US5496866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
C3 to C5 polyfluoroalkanes propellants
Assignee: Bayer AG
•
Filing: 1990-01-24
•
Granted: 1996-03-05
•
Expires: 2010-01-24
Abstract
Abstract Polyfluoroalkanes are used as propellants in sprayable compositions or in the the preparation of plastic foams and in the electrical industry as cleansing and degreasing agents.
Inventors
- 👤 Claus-Dieter Sommerfeld
- 👤 Wilhelm Lamberts
- 👤 Dietmar Bielefeldt
- 👤 Albrecht Marhold
- 👤 Michael Negele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:38
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/50; C11D7/5004; C11D7/5018; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08J9/143; C08J9/144; C08J9/146; C09; C09K; C09K3/00; C09K3/30; C08J2207/00; C08J2207/04; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S521/00; Y10S521/902
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
201 words
A method of forming plastic foam compositions comprising foaming a plastic based on isocyanate in the presence of a propellant the improvement wherein the propellant comprises at least one polyfluoroalkane of the formula: CX.sub.3 --CY.sub.2 --R wherein each of the X radicals independently represents hydrogen or fluorine and either: (1) the CY 2 radical represents CH 2 , CHF or CH(CF 3 ), and R represents CH 2 F, CHF 2 , CH 3 , CF 3 , CF 2 --CH 3 , CF 2 --CH 2 F, CH 2 --CH 3 , CH 2 --CH 2 --CH 3 , or CH (CH 3 )--CH 3 ; or (2) the CY 2 radical represents CF 2 and R represents CH 2 F, CHF 2 , CH 3 , CF 2 --CH 3 , CF 2 --CH 2 F, CH 2 --CH 3 , CH 2 --CH 2 --CH 3 , or CH(CH 3 )--CH 3 ; wherein the polyfluoroalkane contains at least two fluorine atoms, and wherein when the CY 2 radical represents a --CH 2 -- group and the R radical represents a --CH 2 --CH 3 group, respectively, then the CX 3 radical represents a CHF 2 -- group.
Claim 2
Independent Claim
201 words
A method of forming plastic foam compositions comprising foaming a plastic based on isocyanate in the presence of a propellant the improvement wherein the propellant comprises at least one polyfluoroalkane of the formula: CX.sub.3 --CY.sub.2 --R wherein each of the X radicals independently represents hydrogen or fluorine and either: (1) the CY 2 radical represents CH 2 , CHF or CH(CF 3 ), and R represents CH 2 F, CHF 2 , CH 3 , CF 3 , CF 2 --CH 3 , CF 2 --CH 2 F, CH 2 --CH 3 , CH 2 --CH 2 --CH 3 , or CH (CH 3 )--CH 3 ; or (2) the CY 2 radical represents CF 2 and R represents CH 2 F, CHF 2 , CH 3 , CF 2 --CH 3 , CF 2 --CH 2 F, CH 2 --CH 3 , CH 2 --CH 2 --CH 3 , or CH(CH 3 )--CH 3 ; wherein the polyfluoroalkane contains at least two fluorine atoms, and wherein when the CY 2 radical represents a --CH 2 -- group and the R radical represents a --CH 2 --CH 3 group, respectively, then the CX 3 radical represents a CHF 2 -- group.
Claim 3
Dependent Claim
203 words
A closed cell plastic foam composition prepared by foaming a plastic material based on isocyanate in the presence of a propellant the improvement wherein the propellant comprises at least one polyfluoroalkane of the formula: CX.sub.3 --CY.sub.2 --R wherein each of the X radicals independently represents hydrogen or fluorine and either: (1) the CY 2 radical represents CH 2 , CHF or CH(CF 3 ), and R represents CH 2 F, CHF 2 , CH 3 , CF 3 , CF 2 --CH 3 , CF 2 --CH 2 F, CH 2 --CH 3 , CH 2 --CH 2 --CH 3 , or CH (CH 3 )--CH 3 ; or (2) the CY 2 radical represents CF 2 and R represents CH 2 F, CHF 2 , CH 3 , CF 2 --CH 3 , CF 2 --CH 2 F, CH 2 --CH 3 , CH 2 --CH 2 --CH 3 , or CH (CH 3 )--CH 3 ; wherein the polyfluoroalkane contains at least two fluorine atoms, and wherein when the CY 2 radical represents a --CH 2 -- group and the R radical represents a --CH 2 --CH 3 group, respectively, then the CX 3 radical represents a CHF 2 -- group.
