Patents by Inventor David M. Derikart
David M. Derikart has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7504054Abstract: In the method of the present invention at least a portion of the surface of a plastic article (e.g., a molded article of thermoplastic polycarbonate) is contacted with (e.g., immersed in) a treatment composition which includes one or more performance additives. The treatment composition contains: (i) at least one performance additive (e.g., an ultraviolet light absorber); (ii) water; (iii) at least one carrier represented by the following general formula I, wherein R1 is a radical selected from the group consisting of linear or branched C1-C18 alkyl, benzyl, benzoyl and phenyl, R2 is a radical selected from the group consisting of linear or branched C1-C18 alkyl, benzyl, benzoyl, phenyl and H, n is 2, 3 or 4, and m is 1 to 35; and (iv) a diol selected from at least one of linear or branched C2-C20 aliphatic diols, poly(C2-C4 alkylene glycol), cycloaliphatic diols having from 5 to 8 carbon atoms in the cyclic ring, monocyclic aromatic diols, bisphenols and hydrogenated bisphenols.Type: GrantFiled: December 11, 2003Date of Patent: March 17, 2009Assignee: Bayer MaterialScience LLCInventors: Robert A. Pyles, Rick L. Archey, David M. Derikart
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Patent number: 7175675Abstract: In the method of the present invention a plastic article (e.g., a molded article of thermoplastic polycarbonate) is immersed at least partially in a dye bath which includes one or more dyes, water, at least one carrier, and at least one diol. The dye bath contains: (i) at least one dye (e.g., a static and/or photochromic dye); (ii) water; (iii) at least one carrier represented by the following general formula I, R—O—(CH2)n—OHI wherein R is a radical selected from linear or branched C1–C18 alkyl, benzyl, benzoyl and phenyl, and n is 2 or 3; and (iv) a diol selected from at least one of linear or branched C2–C20 aliphatic diols, poly(C2–C4 alkylene glycol), cycloaliphatic diols having from 5 to 8 carbon atoms in the cyclic ring, monocyclic aromatic diols, bisphenols and hydrogenated bisphenols. In an embodiment of the present invention, the carrier is ethyleneglycol butyl ether, and the diol is diethylene glycol.Type: GrantFiled: December 11, 2003Date of Patent: February 13, 2007Assignee: Bayer MaterialScience LLCInventors: Robert A. Pyles, Rick L. Archey, David M. Derikart
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Patent number: 7041732Abstract: A compatible blend of polycarbonate resin with a vinyl (co)polymer blending partner is disclosed. The preparation of inventive blend comprise reactive blending of polycarbonate, a vinyl (co)polymer and a novel compatibilizer in the presence of a transesterification catalyst and under conditions of time and temperature designed to promote transesterification. The compatibilizer is the polymerized reaction product of at least one vinyl monomer that contains no hydroxy groups and a hydroxyl containing monomer conforming to (I) where R denotes H or C1–C4 alkyl, R1 denotes H, Cl, Br, C1–C4 alkyl, cyclohexyl, or C1–C4 alkoxy, a is 0 or 1, b is 0 or 1, c is 0 or 1, n is an integer of 0 to 4 and X is an OH group. The compatible blends of the invention are characterized by their improved properties.Type: GrantFiled: December 8, 2003Date of Patent: May 9, 2006Assignee: Bayer MaterialScience LLCInventors: Daniel H. Bolton, Pierre Moulinie, David M. Derikart, Nicanor Kohncke
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Patent number: 6994735Abstract: A process for tinting a molded article is disclosed. The process entails applying by spraying or by flow coating a hot, dye-solution onto at least a portion of the surface of a molded article to obtain a tinted article and washing the tinted article. In addition to the dissolved dye, the dye solution that is substantially free of particulate matter contains an aqueous solution of a carrier and an optional emulsifier. The article is one molded of a thermoplastic molding composition. In an embodiment of the invention, the dye solution is prepared by filtering a hot aqueous solution through a bag filter that contains a dye to obtain a hot, dye-solution. In a further embodiment, activated carbon is used to purify the dye solution to obtain a dye-free aqueous solution.Type: GrantFiled: May 8, 2003Date of Patent: February 7, 2006Assignee: Bayer Materialscience LLCInventors: Robert A. Pyles, David M. Derikart, Rick L. Archey, Michael Nikolakopoulos
