Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 8106144 | Process for producing polycarbonate A process is described for producing polycarbonate and utilizing at least some of the process waste water by concentrating the sodium chloride-containing waste water phases for the electrolysis using osmotic membrane distillation, if appropriate with simultaneous di... | 01/31/2012 |
| 7858729 | Methods of controlling molecular weight distribution of polymers and compositions thereof A catalyst, co-catalyst, and/or chain transfer agent is added at a time after initiation of an addition polymerization reaction to produce a polymer product with a widened molecular weight distribution relative to having all of the components in the original reactio... | 12/28/2010 |
| 6777528 | Process for producing polycarbonate resin A process for producing a polycarbonate resin which comprises performing melt polycondensation of pentacyclopentadecanedimethanol or pentacyclopentadecanedimethanol and diol with carbonic acid diester in the presence of a catalyst containing at least one compound se... | 08/17/2004 |
| 6720404 | Polycarbonates for optical use, and their applications This specification discloses polycarbonates for optical use. These polycarbonates are prepared by reacting a bisphenol and carbonic diester in the presence of an alkaline compound catalyst. These polycarbonates have: (i) an intrinsic viscosity (IV) as determi... | 04/13/2004 |
| 6716368 | Phosporescent polycarbonate and molded articles The present invention is drawn to a transparent or translucent thermoplastic composition comprising a thermoplastic polycarbonate resin and a phosphorescent phosphor with an aluminate matrix expressed by MAl2O4 in which M is calcium, strontium ... | 04/06/2004 |
| 6642322 | Methods of making telechelic oligomers, methods of making block copolymers, and novel block copolymers A method of making telechelic oligomers comprises reacting a substrate compound selected from the group consisting of relatively high molecular weight polymers with a chain transfer agent in the presence of an alkali metal catalyst. The telechelic oligome... | 11/04/2003 |
| 6635710 | Manufacturing method for polycarbonate A method for manufacturing polycarbonate by melt-polycondensing bisphenol and carbonic acid diester uses as catalyst an alkali metal compound and/or alkaline earth metal compound (a). The catalyst is added to the bisphenol prior to the melt polycondensati... | 10/21/2003 |
| 6590022 | Process for preparing protective-colloid-stabilized vinylaromatic-1,3-diene copolymers A method is provided for producing protective colloid-stabilized vinyl aromatic-1.3-diene-copolymers in the form of their aqueous polymer dispersions or in the form of a powder which can be re-dispersed in water, by emulsion-polymerizing a mixture contain... | 07/08/2003 |
| 6562433 | Method for the preparation of polycarbonate with reduced levels of fries The present invention provides a composition comprising polycarbonate wherein the polycarbonate has a very low Fries content (e.g., above 5 ppm and below 360 ppm). The present invention also provides a polycarbonate having a very low Fries content which i... | 05/13/2003 |
| 6380345 | Process for producing polycarbonates Purpose To enable the reduction of the quantities of wastes and the performance of long term continuous operation in polycarbonate production. Means for solution As a method for removing the reaction byproducts in the production of a polycarbonate resin by suc... | 04/30/2002 |
| 6291598 | Process for the production of a polymerized material and the product produced thereby A polymerized material produced by the polymerization of an organic amide monomer in the presence of an organic carbonate and a process for the preparation thereof. The process comprises the steps of: heating an amount of the organic anide monomer to a te... | 09/18/2001 |
| 6037437 | Method for producing an aromatic polycarbonate A method for producing an aromatic polycarbonate which comprises subjecting to a transesterification polymerization reaction at least one polymerizable material selected from a molten monomer mixture of an aromatic dihydroxy compound and a diaryl carbonat... | 03/14/2000 |
| 5859172 | Polycarbonate, copolycarbonate resin compositions and preparing method thereof A copolycarbonate and a copolycarbonate composition having oustanding hardness and a method for their manufacture. A copolycarbonate containing the component units shown in Formula I!below in the amount of 50-99 mole %: ##STR1## X is ##STR2## ... | 01/12/1999 |
