Including Step Of Surface Coating A Particle Or Process Of Expanding A Surface Coated Particle Patents (Class 521/57)
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Patent number: 4863973Abstract: Swollen core/sheath polymeric particles are disclosed having one or more voids in the core formed by reaction with a base such as sodium hydroxide. The sheath contains styrene or similar monomer polymerized in an amount greater than 25 mole percent and the polymer is free of acid groups. The core contains acid groups. Swelling is effected at an elevated temperature and in the absence of an organic solvent.The swollen particles on drying in a paint or other composition have air in the voids and act then as opacifying agents.Type: GrantFiled: July 13, 1988Date of Patent: September 5, 1989Assignee: Tioxide Group PLCInventors: Gerald K. Chip, Alfred Rudin
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Patent number: 4843104Abstract: Microsphere wet cake is mixed with a processing aid efective to prevent agglomeration and surface bonding of the microspheres, and thereafter removing water by drying with continuous mixing, optionally also under reduced pressure, i.e. vacuum drying. By the control of the application of heat and balancing temperature and the mixing, and optionally also the reduced pressure, it is possible to also control expansion of the microspheres from substantially none to substantially theoretical limits of expansion.The processing aid in the present invention is any one of a wide diversity of materials which meet the requirements of the intended function, i.e., to prevent the agglomeration of the microspheres during the process. Suitable materials include, by way of example, dry inorganic pigments or filler materials, and the like, and related organic materials.Type: GrantFiled: November 25, 1987Date of Patent: June 27, 1989Assignee: Pierce & StevensInventors: George E. Melber, William A. Oswald, Leon E. Wolinski
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Patent number: 4829094Abstract: Microsphere wet cake is mixed with a processing aid effective to prevent agglomeration and surface bonding of the microspheres, and thereafter removing water by drying with continuous mixing, optionally also under reduced pressure, i.e. vacuum drying. By the control of the application of heat and balancing temperature and the mixing, and optionally also the reduced pressure, it is possible to also control expansion of the microspheres from substantially none to substantially theoretical limits of expansion.The processing aid in the present invention is any one of a wide diversity of materials which meet the requirements of the intended function, i.e. to prevent the agglomeration of the microspheres during the process. Suitable materials include, by way of example, dry inorganic pigments or filler materials, and the like, and related organic materials.Type: GrantFiled: November 25, 1987Date of Patent: May 9, 1989Assignee: Pierce & Stevens Corp.Inventors: George E. Melber, William A. Oswald, Leon E. Wolinski
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Patent number: 4808448Abstract: Substantially static-free, cellular expanded or foamed thermoplastic articles, including cups and containers, and processes for the manufacture of these articles including the manufacture of intermediate materials suitable for use in such manufacture.Type: GrantFiled: December 11, 1985Date of Patent: February 28, 1989Assignee: Roboserve LimitedInventor: Harold S. Cox
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Patent number: 4792572Abstract: Particulate expandable styrene polymers are coated with a distilled acetylated monoglyceride product to reduce the cooling time of articles molded from such expandable styrene polymers. Coating of the expandable particulate styrene polymer is obtained by contacting the polymer with an emulsion of a distilled acetylated monoglyceride and water with a suitable surfactant. The distilled acetylated monoglyceride is a liquid at room temperature and is substantially completely acetylated.Type: GrantFiled: February 25, 1988Date of Patent: December 20, 1988Assignee: Texstyrene Plastics, Inc.Inventors: Thomas B. White, James J. Uebelhart
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Patent number: 4785022Abstract: Various rubber polymers and copolymers have been added as a coating to seed beads of vinyl aromatic polymers. Cups molded from these beads were coffee leak tested and generally exhibited enhanced retention of coffee.Type: GrantFiled: October 29, 1987Date of Patent: November 15, 1988Assignee: Arco Chemical CompanyInventors: Fred M. Sonnenberg, Dennis M. Hajnik