Claim 4
Dependent Claim
203 words
A closed cell plastic foam composition prepared by foaming a plastic material based on isocyanate in the presence of a propellant the improvement wherein the propellant comprises at least one polyfluoroalkane of the formula: CX.sub.3 --CY.sub.2 --R wherein each of the X radicals independently represents hydrogen or fluorine and either: (1) the CY 2 radical represents CH 2 , CHF or CH(CF 3 ), and R represents CH 2 F, CHF 2 , CH 3 , CF 3 , CF 2 --CH 3 , CF 2 --CH 2 F, CH 2 --CH 3 , CH 2 --CH 2 --CH 3 , or CH (CH 3 )--CH 3 ; or (2) the CY 2 radical represents CF 2 and R represents CH 2 F, CHF 2 , CH 3 , CF 2 --CH 3 , CF 2 --CH 2 F, CH 2 --CH 3 , CH 2 --CH 2 --CH 3 , or CH (CH 3 )--CH 3 ; wherein the polyfluoroalkane contains at least two fluorine atoms, and wherein when the CY 2 radical represents a --CH 2 -- group and the R radical represents a --CH 2 --CH 3 group, respectively, then the CX 3 radical represents a CHF 2 -- group.
Claim 5
Dependent Claim
14 words
A method according to claim 1, wherein polyfluoroalkanes contain 3 to 7 fluorine atoms.
Claim 6
Dependent Claim
40 words
A method according to claim 1, wherein the CX 3 group of the polyfluoroalkanes is CF 3 , CHF 2 , or CH 3 and the CY 2 groups is CH 2 , CHF, CF 2 or C(CF 3 )H.
Claim 7
Dependent Claim
89 words
A method according to claim 1, wherein the polyfluoroalkanes are compounds in which X 3 , Y 2 and R are present in one of the following combinations ______________________________________
X.sub.3 Y.sub.2 R
______________________________________
F.sub.3 H.sub.2 CH.sub.2 F
F.sub.3 HF CH.sub.2 F
F.sub.3 H.sub.2 CHF.sub.2
HF.sub.2 F.sub.2 CH.sub.2 F
F.sub.3 HF CH.sub.3
H.sub.3 F.sub.2 CH.sub.3
F.sub.3 F.sub.2 CF.sub.2 --CH.sub.3
F.sub.3 HF CF.sub.2 --CH.sub.3
F.sub.3 H.sub.2 CF.sub.2 --CFH.sub.3
H.sub.3 F.sub.2 CF.sub.2 --CH.sub.3
F.sub.3 H.sub.2 CF.sub.2 --CH.sub.3
F.sub.3 HCF.sub.3 CH.sub.3
F.sub.3 H.sub.2 CH.sub.2 --CH.sub.2 --CH.sub.3
F.sub.3 H.sub.2 --CH(CH.sub.3)--CH.sub.3
F.sub.3 H.sub.2 CF.sub.3
______________________________________
Claim 8
Dependent Claim
16 words
A method according to claim 1, wherein the foams based on isocyanates are polyurethanes or polyisocyanurates.
Claim 9
Dependent Claim
19 words
A closed cell plastic foam composition according to claim 2 wherein the polyfluoroalkanes contain 3 to 7 fluorine atoms.
Claim 10
Dependent Claim
44 words
A closed cell plastic foam composition according to claim 2, wherein the CX 3 group of the polyfluoroalkanes is CF 3 , CHF 2 , or CH 3 and the CY 2 groups is CH 2 , CHF, CF 2 or C(CF 3 )H.
Claim 11
Dependent Claim
93 words
A closed cell plastic foam composition according to claim 2, wherein the polyfluoroalkanes are compounds in which X 3 , Y 2 and R are present in one of the following combinations ______________________________________
X.sub.3 Y.sub.2 R
______________________________________
F.sub.3 H.sub.2 CH.sub.2 F
F.sub.3 HF CH.sub.2 F
F.sub.3 H.sub.2 CHF.sub.2
HF.sub.2 F.sub.2 CH.sub.2 F
F.sub.3 HF CH.sub.3
H.sub.3 F.sub.2 CH.sub.3
F.sub.3 F.sub.2 CF.sub.2 --CH.sub.3
F.sub.3 HF CF.sub.2 --CH.sub.3
F.sub.3 H.sub.2 CF.sub.2 --CFH.sub.3
H.sub.3 F.sub.2 CF.sub.2 --CH.sub.3
F.sub.3 H.sub.2 CF.sub.2 --CH.sub.3
F.sub.3 HCF.sub.3 CH.sub.3
F.sub.3 H.sub.2 CH.sub.2 --CH.sub.2 --CH.sub.3
F.sub.3 H.sub.2 --CH(CH.sub.3)--CH.sub.3
F.sub.3 H.sub.2 CF.sub.3
______________________________________
Claim 12
Dependent Claim
23 words
A closed cell plastic foam composition according to claim 2, wherein foam material is prepared in the presence of propellant and insulating gases.
Claim 13
Dependent Claim
11 words
A method according to claim 1, wherein the propellant comprises 1,1,1,3,3,3-hexafluoropropane.
Claim 14
Dependent Claim
11 words
A method according to claim 1, wherein the propellant comprises 2,2,4,4-tetrafluorobutane.
Claim 15
Dependent Claim
11 words
A method according to claim 1, wherein the propellant comprises 1,1,1,3,3,3-hexafluoro-2-methylpropane.
Claim 16
Dependent Claim
11 words
A method according to claim 1, wherein the propellant comprises 1,1,1,3,3-pentafluoropropane.
Claim 17
Dependent Claim
11 words
A method according to claim 1, wherein the propellant comprises 1,1,1,3,3,4-hexafluorobutane.
Claim 18
Dependent Claim
15 words
A closed cell plastic foam composition according to claim 2, wherein the propellant comprises 1,1,1,3,3,3-hexafluoropropane.
Claim 19
Dependent Claim
15 words
A closed cell plastic foam composition according to claim 2, wherein the propellant comprises 2,2,4,4-tetrafluorobutane.
Claim 20
Dependent Claim
15 words
A closed cell plastic foam composition according to claim 2, wherein the propellant comprises 1,1,1,3,3,3-hexafluoro-2-methylpropane.
Claim 21
Dependent Claim
15 words
A closed cell plastic foam composition according to claim 2, wherein the propellant comprises 1,1,1,3,3-pentafluoropropane.
Claim 22
Dependent Claim
15 words
A closed cell plastic foam composition according to claim 2, wherein the propellant comprises 1,1,1,3,3,4-hexafluorobutane.
Claim 23
Dependent Claim
11 words
A method according to claim 1, wherein the propellant comprises 1,1,1,3,3-pentafluorobutane.
Claim 24
Dependent Claim
15 words
A closed cell plastic foam composition according to claim 2, wherein the propellant comprises 1,1,1,3,3-pentafluorobutane.
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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) | 1999-03-05 | 1999-09-04 | 2000-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-05 | 2003-09-04 | 2004-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-03-05 | 2007-09-04 | 2008-03-05 | $7700.00 | Window Closed / Lapsed |