Abstract: The invention relates to a composition comprising a plastic and an additive, the additive being present in a dendrimer having functional end groups, said functional end groups being provided, at least in part, with a modifying group, which modifying group is compatible with the plastic. The additive remains trapped in the dendrimer and, owing to the presence of the modifying group on the dendrimer, cannot migrate or bleed from the plastic.

Abstract: A process for doping polyaniline powder includes: mixing a drying agent with a dopant selected from the group consisting of alkyl sulfuric acid, alkyl sulfonic acid and alkyl benzene sulfonic acid so as to remove water contained in the dopant; and blending the dried dopant and the polyaniline powder in the presence of an additive which is selected from the group consisting of phosphoric acid, hydrochloric acid, nitric acid and acetic acid in order to form a doped product.

Abstract: The invention relates to a process for preparing blends of high-performance polymers. The particular features are that at least two single-type polymers are treated with a solvent or a solvent mixture in which the polymers used are soluble, the polymers are thereby dissolved, and are then precipitated in a liquid medium, and recycled material is used for each of the polymeric constituents.

Abstract: Formulations which have been developed for topical or local delivery intrapelvically, intraperitoneally or directly on reproductive organs of interest administration to a region such as the female reproductive system, provide for increased comfort, increased bioavailability, rapid and relatively high blood levels in the regions to be treated in the substantial absence of systemic levels of drug which might cause side effects. These formulations consist of drug micro or nanoparticles, which may be formed of drug alone or in combination with an excipient or polymeric carrier. The excipient or polymer may be used to manipulate release rates and to increase adhesion to the affected region. The particulate formulation can be applied as a dried powder, a liquid suspension or dispersion, or as a topical ointment, creme, lotion, foam or suppository.

Abstract: A branched alkenyl functional polyester of a prepolymer having at least one carboxyl and at least three hydroxyl groups, which is made allylfunctional by reaction between at least one of said hydroxyl groups in the prepolymer and at least one monomeric or polymeric compound having at least one allylic unsaturation. The prepolymer is a condensation product obtained by condensing at least one monomer selected from the group consisting of di, tri or polyhydroxyfunctional monocarboxylic acids having 2-18 carbon atoms optionally followed by further chain extension by addition of at least one monohydroxyfunctional monocarboxylic acid or corresponding lactone having 2-24 carbon atoms.

Abstract: According to this invention, the prior art problem that relatively many steps and a long time are required for obtaining a high quality polycarbonate of a high molecular weight by a solid phase polymerization method has been solved by subjecting a polycarbonate oligomer to swollen solid phase polymerization under an atmosphere containing a swelling solvent gas or subjecting a polycarbonate oligomer to poor solvent solid phase polymerization under a stream of a poor solvent gas.

Abstract: Deaggregated substituted and unsubstituted polyparaphenylenes, polyparaphenylevevinyles, polyanilines, polyazines, polythiophenes, poly-p-phenylene sulfides, polyfuranes, polypyrroles, polyselenophene, polyacetylenes formed from soluble precursors and combinations thereof and copolymers thereof and methods of fabrication are described. The deaggregated polymer molecules when subsequently doped show higher electrical conductivity. Agents such as lithium chloride, m-cresol and nonylphenol are used to deaggregate the polymer molecules. The deaggregating agents can be added prior to or during doping the molecules.

Abstract: A laser-sinterable powder product has been prepared having unique properties which allow the powder to be sintered in a selective laser sintering machine to form a sintered part which is near-fully dense. For most purposes, the sintered part is indistinguishable from another part having the same dimensions made by isotropically molding the powder. In addition to being freely flowable at a temperature near its softening temperature, a useful powder is disclosed that has a two-tier distribution in which substantially no primary particles have an average diameter greater than 180 .mu.m, provided further that the number average ratio of particles smaller than 53 .mu.m is greater than 80%, the remaining larger particles being in the size range from 53 .mu.m to 180 .mu.m. A powder with slow recrystallization rates, as evidenced by non-overlapping endothermic and exothermic peaks in their differential scanning calorimetry characteristics for scan rates of on the order of 10.degree. C. to 20.degree. C.

Abstract: Polyesters are described which are substantially the condensation products of at least one dicarboxylic acid, at least one volatile diol and at least one hydroxyl-functional component with functionality greater than 2 which controls ultimate viscosity. The products are suitable vehicles for the formulated thixotropic gels for centrifugal separation of fluids such as serum into high and low density components of, for example, separation of mixtures of cells on the basis of density.

Abstract: There is provided a polycarbonate resin with a reduced volatile chlorine content in which the amount of a chlorinous matter as volatilized from the resin when the resin is heated at 280.degree. C. for 30 minutes and then allowed to stand at room temperature for 3 days is 30 ppb or lower as calculated in terms of the amount of Cl atom. There is also provided a process for producing a polycarbonate resin using phosgene as a raw material, the improvement comprising using phosgene having a chlorine concentration of up to 1,000 ppb as the raw material thereby to provide the resin with a reduced volatile chlorine content.