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Patent number: 4781983Abstract: Quaternary ammonium salts which act as antistatic agents for styrene polymers are coated on the expandable polymer particles in the form of an organosol. The hydrocarbon medium from the organosol is removed under vacuum and the coated polymer particles are molded.Type: GrantFiled: January 19, 1988Date of Patent: November 1, 1988Assignee: Arco Chemical CompanyInventor: Susan G. Stickley
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Patent number: 4771081Abstract: Substantially static-free, cellular expanded or foamed thermoplastic articles, including cups and containers, and processes for the manufacture of these articles including the manufacture of intermediate materials suitable for use in such manufacture.Type: GrantFiled: January 20, 1987Date of Patent: September 13, 1988Assignee: Roboserve LimitedInventor: Harold S. Cox
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Patent number: 4765934Abstract: Polystyrene beads or beads of other thermoplastic material are expanded to a consolidated foam structure in a hollow cavity of a marine float or other structure by providing the beads with a uniform coating of a saturated brine solution or other aqueous solution of water-soluble salt and exposing the solution to microwave energy to boil the solutioln and thereby heat the beads to cause expansion and fusion to a foam structure.Type: GrantFiled: August 19, 1987Date of Patent: August 23, 1988Assignee: Dominion Al-Chrome CorporationInventors: Steven E. Nazar, Jacob Leidner, Ferdinand M. Svirklys
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Patent number: 4757091Abstract: Porous particles of vinyl resin are disclosed where said particles are non-spherical in shape, highly porous, skinless and friable. Processes are also disclosed for producing these novel particles. The particles are preferably PVC and exhibit an ability to absorb large amounts of plasticizer in a short time.Type: GrantFiled: October 6, 1987Date of Patent: July 12, 1988Assignee: The B.F. Goodrich CompanyInventor: Roman B. Hawrylko
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Patent number: 4755539Abstract: Porous particles of vinyl resin are disclosed where said particles are non-spherical in shape, highly porous, skinless and friable. Processes are also disclosed for producing these novel particles. The particles are preferably PVC and exhibit an ability to absorb large amounts of plasticizer in a short time.Type: GrantFiled: October 6, 1987Date of Patent: July 5, 1988Assignee: The B. F. Goodrich CompanyInventor: Roman B. Hawrylko
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Patent number: 4755538Abstract: Porous particles of vinyl resin are disclosed where said particles are non-spherical in shape, highly porous, skinless and friable. Processes are also disclosed for producing these novel particles. The particles are preferably PVC and exhibit an ability to absorb large amounts of plasticizer in a short time.Type: GrantFiled: October 6, 1987Date of Patent: July 5, 1988Assignee: The B. F. Goodrich CompanyInventor: Roman B. Hawrylko
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Patent number: 4746706Abstract: Polyolefin particles having a halogenated surface region, which are prepared by irradiating ultraviolet rays to an aqueous dispersion of polyolefin particles in the presence of a halogen gas. The polyolefin particles having a halogenated surface region have an improved property of retaining volatile blowing agents and can provide expandable particles having an improved storability in the open state.Type: GrantFiled: March 2, 1987Date of Patent: May 24, 1988Assignee: Kanegafuchi Kagaku Kogyo Kabushiki KaishaInventor: Masao Nakagawa
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Patent number: 4742085Abstract: Porous particles of crosslinked PVC are disclosed. the particles are skinless and have a fast powder mix time. Processes to produce the novel particles are also disclosed.Type: GrantFiled: April 14, 1987Date of Patent: May 3, 1988Assignee: The B. F. Goodrich CompanyInventor: Ross J. Cozens
