Abstract: This invention provides air impermeable liquid-water resistant water-vapor-permeable composites that are highly oleophobic and some of which have enhanced water-vapor-permeable properties. In its broadest aspect, the composites comprise: a layer of a microporous polymer that is water-vapor permeable and which is oleophobic, and which is liquid water-resistant. This layer is in contact with an air-impermeable, liquid water resistant, polymer layer that is permeable to water-vapor molecules. The oleophobic microporous polymer layer confers enhanced oleophobicity. In another aspect, a third layer of a microporous, water vapor permeable polymer can also be present on the other side of the air-impermeable polymer layer.

Abstract: This invention relates to fluorochemical compositions, their preparation and their use as water- and oil-repellents, and substrates treated therewith. The fluorochemical composition comprises a mixture of fluorochemical compounds and/or polymers, each component having at least two fluoroaliphatic groups and a large hydrocarbon moiety such as derived from dimer acids, and the polymer having at least one fluoroaliphatic group and a plurality of said hydrocarbon moiety.

Abstract: A high efficiency filtration medium comprised of a nonwoven filter web of electret charged fibers of a nonconductive thermoplastic resin having a resistivity greater than 10.sup.14 ohm-cm, preferably polypropylene. The nonwoven filter web has a basis weight (BW) of less than 60 grams/m.sup.2, an effective fiber diameter (EFD) of less than 5 microns and a penetration (PEN) of less than 0.03%, wherein the ratio);BW/(EFD.PEN)is greater than 200. The invention filter medium can be easily used in applications requiring HEPA performance at relatively low pressure drops.

Abstract: A fabric possessing both cleanability and fluid resistant properties is provided which can, if desired, be transfer printed. The fabric includes a textile substrate treated with a fluorochemical stain resist agent. The treated textile substrate is covered substantially on the back with a layer of extrusion coated thermoplastic polymer which is pressed at least partially into the fabric substrate. A process for forming the fluid shield fabric according to the present invention is also provided.

Abstract: The invention concerns a thin film of a permanent hydrophobic and optionally oleophobic finish for polymer surfaces. The film is formed from at least one layer of a water-soluble polycation and cationic synthetic resin. For further improvement of the oleophobic and permanent hydrophobic properties the film can additionally contain a long-chain surfactant or an alkyl-substituted polyanion.

Abstract: There is disclosed a belt assembly including: (a) an endless belt capable of repeated cycling over rollers having a first side edge and a second side edge and defining a center region between two side regions, wherein a low friction composition comprised of a fluoropolymer covers a portion of the length of the first side edge; and (b) a belt guide apparatus which contacts the first side edge during cycling of the belt to position the belt on the rollers, wherein the low friction composition reduces the wear of the belt at the first side edge.

Abstract: The invention covers an antiwetting composition for imparting hydrophobic properties onto fabrics and fibrous substrates, as well as a method for producing a hydrophobic article. The composition of the present invention includes a dispersion of polymeric fluoroaliphatic ester and a silicone resin prepolymer in a water-based carrier. The polymeric fluoroaliphatic ester is included in the dispersion at about 0.12 to 0.5 percent solids by weight. The silicone resin prepolymer is generally a polysiloxane having silanol terminal groups. The silicone compound is added to the dispersion in a range of about 0.08 to about 0.34 percent solids by weight. The components are impregnated in a fiber substrate and subsequently cured to provide an article having improved hydrophobic properties over known antiwetting compositions.

Abstract: Substrates which have been provided with an oil-, water- and soil-repellant treatment from the group consisting of naturally occurring and synthetic textiles and their mixtures, leather, mineral substances, thermoplastic and thermosetting polymers and paper, comprise fluorine-containing compositions which comprise two components A and B.Component A is a fluorine-containing acrylic copolymer with the following comonomers:a) (meth)acrylates containing perfluoroalkyl groupsC.sub.n F.sub.2n+1 --X--O--CO--CR.sup.1 .dbd.CH.sub.2 (I),b) monomers from the group consisting of styrene, acrylonitrile, vinyl acetate, vinyl propionate and monomers,CH.sub.2 .dbd.CR.sup.4 --CO----OR.sup.5 (II),c) monomers ##STR1## and d) monomersCH.sub.2 .dbd.CR.sup.11 COO--CH.sub.2 CH.sub.2 N(R.sup.9, R.sup.10) (IVa)or in quaternized form?CH.sub.2 .dbd.CR.sup.11 --COO--CH.sub.2 CH.sub.2 N(R.sup.9 R.sup.10 R.sup.12)!.sup..sym. Y.sup..crclbar. (IVb)or in N-oxidized form ##STR2## or of the formulaCH.sub.2 .dbd.CR.sup.13 --COO.sup..sym. Z.sup.

Abstract: A moisture-permeable, waterproof fabric comprising a textile fabric and a resin coating containing a fluorine-containing polyurethane resin and polyurethane resin having a low degree of polymerization on at least one side of said textile fabric. This moisture-permeable, waterproof fabric is obtained by a process comprising coating a resin solution, containing a fluorine-containing polyurethane resin and a polyurethane resin having a low degree of polymerization, on at least one side of a textile fabric, followed by coagulating the resin, removing the solvent, drying the fabric and applying a water repellent.

Abstract: In accordance with the present invention there is provided a corrosion resistant surfacing veil of a thermoplastic fluoropolymer, and corrosion resistant reinforced thermoset plastic laminates having a surfacing veil of a thermoplastic fluoropolymer.