Abstract: The invention relates to thermoplastic aromatic polycarbonates which structural units are characterized by their end groups which are residues of ##STR1## and is predicated on the surprising and unexpected findings that high melt flow polycarbonates of this type are rendered improved impact performance by admixing therewith small amounts of an impact modifier.

Abstract: Polycarbonate compositions comprising an aromatic polycarbonate resin wherein dispersed are powdered sulfates, are particularly suitable for the preparation of films characterized by their low coefficient of static friction, high light transmission and virtual freedom from haze.

Abstract: The present invention relates to high molecular weight thermoplastic hexahydro-furo-(3,2-b)-furane-3,6-diol based copolycarbonates useful as molding resins and to a method for their preparation.

Abstract: It is an object of the invention to provide a polycarbonate composition having improved mechanical properties and a process for the preparation of said composition. These objects are achieved in accordance with the present invention which teaches a blend of a polycarbonate resin and an additive amount of an aromatic bis-imide compound. The composition comprising said blend retains a surprising degree of ductility as measured by tensile elongation and yield strength and exhibits an improvement in both tensile strength and flexural modulus.

Abstract: The instant invention relates to a process for the preparation of linear aromatic polycarbonate resins by the known two-phase interfacial process and is directed to the use of perfluoroalkyl sulfonamides as chain stoppers in said process and is further directed to the polycarbonate resins obtainable by the process which resins are suitable in the preparation of thermoplastic molding compositions.

Abstract: The present invention is directed to derivatives of azoles, their preparation and their use as chemical blowing agents for thermoplastic molding compositions. The agents of the invention are characterized in their improved compatibility with the resin wherein they are incorporated.

Abstract: The present invention is directed to an aromatic copolycarbonate molding composition comprising the reaction product of an aromatic diphenol, an aromatic sulfonyl diphenol, a dihydroxybiphenyl and a carbonic acid derivative, said composition being characterized by its improved heat deflection temperature and critical thickness.

Abstract: Process for the conditioning of a pigment by applying shear to a crude pigment in the presence of a liquid conditioning agent selected from the group consisting of corn syrup, corn syrup solids and molasses and optionally in the presence of a viscosity modifying agent, in a medium which is essentially free from an added inorganic salt.

Abstract: Polyethylene terephthalate moulding compositions which contain delaminated kaolin may be processed into highly-reflecting objects.

Abstract: The present invention is directed to a thermoplastic molding composition comprising a blend of a thermoplastic aromatic polycarbonate resin, a graft elastomer, a polyanhydride and glass fibers, said composition is characterized by its improved impact performance.

Abstract: Polycarbonate compositions comprising an aromatic polycarbonate resin, wherein dispersed are silicate particulates, are particularly suitable for the preparation of films having a low coefficient of static friction, high light transmission and virtual freedom from haze.

Abstract: A flame resistant polycarbonate blend comprising an alkylated aromatic polycarbonate and a sulfur-bearing compound characterized in exhibiting V-0 flame resistance classification, according to UL-94, is provided. Further provided is a process for the preparation of such blend.

Abstract: The present disclosure is concerned with new modifications of the dyestuff Color Index Acid Blue 324 which have significant advantages over the known form of this dyestuff. In particular, the preferred modification is much easier to isolate from an aqueous medium by filtration and the isolated product has a higher purity. The filtration proceeds much more rapidly and gives a filter residue of a much higher solids content. Furthermore, this new form of the dyestuff imparts a dramatically lower viscosity to aqueous dispersions or slurries prepared from it than are obtained using the old form of this dyestuff. These modifications are obtained by heating an aqueous dispersion or slurry of the known form of Color Index Acid Blue 324 to temperatures in excess of about 97.degree. C. and for the preferred form in the presence of a substance which reduces the surface tension between the dispersed organic dyestuff phase and the aqueous dispersing medium.

Abstract: A thermoplastic molding composition is described comprising a blend of a polycarbonate, a certain graft polymer and polymeric acidifying agent which composition is characterized by its improved stability and impact strength.

Abstract: The present invention relates to the preparation of aromatic polycarbonates by the known two-phase interface process, from diphenols characterized in that aromatic sulfonanilides are used as chain terminators in amounts of about 2 mol % to 20 mol %, preferably in amounts of about 2.5 mol % to 10 mol %, relative to mols of diphenols employed. In addition, the present invention relates to the aromatic polycarbonates obtainable by the process according to the invention. The products of this invention have been found to have better self extinguishing property compared to polycarbonates without sulfonamide end groups.

Abstract: The present disclosure is concerned with aqueous dispersions of anionic acid dyes, especially the monosulphonated level dyeing acid dyes, which have low room temperature, low shear viscosities and good storage stability. This low viscosity enables them to be readily poured, pumped and otherwise handled. These dispersions comprise dyestuff solids with a controlled particle size distribution having a median value between about 1 and 10 microns; an anionic dispersant; and an electrolyte. In a preferred embodiment the pH is adjusted to give an optimum viscosity value. Another preferred feature is the adjustment of the rheology with a thickening agent such as xanthan gum. These dispersions find particular utility in the continuous dyeing of carpet, especially in Kuesters or foam dyeing equipment.

Abstract: Thermoplastic compositions comprising a polycarbonate resin, a graft copolymer and conductive particles are provided suitable for the preparation of molded articles characterized in that they provide an improved level of EMI shielding.

Abstract: The present invention relates to the novel monomer 4,4'-bis(4-hydroxyphenyl thio)biphenyl, to a process for its production and to its use in the preparation of polycarbonates, polyurethanes, polyesters, polysulfones and polyethers which polymer resins are useful in the preparation of films, fibers and molded parts.

Abstract: The present invention relates to a process for the preparation of coatings using a coating compound based on a system comprising (i) an isocyanate prepolymer based on isophorone diisocyanate and polyalkylene ether polyols having a hydroxyl functionality of 2 to 3 and (ii) at least one diprimary aromatic diamine having at least one alkyl substituent with 2 to 3 carbon atoms in an ortho-position to each amino group.

Abstract: The present invention is directed to a polycarbonate composition comprising finely divided silica which composition is characterized by low gloss.