Abstract: A first embodiment comprises reacting PSI with polyhydrazide selected from the group consisting of dihydrazides and trihydrazides and mixtures thereof, subsequently hydrolyzing the crosslinked PSI with base to produce crosslinked polyaspartate. A second embodiment comprises reacting PSI with hydrazine to form an intermediate product which is reacted with polyacyl chloride or polyester to produce crosslinked PSI followed by hydrolysis to form crosslinked salt. Isolation of the intermediate before reaction with the polyacyl chloride or polyester is unnecessary.

Abstract: Dual cure organotin salts of strong organic acids, the use of such salts as catalysts and an improved process for producing the catalysts are provided. The catalysts are capable of effectively catalyzing esterification and transesterification reactions and urethane, silicone, melamine, ester and acrylic forming reactions and can simultaneously catalyze more than one reaction in a mixture of urethane, silicone, amino, ester and acrylic polymer forming reactants to produce a polymer mixture.

Abstract: The present invention relates to a substantially dry, disposable, personal cleansing product useful for both cleansing and conditioning the skin or hair. These products are used by the consumer by wetting the dry product with water. The product comprises of a water insoluble substrate, a lathering surfactant, and an oil soluble conditioning agent. The invention also encompasses methods for cleansing and conditioning the skin or hair using these products and to methods for manufacturing these products.

Abstract: The invention relates to a method for removing bile salts from a patient in need thereof and compositions useful in the method. The method comprises administering to the patient a therapeutically effective amount of an alkylated and crosslinked polymer. The alkylated and crosslinked polymer comprises the reaction product of polymers, or salts and copolymers thereof having amine containing repeat units, with at least one aliphatic alkylating agent and a crosslinking agent.

Abstract: A process for preparing hydroxyl-containing polymers and, in particular, a process for preparing polytetrahydrofuran with terminal hydroxyl groups from the corresponding acyloxy-containing polymers by transesterification with alcohols is carried out continuously in at least one stirred vessel, with the foam produced in the transesterification being fed tangentially to a cylindrical container, preferably a cyclone separator, at an adequate velocity to destroy the foam. The liquid phase which separates out is recycled through a line to the at least one stirred vessel.This continuous process is preferably carried out in a cascade of stirred vessels, in which each stirred vessel or a subunit of at least two stirred vessels can in each case be coupled to a cylindrical container, preferably in the form of a cyclone separator.

Abstract: The invention relates to W/O lotions having a content of at least one unsaturated fatty acid derivative, which are characterized in that they comprise W/O emulsifiers, W/O stabilizers and/or W/O emulsion systems chosen from the group consisting of(A) a W/O emulsifier based on ethoxylated castor oil,(B) a W/O emulsifier (B1) based on sorbitan isostearate and a W/O stabilizer (B2) based on a polyalkylene glycol copolymer and(C) a W/O emulsion system based on a methoxy-polyalkylene glycol copolymer, either(1) the W/O emulsifier of (A) being used, or(2) the W/O emulsifier (B1) being used together with the W/O stabilizer B2 (B), or(3) a combination comprising emulsifiers (A) and (B) with (B1) and (B2) being used, where, in each case,(4) the emulsion system (C) can also be used together with (1) or (2) or (3), and water and, if appropriate, additives or auxiliaries.

Abstract: A hydroxycarboxylic acid copolyester of R-stereospecific configuration contains a majority of first repeating units capable of forming a highly crystalline high-melting homopolyester and a minority of second repeating units capable when randomly copolycondensed with said first repeating units of lowering the melting point of said homopolyester and is characterised by one or more of: higher crystalline melting point, shorter crystallising time, higher notched impact strength at age 1 month, as compared with corresponding random polyester, and said majority repeating units in the polyester chain being present in blocks longer than correspond to their over-all molar proportionality. The copolyester may be made by fermentation, controlling the distribution of repeating units by reference to the pattern of feeding substrates corresponding to the respective repeating units.

Abstract: A process for the preparation of a polymer solution comprises the steps of: mixing a polymer with a solvent to swell the polymer in the solvent; cooling the swelled mixture; and then warming the cooled mixture to dissolve the polymer in the solvent. The present invention uses a polymer other than cellulose esters of lower fatty acids to form the polymer solution.

Abstract: A nucleant system for polyhydroxyalkanoates and other thermoplastic polyesters comprises a class of organophosphorous compounds having at least two phosphonic acid moieties. The compounds can be used to effectively increase polymer crystallization rates and result in desirable properties in polymer-derived articles of manufacture, particularly when used in combination with effective nucleating agent solvents, organic metal salts, inorganic metal oxides, metal hydroxides or metal carbonates, and/or weak organic bases.

Abstract: A process for purifying aromatic carbonate polymers, including polycarbonates and polyestercarbonates, is disclosed. Accordingly, a carbonate polymer is an organic solvent is rendered virtually free of low molecular weight components by agitation with aluminosilicate or by passing through layers of such aluminosilicate. The aluminosilicate is subsequently separated off and the carbonate polymer is isolated in known methods.