Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7718754 | Promoter for polycondensation reaction A promoter for a polycondensation reaction used together with a catalyst in a polycondensation reaction, the promoter for a polycondensation reaction comprising a pyrogallol compound having a benzene ring of which three hydrogen atoms adjacent to each other are subs... | 05/18/2010 |
| 7557174 | Carboxy-terminated oligomeric polyester compositions and method for making The present invention provides carboxy-terminated oligomeric polyester compositions useful in the preparation of “weatherable” polymeric materials, for example weatherable copolyestercarbonates. In one aspect the present invention provides an oligomeric polyeste... | 07/07/2009 |
| 7205081 | Imaging member An imaging method utilizing an imaging member containing a supporting substrate, a layer of a charge carrier injecting surface, a hole blocking layer, an optional adhesive layer, a layer of a charge carrier transport material, a layer of an charge carrier generating... | 04/17/2007 |
| 7060741 | Polymer compositions with improved property constancy The present invention provides polymer compositions of special graft rubber polymers, in the production of which are employed rubbers with defined particle diameters obtained by seed polymerization using seed latex particles with defined particle diameters. ... | 06/13/2006 |
| 7009026 | Method for producing a liquid crystalline polyester and the liquid crystalline polyester The object is to provide liquid crystalline polyester which gives molded articles without generating acetic acid gas, and a method for producing the liquid crystalline polyester. This object is achieved by a method for producing a liquid crystalline polyester compri... | 03/07/2006 |
| 6716367 | Process for producing liquid crystalline polymer A process for producing a liquid crystalline polymer with increased polymerization rate and reduced deposition of monomer-derived substances to the reaction vessel during production is provided. A liquid crystalline polymer having a constituent unit derived from 4-h... | 04/06/2004 |
| 6596839 | Wholly aromatic polyester and production process therefor A process for producing a wholly aromatic polyester which is excellent in heat resistance, mechanical properties and yet color and has a high degree of polymerization by melt polymerizing a dicarboxylic acid and a diol directly on an industrial scale at a... | 07/22/2003 |
| 6472500 | Crystalline polyester resins and processes for their preparation An improved process for the preparation of high molecular weight, linear polyester resins comprises reacting an aromatic dicarboxylic acid with an excess of an alkane diol under conditions effective to reach the clearing point of the reaction; pre-condens... | 10/29/2002 |
| 6306946 | Liquid crystalline polyesters having a surprisingly good combination of a low melting point, a high heat distortion temperature, a low melt viscosity, and a high tensile elongation Disclosed is a select class of liquid crystalline polyesters and molding compositions comprising the polyesters and glass fiber. The liquid crystalline polyesters consist essentially of (1) diacid residues consisting essentially of (i) cyclohexanedicarbox... | 10/23/2001 |
| 6291122 | Polyesters A branched polyester resin of the Formula ##STR1## wherein n and m represent randomly repeating segments, and the number of n and m segments in the polymer backbone are each of from about 10 to about 10,000; X is an alkylene group, an olefinic group, or a... | 09/18/2001 |
| 6242558 | Modified polytrimethylene terephthalate A 1,3-propanediol-based aromatic polyester such as polytrimethylene terephthalate is modified by reaction with a hindered phenolic acid or ester to provide an endcapped polyester which has improved resistance to generation of acrolein when heated in air.... | 06/05/2001 |
| 6180747 | Polyesters A branched polyester resin of the Formula ##STR1## wherein n and m represent randomly repeating segments, and the number of n and m segments in the polymer backbone are each of from about 10 to about 10,000; X is an alkylene group, an olefinic group, or a... | 01/30/2001 |
| 6114492 | Process for producing liquid crystal polymer A potassium catalyst is used in combination with a cobalt catalyst to increase the reaction rate and/or reduce the reaction temperature of a melt polymerization process for producing an anisotropic melt-phase forming polymer derived from p-hydroxybenzoic ... | 09/05/2000 |
