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US4147743A Expired / Lapsed US ⏱️ 0.0 years remaining

Ampholytic, fluorine-containing esters of phosphorous acid

Assignee: Hoechst AG
•
Filing: 1977-12-09
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Granted: 1979-04-03
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Expires: 1997-12-09
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Abstract

Abstract Compounds of the formula ##STR1## wherein R f is a perfluoroalkyl group of 3 to 16 carbon atoms, R 1 and R 2 is hydrogen, lower alkyl of 1 to 4 carbon atoms, cyclohexyl, 2-hydroxyalkyl, or R f --(CF═CH) m --(CH 2 ) p --, Q is --(CH 2 ) x --, --CH 2 CHR--, or --CH 2 --CRR'--CH 2 -- (R is lower alkyl or phenyl, R' is lower alkyl, phenyl or hydrogen), x is an integer of 2 or 3, m is an integer of 0 or 1 and p is an integer of 1 to 4, are prepared by reacting florinated amines of the formula R.sub.4 --(CF═CH).sub.m --(CH.sub.2).sub.p --NR.sub.1 R.sub.2 with cyclic phosphites of the formula ##STR2## these compounds are useful for lowering the surface tension in aqueous solutions and as wetting agents in dry-cleaning processes for textiles.

Inventors

  • 👤 Heinrich Bathelt
  • 👤 Siegfried Billenstein
  • 👤 Erich Schuierer

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 02:02
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/141; C07F9/1411; C09; C09K; C09K23/00; C09K23/14

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 131 words
Ampholytic, fluorine-containing esters of phosphorous acid of the general formula ##STR138## in which R f represents a perfluoroalkyl radical having 3 to 16 C atoms, R 1 and R 2 which can be identical or different represent hydrogen atoms, short-chain alkyl radicals having 1 to 4 C atoms, cyclohexyl radicals, 2-hydroxyalkyl radicals or the radical R f --(CF═CH) m --(CH 2 ) p -- and Q represents alkylene radicals --(CH 2 ) x -- with x = 2 or 3 and alkylene radicals --CH 2 CHR-- or --CH 2 CRR'--CH 2 with R and R' being a short-chain alkyl radical or a phenyl radical, it also being possible for R' to be H, and in which, furthermore, m is 0 or 1 and p is an integer from 1 to 4.
Claim 2
Dependent Claim 131 words
Ampholytic, fluorine-containing esters of phosphorous acid of the general formula ##STR138## in which R f represents a perfluoroalkyl radical having 3 to 16 C atoms, R 1 and R 2 which can be identical or different represent hydrogen atoms, short-chain alkyl radicals having 1 to 4 C atoms, cyclohexyl radicals, 2-hydroxyalkyl radicals or the radical R f --(CF═CH) m --(CH 2 ) p -- and Q represents alkylene radicals --(CH 2 ) x -- with x = 2 or 3 and alkylene radicals --CH 2 CHR-- or --CH 2 CRR'--CH 2 with R and R' being a short-chain alkyl radical or a phenyl radical, it also being possible for R' to be H, and in which, furthermore, m is 0 or 1 and p is an integer from 1 to 4.

References Cited (Backward Citations)

US3856893A Cited
US3888978A Cited
US3928509A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-04-02 1982-10-02 1983-04-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-04-02 1986-10-02 1987-04-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-04-02 1990-10-02 1991-04-03 $7700.00 Window Closed / Lapsed

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