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Patent number: 4722943Abstract: Microsphere wet cake is mixed with a processing aid effective to prevent agglomeration and surface bonding of the microspheres, and thereafter removing water by drying with continuous mixing, optionally also under reduced pressure, i.e. vacuum drying. By the control of the application of heat and balancing temperature and the mixing, and optionally also the reduced pressure, it is possible to also control expansion of the microspheres from substantially none to substantially theoretical limits of expansion.The processing aid in the present invention is any one of a wide diversity of materials which meet the requirements of the intended function, i.e., to prevent the agglomeration of the microspheres during the process. Suitable materials include, by way of example, dry inorganic pigments or filler materials, and the like, and related organic materials.Type: GrantFiled: March 19, 1987Date of Patent: February 2, 1988Assignee: Pierce & Stevens CorporationInventors: George E. Melber, William A. Oswald, Leon E. Wolinski
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Patent number: 4720429Abstract: Enhanced coffee retention properties are achieved in thermoplastic polymer foam cups molded from thermoplastic polymer particles by coating at least a portion of the surfaces of the particles before molding with a fluorosurfactant.Type: GrantFiled: May 15, 1987Date of Patent: January 19, 1988Assignee: Atlantic Richfield CompanyInventor: Fred M. Sonnenberg
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Patent number: 4715961Abstract: A urea adsorbent and a method for its production are disclosed, the adsorbent comprising hollow microspheres each having an outer layer formed of a urea-permeable polymer and an inner layer formed of a polymer containing a polyoxyalkylene glycol derivative expressed by the following formula:--(CH.sub.2).sub.n -O--.sub.m Rwherein R stands for hydrogen or a methyl group and n is an integer of 2-5 and m is an integer of at least 3. The adsorbent can selectively adsorb urea with a high adsorbing activity and does not interact with other substances than urea and, therefore, is useful as a artificial kidney. The adsorbent may be prepared by subjecting a w/o/w type emulsion to polymerization wherein a radical polymerizable polyoxyalkylene glycol derivative is dissolved in the inner aqueous phase of the emulsion and an oil-soluble radical polymerizable monomer is used as the outer oil phase.Type: GrantFiled: March 10, 1987Date of Patent: December 29, 1987Assignees: Research Dev. Corp. of Japan, Kao CorporationInventor: Masayuki Mishima
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Patent number: 4711908Abstract: Porous particles of vinyl resin are disclosed where said particles are non-spherical in shape, highly porous, skinless and friable. Processes are also disclosed for producing these novel particles. The particles are preferably PVC and exhibit an ability to absorb large amounts of plasticizer in a short time.Type: GrantFiled: April 14, 1987Date of Patent: December 8, 1987Assignee: The B. F. Goodrich CompanyInventor: Roman B. Hawrylko
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Patent number: 4704130Abstract: A microporous biocompatible material is formed by preparing a segmented polyether urethane urea solution containing 25%.+-.1.5% solids dissolved in a solvent. The solution has sufficient viscosity to be preshaped and formed into the desired thickness of the finished article, then immediately immersed into a precipitation bath in which the solvent in the solution is miscible for a time interval sufficient to cause the solution to set up into an opaque elastomeric article. The article is immediately removed from the bath, any excess solvent extracted and then dried at a temperature on the order of 35.degree. C. to 70.degree. C. followed by heat treating by annealing for approximately sixty minutes at a temperature at 100.degree. C. to 130.degree. C. The void volume of the membrane solution is controlled to within the 50% to 80% range and the pore size from ca <0.1 to several mms.Type: GrantFiled: October 18, 1985Date of Patent: November 3, 1987Assignee: Mitral Medical, International, Inc.Inventors: D. Keith Gilding, Andrew M. Reed, Ian N. Askill, Stephen G. Briana
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Patent number: 4703066Abstract: Polyolefin particles having a halogenated surface region, which are prepared by irradiating ultraviolet rays to an aqueous dispersion of polyolefin particles in the presence of a halogen gas. The polyolefin particles having a halogenated surface region have an improved property of retaining volatile blowing agents and can provide expandable particles having an improved storability in the open state.Type: GrantFiled: March 2, 1987Date of Patent: October 27, 1987Assignee: Kanegafuchi Kagaku Kogyo Kabushiki KaishaInventor: Masao Nakagawa
