摘要:
The present invention provides the use of a fluorinated polyether composition as a surfactant, said fluorinated polyether composition comprising a mixture of fluorinated polyethers of the formula: (Rf)n—Xw—Z (I) wherein n is 1 or 2, w is 0 or 1, X is a divalent or trivalent organic linking group, Z is a polar group selected from the group consisting of an acid group or a salt thereof, an ammonium group, an amine-oxide group and an amphoteric group, and Rf represents a perfluorinated polyether group of the formula: CF3CF2CF2—O—[CF(CF3)CF2O]k—CF(CF3)— wherein k is at least 1; said mixture of fluorinated polyethers having a weight average molecular weight between 750 g/mol and 5000 g/mol and the amount of perfluorinated polyether groups in said mixture where k is 2 or less, is not more than 10% by weight of the total amount of perfluorinated polyether groups in said mixture.
摘要:
A fluorochemical composition for rendering fibrous substrates oil repellent, water repellent, and/or stain repellent and comprising a fluorinated polymer dispersed in water or dissolved or dispersed in an organic solvent, the fluorinated polymer comprising units derived from (i) a mixture of two or more fluorinated polyether monomers that differ in at least their molecular weight, the fluorinated polyether monomers having an ethylenically unsaturated group and a perfluorinated polyether group and wherein at least 90% by weight of the mixture consists of fluorinated polyether monomers that have a perfluorinated polyether group having a molecular weight of at least 750 g/mol and (ii) one or more units derived from one or more co-monomers other than a fluorinated polyether monomer and wherein the co-monomers comprise at least one non-fluorinated monomer. Also, method for treating fibrous substrate with such composition, fluorinated polyether monomers, and fluorinated polymers derived from such monomers.
摘要:
Method comprising contacting a hydrocarbon-bearing formation with a composition comprising solvent and a fluoropolyether compound. The fluoropolyether compound: is represented by formula Rf—[C(0)-NR1—X′—(Z)m]n; or comprises at least one first divalent unit represented by formula (I) and, at least one of, a second divalent unit comprising a pendant Z group; or a monovalent unit comprising a thioether linkage and at least one terminal Z group. Each Rf is independently a fluoropolyether group. Rf is a monovalent or divalent fluoropolyether group, and each Z group is independently —P(O)(OY)2 or —O—P(O)(OY)2. Hydrocarbon-bearing formations treated according to this method are also disclosed.
摘要:
There is provided a curable composition comprising: a) fluoropolyethers having a molecular weight of from about 400 g/mole up to about 20,000 g/mole and containing moieties selected from (—(CF2)4O—), (—(CF2)2O—), (—CF2O—) or combinations thereof and further containing at least one nitrile group at a terminal position or at a position that is adjacent to the terminal position; and b) one or more curing agents selected from non-fluorinated compounds containing one or more functional group linked to a common residue, said residue containing at least three carbon atoms wherein the functional groups are selected from primary amines, secondary amines and functional groups that generate primary or secondary amines upon heat treatment, wherein the composition can be cured by generating groups having a triazine structure. Also provided are cured composition, methods of making cured compositions, articles made by curing the cured compositions and methods of making articles using the curable composition.
摘要:
There is provided a method of treatment including (i) applying a treatment composition to at least a portion of the surface of a wheel rim and (ii) allowing a thus applied treatment composition to cure. There is also provided compounds and compositions useful in the method.
摘要:
Method comprising contacting a hydrocarbon-bearing formation with a composition comprising solvent and a fluoropolyether compound, wherein the fluoropolyether compound comprises at least one first divalent unit represented by formula: Each Rf is independently selected from the group consisting of Rfa—(O)t—CHL′-(CF2)n—; [Rfa—(O)t—C(L)H—CF2)—O]m—W—; Rfb—O—(CF2)p-; F(CkF2k)—(O—CkF2K(p—O—CF2—; and CF3—O—(CF2)3—OCF(CF3)—CF2)z—O-L1-. Treated hydrocarbon-bearing formations are also disclosed.
摘要:
Fluorinated polymeric microparticles, processes for preparing them and uses thereof as additives for fluid loss control of drilling fluids and methods of fluid loss control of drilling fluid loss with fluorinated microparticles and uses of fluoropolymers as fluid loss control agents. Said fluorinated polymeric microparticles comprise one or more repeating units derived from one or more fluorinated monomers and one or more repeating units derived from one or more acrylate monomers.