Viswanathan Kalyanaraman from 9344 Millicent Ct, Newburgh, IN 47630, age 58

Us Patents

Impact-Modified Molding Composition And Method
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US Patent:

20060270803, Nov 30, 2006
Filed:

May 26, 2005
Appl. No.:

11/138551
Inventors:

Sandeep Dhawan - Vienna WV, US
Albin Berzinis - Marietta OH, US
Viswanathan Kalyanaraman - Athens OH, US
International Classification:

C08F 297/02
US Classification:

525242000
Abstract:

A method is disclosed for preparing an acrylic-styrene-acrylonitrile (ASA) resin, which comprises the steps of: (a) polymerizing a mixture comprising at least one acrylate monomer and at least one crosslinking agent to form a rubber substrate, followed by (b) polymerizing a mixture of monomers in the presence of the rubber substrate, at least one of which monomers is selected from the group consisting of vinyl aromatic monomers and at least one of which monomers is selected from the group consisting of monoethylenically unsaturated nitrile monomers, and optionally followed by (c) polymerizing one or more monomers in at least one subsequent stage in the presence of the rubber substrate from (b), wherein the one or more monomers comprise at least one monomer selected from the group consisting of (C-C)alkyl- and aryl-(meth)acrylate monomers; wherein the amount of unreacted crosslinking agent remaining in the rubber substrate before step (b) is less than 5.6 micromoles per gram based on the dry weight of the rubber substrate. The invention also relates to a molding composition comprising an ASA resin comprising an elastomeric phase derived from a rubber substrate comprising structural units derived from at least one crosslinking agent; wherein the rubber substrate comprises less than 5.6 micromoles of unreacted crosslinking agent per gram of rubber substrate based on dry weight of the rubber substrate. Articles comprising said ASA resin and/or made from said molding composition are also disclosed.

Method For Decreasing Gloss In Molded Article
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US Patent:

20070112144, May 17, 2007
Filed:

Feb 23, 2006
Appl. No.:

11/360782
Inventors:

Viswanathan Kalyanaraman - Athens OH, US
Charles Lewis - Lewis Center OH, US
International Classification:

C08L 69/00
US Classification:

525466000, 525468000
Abstract:

In one embodiment the present invention relates to a method for decreasing the gloss in a molded article comprising (i) at least one polycarbonate; (ii) at least one polyester; and (iii) at least one rubber modified thermoplastic resin; wherein the molded article exhibits a heat deflection temperature of at least 85 C. as measured at 1.8 MPa according to ISO 75, and a gloss value of less than or equal to about 3 as measured at an angle of 60; and wherein the method comprises the step of preparing the article by molding using a textured mold at a mold temperature of greater than about 65 C. In other embodiments the present invention relates to molded articles.

Impact-Modified Molding Composition And Method
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US Patent:

20100093915, Apr 15, 2010
Filed:

May 20, 2009
Appl. No.:

12/469437
Inventors:

Albin Peter Berzinis - Delmar NY, US
Sandeep Dhawan - Newburgh IN, US
Viswanathan Kalyanaraman - Athens OH, US
International Classification:

C08L 51/04
C08F 255/00
US Classification:

524523, 525308, 525 84, 524504
Abstract:

A method is disclosed for preparing an acrylic-styrene-acrylonitrile (ASA) resin, which comprises the steps of: (a) polymerizing a mixture comprising at least one acrylate monomer and at least one polyethylenically unsaturated monomer to form a rubber substrate, followed by (b) polymerizing a mixture of monomers in the presence of the rubber substrate, at least one of which monomers is selected from the group consisting of vinyl aromatic monomers and at least one of which monomers is selected from the group consisting of monoethylenically unsaturated nitrile monomers, and optionally followed by (c) polymerizing one or more monomers in at least one subsequent stage in the presence of the rubber substrate from (b), wherein the one or more monomers comprise at least one monomer selected from the group consisting of (C-C)alkyl- and aryl-(meth)acrylate monomers; wherein the amount of unreacted polyethylenically unsaturated monomer remaining in the rubber substrate before step (b) is less than 5.6 micromoles per gram based on the dry weight of the rubber substrate. The invention also relates to a molding composition comprising an ASA resin comprising an elastomeric phase derived from a rubber substrate comprising structural units derived from at least one polyethylenically unsaturated monomer; wherein the rubber substrate comprises less than 5.6 micromoles of unreacted polyethylenically unsaturated monomer per gram of rubber substrate based on dry weight of the rubber substrate. Articles comprising said ASA resin and/or made from said molding composition are also disclosed.