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Patent number: 4703065Abstract: Enhanced coffee retention properties are achieved in thermoplastic polymer foam cups molded from thermoplastic polymer particles by coating at least a portion of the surfaces of the particles before molding with a fluorosurfactant.Type: GrantFiled: February 5, 1987Date of Patent: October 27, 1987Assignee: Atlantic Richfield CompanyInventor: Fred M. Sonnenberg
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Patent number: 4698367Abstract: Expandable thermoplastic resin particles comprising a thermoplastic resin and a hydrocarbon having the lower boiling point than the softening point of the thermoplastic resin in which a copolymer composed of a fluorinated vinyl polymer part and a hydrophilic vinyl polymer part covers or is included on the surface or in the surface layer of the expandable thermoplastic particle, said resin particles are useful for producing package vessels and containers for oily or fatty foods.Type: GrantFiled: December 30, 1986Date of Patent: October 6, 1987Assignees: Sekisui Kaseihin Kogyo Kabushiki Kaisha, Nippon Oil and Fats Co., Ltd.Inventors: Toshiki Ikeda, Yoshitugu Beppu, Takashi Yamamoto, Hideyo Ishigaki, Hiroshi Ohmura
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Patent number: 4696950Abstract: Substantially static-free, cellular expanded or foamed thermoplastic articles, including cups and containers, and processes for the manufacture of these articles including the manufacture of intermediate materials suitable for use in such manufacture.Type: GrantFiled: December 11, 1985Date of Patent: September 29, 1987Assignee: Roboserve LimitedInventor: Harold S. Cox
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Patent number: 4686239Abstract: A composition comprising a dry blend mixture of a porous thermoplastic resin powder and from 1 to 80 wt. % of a microbiocide based upon the weight of the composition. The microbiocide is present in the mixture at a concentration of at least about 20 times greater than the normal upper usage concentration of the microbiocide, and is held within the pores of the thermoplastic powder.The resulting concentrate is a substantially non-dusting, free-flowing powder which is readily incorporated into a second thermoplastic resin to produce a resulting article having the appropriate level of microbiocide.Type: GrantFiled: December 4, 1986Date of Patent: August 11, 1987Assignee: Morton Thiokol, Inc.Inventor: Nuno M. Rei
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Patent number: 4681779Abstract: Expandable styrene polymer particles which have anti-static and anti-lumping properties during expansion are produced by adding 0.1 to 0.4 parts of alkyl and alkylaryl ethers of polyethoxyethanol mono- and diesters of phosphoric acid per 100 parts of polymer particles during impregnation of the polymer particles with blowing agents. The esters may be added as sole antistatic agent or in addition to the known internal additives which impart fast-cool and antilump properties.Type: GrantFiled: October 25, 1985Date of Patent: July 21, 1987Assignee: Atlantic Richfield CompanyInventor: Alvin R. Ingram
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Patent number: 4673694Abstract: Thermoplastic particles are suspended in water or other suspending fluids with a suspending aid(s) to prevent agglomeration of the beads, pellets or particles. To this suspension is added monomer(s) containing a multifunctional initiator(s). The monomer and initiator(s) are preemulsified in water or other fluid(s) before the addition in order to improve distribution of the monomer(s) and initiator(s) in or on the particles. After or during the addition(s), the suspension temperature is raised to cause polymerization. The procedures may be repeated to increase the coating or penetrated polymer content. New compositions of matter are made by this technique wherein the new compositions are plastic resins either coated or penetrated, or both, with a thermoplastic(s) of very high molecular weight not obtainable by present, commercial polymerization techniques. The compositions are superior to the feed resins because of the enhancement of physical properties brought about by the high molecular weights phase(s).Type: GrantFiled: October 3, 1986Date of Patent: June 16, 1987Assignee: Atlantic Richfield CompanyInventors: Bernard H. Meyer, Adolph V. DiGiulio, Joseph C. Kinslow, Dennis M. Hajnik
