Abstract: A process for the production of a particle composition containing, at least one resin and at least one pigment is described, said process comprising the following steps: •extrusion of a mixture containing said at least one resin and said at least one pigment without induced heating; •subsequent extrusion, with induced heating, of the mixture obtained from the preceding extrusion; •granulation of the mixture thus obtained. With the abovementioned process it is possible to obtain a composition having granules with an average diameter less than 2 microns and a greater homogeneity than the known processes.

Abstract: The in-line repair operations in the automotive industry require high-temperature masking tapes which satisfy a particular profile of requirements. Hence such masking tapes must be temperature-stable and must have a high crosslinking potential. Masking tapes employed are tapes coated with thermally crosslinking natural rubber (NR) adhesives which have a crosslinker resin/phenolic resin component.

Abstract: Drag reduction of hydrocarbon fluids flowing through pipelines of various lengths is improved by polyolefin drag reducer dispersions or dispersions using bi- or multi-modal particle size distributions. Drag reducers having larger particle sizes dissolve more slowly than drag reducers having smaller particle sizes. By using at least bi-modal particle size distributions drag reduction can be distributed more uniformly over the length of the pipeline where smaller sized particles dissolve sooner or earlier in the pipeline and larger sized particles dissolve later or further along the pipeline.

Abstract: The present invention discloses a fabrication method of a basic polymer electrolyte film of blended polyvinyl alcohol and quaternary amine, wherein hydrophilic polyvinyl alcohol and quaternary amine are separately dissolved in a polar organic solvent, and then, the solutions are blended to obtain a glutinous polymeric solution; the glutinous polymeric solution is baked to form a film, and then, the film is soaked in an alkali hydroxide solution to obtain a basic electrolyte-containing solid-state polymer electrolyte film. The basic polymer electrolyte film of the present invention has the characteristics of superior chemical stability, high mechanical strength and high ionic conductivity. When the present invention applies to a zinc-air battery, the utilization rate of zinc is promoted. The basic polymer electrolyte film of the present invention can be widely used in various energy storage systems, such as alkaline battery systems, alkaline fuel cells and capacitors.

Abstract: A white heat-curable silicone/epoxy hybrid resin composition is provided comprising (A) a heat-curable silicone resin, (B) a triazine derived epoxy resin composition, (C) a white pigment, (D) an inorganic filler, and (E) an antioxidant. Antioxidant (E) is a phosphite compound having formula: P(OR1)(OR2)2 wherein R1 and R2 are organic groups of at least 6 carbon atoms. Components (A) and (B) are present in a weight ratio of from 5:95 to 95:5. The composition effectively cures into a product maintaining heat resistance, light resistance and improved strength over a long term.

Abstract: The invention relates to processes for the production of microgel-containing rubber mixtures, to rubber mixtures obtainable by the processes, to processes for the production of vulcanizates, and also to vulcanizates after the vulcanization process, in particular in the form of tires, parts of tires, or industrial rubber items.

Abstract: A method of producing a stable aqueous dispersion of a latex, solid particles and a dispersing agent, comprising contacting the latex with an anionic dispersing agent to form a modified latex, feeding the modified latex and the solid particles to a zone of high shear forces, and simultaneously subjecting essentially all of the modified latex and the solid particles fed to said zone to high shear forces to form a latex-particle slurry. By means of the invention, over 60 wt-% of the latex can be adsorbed on the solids. Latex immobilization increases the surface strength of final coating layer and allows for a decrease of latex consumption in paper and cardboard and paint applications.

Abstract: A polyamic ester (PAE) film, which shows an electro-optic (EO) and nonlinear optical (NLO) properties without a poling process, is prepared. The chromophore in the film seems to be slightly oriented normally to the film surface (transverse magnetic field (TM) direction even though the polymer solution is spin-coated. This is due to the nano-configuration structure of PAE controlled by introducing a designed chemical structure into the monomeric repeating unit of PAE. Manufacturing the relating devices can be simplified by using the self-poled polymer film as a polymer waveguide. Additionally, the EO property of the film is thermodynamically stable.

Abstract: Powder coating materials preparable by (1) mixing at least two liquid components comprising in each case at least one liquid starting product in a static mixer, to give a molecularly disperse and/or finely dispersed liquid mixture, (2) emulsifying the liquid mixture (1) in an aqueous medium in a dispersing unit, to give an aqueous emulsion of liquid particles, (3) cooling the emulsion (2) so that a suspension of dimensionally stable particles is formed, (4) isolating the dimensionally stable particles from the suspension (3) or alternatively (3) isolating the dimensionally stable particles directly from the emulsion (2); and also processes for preparing them and their use as coating materials, adhesives, and sealing compounds or to prepare such compositions.

