EP0151877A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Perfluoropolyether oligomers and polymers
Assignee: 3M Co
•
Filing: 1984-12-10
•
Granted: —
•
Expires: 2004-12-10
Abstract
Abstract Perfluoropolyether oligomers or block polymers, having a backbone with one or a plurality of perfluoropolyether segments each consisting essentially of (1) at least one perfluoroisopropyleneoxy unit, (2) a bis (perfluoro- methyleneoxy-terminated) unit, and (3) a perfluoroethylidene unit terminating each segment, the backbone of the perfluoropolyether being terminated with COF and/or a functional or nonfunctional derivative thereof, said perfluoropolyethers being made by reacting a perfluoroaliphatic diacid fluoride with hexafluoropropylene epoxide to produce an acid fluoride-terminated perfluoropolyether adduct or oligomer which than can be photopolymerized to yield an acid fluoride-terminated perfluoropolyether block polymer.
Inventors
- 👤 Patricia M. Minnesota Mining And Savu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 23:42
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/26; C07C; C07C59/00; C07C59/235; C07C59/305; C07C59/315; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/22; C08G65/223; C08G65/226; C08G65/26; C08G65/2639; C08G65/32; C08G65/321; C08G65/323; C08G65/3233; C08G65/329; C08G65/331; C08G65/3311; C08G65/3312
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
97 words
Perfluoropolyether substance comprising one or a mixture of polyether diacid fluoride compounds each consisting essentially of a plurality of perfluoropolyether segments bonded together in a chain each of which segments consist essentially of (1) at least one perfluoroisopropyleneoxy unit, (2) a bis(perfluoromethyleneoxy-terminated) unit of the formula -OCF 2 (R f ) x CF 2 O- where x is zero or 1 and R f is a fluoroaliphatic group, and (3) two perfluoroethylidene units terminating the ends of each said segment, the chain being terminated with -COF and functional and nonfunctional COF derivatives of said diacid fluoride compounds.
Claim 2
Dependent Claim
97 words
Perfluoropolyether substance comprising one or a mixture of polyether diacid fluoride compounds each consisting essentially of a plurality of perfluoropolyether segments bonded together in a chain each of which segments consist essentially of (1) at least one perfluoroisopropyleneoxy unit, (2) a bis(perfluoromethyleneoxy-terminated) unit of the formula -OCF 2 (R f ) x CF 2 O- where x is zero or 1 and R f is a fluoroaliphatic group, and (3) two perfluoroethylidene units terminating the ends of each said segment, the chain being terminated with -COF and functional and nonfunctional COF derivatives of said diacid fluoride compounds.
Claim 3
Dependent Claim
76 words
Perfluoropolyether substance according to claim 1 wherein said compounds are represented by the formula where each Z is independently a functional moiety or a nonfunctional moiety, n is an integer or number greater than 1, a and b are independently an integer or number up to about 10, with the proviso that the sum of a + b is equal to at least 1, x is zero or 1, and R f is a fluoroaliphatic group.
Claim 4
Dependent Claim
11 words
Perfluoropolyether substance according to claim 2 wherein each Z is COF.
Claim 5
Dependent Claim
16 words
Perfluoropolyether substance according to claim 2 wherein each Z is a moiety containing a polymerizable group.
Claim 6
Dependent Claim
24 words
Perfluoropolyether substance according to claim 2 wherein each Z is independently selected from the group consisting of CF 3 , F, Cl, or H.
Claim 7
Dependent Claim
156 words
Perfluoropolyether substance according to claim 2 wherein each Z is independently selected from the group consisting of H, X, CF 2 H, CF 2 X, CH 2 0H, COX, COR, COOH, COOM 1/y , COOR, CF 2 R, CH 2 OC(O)CR'=CH 2 . CON(R")R", CH 2 NH 2 , C H 2 NCO, CN, C 3 N 3 (R f ) 2 , CH 2 OCOR, where X is F, Cl, or Br, M is an ammonium radical or a monovalent metal atom, y is the valence of M, R is alkyl, aryl, or a combination thereof, R' is H or CH 3 , R" is H, said R, (CH 2 ) z Si(R'") 3 where z is 2 to 11 and R'" is a hydrolyzable group, or the two R" groups can together form an alkylene moiety which together with the amido nitrogen atom form a heterocyclic ring and R f is a fluoroaliphatic radical.
Claim 8
Dependent Claim
17 words
Perfluoropolyether substance according to claim 2 wherein (R f ) x is (CF 2 ) 2 .
Claim 9
Dependent Claim
17 words
Perfluoropolyether substance according to claim 2 wherein (R f ) x is CF 2 0CF 2 .
Claim 10
Dependent Claim
11 words
Perfluoropolyether substance according to claim 2 wherein each Z is Cl.
Claim 11
Dependent Claim
48 words
Perfluoropolyether substance having the formula wherein a and b are independently an integer or number up to about 10, x is 1, R f is a fluoroaliphatic group containing one or more catenary oxygen or nitrogen atoms, and n is an integer or number of at least one.
Claim 12
Dependent Claim
48 words
Perfluoropolyether substance having the formula wherein a and b are independently an integer or number up to about 10, x is 1, R f is a fluoroaliphatic group containing one or more catenary oxygen or nitrogen atoms, and n is an integer or number of at least one.
Claim 13
Dependent Claim
63 words
A process for preparing perfluoropolyether substances of claim 1 which comprises condensing a mole of perfluoroaliphatic diacid fluoride with at least 3 moles of hexafluoropropylene epoxide to produce an acid fluoride-terminated adduct having a segment consisting essentially of units (1), (2), and (3) as defined in claim 1, and irradiating said adduct with ultraviolet light to produce an acid fluoride-terminated perfluoroether block copolymer.
Claim 14
Dependent Claim
33 words
The process according to claim 11 wherein the said perfluoroaliphatic diacid fluoride has the formula FOC(R f ) x COF, wherein x is zero or 1 and R f is a fluoroaliphatic group.
Claim 15
Dependent Claim
17 words
The process according to claim 11 wherein said perfluoroaliphatic diacid fluoride is FOC(CF 2 ) 2 COF.
Claim 16
Dependent Claim
73 words
A process for preparing diacid fluoride perfluoropolyethers which comprises condensing .a mole of a perfluoroaliphatic diacid fluoride having the formula FOC(R f ) x COF with at least 3 moles of hexafluoropropylene epoxide wherein x is 1 and R f is a fluoroaliphatic group containing one or more catenary oxygen or nitrogen atoms to form said perfluoropolyethers having a segment consisting essentially of units (1), (2), and (3) as defined in claim 1.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.