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Patent number: 4670513Abstract: Styrenic polymer beads that are useful in forming foamed cups with improved strength and thermal properties are prepared by forming an aqueous suspension of initial styrenic polymer beads and adding thereto an emulsion of a comonomer solution of styrenic monomer and divinylbenzene, which emulsion also contains free-radical-producing catalysts, and the suspension with added monomers is heated to copolymerize the styrenic monomer and divinylbenzene within and on the initial beads and form modified beads.Type: GrantFiled: July 7, 1986Date of Patent: June 2, 1987Assignee: Atlantic Richfield CompanyInventor: Adolph V. DiGiulio
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Patent number: 4665102Abstract: Polyolefin particles having a halogenated surface region, which are prepared by irradiating ultraviolet rays to an aqueous dispersion of polyolefin particles in the presence of a halogen gas. The polyolefin particles having a halogenated surface region have an improved property of retaining volatile blowing agents and can provide expandable particles having an improved storability in the open state.Type: GrantFiled: May 5, 1986Date of Patent: May 12, 1987Assignee: Kanegafuchi Kagaku Kogyo Kabushiki KaishaInventor: Masao Nakagawa
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Patent number: 4665103Abstract: Styrenic polymer beads that are useful in forming foamed cups with improved strength and thermal properties are prepared by forming an aqueous suspension of initial styrenic polymer beads and adding thereto an emulsion of a comonomer solution of styrenic monomer and divinylbenzene, which emulsion also contains free-radical-producing catalysts, and the suspension with added monomers is heated to copolymerize the styrenic monomer and divinylbenzene within and on the initial beads and form modified beads.Type: GrantFiled: July 8, 1986Date of Patent: May 12, 1987Assignee: Atlantic Richfield CompanyInventor: Adolph V. DiGiulio
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Patent number: 4663357Abstract: Thermoplastic particles are suspended in water or other suspending fluids with a suspending aid(s) to prevent agglomeration of the beads, pellets or particles. To this suspension is added monomer(s) containing a multifunctional initiator(s). The monomer and initiator(s) are pre-emulsified in water or other fluid(s) before the addition in order to improve distribution of the monomer(s) and initiator(s) in or on the particles. After or during the addition(s), the suspension temperature is raised to cause polymerization. The procedures may be repeated to increase the coating or penetrated polymer content. New compositions of matter are made by this technique wherein the new compositions are plastic resins either coated or penetrated, or both, with a thermoplastic(s) of very high molecular weight not obtainable by present, commercial polymerization techniques. The compositions are superior to the feed resins because of the enhancement of physical properties brought about by the high molecular weights phase(s).Type: GrantFiled: May 12, 1986Date of Patent: May 5, 1987Assignee: Atlantic Richfield CompanyInventors: Bernard H. Meyer, Adolph V. DiGiulio, Joseph C. Kinslow, Dennis M. Hajnik
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Patent number: 4661386Abstract: Styrenic polymer beads that are useful in forming foamed cups with improved strength and thermal properties are prepared by forming an aqueous suspension of initial styrenic polymer beads and adding thereto an emulsion of a comonomer solution of styrenic monomer and divinylbenzene, which emulsion also contains free-radical-producing catalysts, and the suspension with added monomers is heated to copolymerize the styrenic monomer and divinylbenzene within and on the initial beads and form modified beads.Type: GrantFiled: July 16, 1986Date of Patent: April 28, 1987Assignee: Atlantic Richfield CompanyInventor: Adolph V. DiGiulio
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Patent number: 4659600Abstract: Styrenic polymer beads that are useful in forming foamed cups with improved strength and thermal properties are prepared by forming an aqueous suspension of initial styrenic polymer beads and adding thereto an emulsion of a comonomer solution of styrenic monomer and divinylbenzene, which emulsion also contains free-radical-producing catalysts, and the suspension with added monomers is heated to copolymerize the styrenic monomer and divinylbenzene within and on the initial beads and form modified beads.Type: GrantFiled: July 16, 1986Date of Patent: April 21, 1987Assignee: Atlantic Richfield CompanyInventor: Adolph V. DiGiulio