Fast Dissolving Polyimide Powders
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US Patent:

20120245239, Sep 27, 2012
Filed:

Mar 25, 2011
Appl. No.:

13/072559
Inventors:

Viswanathan Kalyanaraman - Newburgh IN, US
William E. Hollar - Mt Vernon IN, US
International Classification:

C08G 73/10
C08L 35/00
C08L 63/00
B32B 5/16
C08J 9/28
US Classification:

521 54, 428402, 521 64, 521184
Abstract:

Polyetherimide particles or powders with a high surface area and high porosity can be prepared by precipitation of polymer solution in hot water or steam without the use of any additives. The particles or powders produced rapidly dissolved in organic solvents as well as epoxy matrices.

Thermoplastic Composition Providing A Low Gloss, Textured Surface, And Method
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US Patent:

20050228130, Oct 13, 2005
Filed:

Apr 12, 2004
Appl. No.:

10/822620
Inventors:

Viswanathan Kalyanaraman - Athens OH, US
Charles Lewis - Parkersburg WV, US
Zhen Zhu - Amherst NY, US
International Classification:

C08L063/00
US Classification:

525067000
Abstract:

The present invention relates to a thermoplastic composition comprising (i) at least one polycarbonate; (ii) at least one polyester; and (iii) at least one rubber modified thermoplastic resin; wherein a molded article comprising the composition exhibits a heat deflection temperature of at least 85 C. as measured at 1.8 MPa according to ISO 75, and a gloss value of less than or equal to about 3 as measured at an angle of 60, wherein the said composition is molded using a textured mold at a mold temperature of greater than about 58 C. Articles made from the composition and a method for preparing the composition are also provided.

Polymer-Ceramic Composite Housings And Housing Components For Portable Electronic Devices
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US Patent:

20220411602, Dec 29, 2022
Filed:

Oct 9, 2020
Appl. No.:

17/754691
Inventors:

- Bergen op Zoom, NL
Chiel Albertus LEENDERS - Bergen op Zoom, NL
Gabriel Julianus Maria HOOGLAND - Bergen op Zoom, NL
Viswanathan KALYANARAMAN - Newburgh IN, US
Cameron YOUNGSTROM - Washington WV, US
Assignee:

SHPP Global Technologies B.V. - Bergen op Zoom
International Classification:

C08K 3/22
B32B 5/26
B32B 5/12
B29C 45/00
B29C 45/16
B29C 45/72
H05K 5/02
Abstract:

The present disclosure includes thin, high-stiffness laminates, portable electronic device housings including the same, and methods for making such laminates and portable electronic device housings. Some laminates include an inner section having one or more first laminae and one or more second laminae, and first and second outer sections disposed on opposing sides of the inner section, each having one or more third laminae The laminate has a width and a length that is perpendicular to the width. Each of the first lamina(e) can have fibers aligned in a direction parallel to the length, each of the second lamina(e) can have fibers aligned in a direction parallel to the width, and each of the third lamina(e) can have fibers aligned in a direction angnlarly disposed at an angle of at least 10 degrees to each of the length and the width.

Method Of Modifying A Polyimide And The Polyimide Resulting Therefrom
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US Patent:

20200231753, Jul 23, 2020
Filed:

Sep 19, 2018
Appl. No.:

16/647780
Inventors:

- Bergen op Zoom, NL
Viswanathan Kalyanaraman - Newburgh IN, US
Kelly Leung - Evansville IN, US
Thomas Link Guggenheim - Mt. Vernon IN, US
International Classification:

C08G 73/10
Abstract:

A method for modifying a polyimide includes reacting a first polyimide with an amine to produce a second polyimide having an anhydride-amine stoichiometry of −2 to −40 mol % and reacting the second polyimide with a monoanhydride, a bis(anhydride), a bis(ether anhydride) or a tetracarboxylic acid to produce a final polyimide having an anhydride-amine stoichiometry of −1 to 2 mol %.

Process For The Manufacture Of Flame Retardant Polycarbonate Particles And Flame Retardant Polycarbonate Particles Prepared Thereby
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US Patent:

20200223989, Jul 16, 2020
Filed:

Sep 7, 2018
Appl. No.:

16/629115
Inventors:

- Bergen op Zoom, NL
Viswanathan Kalyanaraman - Newburgh IN, US
Rahul Patil - Evansville IN, US
Kapil Inamdar - Chester Springs PA, US
Zachary Anderson - Evansville IN, US
William E. Hollar - Mount Vernon IN, US
Sasi Sethumadhavan Kannamkumarath - Evansville IN, US
International Classification:

C08J 3/14
C08J 3/20
C08K 5/5333
C08K 5/5399
Abstract:

A process for the manufacture of polycarbonate particles is disclosed herein. The process includes combining a first solution including a polycarbonate and a phosphorus-containing flame retardant or a flame retardant polycarbonate, and an organic solvent with a second solution including a surfactant and an aqueous solvent substantially immiscible with the organic solvent, under conditions of shear and temperature effective to provide an emulsion. At least a portion of the organic solvent is removed from the emulsion to provide an aqueous slurry having a plurality of particles, wherein the particles include the polycarbonate and the phosphorus-containing flame retardant or the flame retardant polycarbonate.