| 5945446 | Process for preparing synthetic soil-extract materials and medicaments based thereon Phenolic polymers are prepared by dissolving one or more organic phenols along with sodium periodate in aqueous base at pH 8-11, and allowing the mixtures to stand between 35 and 80° C. for a period of 30 minutes to 100 hours. One or more inorganic compo... | 08/31/1999 |
| 5665855 | Polymers and copolymers originating from the addition of oligomers containing diamino and dihydroxy ends and of bisoxazinones or bioxazolinones, and process for obtaining them Disclosed are polymers and copolymers containing at least one repeating unit of the formula ##STR1## in which X is O or NH; R is a single bond or a hydrocarbon chain; R' is a hydrocarbon chain containing one or two carbon atoms, and P is the residue ... | 09/09/1997 |
| 5602226 | Method of making multidimensional polyesters The yield of fully substituted, multidimensional aromatic hubs in the condensation of hydroxyl and acid halide functionalities is improved by adding a thallium catalyst, such as thallium ethoxide (T1-OC2 H5), in the solvent.... | 02/11/1997 |
| 5506330 | Polymerization method for preparing non-halogenated aromatic The present invention relates to a polymerization method for preparing non-halogenated aromatic polyesters by a standard interfacial polymerization except the addition of a phase-transfer catalyst to the organic phase. More specifically, the present inven... | 04/09/1996 |
| 5391690 | Process for producing (co)polycarbonate and (co)polycarbonate composition A process for producing a (co)polycarbonate or a (co)polyestercarbonate having a high molecular weight and excellent hue, heat stability and mechanical properties by reacting a dihydroxyl compound with a diester of carbonic acid and/or a diester of dicarb... | 02/21/1995 |
| 5340906 | Process for the preparation of polyester containing little deposited antimony particles as impurities Disclosed is a process for the preparation of polyester having an ethylene-terephthalate recurring-unit in the amount of not less than 60 molar % of the total recurring-unit of the polyester by polymerizing a bifunctional carboxylic acid comprising tereph... | 08/23/1994 |
| 5338828 | Mesogenic cyclic imino ether-containing compositions and polymerization products thereof Novel cyclic imino ether compositions containing one or more mesogenic moieties, when polymerized, result in products having improved properties.... | 08/16/1994 |
| 5326831 | Phenol terminated diester compositions derived from discarboxylic acids, polyester polymers or alkyd polymers, and curable compositions containing same The present invention is directed towards a process for preparing non-liquid crystalline phenol-terminated diester compositions characterized by the structure of formula 1: ##STR1## wherein R is an aliphatic divalent hydrocarbon radical containing 2 ... | 07/05/1994 |
| 5278279 | Process for producing (co)polycarbonate with transesterification catalyst and compound A process for producing a (co)polycarbonate or a (co)polyestercarbonate having a high molecular weight and excellent hue, heat stability and mechanical properties by reacting a dihydroxyl compound with a diester of carbonic acid and/or a diester of dicarb... | 01/11/1994 |
| 5262516 | Method for preparing polyetherimide-polyamide copolymers A process for preparing a polyetherimide-polyimide copolymer by (a) reacting a bis (ether anhydride) with a stoichiometric excess of an organic diamine in an inert, non-polar solvent to form an amine-terminated oligomer-solvent mixture; (b) removing unrea... | 11/16/1993 |
| 5262512 | Polyarylamine polyesters A polyarylamine polymer represented by the following formula: ##STR1## wherein: n is between about 5 and about 5,000 p is between about 0 and about 5,000 X' and X" are independently selected from a group having bifunctional linkages, Q is a divalent group... | 11/16/1993 |
| 5189137 | Method for preparing a high molecular weight polyethermide polymer in a dual solvent system A method for preparing high molecular weight polyethermide polymers in a dual solvent system is disclosed. The inventive method provides for polymerizing a diamine monomer and a dianhydride monomer in a solvent system comprised of at least two solvents, a... | 02/23/1993 |
| 5162449 | Cycloalkene terminated polyarylene ether and polyarylene etherpolyalkenamer copolymers made therefrom Polyarylene ether-polyalkenamer copolymers are provided by effecting a ring-opening metathesis polymerization (ROMP) of a cycloalkene such as, cyclooctene in the presence of a polyarylene ether having an ester link cycloalkenyl group. An effective amount ... | 11/10/1992 |