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Patent number: 4659745Abstract: Styrenic polymer beads that are useful in forming foamed cups with improved strength and thermal properties are prepared by forming an aqueous suspension of initial styrenic polymer beads and adding thereto an emulsion of a comonomer solution of styrenic monomer and divinylbenzene, which emulsion also contains free-radical-producing catalysts, and the suspension with added monomers is heated to copolymerize the styrenic monomer and divinylbenzene within and on the initial beads and form modified beads.Type: GrantFiled: July 7, 1986Date of Patent: April 21, 1987Assignee: Atlantic Richfield CompanyInventor: Adolph V. DiGiulio
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Patent number: 4657594Abstract: Expanded perlite coated with an amino-functional siloxane and a silicone wetting agent, and a joint compound incorporating same, which, when applied to gypsum wallboard, has improved bonding properties and greater uniformity in paint gloss appearance between the surface of the joint compound and the surface of the wallboard.Type: GrantFiled: July 5, 1985Date of Patent: April 14, 1987Assignee: USG CorporationInventor: Arthur W. Struss
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Patent number: 4652609Abstract: Styrenic polymer beads that are useful in forming foamed cups with improved strength and thermal properties are prepared by forming an aqueous suspension of initial styrenic polymer beads and adding thereto an emulsion of a comonomer solution of styrenic monomer and divinylbenzene, which emulsion also contains free-radical-producing catalysts, and the suspension with added monomers is heated to copolymerize the styrenic monomer and divinylbenzene within and on the initial beads and form modified beads.Type: GrantFiled: July 17, 1986Date of Patent: March 24, 1987Assignee: Atlantic Richfield CompanyInventor: Adolph V. DiGiulio
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Patent number: 4629743Abstract: Spherical particles of vinyl resins having high bulk density can be prepared by the suspension polymerization process by using as a dispersant an alkyl hydroxy cellulose having a viscosity of from about 1000 to about 100,000 cps. A suitable dispersant is a hydroxypropyl methyl cellulose polymer having the formula: ##STR1## where n is from about 300 to about 1500.Type: GrantFiled: April 4, 1986Date of Patent: December 16, 1986Assignee: The B.F. Goodrich CompanyInventor: Paul O. Hong
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Patent number: 4627947Abstract: In the case of a process for producing pourable spherical-segment-shaped packing material particles (18) made of plastic which have an external convex and an internal concave surface, the plastic material is mixed with additives, such as bubble forming agents, coloring pigments and similar agents. The plastic material is fed, by means of a feeding funnel (17) into an extruder (14) through an opening in a bush (13) surrounding the extrusion screw. The plastic material plasticizes over the course of the extruder (14) and, because of the difference in speed existing over the cross section of the mass, comes out of an opening (15) in the die with a bent surface. The plastic material is cut off directly at the opening (15) of the die and before any considerable expansion has taken place. Before the processing of the plastic granules in the extruder (14) a bubble-forming agent (nucleation agent) is applied to their surface in a drum (5).Type: GrantFiled: November 30, 1984Date of Patent: December 9, 1986Assignee: Storopack, Hans Reichenecker GmbH & Co.Inventor: Gerd Voss
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Patent number: 4628068Abstract: Expandable styrene polymer particles which have anti-static and anti-lumping properties during expansion and after molding into an article are produced by adding 0.1 to 0.4 parts of dialkyl bisalkoxylated quaternary ammonium salts per 100 parts of polymer particles by coating of the expandable polymer particles with the salts. The salts may be added as sole antistatic agent or in addition to the known internal additives which impart fastcool and antilump properties.Type: GrantFiled: May 1, 1986Date of Patent: December 9, 1986Assignee: Atlantic Richfield CompanyInventors: Haven S. Kesling, Jr., James J. Harris
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Patent number: 4626554Abstract: Styrenic polymer beads that are useful in forming foamed cups with improved strength and thermal properties are prepared by forming an aqueous suspension of initial styrenic polymer beads and adding thereto an emulsion of a comonomer solution of styrenic monomer and divinylbenzene, which emulsion also contains free-radical-producing catalysts, and the suspension with added monomers is heated to copolymerize the styrenic monomer and divinylbenzene within and on the initial beads and form modified beads.Type: GrantFiled: November 29, 1985Date of Patent: December 2, 1986Assignee: Atlantic Richfield CompanyInventor: Adolph V. DiGiulio
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Patent number: 4624923Abstract: A metal-containing polyaldehyde microsphere composed of a polyaldehyde microsphere to which a transition metal, e.g. Au, Ag, Pt, Pd, Tc, Fe, Ni or Co, is bound may be obtained in accordance with this invention. The polyaldehyde, e.g. polyacrolein or polyglutaraldehyde, may be encapsulated in agarose, and the microsphere may be radioactive or magnetic. The microphere may additionally have a compound having at least one amine group, e.g. a drug, antibody, antigen, enzyme or other protein, bound to its surface.In one embodiment a transition metal is bound to a polyaldehyde microsphere by contacting the polyaldehyde microsphere with a suitable amount of an appropriate salt or acid of the transition metal under suitable conditions so as to cause the salt or acid to be reduced to a lower valence state and to bind to the microsphere. Some salts or acids may thus be reduced to the elemental state; others are further reduced with an appropriate reducing agent.Type: GrantFiled: January 24, 1986Date of Patent: November 25, 1986Assignee: Yeda Research and Development Company LimitedInventor: Shlomo Margel
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Patent number: 4623584Abstract: Expandable phenolic resin-coated composite beads comprise an aggregate having coated thereon a solid, expandable resin composition comprising a solid, phenolic resin initial condensation product, a foaming agent and, if necessary, a hardening agent. The expandable phenolic resin-coated composite beads provide composite cellular moldings in which the aggregates are uniformly dispersed in a phenolic resin-expanded layer and are firmly adhered to the expanded layer. The composite cellular moldings can be adhered to a face plate to form integral laminates.Type: GrantFiled: February 1, 1985Date of Patent: November 18, 1986Assignee: Sekisui Kaseihin Kogyo Kabushiki KaishaInventors: Kodo Masui, Shigetoshi Tanaka, Yoshikazu Kobayashi
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Patent number: 4622346Abstract: Styrenic polymer beads that are useful in forming foamed cups with improved strength and thermal properties are prepared by forming an aqueous suspension of initial styrenic polymer beads and adding thereto an emulsion of a comonomer solution of styrenic monomer and divinylbenzene, which emulsion also contains free-radical-producing catalysts, and the suspension with added monomers is heated to copolymerize the styrenic monomer and divinylbenzene within and on the initial beads and form modified beads.Type: GrantFiled: November 29, 1985Date of Patent: November 11, 1986Assignee: Atlantic Richfield CompanyInventor: Adolph V. DiGiulio
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Patent number: 4622345Abstract: Expandable styrene polymer particles which have anti-static and anti-lumping properties during expansion and after molding into an article are produced by adding 0.1 to 0.4 parts of trialkyl alkylalkoxylated quaternary ammonium salts, per 100 parts of polymer particles by coating of the expandable polymer particles with the salts. The salts may be added as sole antistatic agent or in addition to the known internal additives which impart fast-cool and anti-lump properties.Type: GrantFiled: May 1, 1986Date of Patent: November 11, 1986Assignee: Atlantic Richfield CompanyInventors: Haven S. Kesling, Jr., James J. Harris
