US6468587B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of fibrous substrates with acidic silsesquioxanes emulsions
Assignee: 3M Innovative Properties Co
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Filing: 2001-06-11
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Granted: 2002-10-22
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Expires: 2021-06-11
Abstract
Abstract This invention relates to a method for imparting soil-resistant and water-repellent properties to fibrous polyamide substrates (such as carpet fibers) by applying an acidic aqueous treating solution containing a silsesquioxane. This invention also relates to the treating solution used to impart soil resistance, and water repellency to the fibrous polyamide. This invention also relates to treated fibrous substrate made according to the method of this invention.
Inventors
- 👤 John C. Chang
- 👤 Angela J. Nixon
- 👤 Irvin F. Dunsmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:59
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/50; D06M13/51; D06M13/513; D06M2101/00; D06M2101/16; D06M2101/30; D06M2101/34; D06M2200/00; D06M2200/10; D06M2200/12; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
40 words
A method for treating a fibrous substrate, comprising the steps of: providing a fibrous substrate; applying to the substrate an acidic aqueous composition consisting essentially of a silsesquioxane, wherein the composition has a pH less than or equal to 4.
Claim 2
Independent Claim
40 words
A method for treating a fibrous substrate, comprising the steps of: providing a fibrous substrate; applying to the substrate an acidic aqueous composition consisting essentially of a silsesquioxane, wherein the composition has a pH less than or equal to 4.
Claim 3
Dependent Claim
18 words
The method of claim 1 , wherein the composition had a pH less than or equal to 2.
Claim 4
Dependent Claim
32 words
The method of claim 1 , wherein said silsesquioxane comprise compounds of the formula RSiO 3/2 where R is a substituted or unsubstituted alkyl or aryl of up to 7 carbon atoms.
Claim 5
Dependent Claim
26 words
The method of claim 1 , wherein said silsesquioxane comprise cocondensates of hydrosylates of tetraalkoxysilanes with organotrialkoxysilanes, said cocondensate having RSiO 3/2 or SiO 2 units.
Claim 6
Dependent Claim
18 words
The method of claim 1 , wherein the composition is applied by means of a flex nip process.
Claim 7
Dependent Claim
23 words
The method of claim 1 , further comprising the step of exposing the substrate to steam after it is treated with the composition.
Claim 8
Dependent Claim
12 words
The method of claim 1 , wherein the substrate is a carpet.
Claim 9
Dependent Claim
11 words
The method of claim 7 , wherein the carpet comprises nylon.
Claim 10
Dependent Claim
16 words
The method of claim 1 , wherein said composition comprises 0.0025 to 0.25 wt. % silsesquioxane.
Claim 11
Dependent Claim
14 words
The method of claim 1 , wherein said composition is a solution or dispersion.
Claim 12
Dependent Claim
53 words
The method of claim 4 , wherein said silsesquioxane comprises cocondensates of silanes of the formula R—Si(OR′) 3 , with silanes of the formula Si(OR′) 4 wherein R represents a substituted or unsubstituted hydrocarbon radical having 1 to 7 carbon atoms, and R′ represents an alkyl radical with 1 to 4 carbons atoms.
Claim 13
Dependent Claim
26 words
The method of claim 11 , wherein silanes of the formula Si(OR′) 4 comprises 2 to 50 weight percent of the total weight of silane cocondensates.
Claim 14
Dependent Claim
18 words
The method of claim 10 , wherein said dispersion has a particle size of 200 to 500 Angstroms.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-10-21 | 2006-04-22 | 2006-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-10-21 | 2010-04-22 | 2010-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-10-21 | 2014-04-22 | 2014-10-22 | $7700.00 | Window Closed / Lapsed |