monovalent hydrocarbon group having 1 to 4 carbon atoms, R 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≦m+n≦100, with the proviso that at least one of the terminal A groups is a group represented by ##STR16## when n=0.
Claim 2
Dependent Claim
214 words
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 1 is a monovalent hydrocarbon group having 1 to 4 carbon atoms, R 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 3 is a monovalent hydrocarbon group having 1 to 4 carbon atoms, R 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≦m+n≦100, with the proviso that at least one of the terminal A groups is a group represented by ##STR16## when n=0.
Claim 3
Dependent Claim
40 words
The water repellent agent of claim 1 wherein the perfluoroalkyl group-containing silicon compound of formula (I) and the hydrolyzable group-containing methylpolysiloxane compound of formula (II) are co-hydrolyzed such that the weight ratio of (I)/(II) is range from 10/90 to 90/10.
Claim 4
Dependent Claim
39 words
The water repellent agent of claim 1 wherein water is added in such an amount to provide 0.5 to 2 equivalents of water relative to the alkoxy and acyloxy groups available in the compounds of formulae (I) and (II).
Claim 5
Dependent Claim
15 words
The water repellent agent of claim 1 wherein acid is added to the hydrophilic solvent.
References Cited (Backward Citations)
US5442011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-02-05 | 1999-08-07 | 2000-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-05 | 2003-08-07 | 2004-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-05 | 2007-08-07 | 2008-02-06 | $7700.00 | Window Closed / Lapsed |