| 5066766 | Process for the preparation of poly(ester-carbonates) Disclosed is a process for the preparation of poly(ester-carbonates) wherein (1) an aromatic diol, (2) methyl phenyl carbonate and (3) an alkyl carboxylate ester component selected from an aromatic dicarboxylate ester, a hydroxy aromatic carboxylate ester... | 11/19/1991 |
| 5037220 | Printing ribbon comprising polycondensates Films from aromatic polyesters and from aromatic polyestercarbonates are excellently suitable for preparing printing ribbons, in particular for thermal and electrothermal recording processes.... | 08/06/1991 |
| 4983709 | Aromatic compounds containing cyanate ester and propargyl ether groups New aromatic compounds containing at least one cyanate ester and at least one propargyl ether group, each independently directly attached to a ring carbon atom(s), are useful in the preparation of resins having a low dielectric constant.... | 01/08/1991 |
| 4959445 | Preparation of gray to blue aromatic polyesters by incorporation of cobalt into the catalyst system This invention relates to imparting gray, blue, or purple tints to aromatic copolyester compounds. This is accomplished through the addition of a cobalt-containing compound such as cobalt carbonate, cobalt acetate, cobalt benzoate, or cobalt phenate to th... | 09/25/1990 |
| 4959449 | Process for preparing low color polyarylates Polyarylates formed by reacting the diester of a dihydric phenol such as bisphenol-A and at least one aromatic dicarboxylic acid in the presence of an esterification catalyst is provided with improved color by the addition of cobalt during polymerization.... | 09/25/1990 |
| 4957996 | Preparation of polyarylate of improved color with cobalt salt Improved polyarylate color is achieved by dissolving in the polyarylate-forming reaction mixture a cobalt salt of an ester of a C3 to C20 aliphatic or iso-aliphatic hydrocarbon. The cobalt salt is preferably predissolved prior to add... | 09/18/1990 |
| 4906693 | Transesterification cure of thermosetting coatings Transesterification curing of ester polymers and hydroxyl polymers is effected by the inclusion of a transesterification catalyst comprising a catalytic amount of epoxy resin and certain inorganic salts.... | 03/06/1990 |
| 4849495 | Polyester resin from tri- or higher polycarboxylic acid for toner and process for its production A polyester resin for toner, which consists essentially of (a) from 5 to 60 equivalent %, based on the entire carboxylic acid components, of at least one member selected from the group consisting of tribasic and higher polybasic carboxylic acids, anhydrid... | 07/18/1989 |
| 4843140 | Aromatic polyesters based on phenoxyterephthalic acid, and methods of manufacturing and using same Aromatic polyesters based on phenoxyterephthalic acid, a method of manufacturing the same, and applications of the same. The inventive polyesters are based on phenoxyterephthalic acid, one or more other aromatic dicarboxylic acids, a dihydroxyaryl compoun... | 06/27/1989 |
| 4835243 | Thermotropic aromatic polymers with high elongation at break, processes for their preparation and their use for the production of moulded articles, filaments, fibres and films Thermotropic, fully aromatic polyesters based on p-hydroxybenzoic acid, aromatic dicarboxylic acid and diphenol in which the dicarboxylic acid groups consist at least in part of 3,3'-diphenyldicarboxylic acid groups have excellent mechanical properties, i... | 05/30/1989 |
| 4794157 | Polyetherimide copolymers, and method for making The intercondensation of aryldiamine and a mixture of oxydiphthalic anhydride and aromatic bis(ether anhydride), such as 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]-propane dianhydride, have been found to provide tough flexible transparent copolymer having T | 12/27/1988 |
| 4716211 | Slurry process for producing high molecular weight crystalline polyaryletherketones Described herein is an improved process for preparing poly(aryl ether ketones) by reacting nucleophilic coreactants with electrophilic coreactants under Friedel Crafts polymerization conditions, wherein the improvement comprises carrying out the polymeriz... | 12/29/1987 |
| 4710562 | Stabilizing polyaryletherketones Described herein is a process for stabilizing a poly(aryl ether ketone) produced by a Friedel-Crafts polymerization process which comprises adding a nucleophilic and/or an electrophilic capping agent during the polymerization.... | 12/01/1987 |
| 4686146 | Radiation-cured recording composition with bi-part lube A novel resinous binder composition is disclosed for a magnetic recording tape or like media. Magnetic particles are dispersed within a resinous matrix having both a "hard" and a "soft" component. The "hard" component is fabricated by exposing a resin cap... | 08/11/1987 |
