Polymer Having Heterocyclic Group Or Polymer Derived From Monomer Having Heterocyclic Group Except Heterocyclic Derived Solely From Carboxylic Acid (i.e., Cyclic Imide, Lactam, Lactone, Or Anhydride) Patents (Class 264/331.12)
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Patent number: 7001557Abstract: An object of the present invention is to provide a biaxially oriented high quality polyester film excellent in thermal dimensional stability and clarity and also excellent in productivity, and also to provide a production process thereof. Another object is to provide a biaxially oriented polyester film greatly improved in the practical properties respected in various applications of the polyester film, such as the recording track shift in magnetic recording tape application, curling in magnetic recording card application, dimensional change during process in printing plate application, printing shift in ribbon application, thermostability in capacitor application, and perforation sensitivity and low temperature curling in heat-sensitive mimeograph stencil application.Type: GrantFiled: April 10, 2002Date of Patent: February 21, 2006Assignee: Toray Industries, Inc.Inventors: Tetsuya Tsunekawa, Hirofumi Hosokawa, Takuji Higashioji
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Patent number: 6866803Abstract: A slip casting mold includes a water absorption layer having self water absorption capability and substantial water resistance. With the water saturation percentage of the water absorption layer being controlled, a slurry layer is deposited in the slip casting mold mainly under capillary attractive forces of the slip casting mold. The water absorption layer comprises an open porous body which is manufactured by stirring a mixture of an epoxy compound having at least one epoxy ring in one molecule, a hardener for reacting with the epoxy compound to harden the epoxy compound, a filler for developing self water absorption capability and mold releasability, and water into an O/W-type emulsion slurry, and casting the emulsion slurry into a mold impermeable to water, hardening the emulsion slurry in the mold while containing water.Type: GrantFiled: July 10, 2000Date of Patent: March 15, 2005Assignee: Toto Ltd.Inventors: Akio Matsumoto, Takeshi Sato, Yoshifumi Misumi, Akira Hirayama, Katsuhiro Hasebe, Yoshinori Yamashita
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Patent number: 6852263Abstract: A tablet for producing a semiconductor device with substantially no bowing, comprising an epoxy resin composition comprising an epoxy resin and a curing agent, wherein the tablet has the characteristic of an amount reduced by heating being less than 0.05% by weight; a wafer with a resin layer and a semiconductor device produced by using the tablet; and a process for producing the wafer and the semiconductor device.Type: GrantFiled: September 16, 2003Date of Patent: February 8, 2005Assignee: Nitto Denko CorporationInventors: Akihisa Kuroyanagi, Hisataka Ito, Shinichirou Sudo, Hirofumi Oono
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Patent number: 6822055Abstract: The present invention relates to a method for producing a flat article comprising a material that contains the products of several reactions. The method comprises the following steps: carrying out a pre-cross-linking of a mixture comprising an epoxydation product of a carboxylic acid ester using at least one cross-linking agent in order to form a moldable material; molding the moldable material in the shape of a flat article; and curing the molded material in order to produce a flat article, wherein the pre-cross-linking reaction is separate from the curing reaction. This invention also relates to a moldable material that can be stored and to a flat article that can be obtained from the same.Type: GrantFiled: April 18, 2002Date of Patent: November 23, 2004Assignee: DLW AktiengesellschaftInventors: Bernd Fischer, Heiko Hamann, Hans-Jörg Mauk, Miko Ess, Bernd Kastl
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Patent number: 6797212Abstract: A thin walled microtube is formed by providing a continuous elongated member having an outer surface. The member is at least partially formed of a water soluble material. A coating material is provided. The coating material may be a silicone compound that is curable such that the coating material cures into a substantial non-porous silicone. The outer surface of the elongated member is coated with a coating material so as to form a substantially uniform and continuous layer of coating material on the outer surface. The layer of coating material is cured so as to form a substantial uniform and continuous layer of substantially non-porous silicone on the outer surface. The elongated member is at least partially dissolved using water and purged from the silicone layer, such that an elongated tube of substantially non-porous silicone is formed.Type: GrantFiled: April 16, 2003Date of Patent: September 28, 2004Assignee: MedArray, Inc.Inventor: Jean Patrick Montoya
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Patent number: 6784276Abstract: This invention is a highly concentrated stable solution of polyimide precursors (monomers) having a solids content ranging from about 80 to 98 percent by weight in lower aliphatic alcohols i.e. methyl and/or ethyl alcohol. The concentrated polyimide precursor solution comprises effective amounts of at least one aromatic diamine, at least one aromatic dianhydride or a lower molecular weight alkyl ester of said dianhydride, and a monofunctional endcap including monoamines, monoanhydrides and the lower alkyl esters of said monoanhydrides. These concentrated polyimide precursor solutions are particularly useful for the preparation of fibrous prepregs and composites for use in structural materials for military and civil applications.Type: GrantFiled: July 25, 2002Date of Patent: August 31, 2004Assignee: The United States of America as represented by the United States National Aeronautics and Space AdministrationInventor: Chun-Hua Chuang
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Patent number: 6770224Abstract: A process for forming a polyphenylene sulfide (PPS) component is disclosed. The PPS is molded at a temperature of about 110° C. to about 150° C. After molding, the PPS has a morphology that is at least fifty percent polycrystalline. The component is then annealed to further increase the polycrystalline portion of the PPS morphology. To effect this increase, the component is annealed at a temperature that is at least above the glass transition temperature of the molded PPS component but below its melting temperature. The component is used in optical applications and other applications in which alignment tolerances are small.Type: GrantFiled: March 22, 2001Date of Patent: August 3, 2004Assignee: TriQuint Technology Holding Co.Inventors: Harvey Edward Bair, John William Osenbach
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Publication number: 20040108623Abstract: High flow engineering thermoplastic compositions made from a thermoplastic host polymer and a low molecular weight flow modifier polymer, and products made therefrom. The flow modifier polymer is made by polymerizing at least one vinyl aromatic monomer and at least one (meth)acrylate monomer.Type: ApplicationFiled: November 18, 2003Publication date: June 10, 2004Applicant: JOHNSON POLYMER, LLCInventors: Gary A. Deeter, Thomas J. Greeley, Marco A. Villalobos
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Publication number: 20040036199Abstract: A casting compound based on a resin which cures by a chemical reaction. The casting compound is suitable for insulation of electric components and contains an epoxy resin component, a silicone-containing component, a filler, and a thermal initiator. This casting compound is processible as a single-component system.Type: ApplicationFiled: August 25, 2003Publication date: February 26, 2004Inventors: Irene Jennrich, Kristian Leo, Markus Muzic, Wolfgang Endres, Hubert Greif
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Patent number: 6649098Abstract: A method is disclosed for preparing compression molded or pressed lignocellulosic articles. The method involves forming a binder resin by combining a polyisocyanate component with a synergist component of a C1 to C4 N-alkyl pyrrolidone, gamma-butyrolactone, or mixtures thereof. A resinated lignocellulosic mixture is formed by combining the binder resin with lignocellulosic particles having a moisture content of from 2 to 15 weight percent. The compression molded or pressed lignocellulosic article is formed by compressing the resinated lignocellulosic mixture.Type: GrantFiled: August 20, 2002Date of Patent: November 18, 2003Assignee: BASF CorporationInventors: Donald C. Mente, Li-Mei Lu
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Patent number: 6562425Abstract: This invention concerns a multilayer film useful as release sheet for sheet molding compounds, comprising a first skin layer, a second skin layer, a barrier layer for monomeric resins wherein the barrier layer is between the first and second skin layers and the first and second skin layers comprise a mixture of polyolefin and adhesive resin. This invention also pertains to the multilayer films method of production, as well as an SMC sheet employing the multilayer film.Type: GrantFiled: October 9, 2001Date of Patent: May 13, 2003Assignee: Pliant CorporationInventors: Daniel G. Denehy, Eric D. Tuttle
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Patent number: 6544453Abstract: Shrinkage of cured resins is reduced by mixing the crosslinkable resin with a low profile additive (LPA). The LPA is in the form of particles which comprise an SCC polymer (or a similar crystalline polymer which melts over a narrow temperature range). The system is cured at a temperature above the melting point of the crystalline polymer (Tp), and the system and the LPA are such that at least part of the LPA remains as a separate phase in the curable resin at temperatures below Tp. It is believed that at least part of the crystalline polymer remains as a separate phase in the resin as it cures. Preferably at least part of the crystalline polymer forms a separate phase in the cured polymer after it has cooled.Type: GrantFiled: December 11, 2000Date of Patent: April 8, 2003Assignee: Landec CorporationInventors: David D. Taft, Steven P. Bitler
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Patent number: 6544464Abstract: A method capable of molding by a simple procedure such a polymer as a polysuccinimide based (co)polymer or a protein whose glass transition temperature is very close to the decomposition temperature is provided. The method for the molding of a polymer contemplated by this invention comprises heating and melting a polymer whose glass transition temperature is very close to the decomposition temperature in the presence of a solvent having a low boiling point and a high dielectric constant ratio and then molding the resultant molten product.Type: GrantFiled: November 24, 1999Date of Patent: April 8, 2003Assignee: Nippon Shokubai Co., Ltd.Inventors: Shinzo Yasuda, Masaharu Mukouyama
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Patent number: 6528005Abstract: A process for producing a lens comprising polymerizing bis(&bgr;-epithiopropyl)ether to form a lens.Type: GrantFiled: June 11, 2001Date of Patent: March 4, 2003Assignee: Mitsubishi Gas Chemical Co., Inc.Inventors: Akikazu Amagai, Motoharu Takeuchi, Atsuki Niimi
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Publication number: 20030025246Abstract: A method of producing a sintered article of polybenzimidazole by using a polybenzimidazole resin. This method comprises, in the following order, the steps of: filling a mold with a polybenzimidazole resin; after closing the mold so that the polybenzimidazole resin can be densely packed in the mold, heating the mold to a predetermined temperature ranging from 500° C. to 600° C. without applying pressure to the mold from the outside; after increasing the pressure on the mold from 0 kg/cm2 to 50-750 kg/cm2, sintering the polybenzimidazole resin while maintaining the temperature and the pressure for 15 to 200 minutes; cooling the mold; and removing the sintered article of the polybenzimidazole resin from the mold. In this method, the polybenzimidazole resin is is brought into contact with substantially no oxygen from the beginning of the step of heating the resin to the end of the sintering step.Type: ApplicationFiled: November 9, 2001Publication date: February 6, 2003Inventors: Noriyuki Niwa, Yoshisato Sasaki
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Publication number: 20030025222Abstract: The invention relates to a process for the manufacture of a molding comprising the steps ofType: ApplicationFiled: March 6, 2002Publication date: February 6, 2003Inventors: Harald Bothe, Achim Muller, Bernhard Seiferling
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Publication number: 20030006520Abstract: A method of making patterned artificial material marble/granite/solid surface material that makes artificial marble/granite/solid surface material with variable patterns by use of polymers. The polymers are combined with filler materials, an accelerating reagent or colorful material to compose basic materials and pattern materials in different colors. Molds with at least one pattern are used for curing of the basic materials and the pattern material to form the patterned artificial material and to make the artificial marble/granite/solid surface material integral.Type: ApplicationFiled: July 5, 2001Publication date: January 9, 2003Inventor: Kuo-Yuan Lin
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Patent number: 6464924Abstract: A method of forming a custom mask (40) includes introducing a deformable material (32) to an impression mask (24) and directing the deformable material (32) against at least a portion of a user's face within the impression mask (24). This forms an impression of the user's face in the deformable material (32) to form the custom mask (40). The impression mask (24) receives the deformable material (32) and directs the deformable material (32) against at least a portion of a user's face within the impression mask (24) in response to pressure applied to the impression mask (24). The deformable material (32) may include a polycaprolactone polymer or an aliphatic polyester. The impression mask (24) may receive the deformable material (32) either before the user's face is brought within the impression mask (24) or while the user's face is within the impression mask (24).Type: GrantFiled: April 5, 2000Date of Patent: October 15, 2002Inventor: W. Keith Thornton
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Patent number: 6455122Abstract: The heat resisting fiber-reinforced composite material of the invention is a heat-resisting fiber-reinforced composite material used for a product or a part that generates temperature distribution; wherein the thermal expansion coefficient at a portion corresponding to a medium to low temperature range is greater than the thermal expansion coefficient at a portion corresponding to a high temperature range, and the boundary between the portion corresponding to medium to low temperature range and the portion corresponding to the high temperature range is a transition region.Type: GrantFiled: February 14, 2001Date of Patent: September 24, 2002Assignee: Kabushiki, Kaisha Senshinzairyoriyo Gas Generator KenkyujoInventors: Kenichiro Igashira, Koji Nishio
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Publication number: 20020103328Abstract: An aromatic polycarbonate composition comprising at least one quaternary onium salt selected from the group consisting of a phosphoric acid phosphonium salt, phosphonic acid phosphonium salt, condensed phosphoric acid phosphonium salt, phosphorous acid phosphonium salt, phosphonous acid phosphonium salt, boric acid phosphonium salt, sulfuric acid phosphonium salt, phosphoric acid ammonium salt, phosphonic acid ammonium salt, condensed phosphoric acid ammonium salt, phosphorous acid ammonium salt, phosphonous acid ammonium salt, boric acid ammonium salt and sulfuric acid ammonium salt,and has a viscosity average molecular weight of 10,000 to 100,000 and a melt viscosity stability of 0.5% or less. The aromatic polycarbonate composition has excellent transparency, heat resistance and color stability. A process for producing the above aromatic polycarbonate composition is also disclosed.Type: ApplicationFiled: October 3, 2001Publication date: August 1, 2002Applicant: TEIJIN LIMITEDInventors: Wataru Funakoshi, Yuichi Kageyama, Hiroaki Kaneko, Katsushi Sasaki, Takanori Miyoshi
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Patent number: 6300469Abstract: PET with low gas permeability and good mechanical properties is produced utilizing strain-induced crystallization. This strain-induced crystallization process is utilized to produce PET films and sheets, among other products.Type: GrantFiled: November 28, 2000Date of Patent: October 9, 2001Assignee: Sealed Air Corporation (US)Inventors: Richard Freundlich, Rudy Nwana, Glenn Mathus
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Patent number: 6258899Abstract: A cleavable epoxy resin composition suitable for encapsulating electronic chips comprising the cured reaction product of a diepoxide containing a cyclic anhydride curing agent or and an amine promoter.Type: GrantFiled: April 7, 1999Date of Patent: July 10, 2001Assignee: International Business Machines CorporationInventors: Stephen Leslie Buchwalter, Joseph Paul Kuczynski, John Gregory Stephanie
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Patent number: 6258877Abstract: A method of converting stripped roofing material into a useful product comprising feeding roofing material removed during repair or reroofing of a building roof into a shredder introducing particles of material from said shredder together with particles of thermoplastic material and a particulate filler material into a high intensity mixer to form a batch of material to be mixed, intensely mixing said batch of material to produce a heated mass of hot particles of roofing material and filler material coated with molten thermoplastic, then molding said heated mass under pressure into a desired end product. The invention also includes products produced utilizing said stripped roofing material.Type: GrantFiled: December 7, 1998Date of Patent: July 10, 2001Assignee: Royal Group Technologies LimitedInventor: Vic De Zen
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Patent number: 6231800Abstract: Disclosed is a method of injection-molding for epoxy resin moldings wherein an epoxy resin composition is used as starting material, a molding cycle is shortened, a continuous molding operation is possible and a waste portion after curing can be minimized as well as an injection-moldable epoxy resin composition excellent in thermal stability possessing latent-type curing characteristics capable of rapidly promoting curing reaction in a metal mold without being cured in an injection molding machine. The aforesaid method is carried out by charging an epoxy resin composition possessing the latent-type curing characteristics into a mini-sprue metal mold which is composed of a manifold part, a mini-sprue part and an ejector-plate part and wherein a metal mold temperature at the manifold part is so maintained that the epoxy resin composition is molten but curing of the composition is not promoted, and injection-molding the composition.Type: GrantFiled: July 6, 1999Date of Patent: May 15, 2001Assignee: Mitsui ChemicalsInventors: Eiki Togashi, Tsukasa Sakuraba
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Patent number: 6224798Abstract: A method of curing a polymeric binder onto a powdered metal after such polymer has been coated on the powdered metal but before a part is therefrom molded, thereby forming a polymer matrix-powdered metal composite material. The polymer-coated powdered metal may be cured by retaining the polymer-coated powdered metal in a fluidized bed contained within a fluidized bath (e.g. a fluid bed coater/drier apparatus) even after the coating process has terminated. The temperature of the fluidized bath may then be raised, in turn raising the temperature of the fluidized bed, thereby curing the polymer onto the coated powdered metal in situ. By keeping the polymer-coated power metal in constant motion during the curing process, the polymer-coated powdered metal particles do not agglomerate nor otherwise adhere to other coated powdered metal particles.Type: GrantFiled: July 31, 2000Date of Patent: May 1, 2001Assignee: Delphi Technologies, Inc.Inventor: David Earl Gay
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Patent number: 6222007Abstract: High quality films, preimpregnated tape (prepegs) and composites have been fabricated from polyimide precursor “salt-like” solutions. These “salt-like” solutions have a low viscosity (5,000 to 10,000 cp) and a high solids content (50-65% by weight) and can be coated onto reinforcing fiber to produce prepegs with excellent tack and drape at 12-15% residual solvent (˜4-6% water from thermal imidization reaction). The processing of these types of prepegs significantly overcomes solvent removal problems and allows excellent fiber wet out. In addition, the physical characteristics of the polyimide precursor “salt-like” solutions permits processing into high-performance materials through the use of standard prepregging and composite fabrication equipment. The resultant composites are of high quality.Type: GrantFiled: May 29, 1998Date of Patent: April 24, 2001Assignee: The United States of America as represented by the National Aeronautics and Space AdministrationInventors: Roberto J. Cano, Erik S. Weiser, Terry L. St. Clair, Yoshiaki Echigo, Hisayasu Kaneshiro