Abstract: A method of making a thermoplastic composition comprises melt mixing a concentrate comprising a first thermoplastic, a second thermoplastic and an additive with a component selected from the group consisting of a third thermoplastic, fire retardant additive, reinforcing agent, electrically conductive filler, non-electrically conductive filler and combinations of two or more of the foregoing.

Abstract: A process for the continuous production of an aqueous polyurethane dispersion based on at least one aliphatic and/or aromatic polyisocyanate is described, which is characterised by the following steps: a) production of an aqueous pre-emulsion by mixing a polyurethane prepolymer containing hydrophilic and/or potentially hydrophilic groups with water in a mixing nozzle, wherein the polyurethane prepolymer is injected into the water; b) formation of an emulsion by homogenization of the pre-emulsion from step a) in a multi-step homogenizing nozzle. Paint films containing the aqueous polyurethane dispersion produced by the process can be used to coat substrates.

Abstract: A method for making a silicic acid containing rubber base composition includes providing composition ingredients of rubber, silicic acid, silane and additional additives except for vulcanization ingredients. First and second mixers separate from each other are provided wherein the ingredients except for the vulcanization ingredients can be mixed. All of the composition ingredients are introduced into the first mixer except for the vulcanization ingredients simultaneously or at time intervals. The composition ingredients introduced into the first mixer are mixed to a composition. The composition formed in the first mixer is transferred directly into the second mixer without an intermediate storage thereof. The transferred composition formed in the first mixer is mixed at least almost to completion in the second mixer with the temperature lying in the temperature range of 130° C. to 180° C.

Abstract: Provided is a process for producing a thermoplastic resin composition of low specific gravity containing hollow spheres by a melt processing extrusion method, wherein a melt-kneading extruder equipped with a screw is used and the extruder has an upper stream side supplying portion at the upper stream part of the extrusion direction, and a lower stream side supplying portion at the lower stream part from said upper stream side supplying portion, and the ratio (L/D) of the distance (L) between said upper stream side supplying portion and said lower stream side supplying portion to the diameter (D) of a screw is 4-30 (L and D are the same scale units); and under screw rotation, a thermoplastic resin having a specific gravity of 1.10 or more is supplied from the upper stream side supplying portion, and hollow spheres in an amount of 2-50 parts by weight based on 100 parts by weight of the thermoplastic resin are supplied from the lower stream side supplying portion.

Abstract: A heat transfer material includes thermoplastic elastomer such as styrenic block copolymer, oil and fillers, and has a composite heat transfer coefficient greater than 0.8 watts/m-K. The material is easily conformable to irregularly shaped surfaces and has low thermal impedance values less than 0.1K-in2/W at 0.5 MPa mounting pressure. The material has a good dry-out performance of less than 0.15% at 70° C., 240 hours, which are better than the existing thermal conductive grease. More particularly, the material has excellent re-usability.

Abstract: A process of making a pigmented shaped article comprising: (a) providing polytrimethylene terephthalate chips and two or more colored pigmented chips each containing at least one different color pigment; (b) heating the polytrimethylene terephthalate chips and colored pigmented chips to a temperature of about 200-about 280° C. to melt the chips and form a polymer composition comprising the polytrimethylene terephthalate and at least one color pigment; and (c) forming a shaped article from the polymer composition.

Abstract: The present invention relates to easily distributable pigment compositions consisting essentially of pigment and urea-aldehyde resin, wherein the weight ratio of pigment to urea-aldehyde resin is generally in the range of 40:60 to 90:10, a process for their production and their use in pigmenting high molecular weight organic materials. Due to the excellent dispersibility of the pigment compositions of this invention, uniform distribution of pigment particles throughout the entire application media and, therefore, excellent color consistency is readily achieved. Products, for example solvent paints, spread coatings and powder coatings, comprising the stir-in pigment compositions show high color strength, high gloss and low haze as well as very good light fastness and weathering fastness.

Abstract: A process for producing a superabsorbent polymer is described. The process that entails a continuous hydrolysis of an aqueous emulsion of crosslinked or uncrosslinked polyacrylonitrile in the form of fine particles is carried out in a cascade of stirred tanks. The reaction with alkali-hydroxide solution an aqueous-alcoholic medium at 60 to 100° C. yields polymers that are suitable for the preparation of hygiene products, water-storing materials in agriculture, and sheathing of electrical cables.

Abstract: Apparatus and method for preparing microparticles. An emulsion is formed by combining two phases in a static mixing assembly. The static mixing assembly preferably includes a preblending static mixer and a manifold. The emulsion flows out of the static mixing assembly into a quench liquid whereby droplets of the emulsion form microparticles. The residence time of the emulsion in the static mixing assembly is controlled to obtain a predetermined particle size distribution of the resulting microparticles.

