To provide methods for producing a liquid composition, a coating liquid for a catalyst layer and a membrane electrode assembly, capable of making cracking less likely to occur at the time of forming a solid polymer electrolyte membrane or a catalyst layer. A copolymer having a structural unit represented by [CF.sub.2CF{(OCF.sub.2CFX).sub.mO.sub.p(CF.sub.2).sub.nSO.sub.3H}] (wherein X: F or CF.sub.3, m: 1 to 3, p: 0 or 1, and n: an integer of 1 to 12) and a structural unit derived from tetrafluoroethylene, is dispersed in a medium containing water and a hydrocarbon-type alcohol (but not including a fluorinated solvent) to prepare a dispersion wherein the concentration of the copolymer is from 13 to 26 mass %, and the dispersion and a fluorinated solvent are mixed so that the sum of the concentration of the copolymer and the concentration of the fluorinated solvent becomes to be from 17 to 35 mass %, to prepare a liquid composition.

Ethylsilicate polymers and a method of making, specifically ethylsilicate polymer binders with reduced levels of regulated volatile organic compounds (VOCs) for use in the coatings industry and casting industry, and more specifically to stable, fast cure ethylsilicate polymer binders with low levels of regulated VOCs.

Ethylsilicate polymers and a method of making, specifically ethylsilicate polymer binders with reduced levels of regulated volatile organic compounds (VOCs) for use in the coatings industry and casting industry, and more specifically to stable, fast cure ethylsilicate polymer binders with low levels of regulated VOCs.

A nanoporous open-cell foam or wick structure and method for production are disclosed. The nanoporous foam or wick structures are produced from, for example, thermoplastic or thermoset polymer gels in which a gelation solvent is removed so as to preserve an expanded monolithic gel structure consisting of intertwined and or chemically crosslinked polymer molecular fibrils. The nanoporous foam or wick may encompass a stand-alone structure, or be incorporated in to microporous open cell foams or wick materials converting them in to nanoporous cellular materials having a bipore structure. Such produced nanoporous polymer materials have unique properties that may be exploited for making high performance capillary pump loop or heat pipe thermal management systems, low-boiloff slosh-less cryogen storage vessels and superior insulation materials for systems operating under ambient and elevated pressure conditions.

The present application relates to a biocompatible composite and a manufacturing method therefor. Since the biocompatible composite is prepared by mixing a dispersion in which calcium phosphate particles are sufficiently dispersed and a biodegradable polymer dispersion, the calcium phosphate particles are more uniformly dispersed in a biodegradable polymer matrix, so that the calcium phosphate particles are uniformly released when composite is applied to the body.

A composition comprising: (a) at least one active component; and (b) a carrier in an amount effective to at least partially solvate or at least partially emulsify said active component, said carrier comprising monochloro,trifluoropropene.

The present invention relates to compositions comprising 1,1,1,2,2-pentafluoropropane and trans-1,3,3,3-tetrafluoropropene, which are of use in numerous fields of application.

A solvent composition and method for making same is disclosed having a composition between 26 to 90 weight percent propionate, butyrate, or combination thereof and between 10 to 74 weight percent fluorinated solvent blend, wherein the fluorinated solvent blend includes t-DCE. A polymer solvent system is also disclosed incorporating the solvent composition and dissolved polymers, such as SEBS polymers. The solvent composition and polymer solvent system is minimally combustible or preferably nonflammable.

Disclosed is a method for preparation and activation of a super hydrophobic electret nanofibrous filter material for cleaning PM2.5, comprising the steps as follows: (1) dissolving polymer powders and resin into a corresponding solvent so as to prepare a polymer solution, then stirring on a magnetic stirrer and standing for use; (2) in order to reinforce the electrostatic effect of the fiber, before preparing the polymer solution, adding in organic electret nanoparticles into the solvent, then oscillating with an ultrasonic oscillator; (3) in order to reinforce the super hydrophobic effect of the filter, spraying a low surface energy solution on the prepared nanofiber with a designed nozzle to carry out modification.

A process for the preparation of beads including a biocompatible hydrophobic polymer, a perfluorocarbon, polyvinylalcohol and optionally a metal compound, including the steps of: adding the perfluorocarbon and optionally the metal compound to a solution of the biocompatible hydrophobic polymer in a polar solvent to provide a first liquid mixture, adding the first liquid mixture to an aqueous solution of a biocompatible surfactant including polyvinylalcohol under sonication to obtain a second liquid mixture, a) maintaining the sonication of the second liquid mixture while cooling, b) evaporating the polar solvent from the second liquid mixture to obtain a suspension of beads including the biocompatible hydrophobic polymer, the perfluorocarbon and optionally the metal compound, c) separating the beads from the suspension and preparing a water suspension of the beads and d) freeze-drying the water suspension to obtain the beads, wherein the addition of the first liquid mixture to the biocompatible surfactant in step b) is performed within a period of at most 10 seconds, wherein the sonication in step b) and the sonication in step c) are performed directly into the liquid mixtures by for example a probe or flow sonicator at an amplitude of at least 120 m for 0.01-10 minutes and wherein the weight ratio of the biocompatible surfactant to the biocompatible hydrophobic polymer is at least 3:1. Beads having close F-H2O interactions, which are suitable for imaging purposes.