Abstract: A module comprising a plurality of members for obtaining a gas having a specified gas concentrated therein from a mixture of at least two gases, each of said members comprising (a) a solid support plate and (b) a composite film comprised of a porous sheet-like material and one or a plurality of ultrathin solid membranes supported on the porous sheet-like material with a thickness of about 50 to about 5000 .ANG..

Abstract: A heat-and-moisture exchanger including a thin film-like porous material as a partitioning element for heat and moisture exchanges between two gases, said porous material containing numerous pores having an average diameter of not more than 5 microns and opened to both surfaces thereof, and having a thickness of not more than 500 microns, a specific surface area of at least 0.3 m.sup.2 /g, and a gas permeability having a value of at least 50 seconds/100 cc. This heat-and-moisture exchanger is used in a ventilating device and an air-conditioner.

Abstract: A process for producing ultrathin solid membranes from a solvent solution of an addition polymer derived from an ethylenically unsaturated hydrocarbon monomer or a conjugated unsaturated hydrocarbon monomer in a solvent composed mainly of a volatile, substantially water-immiscible organic liquid medium capable of dissolving the addition polymer and another organic compound having a distribution coefficient k, which is the ratio of the concentration of the other organic compound in the organic liquid medium to that in water, of from 0.5 to 35. The solvent satisfies the equationc.sub.1 -(a.sub.1 +b.sub.1).gtoreq.25wherein c.sub.1 is the surface tension (dynes/cm) of water, a.sub.1 is the surface tension (dynes/cm) of the solution of the addition polymer in the solvent, and b.sub.1 is the interfacial tension (dynes/cm) between the solvent solution and water.

Abstract: A novel composition comprising 100 parts by weight of an aromatic polyester, 5 to 150 parts by weight of powdery feldspar and optionally 5 to 120 parts by weight of a plate-like inorganic filler such as glass flakes and/or 1 to 100 parts by weight of a rubbery elastomer such as acrylic rubber. Up to a half of the powdery feldspar may be replaced by another pulverulent inorganic filler such as talc. The composition is useful as engineering plastics because it gives molded articles having high impact strength and heat distortion temperatures and reduced warping.

Abstract: A process for preparing polyesters having superior thermal stability, transparency and chemical resistance, which comprises (1) a first step of esterifying (A) a difunctional carboxylic acid containing at least 60 mole% of an aromatic dicarboxylic acid, (B) 0 to 80 mole%, based on component (A), of an aliphatic diol and/or a dihydroxybenzene and (C) an aromatic monohydroxy compound in an amount of at least 210 mole% as a total of it and component (B) based on component (A), the esterification being performed until the degree of esterification reaches at least 80%, (2) subsequently, a second step of adding 0 to 80 mole%, based on component (A), of component (B) and a bisphenol (D) in an amount of 100 to 130 mole% as a total of it and component (B) based on component (A) to the reaction product obtained in the first step and reacting the mixture, the total amount of components (B) used in the first and second steps being 0 to 80 mole% based on component (C), and (3) performing at least the first of the above st

Abstract: In a process for preparing soft polyesters which comprises reacting (A) terephthalic acid and/or its ester-forming derivative, (B) tetramethylene glycol and/or its ester-forming derivative and (C) a poly(oxyalkylene) glycol having a molecular weight of 500 to 5,000 and a ratio of the number of carbon atoms to that of oxygen atoms of 2 to 4.5, the improvement wherein after the reduced viscosity of the reaction product of the components (A), (B) and (C) has reached 0.1 (dl/g), the reaction product is further reacted with (D) a low-molecular-weight ester compound and/or a high-molecular-weight ester compound containing a terephthalic acid residue and an ethylene glycol residue or a low-molecular-weight ester compound and/or a high-molecular-weight ester compound containing a terephthalic acid residue and a 1,4-cyclohexane dimethanol residue to form a polyester-polyether block copolymer.

Abstract: An aromatic polyester resin composition with inhibited coloration comprising (1) 100 parts by weight of an aromatic polyester resin composed mainly of tetramethylene arylcarboxylate units and polymerized by a titanium compound catalyst, (2) 5 to 100 parts by weight of a polycarbonate resin and (3) a coloration inhibiting amount of at least one phosphorus compound, and a method for inhibiting the coloring phenomenon of a resin composition comprising the polyester resin (1) and polycarbonate resin (2).