Abstract: In a first step, basic components including (A) 100 parts by weight of an organopolysiloxane gum, (B) 5-100 parts by weight of a reinforcing silica filler, and (C) 0.1-30 parts by weight of a processing aid are fed batchwise to a closed mixer for mixing them at a temperature of room temperature to 150.degree. C. In a second step, the mixture is fed into a kneader/mixer for heat treating at a temperature of 150-250.degree. C. The first step achieves quick dispersion and cooperates with the second step to form a heat-curable silicone rubber compound in an efficient manner.

Abstract: A microgel is produced by a two-stage process wherein the monomers are first polymerized in the absence of solvent for a controlled period, and in a second stage solvent is added and polymerization is completed. The polymer is preferably a polyurethane formed from a polyalkylene glycol, a triol and a diisocyanate. The molecular weight is typically 100,000 to 200,000. The microgels form granules which may be compressed into solid form. Such solid forms containing an active agent, such as a protein, are useful as sustained delivery devices.

Abstract: A process of making a polyhydroxyalkanoate PHA latex comprises making a liquid-form solution of such PHA in a water soluble liquid and contacting that solution with water under shear. Suitably the solution is prepared at a temperature between the boiling point of water and 10.degree. C. below the melting point of the PHA as measured by DSC for example by melt separating PHA from a microbiological suspension thereof, dissolving it in the water soluble liquid, and then contacting the solution at over 100.degree. C. with water at 50.degree.-95.degree. C. The water-soluble liquid may be for example 1,2-propandiol or a liquid more volatile than water such as ethanol, propanol or tertiary butanol. A surfactant may be present or added after contacting, for example one providing steric stabilisation such as an acrylic graft copolymer emulsifier.

Abstract: A process for producing a thermoplastic elastomer composition which comprises dynamically cross-linking an olefine copolymer rubber and an olefine plastic using a twin-screw extruder, said process being characterized in that said twin-screw extruder comprises one or more kneading zones within a dynamically cross-linking area and the first kneading zone among said zones comprises a screw with forward kneading disks having a minimum thickness (T.sub.min) of less than 13 mm per disk. Said method enables production of a thermoplastic elastomer composition of good quality regardless of the scale of production.

Abstract: The method for manufacturing rubber mixtures includes the steps of plasticizing batchwise rubber in a first inner kneader to produce a batch of plasticized rubber and transporting the batch of plasticized rubber, while still hot, into a second inner kneader. In the second kneader nonreactive additives are mixed into the batch of plasticized rubber.

Abstract: Process for manufacturing stopping compounds, in particular such as can be used for motor vehicle repair lacquering, in which in a first stage at least 90 wt.-% of the solvents required and 80 to 100 wt.-% of the binding agents required are dispersed together with such a proportion of the pigments and/or extenders as is required in order to ensure that the mixture can be dispersed in a high-speed agitator mill, as well as optionally together with the required additives in a high-speed agitator mill, in particular a bead mill or sand mill, whereupon the dispersed material produced is, in a second stage, mixed with the remaining amounts of pigment and/or extender as well as optionally the remaining amounts of binding agent and solvent and dispersed in a dissolver to the required fineness.

Abstract: Stable aqueous microdispersions of finely divided polyamide resin particles and methods for the manufacture thereof are provided. The properties of these microdispersions are achieved by the addition thereto of an effective amount of a co-surfactant such as a lower alkyl alcohol. The provided microdispersions can be drawn into films which will form clear, continuous films at ambient or near-ambient temperatures regardless of the softening point of the polyamide resin. Dispersions according to this invention find use in hot melt adhesives, coatings, inks, and the like.

Abstract: A method for preparing thermo-crosslinkable and/or thermoplastic elastomer blends by mixing the elastomer with plasticizer oil and other additives, said method comprising the steps of:(a) continuously premixing the crushed elastomer in an annular zone mixer with at least part of said plasticizer oil, and optionally with at least part of said other additives, to form a preblend in which said elastomer is decomposed and said additives are embedded in the polymer matrix;and thereafter(b) completing the mixing of said premix, and optionally of the remainder of said additives, in a mixing unit working batchwise or continuously.

Abstract: A composition including an oil and particles of a solid, water soluble flocculant polymer substantially immiscible with the oil provides ready dispersibility of the polymer in aqueous fluids. Desirably, the composition is substantially free of surfactants, the polymer particles have a mean particle size less than about 100 microns and preferably less than about 20 microns and the polymer particles are substantially dry.

Abstract: The present invention relates to a free radical emulsion polymerization process. The latex is prepared by polymerizing (a) at least one conjugated diene, (b) at least one non-carboxylic vinyl aromatic or aliphatic comonomer selected from the group consisting of styrene, .alpha.-methyl styrene, p-methyl styrene, vinyl toleuene, acrylonitrile, methacrylonitrile, vinylidene chloride, ethyl acrylate, butyl acrylate, vinyl pyridine, methylmethacrylate, hexylacrylate, 2-ethyl hexyl acrylate or mixtures thereof, and (c) at least one ethylenically unsaturated carboxylic acid monomer selected from the group consisting of acrylic acid, methacrylic acid, maleic acid, fumaric acid, 3-carboxyethylacrylate, itaconic acid or mixtures thereof.

Abstract: The method consists of the separate simultaneous extrusion, by means of two or more contiguous extruders or one extruder with two or more separate homogenization chambers, of two or more paints in powder form and the union of the extrusions in the molten state or still hot and then subsequent cooling as a single extrusion.

Abstract: Aqueous dispersions of polyamide resins having improved stability with respect to gelation and phase separation are provided, along with preparative methods therefor. The improved stability of the provided aqueous dispersions is achieved by the addition to such dispersion of a chemical moiety, such as a water soluble, amphoteric amino acid, anionic and cationic salts of amino acid, or mixtures thereof, in aqueous solutions. In a preferred embodiment, a dispersion-stabilizing amount of glycine is added with the inversion water used to invert an emulsion of water in polyamide resin. The resulting emulsion of resin in water is then cooled below the resin's melting point, causing the emulsified droplets of the polyamide resin to solidify as finely divided particles which are dispersed uniformly through the aqueous phase. The stable, aqueous dispersions of this invention are useful in coatings, inks, and as coatings for hot melt adhesive applications.

Abstract: An adhesive paste composition containing in admixture a resin component, a hardener component, a hydrophobic filler component and a curing agent. The resin component includes a polyol having at least two hydroxyl groups and the hardener component includes a liquid polyisocyanate containing at least two isocyanate groups. The admixture may be made by mixing together a premixed resin component containing a filler and a catalyst and a premixed hardener component containing a hydrophobic filler. The filler in the resin component, the hardener component, or both may be a thixotropic agent.

Abstract: A method for the production of polyolefin resins containing both an organic amide and a zinc compound. One composition is prepared which contains the polyolefin and the amide, but which does not contain the zinc compound. Another composition is prepared which contains the polyolefin and the zinc compound, but which does not contain the amide. The two compositions are extruded separately, and the individual resins so obtained are blended to form the desired resin composition containing both the amide and the zinc compound, thereby preventing the zinc stearate from catalyzing the dehydration of the aliphatic amide to a nitrile.

Abstract: A heterogeneous rubber composition having good air impermeability is made by mixing together separate fractions of rubbers and fillers.

Abstract: An improved process for preparing extruded films from film-forming polymeric compositions based on vinylidene chloride copolymers and containing one or more inorganic particulate additives and to the films so prepared. The improvement comprises first preparing a preblend of the inorganic particulate additives and an alkali metal salt of an alkylaryl sulfonic acid and, then making an admixture of the preblend and the vinylidene chloride copolymers. The admixture so prepared is then formed into an extruded film by conventional techniques.

Abstract: A process for preparing a rubber composition for tire treads having resilience, wet skid resistance and wear resistance well balanced with each other, by mechanically mixing a specific amount in total of a halogenated butyl rubber, natural rubber or a polyisoprene rubber and a polybutadiene rubber with a specific amount of carbon black and with other additives in the first mixing step and then mechanically mixing the resulting mixture with the remainder of the rubber ingredients and carbon black in the second mixing step thereby to obtain the rubber composition.

Abstract: A process for preparing a tire tread rubber composition having improved rolling resistance and wet skid resistance comprising [I] 100 parts by weight of a rubber material composed of 25 to 75% by weight of substantially amorphous polybutadiene having a 1,2-bond unit content of 65 to 90 mole % and a Mooney viscosity (ML.sub.1+4, 100.degree. C.) of 20 to 100 and 75 to 25% by weight of natural rubber and/or cis-1,4-polyisoprene, and [II] 40 to 70 parts by weight of carbon black, said process comprising (1) mechanically compounding 40 to 60 parts by weight of the rubber material [I] with 40 to 70 parts by weight of carbon black [II], and then (2) adding to the resulting mixture the rubber material [I] in an amount sufficient to adjust the amount of the carbon black [II] to 40 to 70 parts by weight per 100 parts by weight of the rubber material [I] and mechanically compounding them.