Resumes
Resumes
David Derikart Phones & Addresses
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101 Yost Dr, Tarentum, PA 15084
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1421 Cambridge St, Natrona Heights, PA 15065
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Miamisburg, OH
Emails
Publications
Us Patents
Compatible Blend Of Polycarbonate With Vinyl (Co)Polymer
View pageUS Patent:
6670420, Dec 30, 2003
Filed:
Jan 18, 2002
Appl. No.:
10/053261
Inventors:
Daniel H. Bolton - Aliquippa PA
Pierre Moulinie - Imperial PA
David M. Derikart - Tarentum PA
Nicanor Kohncke - Pittsburgh PA
Pierre Moulinie - Imperial PA
David M. Derikart - Tarentum PA
Nicanor Kohncke - Pittsburgh PA
Assignee:
Bayer Corporation - Pittsburgh PA
International Classification:
C08L 6900
US Classification:
525 67, 525133, 525146, 525148
Abstract:
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 C -C alkyl, R denotes H, Cl, Br, C -C alkyl, cyclohexyl, or C -C 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.
Process For Tinting Plastic Articles
View pageUS Patent:
6994735, Feb 7, 2006
Filed:
May 8, 2003
Appl. No.:
10/434242
Inventors:
Robert A. Pyles - Bethel Park PA, US
David M. Derikart - Tarentum PA, US
Rick L. Archey - Pleasant Hills PA, US
Michael Nikolakopoulos - Pittsburgh PA, US
David M. Derikart - Tarentum PA, US
Rick L. Archey - Pleasant Hills PA, US
Michael Nikolakopoulos - Pittsburgh PA, US
Assignee:
Bayer Materialscience LLC - Pittsburgh PA
International Classification:
D06P 1/613
US Classification:
8609, 8506, 8509, 8510, 8512, 8513, 8514, 8515
Abstract:
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.
Compatible Blend Of Polycarbonate With Vinyl (Co)Polymer
View pageUS Patent:
7041732, May 9, 2006
Filed:
Dec 8, 2003
Appl. No.:
10/730518
Inventors:
Daniel H. Bolton - Aliquippa PA, US
Pierre Moulinie - Imperial PA, US
David M. Derikart - Tarentum PA, US
Nicanor Kohncke - Pittsburgh PA, US
Pierre Moulinie - Imperial PA, US
David M. Derikart - Tarentum PA, US
Nicanor Kohncke - Pittsburgh PA, US
Assignee:
Bayer MaterialScience LLC - Pittsburgh PA
International Classification:
C08L 69/00
US Classification:
525 67, 525133, 525146, 525148
Abstract:
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 C–Calkyl, Rdenotes H, Cl, Br, C–Calkyl, cyclohexyl, or C–Calkoxy, 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.
Method Of Dyeing A Plastic Article
View pageUS Patent:
7175675, Feb 13, 2007
Filed:
Dec 11, 2003
Appl. No.:
10/733111
Inventors:
Robert A. Pyles - Bethel Park PA, US
Rick L. Archey - Pleasant Hills PA, US
David M. Derikart - Tarentum PA, US
Rick L. Archey - Pleasant Hills PA, US
David M. Derikart - Tarentum PA, US
Assignee:
Bayer MaterialScience LLC - Pittsburgh PA
International Classification:
D06P 5/00
US Classification:
8506, 8509, 8510, 8514, 8515, 8516, 8611
Abstract:
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—(CH)—OHIwherein R is a radical selected from linear or branched C–Calkyl, benzyl, benzoyl and phenyl, and n is 2 or 3; and (iv) a diol selected from at least one of linear or branched C–Caliphatic diols, poly(C–Calkylene 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. The present invention also relates to a method of separating the dye from the water, carrier and diol components of the dye bath, by contacting the dye bath with particulate activated carbon.
Method Of Treating A Plastic Article
View pageUS Patent:
7504054, Mar 17, 2009
Filed:
Dec 11, 2003
Appl. No.:
10/733657
Inventors:
Robert A. Pyles - Bethel Park PA, US
Rick L. Archey - Pleasant Hills PA, US
David M. Derikart - Pittsburgh PA, US
Rick L. Archey - Pleasant Hills PA, US
David M. Derikart - Pittsburgh PA, US
Assignee:
Bayer MaterialScience LLC - Pittsburgh PA
International Classification:
B05D 1/18
B05D 1/38
G02C 7/02
B05D 1/38
G02C 7/02
US Classification:
264 26, 264 27, 427164, 427158
Abstract:
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,.
Method Of Dyeing A Semi-Finished Product
View pageUS Patent:
20070079453, Apr 12, 2007
Filed:
Dec 5, 2006
Appl. No.:
11/633797
Inventors:
Robert Pyles - Bethel Park PA, US
Rick Archey - Pleasant Hills PA, US
David Derikart - Tarentum PA, US
Rick Archey - Pleasant Hills PA, US
David Derikart - Tarentum PA, US
International Classification:
D06P 5/00
US Classification:
008506000
Abstract:
A method of dyeing a semi-finished product is disclosed. The method comprise: (a) providing a semi-finished product selected from the group consisting of powders, pellets and strands, that contain at least one thermoplastic polymer; (b) immersing said semi-finished product in a dye bath comprising, (i) at least one dye, (ii) water, (iii) at least one carrier represented by the following general formula I, (I) R[O(CH)]OR
Polycarbonate Compositions Having Reduced Tendency To Splay
View pageUS Patent:
60463015, Apr 4, 2000
Filed:
Apr 12, 1999
Appl. No.:
9/290906
Inventors:
Daniel H. Bolton - Beaver Falls PA
Sivaram Krishnan - Pittsburgh PA
Jon M. Newcome - Aliquippa PA
Jeffrey M. Tennant - New Cumberland WV
David M. Derikart - Natrona Heights PA
Ramesh M. Pisipati - Wexford PA
Wolfgang Ebert - Krefeld, DE
Sivaram Krishnan - Pittsburgh PA
Jon M. Newcome - Aliquippa PA
Jeffrey M. Tennant - New Cumberland WV
David M. Derikart - Natrona Heights PA
Ramesh M. Pisipati - Wexford PA
Wolfgang Ebert - Krefeld, DE
Assignee:
Bayer Corporation - Pittsburgh PA
Bayer Aktiengesellschaft - Leverkusen
Bayer Aktiengesellschaft - Leverkusen
International Classification:
C08G 6400
US Classification:
528198
Abstract:
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.
Polycarbonate Composition Resistant To Gamma Radiation
View pageUS Patent:
61978531, Mar 6, 2001
Filed:
Jul 1, 1999
Appl. No.:
9/346238
Inventors:
Daniel H. Bolton - Beaver Falls PA
Sivaram Krishnan - Pittsburgh PA
David M. Derikart - Natrona Heights PA
James B. Johnson - Washington PA
Sivaram Krishnan - Pittsburgh PA
David M. Derikart - Natrona Heights PA
James B. Johnson - Washington PA
Assignee:
Bayer Corporation - Pittsburgh PA
International Classification:
C08K 515
US Classification:
524108
Abstract:
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 ##STR1## where R. sub. 1 denotes a C. sub. 1-30 -alkyl group and R. sub. 2 denotes an aryl radical.