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US4247674A
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Use of bis(fluoroaliphaticsulfonyl)imides in polymerization of organocyclosiloxanes
Assignee: 3M Co
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Filing: 1979-08-13
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Granted: 1981-01-27
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Expires: 1999-08-13
Abstract
Abstract Bis(fluoroaliphaticsulfonyl)imides are used as catalysts for the ring-opening polymerization of organocyclosiloxanes to produce lubricants, coatings or rubber precursors.
Inventors
- 👤 Robert J. Koshar
- 👤 Stephen W. Bany
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:47
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/06; C08G77/08
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
37 words
The process comprising the steps of mixing an organocyclosiloxane with from about 0.05 to 10 weight percent, based on the weight of the organocyclosiloxane, of a bis(fluoroaliphaticsulfonyl)imide as a catalyst for polymerization thereof and polymerizing said organocyclosiloxane.
Claim 2
Dependent Claim
37 words
The process comprising the steps of mixing an organocyclosiloxane with from about 0.05 to 10 weight percent, based on the weight of the organocyclosiloxane, of a bis(fluoroaliphaticsulfonyl)imide as a catalyst for polymerization thereof and polymerizing said organocyclosiloxane.
Claim 3
Dependent Claim
24 words
A process according to claim 1 wherein said catalyst has the formula (R.sub.f SO.sub.2).sub.2 NH where R f is a fluorinated saturated aliphatic radical.
Claim 4
Dependent Claim
20 words
A process according to claim 1 wherein said catalyst is mixed with said organocyclosiloxane in the form of a solution.
Claim 5
Dependent Claim
26 words
A process according to claim 1 wherein said catalyst is mixed with said organocyclosiloxane and polymerization is effected by temperatures of 25° C. to 50° C.
Claim 6
Dependent Claim
70 words
A process according to claim 1 wherein said organocyclosiloxane has the formula ##STR6## wherein n has a value from 3 to 8, R is lower alkyl and R' is selected from the group consisting of hydrogen, halogen, hydroxy, monovalent hydrocarbon radical, halogenated monovalent hydrocarbon radical, carboxy hydrocarbon radical and esters, alkenyl hydrocarbon radical or cyanohydrocarbon radical having 1 to 12 carbon atoms, R and R' being the same or different.
Claim 7
Dependent Claim
23 words
A method according to claim 5 wherein said organocyclosiloxane has a formula ##STR7## wherein n is 3 or 4 and R is methyl.
Claim 8
Independent Claim
56 words
A method according to claims 5 or 6 wherein n has the value 3 or 4, one of the R' groups is hydrogen, halogen, hydroxy, monovalent hydrocarbon radical, halogenated monovalent hydrocarbon radical, carboxy hydrocarbon radical and esters, alkenyl hydrocarbon radical or cyanohydrocarbon radical having 1 to 12 carbon atoms and the remainder R' groups are methyl.
Claim 9
Independent Claim
36 words
A method of controlling the molecular weight of polysiloxane comprising mixing organocyclosiloxane, bis(perfluoroaliphaticsulfonyl)imide as a catalyst for polymerizing said organosiloxane and a chain terminating siloxane or silane and copolymerizing said organocyclosiloxane and said chain terminating agent.
Claim 10
Independent Claim
36 words
A method of controlling the molecular weight of polysiloxane comprising mixing organocyclosiloxane, bis(perfluoroaliphaticsulfonyl)imide as a catalyst for polymerizing said organosiloxane and a chain terminating siloxane or silane and copolymerizing said organocyclosiloxane and said chain terminating agent.
Claim 11
Dependent Claim
20 words
A method according to claim 5 wherein said organocyclosiloxane is selected from octamethylcyclotetrasiloxane, hexamethylcyclotrisiloxane, Bromomethylheptamethylcyclotetrasiloxane, Chloromethylheptamethylcyclotetrasiloxane, hydroheptamethylcyclotetrasiloxane, acryloyloxymethylheptamethylcyclotetrasiloxane, or methacryloyloxymethylheptamethylcyclotetrasiloxane.
Claim 12
Dependent Claim
20 words
The process according to claim 1 wherein about 1% by weight of a bis(fluoroaliphaticsulfonyl)imide catalyst is mixed with an organocyclosiloxane.
Claim 13
Dependent Claim
78 words
A process according to claim 2 wherein R f is a straight-chain, branched-chain or cyclic fluorinated saturated aliphatic radical of 1 to 18 carbon atoms that may be interrupted by heteroatoms selected from divalent oxygen atoms and trivalent nitrogen atoms wherein said aliphatic radical does not contain more than one such heteroatom for every two carbon atoms and where there is no more than one atom selected from hydrogen, bromine and chlorine present for every two carbon atoms.
Claim 14
Dependent Claim
11 words
A process according to claim 11 wherein R f is perfluorinated.
Claim 15
Dependent Claim
15 words
A process according to claim 11 wherein R f comprises 1 to 8 carbon atoms.
Claim 16
Dependent Claim
87 words
A process according to claim 5 wherein said catalyst has the formula (R.sub.f SO.sub.2).sub.2 NH wherein R f is a straight-chain, branched-chain or cyclic fluorinated saturated aliphatic radical of 1 to 18 carbon atoms that may be interrupted by heteroatoms selected from divalent oxygen atoms and trivalent nitrogen atoms wherein said aliphatic radical does not contain more than one such heteroatom for every two carbon atoms and where there is no more than one atom selected from hydrogen, bromine and chlorine present for every two carbon atoms.
Claim 17
Dependent Claim
11 words
A process according to claim 5 wherein R f is perfluorinated.
Claim 18
Dependent Claim
15 words
A process according to claim 5 wherein R f comprises 1 to 8 carbon atoms.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |