Patent US4477643A successfully refreshed from Google Patents.
US4477643A
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Fluorinated polyurethanes
Assignee: NAVY United States, AS REPRESENTED BY SECRETARTY OF
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Filing: 1984-04-20
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Granted: 1984-10-16
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Expires: 2004-04-20
Abstract
Abstract Novel polymers and prepolymers are formed by reacting a fluorinated terti polyfunctional alcohol with an aliphatic diisocyanate or a biuret derivative of said diisocyanate in the presence of a suitable catalyst and in the absence of solvent. The novel polymers and prepolymers exhibit low surface energy properties and may be used in non-fouling coatings, foams and elastomers.
Inventors
- 👤 Teddy M. Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:49
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3802; C08G18/3804; C08G18/3812
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
48 words
The product of the reaction of a first reactant comprising a fluorinated tertiary polyfunctional alcohol and a second reactant comprising an aliphatic or cycloaliphatic diisocyanate or a biuret derivative of said diisocyanate, said reactants having been reacted in the neat state in the presence of a polyurethane-forming catalyst.
Claim 2
Dependent Claim
48 words
The product of the reaction of a first reactant comprising a fluorinated tertiary polyfunctional alcohol and a second reactant comprising an aliphatic or cycloaliphatic diisocyanate or a biuret derivative of said diisocyanate, said reactants having been reacted in the neat state in the presence of a polyurethane-forming catalyst.
Claim 3
Dependent Claim
29 words
The product of claim 1 where said diisocyanate comprises: OCN--R.sub.a --NCO wherein R a represents an aliphatic hydrocarbon diradical having 2 to 8 carbons or a cycloaliphatic hydrocarbon diradical.
Claim 4
Dependent Claim
12 words
The product of claim 2 wherein said second reactant comprises: OCN(CH.sub.2).sub.6 NCO.
Claim 5
Dependent Claim
14 words
The product of claim 3 wherein said reactants are reacted in a non-stoichiometric ratio.
Claim 6
Dependent Claim
20 words
The product of claim 4 wherein said first reactant and said second reactant have been reacted at about 50°-150° C.
Claim 7
Dependent Claim
19 words
The product of claim 5 wherein a molar excess of said first reactant is reacted with said second reactant.
Claim 8
Dependent Claim
19 words
The product of claim 5 wherein a molar excess of said second reactant is reacted with said first reactant.
Claim 9
Dependent Claim
64 words
The product of claim 1 wherein said first reactant comprises: ##STR5## wherein R is a hydrocarbon di- or triradical; w, x, y and z are integers from 0 to 10 and may be the same or different and L represents --H, ##STR6## or --(CF 2 ) v CF 3 wherein u and v are integers from 0-10 and may be the same or different.
Claim 10
Dependent Claim
27 words
The product of claim 8 wherein R is a meta- or para-substituted benzene diradical or a benzene triradical and w, x, y and z are the same.
Claim 11
Dependent Claim
9 words
The product of claim 9 wherein L represents --H.
Claim 12
Dependent Claim
13 words
The product of claim 10 wherein w, x, y and z are 0.
Claim 13
Dependent Claim
18 words
The product of claim 9 wherein said first and said second reactant are reacted in a stoichiometric ratio.
Claim 14
Dependent Claim
18 words
The product of claim 10 wherein said first and said second reactant are reacted in a non-stoichiometric ratio.
Claim 15
Dependent Claim
19 words
The product of claim 13 wherein a molar excess of said first reactant is reacted with said second reactant.
Claim 16
Dependent Claim
19 words
The product of claim 14 wherein a molar excess of said second reactant is reacted with said first reactant.
Claim 17
Dependent Claim
49 words
The product of the reaction of a first reactant comprising 1,3 bis (2-hydroxyhexafluoro-2-propyl) benzene, 1,4-bis(2-hydroxyhexafluoro-2-propyl benzene or a mixture thereof with a second reactant comprising 1,6 hexamethylene diisocyanate, said reactants having been reacted in the neat state at between about 50°-150° C. in the presence of a polyurethane-forming catalyst.
Claim 18
Dependent Claim
49 words
The product of the reaction of a first reactant comprising 1,3 bis (2-hydroxyhexafluoro-2-propyl) benzene, 1,4-bis(2-hydroxyhexafluoro-2-propyl benzene or a mixture thereof with a second reactant comprising 1,6 hexamethylene diisocyanate, said reactants having been reacted in the neat state at between about 50°-150° C. in the presence of a polyurethane-forming catalyst.
Claim 19
Dependent Claim
50 words
A process for producing fluorinated polyurethanes, the steps of which comprise: selecting a first reactant comprising a fluorinated tertiary polyfunctional alcohol; selecting a second reactant comprising a diisocyanate or a biuret derivative thereof; reacting said first and second reactants in the neat state in the presence of a polyurethane-forming catalyst.
Claim 20
Dependent Claim
50 words
A process for producing fluorinated polyurethanes, the steps of which comprise: selecting a first reactant comprising a fluorinated tertiary polyfunctional alcohol; selecting a second reactant comprising a diisocyanate or a biuret derivative thereof; reacting said first and second reactants in the neat state in the presence of a polyurethane-forming catalyst.
Claim 21
Dependent Claim
20 words
The process of claim 17 wherein said reacting step comprises reacting said first and second reactants in a stoichiometric ratio.
Claim 22
Dependent Claim
20 words
The process of claim 17 wherein said reacting step comprises reacting said first and second reactants in a non-stoichiometric ratio.
Claim 23
Dependent Claim
22 words
The process of claim 19 wherein said reacting step comprises reacting a molar excess of said first reactant with said second reactant.
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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) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |