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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 6916939 | Process for the preparation of cyclic esters and method for purification of the same The present invention provides a process for production of a cyclic ester by depolymerization of an aliphatic polyester. In the process, a mixture containing the aliphatic polyester and a specific polyalkylene glycol ether, which has a boiling point of 230-450° C. ... | 07/12/2005 |
| 6891048 | Glycolide production process, and glycolic acid composition The invention provides a process for producing glycolide by depolymerization by heating of a glycolic acid oligomer in the presence or absence of a solvent, which process ensures stable depolymerization. The depolymerization reaction is carried out while the content... | 05/10/2005 |
| 6846436 | Semiconductive polyvinylidene fluoride resin composition A semiconductive polyvinylidene fluoride resin composition comprising 100 parts by weight of a polyvinylidene fluoride resin, 0.03 to 10 parts by weight of at least one tetraalkylammonium salt selected from the group consisting of tetraalkylammonium sulfates and tet... | 01/25/2005 |
| 6762229 | Polyarylene sulfide resin composition A poly(arylene sulfide) resin composition comprising a poly(arylene sulfide) and, as a modifier, an organic amide compound compounded in a proportion of 0.2 to 10 parts by weight per 100 parts by weight of the poly(arylene sulfide). ... | 07/13/2004 |
| 6693204 | Method for purification of cyclic ester A method of refining a crystal of a crude cyclic ester comprises the steps of supplying the crude cyclic ester to a vertically extending cylindrical refiner (1) from an inlet (3) provided at a lower part of the refiner (1), agitating the crude cyclic este... | 02/17/2004 |
| 6686048 | Composite carbonaceous heat insulator A composite carbonaceous heat insulator which comprises a carbonaceous heat-insulating member having a bulk density of 0.1 to 0.4 g/cm3, a carbonaceous protecting layer having a bulk density of 0.3 to 2.0 g/cm3 and comprising a carbo... | 02/03/2004 |
| 6673403 | Gas-barrier, multi-layer hollow container The invention relates a gas barrier multi-layer hollow container having a multi-layer wall structure that a thermoplastic resin layer is laminated on at least one side of a layer formed from polyglycolic acid containing at least 60 wt. % of a repeating un... | 01/06/2004 |
| 6641878 | Optical pickup device holding container An optical pickup device-holding container, which is formed from a resin composition comprising a poly(arylene sulfide) (A) and an inorganic filler (B) and having a thermal conductivity of at least 1 W/mK; and an optical pickup device in which at least a ... | 11/04/2003 |
| 6610853 | N-(phenylsulfonyl)picolinamide derivatives, process for producing the same, and herbicide A herbicide containing as the active ingredient an N-(henylsulfonyl)picolinamide derivative represented by general formula (I) wherein X reprcsents a halogeno, a C1-4 alkyl, a C1-4 haloalkyl, a C1-4 alkoxy, a C1-4 | 08/26/2003 |
| 6610766 | Polyvinylidene fluoride resin composition The invention relates to polyvinylidene fluoride resin compositions comprising 100 parts by weight of a polyvinylidene fluoride resin, and 0.03 to 10 parts by weight of at least one compound selected from the group consisting of alkyl quaternary ammonium ... | 08/26/2003 |
| 6545081 | Synthetic resin composition A moderately conductive synthetic resin composition comprising a synthetic resin (A), a carbon precursor (B) and at least one conductive filler (C) selected from the group consisting of a non-fibrous conductive filler and a metallic fibrous material, both... | 04/08/2003 |
| 6545075 | Thermoplastic resin composition A thermoplastic resin composition improved in compatibility, molding or forming ability, melt-flow properties and mechanical properties, which comprises 100 parts by weight of a resin component containing 40 to 99 wt. % of a poly(arylene sulfide) (A) and ... | 04/08/2003 |
| 6469606 | Coil component A coil part which is obtained by sealing at least part of the periphery of a coil with a conductor wound on a bobbin with a high heat-conductive and magnetism-impermeable resin composition, and can efficiently guide out a magnetic flux generated to the ou... | 10/22/2002 |