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Patent number: 4613524Abstract: Open-cell foamed particles and molded shapes having up to 99% porosity are formed from fumed oxides, for example SiO.sub.2, Al.sub.2 O.sub.3, TiO.sub.2, with or without functional groups, in 30-99%, by weight, and polymers, for example polyvinyl chloride and copolymers thereof, and styrene. The resulting structures are thermally insulating. The structures can be formed by beating small amounts of a liquid polymerizable monomer into the fumed oxide or by immersing a formed shape of the oxide in a liquid monomer and thereafter polymerizing the monomer to a solid polymer. The oxide is believed to have a microfibrous nature and the polymer is believed to coat the oxide, without destroying the open-nature configuration of the oxide, and cements the oxide particles together in the microfibrous condition.Type: GrantFiled: January 27, 1986Date of Patent: September 23, 1986Assignee: The Dow Chemical CompanyInventor: Wilhelm E. Walles
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Patent number: 4609681Abstract: Expandable styrene polymer particles which have anti-stratification and anti-lumping properties during expansion are produced by dry blending styrene polymer particles in the presence of 0.01-0.04 parts of alkyl and alkylaryl ethers of polyethoxyethanol mono- and diesters of phosphoric acid per 100 parts of polymer particles. The esters may be added as sole anti-stratification or anti-lumping agent or in addition to known anti-lumping agents.Type: GrantFiled: January 13, 1986Date of Patent: September 2, 1986Assignee: Atlantic Richfield CompanyInventor: Alvin R. Ingram
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Patent number: 4608394Abstract: Expandable styrene polymer particles which have anti-static and anti-lumping properties during expansion are produced by adding 0.1 to 0.4 parts of alkyl and alkylaryl ethers of polyethoxyethanol mono- and diesters of phosphoric acid per 100 parts of polymer particles during impregnation of the polymer particles with blowing agents. The esters may be added as sole antistatic agent or in addition to the known internal additives which impart fast-cool and anti-lump properties.Type: GrantFiled: January 13, 1986Date of Patent: August 26, 1986Assignee: Atlantic Richfield CompanyInventor: Alvin R. Ingram
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Patent number: 4603149Abstract: Expandable styrene polymer particles which have anti-static and anti-lumping properties during expansion and after molding into an article are produced by adding 0.1 to 0.4 parts of dialkyl bisalkoxylated quaternary ammonium salts per 100 parts of polymer particles by coating of the expandable polymer particles with the salts. The salts may be added as sole antistatic agent or in addition to the known internal additives which impart fastcool and antilump properties.Type: GrantFiled: December 23, 1985Date of Patent: July 29, 1986Assignee: Atlantic Richfield CompanyInventors: Haven S. Kesling, Jr., James J. Harris
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Patent number: 4599366Abstract: Expandable styrene polymer particles which have anti-static and anti-lumping properties during expansion and after molding into an article are produced by adding 0.1 to 0.4 parts of trialkyl alkylalkoxylated quaternary ammonium salts, per 100 parts of polymer particles by coating of the expandable polymer particles with the salts. The salts may be added as sole antistatic agent or in addition to the known internal additives which impart fast-cool and anti-lump properties.Type: GrantFiled: December 23, 1985Date of Patent: July 8, 1986Assignee: Atlantic Richfield CompanyInventors: Haven S. Kesling, Jr., James J. Harris
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Patent number: 4596833Abstract: Substantially non-crosslinked polypropylene foamed particles having a bulk density of from 8 to 100 g/l and a particle diameter of from 1 to 5 mm and containing an organic sodium phosphate represented by the formula: ##STR1##Type: GrantFiled: October 22, 1985Date of Patent: June 24, 1986Assignee: Mitsubishi Yuka Badische Co., Ltd.Inventors: Hiroshi Endo, Toshio Yagi
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Patent number: 4588751Abstract: Expandable styrene polymer particles which have anti-stratification and anti-lumping properties during expansion are produced by dry blending styrene polymer particles in the presence of 0.01-0.04 parts of alkyl and alkylaryl ethers of polyethoxyethanol mono- and diesters of phosphoric acid per 100 parts of polymer particles. The esters may be added as sole anti-stratification or anti-lumping agent or in addition to known anti-lumping agents.Type: GrantFiled: October 25, 1985Date of Patent: May 13, 1986Assignee: Atlantic Richfield CompanyInventor: Alvin R. Ingram