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Publication number: 20040221403Abstract: A process for tinting a molded article is disclosed. The process entails applying by spraying or by flow coating a hot, dye-solution onto at least a portion of the surface of a molded article to obtain a tinted article and washing the tinted article. In addition to the dissolved dye, the dye solution that is substantially free of particulate matter contains an aqueous solution of an organic solvent and a surfactant. The article is one molded of a thermoplastic molding composition. In an embodiment of the invention, the dye solution is prepared by filtering a hot aqueous solution through a bag filter that contains a dye to obtain a hot, dye-solution. In a further embodiment, activated carbon is used to purify the dye solution to obtain a dye-free aqueous solution.Type: ApplicationFiled: May 8, 2003Publication date: November 11, 2004Inventors: Robert A. Pyles, David M. Derikart, Rick L. Archey, Michael Nikolakopoulos
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Publication number: 20040116624Abstract: A compatible blend of polycarbonate resin with a vinyl (co)polymer blending partner is disclosed. The preparation of inventive blend comprise reactive blending of polycarbonate, a vinyl (co)polymer and a novel compatibilizer in the presence of a transesterification catalyst and under conditions of time and temperature designed to promote transesterification.Type: ApplicationFiled: December 8, 2003Publication date: June 17, 2004Inventors: Daniel H. Bolton, Pierre Moulinie, David M. Derikart, Nicanor Kohncke
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Patent number: 6670420Abstract: A compatible blend of polycarbonate resin with a vinyl (co)polymer blending partner is disclosed. The preparation of inventive blend comprise reactive blending of polycarbonate, a vinyl (co)polymer and a novel compatibilizer in the presence of a transesterification catalyst and under conditions of time and temperature designed to promote transesterification. The compatibilizer is the polymerized reaction product of at least one vinyl monomer that contains no hydroxy groups and a hydroxyl containing monomer conforming to (I) where R denotes H or C1-C4 alkyl, R1 denotes H, Cl, Br, C1-C4 alkyl, cyclohexyl, or C1-C4 alkoxy, a is 0 or 1, b is 0 or 1, c is 0 or 1, n is an integer of 0 to 4 and X is an OH group. The compatible blends of the invention are characterized by their improved properties.Type: GrantFiled: January 18, 2002Date of Patent: December 30, 2003Assignee: Bayer CorporationInventors: Daniel H. Bolton, Pierre Moulinie, David M. Derikart, Nicanor Kohncke
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Publication number: 20020183447Abstract: A compatible blend of polycarbonate resin with a vinyl (co)polymer blending partner is disclosed. The preparation of inventive blend comprise reactive blending of polycarbonate, a vinyl (co)polymer and a novel compatibilizer in the presence of a transesterification catalyst and under conditions of time and temperature designed to promote transesterification.Type: ApplicationFiled: January 18, 2002Publication date: December 5, 2002Inventors: Daniel H. Bolton, Pierre Moulinie, David M. Derikart, Nicanor Kohncke
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Patent number: 6197853Abstract: A thermoplastic polycarbonate molding composition having improved resistance to gamma radiation-induced yellowing is disclosed. Particularly suitable for the manufacture of devices geared for medical applications, the composition contains an additive amount of a stabilizing compound conforming structurally to where R1 denotes a C1-30-alkyl group and R2 denotes an aryl radical.Type: GrantFiled: July 1, 1999Date of Patent: March 6, 2001Assignee: Bayer CorporationInventors: Daniel H. Bolton, Sivaram Krishnan, David M. Derikart, James B. Johnson
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Patent number: 6046301Abstract: A transparent thermoplastic molding composition having good release properties is disclosed. The composition which contains no magnetic elements contains a polycarbonate resin and 0.01 to 0.3 percent by weight of a mold release agent. The agent is the product of a reaction of a compound represented by formula (I) ##STR1## where R.sub.1 denotes a C.sub.1-30 -alkyl group, with at least one member selected from the group consisting of ##STR2## where R.sub.2 and R.sub.3 independently denote C.sub.1-30 - alkyl or an aryl group, and ##STR3## where n is 1-7.Type: GrantFiled: April 12, 1999Date of Patent: April 4, 2000Assignees: Bayer Corporation, Bayer AktiengesellschaftInventors: Daniel H. Bolton, Sivaram Krishnan, Jon M. Newcome, Jeffrey M. Tennant, David M. Derikart, Ramesh M. Pisipati, Wolfgang Ebert