Patent US4525305A successfully refreshed from Google Patents.
US4525305A
Expired / Lapsed
US
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Leather with fluorochemical finish
Assignee: 3M Co
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Filing: 1982-10-25
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Granted: 1985-06-25
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Expires: 2002-10-25
Abstract
Abstract Fluorochemical aliphatic carboxylic acids, and water dispersible salts thereof, having fluoroaliphatic radicals and urylene and/or carbamato radicals, are used to impart oil and water repellency to fibrous substrates such as tanned leather.
Inventors
- 👤 Kalyanji U. Patel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:50
CPC Classifications
C; C14; C14C; C14C3/00; C14C3/02; C14C9/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
97 words
Compositions useful for imparting oil and water repellency to fibrous substrates when said substrates are contacted with said compositions, said compositions comprising fluorochemical compounds which are normally solid, water insoluble, aliphatic carboxylic acids and salts thereof which are self-dispersible in water, said compounds containing fluoroaliphatic and aliphatic carboxylic radicals, said fluoroaliphatic radicals having at least three fully fluorinated carbon atoms and a terminal perfluoromethyl group, and urylene and/or carbamato radicals, said radicals bonded together by organic linkages free of interfering moieties, said compounds containing at least 20 weight percent fluorine in the form of said fluoroaliphatic radical.
Claim 2
Dependent Claim
97 words
Compositions useful for imparting oil and water repellency to fibrous substrates when said substrates are contacted with said compositions, said compositions comprising fluorochemical compounds which are normally solid, water insoluble, aliphatic carboxylic acids and salts thereof which are self-dispersible in water, said compounds containing fluoroaliphatic and aliphatic carboxylic radicals, said fluoroaliphatic radicals having at least three fully fluorinated carbon atoms and a terminal perfluoromethyl group, and urylene and/or carbamato radicals, said radicals bonded together by organic linkages free of interfering moieties, said compounds containing at least 20 weight percent fluorine in the form of said fluoroaliphatic radical.
Claim 3
Dependent Claim
124 words
The compounds of claim 1 represented by the formula (R--Q--A--Q'--).sub.m (Q).sub.n COOM where R is said fluoroaliphatic radical or an aliphatic radical which is essentially fluorine-free, Q is said organic linkage, Q' is Q or Q--A--Q, each A is independently --NHCONH-- or --OCONH--, M is a hydrogen atom or an alkali metal, ammonium, or organoammonium ion, m is 1 or 2, with the provisos that if m is 1, R is said fluoroaliphatic radical, and if m is 2, at least one of the two R radicals is a fluoroaliphatic radical, n is zero or 1 with the proviso that when n is zero, m is 1, and said compounds contain at least 20 weight percent fluorine in the form of said fluoroaliphatic radical.
Claim 4
Dependent Claim
65 words
The compounds of claim 1 represented by the formula (R.sub.f --Q--A--Q').sub.2 QCOOM where R f is said fluoroaliphatic radical, each A is independently --NHCONH-- or --OCONH--, and M is a hydrogen atom or an alkali metal, ammonium, or organoammonium ion, Q is said organic linkage, Q' is Q--A--Q, and said compounds contain at least 20 weight percent fluorine in the form of said fluoroaliphatic radical.
Claim 5
Dependent Claim
66 words
The compounds of claim 1 represented by the formula R.sub.f --Q--A--Q'--COOM where R f is said fluoroaliphatic radical, each A is independently --NHCONH--([, --CONH--, --OCO--, ] or --OCONH--, M is a hydrogen atom or an alkali metal, ammonium, or organoammonium ion, Q is said organic linkage, Q' is Q--A--Q, and said compounds contain at least 20 weight percent fluorine in the form of said fluoroaliphatic radical.
Claim 6
Dependent Claim
73 words
The compounds of claim 1 represented by the formula ##STR29## where R f is said fluoroaliphatic radical, R h is an aliphatic radical which is essentially fluorine free, Q is said organic linkage, each A is independently --NHCONH-- or --OCONH--, Q' is Q--A--Q, M is a hydrogen atom or an alkali metal, ammonium, or organoammonium ion, and said compounds contain at least 20 weight percent fluorine in the form of said fluoroaliphatic radical.
Claim 7
Dependent Claim
9 words
A compound of claim 1 having the formula ##STR30##
Claim 8
Dependent Claim
39 words
A fluorochemical compound which is normally solid, water insoluble, self-dispersible in water, said compound containing fluoroaliphatic and aliphatic carboxylic radicals and urylene and/or carbamato radicals, said radicals bonded together by organic linkages, and said compound having the formula ##STR31##
Claim 9
Dependent Claim
39 words
A fluorochemical compound which is normally solid, water insoluble, self-dispersible in water, said compound containing fluoroaliphatic and aliphatic carboxylic radicals and urylene and/or carbamato radicals, said radicals bonded together by organic linkages, and said compound having the formula ##STR31##
Claim 10
Dependent Claim
9 words
The compounds of claim 3 wherein A is --OCONH--.
Claim 11
Dependent Claim
9 words
The compounds of claim 4 wherein A is --OCONH--.
Claim 12
Dependent Claim
9 words
The compounds of claim 5 wherein A is --OCONH--.
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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) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |