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US4179426A Expired / Lapsed US ⏱️ 0.0 years remaining

Stable alkylhydridopolysiloxane emulsions

Assignee: Momentive Performance Materials GmbH
•
Filing: 1978-01-04
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Granted: 1979-12-18
•
Expires: 1998-01-04
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Abstract

Abstract An aqueous alkylhydridopolysiloxane emulsion is stabilized against loss of hydrogen by addition thereto of about 0.1 to 5% by weight of an emulsifier containing perfluoroalkyl groups. The emulsion may further contain a fluoroalkyl-substituted siloxane of the formula ##STR1## wherein R each independently is alkyl with 1 to 6 carbon atoms or phenyl, R F is fluoroalkyl with 4-12 carbon atoms, a is about 5 to 70, and b is about 5 to 70. Advantageously the emulsifier is a member selected from the group consisting of a perfluoroalkyl ether of the formula C.sub.x F.sub.2x+1 SO.sub.2 N (CH.sub.3) CO--(OCH.sub.2 --CH.sub.2).sub.n --(OCH CH 3 CH 2 ) m --OC 4 H 9 , wherein X=about 6-12, n=2-about 40 and m=2-about 40, and a perfluorinated alkane sulphonic acid salt of the formula C.sub.x F.sub.2x+1 SO.sub.3 N(C.sub.n H.sub.2n+1).sub.4 wherein x=6-12 and n=1-3.

Inventors

  • 👤 Hans-Horst Steinbach
  • 👤 Karl Schnurrbusch
  • 👤 Matthias Rieder
  • 👤 Otto Weiden

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 09:44
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/643; D06M15/657; C; C08; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42; C08L; C08L71/00; C08L71/02; C08L83/00; C08L83/04; C08L83/08; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/22; C08G77/24; C08G77/70

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 73 words
In an aqueous alkylhydridopolysiloxane emulsion, the improvement which comprises about 0.1-5% by weight of the total amount of emulsion of an emulsifier containing perfluoroalkyl groups and selected from the group consisting of an ether of the formula C.sub.x F.sub.2x+1 SO.sub.2 N(CH.sub.3)CO--(OCH.sub.2 --CH.sub.2).sub.n --(OCHCH.sub.3 CH.sub.2).sub.m --OC.sub.4 H.sub.9 and an alkanesulphonic acid salt of the formula C.sub.x F.sub.2x+1 SO.sub.3 N(C.sub.p H.sub.2p+1).sub.4 wherein x=6-12, m=2-40, n=2-40, and p=1-3, thereby stabilizing the emulsion against loss of hydrogen.
Claim 2
Dependent Claim 73 words
In an aqueous alkylhydridopolysiloxane emulsion, the improvement which comprises about 0.1-5% by weight of the total amount of emulsion of an emulsifier containing perfluoroalkyl groups and selected from the group consisting of an ether of the formula C.sub.x F.sub.2x+1 SO.sub.2 N(CH.sub.3)CO--(OCH.sub.2 --CH.sub.2).sub.n --(OCHCH.sub.3 CH.sub.2).sub.m --OC.sub.4 H.sub.9 and an alkanesulphonic acid salt of the formula C.sub.x F.sub.2x+1 SO.sub.3 N(C.sub.p H.sub.2p+1).sub.4 wherein x=6-12, m=2-40, n=2-40, and p=1-3, thereby stabilizing the emulsion against loss of hydrogen.
Claim 3
Dependent Claim 18 words
An emulsion according to claim 1, having a viscosity between about 5 and 500 cP at 20° C.
Claim 4
Dependent Claim 33 words
An emulsion according to claim 1, wherein the emulsion further contains a diorganosiloxane polymer and the total amount of diorganosiloxane polymer plus alkylhydridopolysiloxane is up to about 40% by weight of the emulsion.
Claim 5
Dependent Claim 53 words
An emulsion according to claim 1, wherein the emulsion further contains a fluoroalkyl-substituted siloxane of the formula ##STR3## wherein R each independently is alkyl with 1 to 6 carbon atoms or phenyl, R F is fluoroalkyl with 4-12 carbon atoms, a is about 5 to 70, and b is about 5 to 70.
Claim 6
Dependent Claim 44 words
An emulsion according to claim 4, wherein the emulsion further contains a diorganosiloxane polymer and the total amount of diorganisiloxane polymer plus alkylhydridopolysiloxane is up to about 40% by weight of the emulsion, the emulsifier being present in about 0.2 to 1.5% by weight.

References Cited (Backward Citations)

DE1037707B Cited
DE1161419B Cited
US3669702A Cited
US3442664A Cited
FR1565387A Cited
US3716518A Cited
US3935147A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-12-17 1983-06-18 1983-12-18 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-12-17 1987-06-18 1987-12-18 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-12-17 1991-06-18 1991-12-18 $7700.00 Window Closed / Lapsed

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