Abstract: A laminate nanomold includes a layer of perfluoropolyether defining a cavity that has a predetermined shape and a support layer coupled with the layer of perfluoropolyether. The laminate can also include a tie-layer coupling the layer of perfluoropolyether with the support layer. The tie-layer can also include a photocurable component and a thermal curable component. The cavity can have a broadest dimension of less than 500 nanometers.

Abstract: A laminate nanomold includes a layer of perfluoropolyether defining a cavity that has a predetermined shape and a support layer coupled with the layer of perfluoropolyether. The laminate can also include a tie-layer coupling the layer of perfluoropolyether with the support layer. The tie-layer can also include a photocurable component and a thermal curable component. The cavity can have a broadest dimension of less than 500 nanometers.

Abstract: A nanoarray includes a fluoropolymer array defining a plurality of cavities where each cavity has a predetermined shape and is less than about 5 micrometers in a broadest cross-sectional dimension. The nanoarray also includes a composition discretely contained in each cavity, where the composition includes a linking group for coupling with a modifying group. The nanoarray can be fabricated from fluoropolyether or perfluoropolyether.

Abstract: A plurality of nanoparticles, a structure assembled therefrom, a method of forming the structure, including a plurality of particles where each particle of the plurality of particles is configured with a substantially predetermined shape and a largest dimension less than about 100 micrometers, and where each particle of the plurality of particles includes an opening through the particle.

Abstract: A laminate nanomold includes a layer of perfluoropolyether defining a cavity that has a predetermined shape and a support layer coupled with the layer of perfluoropolyether. The laminate can also include a tie-layer coupling the layer of perfluoropolyether with the support layer. The tie-layer can also include a photocurable component and a thermal curable component. The cavity can have a broadest dimension of less than 500 nanometers.

Abstract: A fluid filtration material made of a porous substrate, e.g. a membrane or a fabric, that is coated with a fluorinated copolymer that contains recurring vinyl alcohol units that have been reacted with a monoepoxide to aid in preventing loss of hydrophilicity in the coated material.

Abstract: An article of waterproof footwear and its method of manufacture are disclosed. The article of waterproof footwear has an upper containing a water-impermeable layer. The distal edge of the upper has a polymeric binding covering the distal edge and the inside and outside surfaces of the upper adjacent to the distal edge. The polymeric binding seals to a waterproof insole thereby effectively waterproofing the upper of the footwear. An outer sole is attached to the upper thereby forming the waterproof footwear.The method of manufacture allows production of a waterproof upper and the attachment to the upper of an outer sole, thereby forming the waterproof footwear of the invention.

Abstract: Normally hydrophobic fluoropolymer porous membranes having continuous pores are rendered hydrophilic by coating the pore interior with a mixture of at least one fluoroaliphatic surfactant and at least one hydrophilic but substantially water-insoluble polyurethane.

Abstract: Elastomeric composite fabrics are described which have a layered construction and are made of a microporous polymeric membrane, a water vapor permeable polymer, and an elastomeric thermoplastic nonwoven material. The elastomeric composite fabrics provide barrier properties with water vapor permeability and find utility in articles of wearing apparel and other articles which conform about another object.

Abstract: A coated product is provided and is comprised of a substrate and a coating comprised of a microporous scaffold having a high void volume and of open, interconnecting microstructure, the void being substantially filled with a chemical substance. The coating can be used by itself, or it can usefully be affixed to a wide variety of substrates. A method of making such products is also provided.

Abstract: A composite semipermeable membrane is provided comprised of:(a) a flexible film of microporous hydrophobic material having a polar molecule vapor transmission rate in excess of 10,000 gms/m.sup.2 .multidot.24 hours, preferably 100,000 gms/m.sup.2 .multidot.24 hours, and an advancing polar liquid contact angle exceeding 90 degrees, and(b) a continuous, crosslinked amorphous hydrophilic layer penetrated to an extent into the face of the hydrophobic layer. The hydrophilic layer, when appropriately located in the structure of the microporous hydrophobic material provides a composite membrane having a polar vapor transmission rate of the complete ensemble comparable to or even exceeding that of the hydrophobic material alone, and simultaneously offering two mechanisms of separation; that imposed by the microporous layer and that imposed by the continuous, dense amporphous polymer layer, and as such is capable of numerous separation operations.

Abstract: A coated product is provided that is comprised of a substrate and a coating comprised of a microporous scaffold material having a high void volume and open, interconnecting void microstructure, the scaffold material having a layer of a selected polyurethane thereon which extends in the voids. The coated product has good barrier properties with respect to bacteria, viruses, and air-borne particulate.

Abstract: A laminate is provided that comprises flexible moisture permeable adherends and a moisture permeable adhesive. The laminate has good moisture transmitting characteristics with good bond strength. The laminate finds utility in functional applications such as shoes. A particular group of laminates are provided that provide for both waterproof characteristics and breathability.

Abstract: The present invention provides a two component polyurethane system with excellent wetting properties for casting a supported or unsupported, expanded polytetrafluoroethylene structure. It consists essentially of a polyisocyanate component having an isocyanate functionality of 2.2 or less and a polyol blend having an overall hydroxyl functionality of 2.2 or less and a viscosity of less than 500 cps., preferably 200 cps. or less. The polyol blend consists essentially of (i) a linear polyether or polyester (about 200-2500 molecular weight), (ii) a diol or triol (less than 200 molecular weight), and (iii) a catalyst in an amount sufficient to provide gelling at greater than 2 minutes and less than 10 minutes. The isocyanate to hydroxyl ratio is between 0.95:1 and 1.10:1. In some cases, it is desirable to include selected siloxane surfactants when polyol blends with the higher viscosities, i.e., about 200-500 cps., are used. The casting system is useful for making membrane filters.

Abstract: Reactive, 100 percent solids, segmented, phase-separating polyurethane prepolymers are provided, being the reaction products of:(i) a polyol (A) having a number average molecular weight of from about 600 to about 3500 and having a functionality of at least 2;(ii) an isocyanate (B) having a functionality of at least 2; and(iii) a low molecular weight chain extender (C) having a molecular weight in a range lower than about 500 and having a functionality of at least 2,characterized in that the above reactants are employed in such proportions as to satisfy the following equations: ##EQU1##Eq.sub.OH .gtoreq.Eq.sub.CE (b)Eq.sub.CE >O, (c)wherein Eq.sub.NCO is the equivalents of the isocyanate species employed, and Eq.sub.OH and Eq.sub.CE denote the equivalents, respectively, of the polyol and chain extender.