| 6432516 | Moistureproofing film and electroluminescent device A moistureproof film composed of a transparent multi-layer film having a layer structure that thin metal or nonmetal oxide layers (C) are respectively arranged directly or through an adhesive layer (B) on both sides of a hygroscopic resin layer (A), and h... | 08/13/2002 |
| 6416832 | Packaging film or sheet The invention provides a single-layer or multi-layer packaging film or sheet having at least one layer formed of a polyamide resin composition, wherein the layer formed of the polyamide resin composition is a layer (A) formed of a polyamide resin composit... | 07/09/2002 |
| 6342557 | Resin composition and molded or formed product A resin composition comprising a synthetic resin and a powdered magnetic material, wherein (1) the powdered magnetic material is soft ferrite powder having a rate of permeability change by temperature ranging from -0.040 to 0.010%/° C. in a temperature r... | 01/29/2002 |
| 6342282 | Heat-shrinkable multi-layer film The invention provides a heat-shrinkable multi-layer film comprising at least a thermoplastic resin layer as the outermost layer (A), a gas barrier resin layer as a core layer (B) and a sealing resin layer as the innermost layer (C), and optionally an adh... | 01/29/2002 |
| 6338900 | Soft magnetic composite material A soft magnetic composite material obtained by dispersing a powdered magnetic material (A) composed of soft ferrite in a polymer (B), wherein the powdered magnetic material (A) is a powdered magnetic material of a random form obtained by grinding a sinter... | 01/15/2002 |
| 6271426 | Process for the production of 2,6-dichloro-3,5-di(secondary or tertiary alkyl)toluene This invention relates to an improved process for producing 2,6-dichloro-3,5-di(secondary or tertiary alkyl)toluene represented by the following formula (I). The process comprises chlorinating 3,5-di(secondary and tertiary alkyl)toluene represented by the... | 08/07/2001 |
| 6245437 | Gas-barrier composite film A composite gas barrier film having a layer structure comprises a thermoplastic resin film laminated on at least one side of a film formed from polyglycolic acid containing at least 60 wt. % of a repeating unit represented by the following formula (1): ... | 06/12/2001 |
| 6238775 | Transfer material-carrying member The invention relates to a transfer material-carrying member formed from a resin composition comprising at least two resins selected from the group consisting of (A) a polyester resin containing a predominant repeating unit composed of ethylene terephthal... | 05/29/2001 |
| 6183679 | Production process for injection-molded product of polyglycolic acid The invention provides an injection-molded product of polyglycolic acid obtainable by molding a thermoplastic resin material at an injection temperature ranging from the melting point, Tm of the polymer to 255° C., wherein the thermoplastic resin materia... | 02/06/2001 |
| 6159416 | Stretch blow molded container and production process thereof The invention provides a stretch blow molded container formed from a thermoplastic resin material which comprises polyglycolic acid having (a) a repeating unit represented by the following formula (1): ##STR1## (b) a melt viscosity, η* [as measured at a ... | 12/12/2000 |
| 6146726 | Heat-shrinkable multi-layer film The invention provides a heat-shrinkable multi-layer film comprising at least a thermoplastic resin layer as the outermost layer (A), a gas barrier resin layer as a core layer (B) and a sealing resin layer as the innermost layer (C), and optionally an adh... | 11/14/2000 |
| 6130279 | Resin composition A resin composition comprising a poly(phenylene sulfide) resin and -alumina, wherein the composition comprises (A) 15 to 45 wt. % of a poly(phenylene sulfide) resin having a melt viscosity of 5 to 100 Pa.multidot.s as measured at 310° C. and a she... | 10/10/2000 |
| 6083535 | Effervescent granular preparation for keeping cut flower freshness An effervescent granular preparation for keeping cut flower freshness includes an azole-substituted cyclopentanol derivative represented by formula (I) (set forth below) and 2-bromo-2-nitro-1, 3-propanediol as effective components and to a process for pro... | 07/04/2000 |
| 6046251 | Injection-molded product of polyglycolic acid and production process thereof An injection-molded product is obtained by injection molding a thermoplastic resin material. The thermoplastic resin material comprises a polyglycolic acid homopolymer or copolymer having a repeating unit represented by the following formula (1): ##S... | 04/04/2000 |
| 6001439 | Stretch blow molded container and production process thereof The invention provides a stretch blow molded container formed from a thermoplastic resin material which comprises polyglycolic acid having (a) a repeating unit represented by the following formula (1): ##STR1## (b) a melt viscosity, η* [as measured at a ... | 12/14/1999 |
| 5908917 | Polyglycolic acid sheet and production process thereof The invention provides a polyglycolic acid sheet obtainable by melt-extruding a thermoplastic resin material into a sheet in a temperature range of from the melting point, Tm of the polymer to 255° C., wherein the thermoplastic resin material comprises ... | 06/01/1999 |
| 5897960 | Laminate and production process thereof A laminate having a laminated structure of at least two layers includes a gas barrier film (A) formed from a mixture containing at least one poly(meth)acrylic acid polymer selected from the group consisting of poly(meth)acrylic acid and partially neutrali... | 04/27/1999 |
| 5853639 | Oriented polyglycolic acid film and production process thereof The invention provides an oriented polyglycolic acid film formed from a thermoplastic resin material which comprises polyglycolic acid having a repeating unit represented by the following formula (1): ##STR1## and the following physical properties: (... | 12/29/1998 |
| 5840830 | Process for producing poly(arylene sulfide) The invention provides a process for producing a poly(arylene sulfide) comprising a dehydration step of heating and dehydrating a mixture containing an organic amide solvent (a), an alkali metal sulfide and water to control a water content in the mixture ... | 11/24/1998 |
| 5830991 | Preparation process and purification process of dimeric cyclic ester of hydroxycarboxylic acid The invention provides an economical and efficient process for preparing a dimeric cyclic ester of an -hydroxycarboxylic acid by depolymerizing a corresponding -hydroxycarboxylic acid oligomer, which comprises the steps of (1) heating a mixt... | 11/03/1998 |
| 5744576 | Process for producing poly(phenylene sulfide) In a process for producing poly(phenylene sulfide), in which an alkali metal sulfide is reacted with a dihalo-aromatic compound in an organic amide solvent, the reaction is conducted through the following Steps 1 and 2, thereby efficiently providing granu... | 04/28/1998 |
| 5709951 | Composite deposited film and production process thereof A composite deposited film including (A) a polymeric film substrate; (B) a deposit of an inorganic material formed on at least one side of the polymeric film substrate (A); and (C) a water-resistant film laminated on the deposit (B) and formed from a mixt... | 01/20/1998 |
| 5688586 | Poly(ethylene oxalate), product formed of molded therefrom and production process of poly(ethylene oxalate) The invention provides poly(ethylene oxalate) containing recurring units represented by the following formula (1): ##STR1## in a proportion of at least 60 basal mol %, wherein (a) the solution viscosity (ηinh) is at least 0.25 dl/g as mea... | 11/18/1997 |
| 5683964 | N-(substituted amino)imide derivatives, preparation process thereof, and herbicidal composition An N-(substituted amino)imide derivative represented by the formula (I) is a novel compound which can be utilized as an effective ingredient of herbicidal compositions. ##STR1## wherein, R1 is hydrogen atom, C1 -C4 al... | 11/04/1997 |
| 5650459 | Poly (arylene sulfide) resin composition A poly(arylene sulfide) resin composition comprising in admixture a poly(arylene sulfide) resin and at least one nickel compound selected from the group consisting of (a) nickel carbonates, (b) nickel hydroxide, (c) organic carboxylates of nickel and (d) ... | 07/22/1997 |
| 5621026 | Gas barrier film and production process thereof Disclosed herein is a gas barrier film formed from a mixture containing (A) at least one poly(meth)acrylic acid polymer selected from the group consisting of poly(meth)acrylic acid and partially neutralized products of poly(meth)acrylic acid and (B) a sac... | 04/15/1997 |
| 5612287 | N-(substituted amino) pyrrole derivatives preparation process thereof, and herbicidal compositions This invention is to provide an N-(substituted amino)pyrrole derivative represented by the formula (I): which is used as an effective ingredient of herbicidal compositions: ##STR1## wherein R2, R3, R4 and R5 | 03/18/1997 |