| 5852156 | Polycarbonate composition A polycarbonate composition comprises (a) a substantially chlorine-atom free, aromatic dihydroxy compound/carbonic diester transesterification polycarbonate, and the following components (b), (c) and (d) in specifically, extremely limited amounts, wherein... | 12/22/1998 |
| 5767224 | Two-step process for the production of thermoplastic polycarbonate The invention relates to a two-step melt process for the production of thermoplastic, solvent-free, low-branching polycarbonates with low --OH terminal group content using a self-cleaning high-viscosity reactor.... | 06/16/1998 |
| 5756641 | Process for producing thermoplastic polycarbonate The present invention relates to a transesterification process for producing thermoplastic polycarbonates with the use of fixed bed catalysts.... | 05/26/1998 |
| 5717057 | Method of manufacturing polycarbonate A method for manufacturing polycarbonate in which an aromatic dihydroxy compound and a carbonic acid diester can be effectively subjected to melt polycondensation using a small amount of a catalyst, making it possible to manufacture polycarbonate having o... | 02/10/1998 |
| 5712362 | Process for the production of UV-stable polycarbonates The invention relates to a process for the production of UV-stable polycarbonates, to the polycarbonates obtainable in accordance with the invention and to their use for the production of sheets, more particularly plastic panels.... | 01/27/1998 |
| 5696222 | Process for the production of polycarbonate A process for the production of a terminal-blocked aromatic polycarbonate by melt-polycondensing an aromatic dihydroxy compound and diphenylcarbonate, the process comprising adding a specific carbonate or carboxylic ester after a polycarbonate formed has ... | 12/09/1997 |
| 5684115 | (Co)polycarbonate composition containing boric acid and a basic catalyst A processes for producing a (co)polycarbonate having a low terminal hydroxyl group concentration and being excellent in heat resistance and hue, which comprises melt-polycondensing a dihydroxy compound with a carbonic diester in the presence of a catalyst... | 11/04/1997 |
| 5663278 | (Co)polycarbonate and process for producing the same A processes for producing a (co)polycarbonate having a low terminal hydroxyl group concentration and being excellent in heat resistance and hue, which comprises melt-polycondensing a dihydroxy compound with a carbonic diester in the presence of a catalyst... | 09/02/1997 |
| 5652313 | Two-stage process for the manufacture of thermoplastic polycarbonate The present invention provides a two-stage melt process for the manufacture of thermoplastic, solvent-free, low-branched polycarbonates with low OH end-group contents with the use of ammonium or phophonium catalysts in the first stage and alkali and alkal... | 07/29/1997 |
| 5608027 | Complex stabilizer composition to improve the melt stability and color stability of polycarbonates A composition comprising a phosphorus containing acid and an ester of a phosphorus containing acid useful for imparting improved physical and chemical properties to polymers containing polyesters, copolyester carbonates, polycarbonates, and mixtures there... | 03/04/1997 |
| 5606008 | Preparation method of polycarbonate resin The purpose of the present invention is to provide a method for manufacturing polycarbonate in which polycarbonate having outstanding color matching, outstanding thermal properties, particularly retention stability during molding, and outstanding water re... | 02/25/1997 |
| 5548041 | Process for producing polycarbonate A polycarbonate is produced by transesterification from a dihydroxy compound such as 2,2-bis(4-hydroxyphenyl)propane and a diester of carbonic acid such as bisphenyl carbonate in a reactor made of stainless steel and treated by electropolishing or acid pi... | 08/20/1996 |
| 5548059 | Unsaturated polyesters Unsaturated linear polymers have repeating units of a reaction product of a first monomer, a second monomer, a third monomer and optionally a fourth monomer. The linear polymers have a glass transition temperature ranging from about 52.degree. C. to about... | 08/20/1996 |
| 5527875 | Process for producing aromatic polycarbonate A process for producing an aromatic polycarbonate having a weight average molecular weight of from 7,000 to 60,000 is disclosed, comprising melt polycondensing an aromatic diol compound (e.g., bisphenol A) and a diaryl carbonate compound (e.g., diphenyl c... | 06/18/1996 |
| 5525701 | Method for the manufacture of aromatic polycarbonate Aromatic polycarbonates manufactured by polycondensation of a dihydric compound and a carbonic acid diester using at least two reactors in series have improved color and low impurities content when filtered before the final reactor and again before the fi... | 06/11/1996 |
| 5516878 | Process for the production of aromatic polycarbonate A process for the production of an aromatic polycarbonate, which comprises polycondensing an aromatic dihydroxy compound and a diaryl carbonate in the presence, as a polycondensation catalyst, of at least one alkali metal salt selected from the group cons... | 05/14/1996 |
| 5510450 | Method of producing copolymerized polycarbonates The object of the present invention is to provide a method of producing copolymerized polycarbonates having improved flow and formability, in addition to excellent mechanical properties, heat resistance, transparency, and color tone. A method of producing... | 04/23/1996 |
| 5494992 | (Co)polycarbonate and process for producing the same A processes for producing a (co)polycarbonate having a low terminal hydroxyl group concentration and being excellent in heat resistance and hue, which comprises melt-polycondensing a dihydroxy compound with a carbonic diester in the presence of a catalyst... | 02/27/1996 |
| 5489665 | Process for producing polycarbonate A polycarbonate is produced by transesterification from a dihydroxy compound such as 2,2-bis(4-hydroxyphenyl)propane and a diester of carbonic acid such as bisphenyl carbonate in the presence of a substance which contains iron in an amount of 50% by weigh... | 02/06/1996 |
| 5480959 | Substantially pure bisphenols and polymers comprising bisphenols Bisphenols are prepared from cyclic monoterpene precursors and high glass transition temperature polymers are prepared from bisphenols. More particularly, substantially pure 4-[1-[3-(4-hydroxyphenyl)-4 -methylcyclohexyl]-1-methylethyl] phenol and 4,4'-[1-... | 01/02/1996 |
| 5478874 | Flame-retardant aromatic polycarbonate resin composition and molded article A flame-retardant aromatic polycarbonate resin composition has excellent flame retardancy and high transparency without impairing excellent properties inherent to an aromatic polycarbonate resin, and is free from corroding a molding machine or a processin... | 12/26/1995 |
| 5461136 | Method for tagging thermoplastic materials with near infrared fluorophores Provided is a method for tagging thermoplastic containers using near infrared fluorescing compounds or copolymerized residues readily capable of detection. Also provided is a method for identifying a thermoplastic container. Also provided are thermoplasti... | 10/24/1995 |
| 5457174 | Method for preparing polycarbonates by transesterification in a steel reactor A process for preparing a polycarbonate which comprises performing a transesterification and a polycondensation reaction with a diarylcarbonate and dihydroxyaryl compound, in a reaction apparatus composed of stainless steel comprising at least 12% by weig... | 10/10/1995 |
| 5434227 | Process for producing polycarbonate A polycarbonate is produced by transesterification from a dihydroxy compound such as 2,2-bis(4-hydroxyphenyl)propane and a diester of carbonic acid such as bisphenyl carbonate in the presence of a substance containing iron in an amount of 50% by weight or... | 07/18/1995 |
| 5399659 | Two-stage process for the production of thermoplastic polycarbonate The invention relates to a two-stage process for the production of thermoplastic, solvent-free lightly branched polycarbonates in the melt using ammonium and/or phosphonium catalysts in the first stage and alkali metal and/or alkaline earth metal catalyst... | 03/21/1995 |
| 5384388 | Method of producing copolymerized polycarbonates [Purpose] The object of the present invention is to provide a method of product copolymerized polycarbonates having improved flow and formability, in addition to excellent mechanical properties, heat resistance, transparency, and color tone. [Constitution... | 01/24/1995 |
| 5362841 | Process for the preparation of high molecular weight halogenated polycarbonate A process for preparing halogenated polycarbonate wherein the total amount of base the end pH of the aqueous phaser and the amount of coupling catalyst employed in the reaction are controlled to selected levels.... | 11/08/1994 |
