Patent US4024178A successfully refreshed from Google Patents.
US4024178A
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Fluoroaliphatic radical containing carbodiimides
Assignee: 3M Co
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Filing: 1975-03-03
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Granted: 1977-05-17
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Expires: 1995-03-03
Abstract
Abstract Durably launderable and dry-cleanable repellency to water and oil is conferred on fabrics consisting essentially completely of hydrophobic synthetic fibers by application of a blend of a fluoroaliphatic vinyl polymer and a carbodiimide, preferably comprising fluoroaliphatic groups.
Inventors
- 👤 Dennis P. Landucci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:16
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/395; D06M13/402; D06M13/425; D06M13/428; D06M13/432; D06M15/00; D06M15/19; D06M15/21; D06M15/244
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
119 words
A solvent-soluble fluoroaliphatic radical-containing carbodiimide consisting essentially of from 1 to a plurality of carbodiimide groups, terminal organic radicals derived from mono- or polyisocyanate and free from isocyanate-reactive hydrogen atoms and connected to carbodiimide and, when two or more carbodiimide groups are present, polyvalent organic linking groups derived from organic polyisocyanate and free from isocyanate-reactive hydrogen atoms linking successive carbodiimide groups; fluoroaliphatic groups of 3 to 20 carbon atoms forming a part of said terminal organic radicals or organic linking groups in amounts such that said carbodiimide as a whole includes from 15 to 45% by weight of carbon-bonded fluorine and said carbodiimide as a whole exclusive of fluoroaliphatic radicals contains at least 12% by weight of carbodiimide groups.
Claim 2
Dependent Claim
119 words
A solvent-soluble fluoroaliphatic radical-containing carbodiimide consisting essentially of from 1 to a plurality of carbodiimide groups, terminal organic radicals derived from mono- or polyisocyanate and free from isocyanate-reactive hydrogen atoms and connected to carbodiimide and, when two or more carbodiimide groups are present, polyvalent organic linking groups derived from organic polyisocyanate and free from isocyanate-reactive hydrogen atoms linking successive carbodiimide groups; fluoroaliphatic groups of 3 to 20 carbon atoms forming a part of said terminal organic radicals or organic linking groups in amounts such that said carbodiimide as a whole includes from 15 to 45% by weight of carbon-bonded fluorine and said carbodiimide as a whole exclusive of fluoroaliphatic radicals contains at least 12% by weight of carbodiimide groups.
Claim 3
Dependent Claim
75 words
A fluoroaliphatic radical-containing carbodiimide according to claim 1 of the general formula: B--N=C=N-A).sub.n N=C=N--B wherein n is 0 or an integer from 1 to 20, A is a divalent organic linking group derived from diisocyanate and B is a monovalent organic terminal group derived from mono- or diisocyanate; fluoroaliphatic radicals with terminal CF 3 groups of from 3 to 20 fully fluorinated carbon atoms forming a part of at least one of A and B.
References Cited (Backward Citations)
US2941983A
Cited
FR1535979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |