With Step Of Spraying Or Centrifuging Patents (Class 523/342)
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Patent number: 5462978Abstract: Polymers I comprising from 15 to 80% by weight of monomers of the general formula I ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are each C.sub.1 -C.sub.3 -alkyl, R.sup.4 is C.sub.1 -C.sub.5 -alkyl and X is O or NH, and from 20 to 85% by weight of other monomers capable of undergoing free radical copolymerization are used as assistants in the spray drying of aqueous dispersions of polymers II which differ from the polymers I.Type: GrantFiled: June 6, 1994Date of Patent: October 31, 1995Assignee: BASF AktiengesellschaftInventors: Erich Penzel, Gernot Franzmann, Maximilian Angel, Joachim Pakusch, Bernhard Schuler
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Patent number: 5455342Abstract: A method and apparatus for the modification of the physical properties of polymers through pressure processing techniques. The apparatus is comprised of a piston device which acts on the polymer substrate charged within the confines of a compression chamber. The piston delivers an abrupt pressure change to the substrate for the purpose of effecting the desired modification of physical properties including altered thermal, viscosity, solubility, turbidity and hardness profiles. Predictable characteristics may be imparted to the substrate through variation of pressure duration and intensity as well as the number of piston strokes applied. Modification of the physical properties of starch and gum arabic, in particular, is disclosed.Type: GrantFiled: September 10, 1993Date of Patent: October 3, 1995Inventor: Bruce K. Redding, Jr.
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Patent number: 5399597Abstract: The present invention provides a new and improved method of producing coating materials comprising the steps of providing a first organic material which is solid at room temperature, providing a second organic material which is solid at room temperature and which is substantially different in chemical composition from the first organic material, providing a source of supercritical fluid, providing a first container having a mechanical agitator, providing a second container, introducing the first and second organic materials and the supercritical fluid into the first container and mechanically agitating such materials and the supercritical fluid, and discharging the contents of the first container into the second container so as to collect substantially all of the first and second organic materials in the second vessel, the second container being maintained at a lower pressure than the first container.Type: GrantFiled: April 29, 1994Date of Patent: March 21, 1995Assignee: Ferro CorporationInventors: Frederick S. Mandel, Charles D. Green, Anthony S. Scheibelhoffer
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Patent number: 5395436Abstract: A waterborne wiping stain for wood is provided with an excellent combination of sprayability, lubricity, sag resistance, and holdout by employing a combination of thickeners including hectorite clay, cellulosic thickener, and an associative thickener.Type: GrantFiled: January 28, 1994Date of Patent: March 7, 1995Assignee: PPG Industries, Inc.Inventor: David Setzke
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Patent number: 5216121Abstract: The invention includes a process for facilitating the handling of tacky polymers (specifically amorphous polypropylene and amorphous ethylene propylene copolymers) during their polymerization comprising:a. preparing a mixture of a tacky polymeric material and a carrying phase for said polymeric material at a temperature and pressure sufficient to maintain said carrying phase as a liquid;b. flashing said mixture to a flash pressure low enough to effect vaporization of said carrying phase, as well as autorefrigeration of said polymeric material to its non-tacky, easy-handling temperature range; andc. separating the thus autorefrigerated polymeric product from its carrying phase wherein said carrying phase will dissolve sufficient polymer to form a liquid mixture.The invention also includes an apparatus for carrying out this process.Type: GrantFiled: November 13, 1990Date of Patent: June 1, 1993Inventors: Giuseppe Zanella, deceased, Roberto Zanella, Heir, Zanella, Heir, Vittorio, Marco Zanella, heir, Giuseppe R. Palmese
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Patent number: 5207954Abstract: Thermosettable, coreactable particulate powdereded compositions having particles comprising at least a first copolymer of an olefinically unsaturated monomer having at least one functional group and at least a second copolymer of an olefinically unsaturated monomer having at least one functional group which is reactive with the at least one functional group of the at least first copolymer are disclosed. Methods for making and using these compositions are also disclosed.Type: GrantFiled: June 22, 1992Date of Patent: May 4, 1993Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Jeffrey M. Lewis, Kenneth L. Hoy, Michael J. Greene
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Patent number: 5166227Abstract: High amounts of silicon dioxide are readily incorporated into an emulsion polymerized elastomer by mixing an aqueous dispersion of silicon dioxide with a latex of the emulsion polymer and subsequently spray drying the mixture. Free flowing, fine-size (e.g., less than 500 micrometers) particles are produced with generally complete incorporation of silicon dioxide. The presence of the silicon dioxide permits rubbers with low gel and/or low Mooney viscosity to be spray dried whereas previously this could not be accomplished. Compared to conventional means of adding a silica to a bale rubber, the above powdered masterbatch gives shorter mixing times with lower power consumption with improved physical properties, such as tensile strength.Type: GrantFiled: November 29, 1990Date of Patent: November 24, 1992Assignee: Zeon Chemicals USA, Inc.Inventors: Charles C. Raines, Philip H. Starmer
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Patent number: 5049594Abstract: There is disclosed a process for preparing an organic polymer composition which includes an inorganic filler, which comprises: (i) treating an inorganic filler by adding to a particulate white inorganic material a natural or synthetic latex composition which comprises a suspension of polymer particles in water wherein the latex solids are selected from the group consisting of acrylic copolymers and vinyl acetate copolymers, and dewatering and drying the resultant mixture, the amount of the natural or synthetic latex composition added being such as to provide from 1% to 10% by weight of latex solids based on the weight of dry inorganic material; and (ii) combining the treated inorganic filler with an organic polymer. Also disclosed is an organic polymeric composition comprising an organic polymer and an inorganic filler.Type: GrantFiled: January 17, 1990Date of Patent: September 17, 1991Assignee: ECC International LimitedInventor: David G. Jeffs
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Patent number: 5028482Abstract: A process for preparing an inorganic filler comprises admixing a particulate inorganic material with a natural or synthetic latex composition and an aqueous suspension of fine carbon black, and dewatering and drying the resultant mixture, the amount of the natural or synthetic latex composition added being such as to provide a coating on the inorganic mineral of from 1% to 10% by weight of latex solids based on the weight of dry inorganic material.Type: GrantFiled: September 6, 1989Date of Patent: July 2, 1991Assignee: ECC International LimitedInventor: David G. Jeffs
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Patent number: 5017630Abstract: High amounts of silicon dioxide are readily incorporated into an emulsion polymerized elastomer by mixing an aqueous dispersion of silicon dioxide with a latex of the emulsion polymer and subsequently spray drying the mixture. Free flowing, fine-size (e.g., less than 500 micrometers) particles are produced with generally complete incorporation of silicon dioxide. The presence of the silicon dioxide permits rubbers with low gel and/or low Mooney viscosity to be spray dried whereas previously this could not be accomplished. Compared to conventional means of adding a silica to a bale rubber, the above powdered masterbatch gives shorter mixing times with lower power consumption with improved physical properties, such as tensile strength.Type: GrantFiled: August 17, 1989Date of Patent: May 21, 1991Assignee: Zeon Chemicals USA, Inc.Inventors: Charles C. Raines, Philip H. Starmer
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Patent number: 5017631Abstract: Powders of an emulsion polymer having reduced fines and exhibiting low dusting are made by spray drying an emulsion of a polymer having a Vicat softening temperature above 60.degree. C., said emulsion containing an external plasticizer having a boiling point of at least 150.degree. C.Type: GrantFiled: December 26, 1989Date of Patent: May 21, 1991Assignee: Rohm GmbHInventors: Hubert Rauch, Peter J. Arndt, Wolfgang Klesse, Wilhelm Krall, Klaus Frank
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Patent number: 4892910Abstract: Polymer powders comprising aggregated polymer particles, said powders having a low content of fines and being suitable as processing aids in the manufacture of polyvinyl chloride, are made by spray drying an aqueous dispersion (latex) of two emulsion polymers, one of which has a dynamic glass transition temperature above 90.degree. C. and the other of which has a dynamic glass transition below 105.degree. C., the latter being at least 10 K. degrees below the former.Type: GrantFiled: July 13, 1988Date of Patent: January 9, 1990Assignee: GmbH RohmInventors: Wolfgang Klesse, Hubert Rauch, Peter J. Arndt, Norbert Suetterlin
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Patent number: 4892932Abstract: The formation of interfering polymer deposits in spary drying apparatus during the spray drying of aqueous dispersions or solutions of polymers in a stream of warm air is avoided if water is atomized together with the dispersion or solution.Type: GrantFiled: February 24, 1989Date of Patent: January 9, 1990Assignee: Rohm GmbHInventors: Hubert Rauch, Peter J. Arndt
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Patent number: 4816558Abstract: A method for obtaining redispersible powders of a copolymer having a dynamic glass transition temperature, T.sub.max, below 150.degree. C., by spray drying an aqueous dispersion thereof having a minimum film forming temperature, MFT, using an inlet temperature T.sub.i and an outlet temperature T.sub.o such that MFT<T.sub.i <T.sub.max and MFT<T.sub.o <65.degree. C.Type: GrantFiled: July 27, 1987Date of Patent: March 28, 1989Assignee: Rohm GmbHInventors: Hubert Rauch, Wolfgang Klesse, Klaus Lehmann, Theodor Mager
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Patent number: 4800103Abstract: A process for preparing an inorganic filler comprising treating a particulate inorganic material with a natural or synthetic latex composition and dewatering and drying the resultant mixture. The surface-treated inorganic filler can be used with advantage in a polymeric resin composition.Type: GrantFiled: August 29, 1986Date of Patent: January 24, 1989Assignee: ECC International LimitedInventor: David G. Jeffs
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Patent number: 4774271Abstract: The invention relates to a process for the recovery of thermoplastic polymers from aqueous dispersions by spray-drying after treatment with carboxylic acid of formula I ##STR1## wherein X is a single bond, --CH.sub.2 -- or --C.sub.2 H.sub.Type: GrantFiled: February 9, 1987Date of Patent: September 27, 1988Assignee: Bayer AktiengesellschaftInventors: Christian Lindner, Pol Bamelis, Jurgen Hinz, Dieter Wittmann, Otto Koch, Burkhard Braun
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Patent number: 4547428Abstract: A terpolymer comprising repeating units derived from an olefin, a diester of an addition polymerizable unsaturated dicarboxylic acid, and a solubilizing monomer which promotes compatibility between the terpolymer and a vinyl halide polymer. A granular form of the processing aid and a method for its preparation are also disclosed.Type: GrantFiled: March 21, 1983Date of Patent: October 15, 1985Assignee: Monsanto CompanyInventors: Vladimir Bekker, Wayne J. Buchheim, William Vanderlinde, Donald S. T. Wang
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Patent number: 4433076Abstract: What are disclosed are methods for making a suspension suitable for use as a coating agent for medicaments by suspending a powder of certain vinyl copolymers in an aqueous solution or suspension of a plasticizer therefor, methods for converting such a suspension of copolymer in plasticizer into a film-forming solution or other extensively homogeneous phase, such suspensions and the film-forming conversion products thereof, and methods for coating medicaments with such suspensions and film-forming conversion products.Type: GrantFiled: December 8, 1981Date of Patent: February 21, 1984Assignee: Rohm GmbHInventors: Kurt H. Bauer, Hermann Osterwald, Klaus Lehmann, Dieter Dreher
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Patent number: 4379871Abstract: There is disclosed a process for the production of a pigment-synthetic resin concentrate containing an organic solvent soluble polymer and carbon black having quicker distributability in organic media such as lacquer binding media, printing inks, etc., such concentrates being especially suitable for the production of molded parts, castings, films and/or synthetic fibers, the process comprising continuously homogenizing in a mixer powdery pigment and powdery synthetic resin jointly with an organic solvent in a given case also containing plasticizer, stabilizer and/or dispersing acid, dispersing the pigment in the mixture, removing the solvent from the dispersion, comminuting the resulting pigment-synthetic resin concentrated and grinding the product.Type: GrantFiled: December 30, 1977Date of Patent: April 12, 1983Assignee: Deutsche Gold- und Silber-Scheideanstalt Vormals RoesslerInventors: Peter Werle, Hans Graf, Erwin Walter