Patent US178073A successfully refreshed from Google Patents.
Patent US4834764A successfully refreshed from Google Patents.
US4834764A
Expired / Lapsed
US
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Process for obtaining wash-and cleaning resistant textile finishes with reactive perfluoroalkyl-containing (co) polymers and/or precondensates and a blocked isocyanate compound
Assignee: BASF Corp
•
Filing: 1987-11-20
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Granted: 1989-05-30
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Expires: 2007-11-20
Abstract
Abstract The present invention relates to a process for obtaining wash- and cleaning-resistant textile finishes by impregnating with customary reactive perfluoroalkyl-containing (co)polymers and/or precondensates in aqueous dispersion and concluding heating, wherein the dispersions have NCO-containing compounds which have a molecular weight of at least 450 and/or contain a diphenylmethane-based polyisocyanate mixture in blocked form. The process according to the invention has made it possible to equip textiles with water-repellant and oil-repellant finishes which are very highly wash- and cleaning-resistant.
Inventors
- 👤 Hans Deiner
- 👤 Bernhard Sandner
- 👤 Franz Mosch
- 👤 Willy Bernheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:25
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; D06M15/437; D06M15/21; D06M15/285; D06M15/295; D06M15/564; D06M15/576
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
92 words
In a process for obtaining a wash- and dry-cleaning-resistant textile finish by impregnating the textile with a perfluoroalkyl-containing polymer and/or precondensate which contains a reactive OH or OR group, wherein R is an alkyl radical of 1 to 3 carbon atoms, applied in an aqueous dispersion, and subsequently heating the impregnated textile to cure the finish, the improvement wherein the aqueous dispersion further contains a blocked isocyanate compound, said compound before blocking being selected from the group consisting of isocyanate compounds having a molecular weight of at least 450 and diphenylmethane dissocyanate.
Claim 2
Dependent Claim
92 words
In a process for obtaining a wash- and dry-cleaning-resistant textile finish by impregnating the textile with a perfluoroalkyl-containing polymer and/or precondensate which contains a reactive OH or OR group, wherein R is an alkyl radical of 1 to 3 carbon atoms, applied in an aqueous dispersion, and subsequently heating the impregnated textile to cure the finish, the improvement wherein the aqueous dispersion further contains a blocked isocyanate compound, said compound before blocking being selected from the group consisting of isocyanate compounds having a molecular weight of at least 450 and diphenylmethane dissocyanate.
Claim 3
Dependent Claim
17 words
A process of claim 1, wherein the isocyanate compound has a molecular weight of at least 600.
Claim 4
Dependent Claim
31 words
A process of claim 1, wherein the blocked isocyanate compound is used in an amount of 3 to 25% by weight, based on the dry weight of perfluoroalkyl-containing polymer and/or precondensate.
Claim 5
Dependent Claim
31 words
A process of claim 1, wherein the blocked isocyanate compound is used in an amount of 7 to 17% by weight, based on the dry weight of perfluoroalkyl-containing polymer and/or precondensate.
Claim 6
Dependent Claim
16 words
A process of claim 1, wherein the aqueous dispersion containing the blocked isocyanate compound is organic-solvent-free.
Claim 7
Dependent Claim
17 words
A process of claim 1, wherein the blocked isocyanate compound is a blocked low molecular weight polyurethane.
Claim 8
Dependent Claim
28 words
A process of claim 6, wherein the blocked low molecular weight polyurethane has a polyol-polyisocyanate equivalent ratio of at least 1:1.3 and the excess isocyanate groups are blocked.
Claim 9
Dependent Claim
14 words
A process of claim 7, wherein the polyol-polyisocyanate equivalent ratio is 1:1.5 to 2.5.
Claim 10
Dependent Claim
14 words
A process of claim 1, wherein the blocked isocyanate compound is a blocked polyisocyanate.
Claim 11
Dependent Claim
35 words
A process of claim 1, wherein the aqueous dispersion further contains a textile assistant selected from the group consisting of crease resist agents, softening agents, flame retardants, oleophobizing agents, hydrophobizing agents and permanent set agents.
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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) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |