Patents Represented by Attorney Sudhir G. Deshmukh
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Patent number: 5820993Abstract: The present invention is directed to a method of producing wear resistant traffic paint composition. In accordance with the method, a traffic marking of a traffic paint composition having low GPC number average molecular weight latex binder when applied to the road surface exhibits improved wear resistance over those traffic paint compositions having high GPC number average molecular weight latex binders. The wear resistance is further enhanced by modifying the latex polymer used in the composition with acetoacetyl functional pendant moiety and amino silane.Type: GrantFiled: May 6, 1997Date of Patent: October 13, 1998Inventors: Donald Craig Schall, Alvin Charles Lavoie, Francis Joseph Landy, Steven Scott Edwards
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Patent number: 5816128Abstract: A device for severing flexible polymeric tube, pipe, or tubular extrudate, such as flexible light pipe, reproducibly, cleanly, and safely is described. The device comprises a block with two specially aligned cylindrical devices for holding the pipe and a slot between the devices for guiding the severing blade with minimum deviation from its path, and a pivot and mounting upon which a blade in a holder is mounted to give even more accurate and uniform control of the path of the severing action.Type: GrantFiled: August 22, 1996Date of Patent: October 6, 1998Assignee: Rohm and Haas CompanyInventors: Andrew Bruce Walter Bigley, Jr., Edward G. Ludwig, Jr., Ramon Calisto Perez, Niels Haun
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Patent number: 5807409Abstract: The present invention provides for a method of improving the pull-up characteristic of a leather substrate darkened with a finishing oil modified by dissolving a modifier in a conventional finishing oil. The modifier may be polymerized from a monomer mix of alkyl acrylates and alkyl methacrylates. Improved pull-up characteristic of a leather substrate is esthetically very appealing and is highly desired by a consumer. The modifier of the present invention increases the viscosity of the finishing oil, thereby extending the open time, which is a time duration during which the oil applied over the leather substrate surface stays on the surface. Increased open time permits a manufacturer to spread the oil over more area of the leather substrate than conventional unmodified finishing oils, without substantially affecting the pull-up characteristic of a leather substrate darkened with the finishing oil.Type: GrantFiled: October 30, 1996Date of Patent: September 15, 1998Assignee: Rohm and Haas CompanyInventors: John Shaftoe Moore, Robert Howard Gore, John Hawthorn
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Patent number: 5804627Abstract: A shelf-stable fast-cure aqueous coating is disclosed. The coating contains an anionically stabilized latex, a polyfunctional amine and a volatile base in an amount sufficient to deprotonate the conjugate acid of the amine.Type: GrantFiled: January 28, 1997Date of Patent: September 8, 1998Assignee: Rohm and Haas CompanyInventors: Frank Landy, Andrew Mercurio, Roy Flynn
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Patent number: 5786072Abstract: This invention relates to a method for preparing wood composition board, such as hard board, fabricated consolidating fibers or chips under heat and pressure to form an integral board material. More particularly, this invention relates to an improved method for applying a clear or pigmented prepress coating, also known as a prepress sealer, to the surface of a fibrous mat by converting the prepress sealer into foam prior to subjecting the mat to a temperature and pressure press treatment.Type: GrantFiled: November 19, 1996Date of Patent: July 28, 1998Inventors: Oscar Hsien-Hsiang Hsu, Anthony Eugene Schiavone
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Patent number: 5780117Abstract: Radiation-curable latex compositions having a secondary curing mechanism are disclosed. In these compositions, an anionically stabilized, water-borne dispersion of one or more radiation-curable resins is combined with a low molecular weight compound having at least two reactive functional groups, wherein one reactive functional group comprises an epoxy and the other reactive functional group comprises either an epoxy or a functionality capable of self-condensation after film formation. Also disclosed is a method for providing a cross-linked protective coating on a substrate, wherein a coating of the composition of the present invention is applied to the substrate, the coated substrate is exposed to actinic radiation to effect curing, and then the unexposed or underexposed portions of the coated substrate are allowed to cure at room temperature or greater.Type: GrantFiled: February 25, 1997Date of Patent: July 14, 1998Assignee: Rohm and Haas CompanyInventors: Andrew Joseph Swartz, Kurt Arthur Wood
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Patent number: 5741823Abstract: The present invention is directed to producing a smooth hard coating on a wood substrate. A layer of a foamed polymerized latex emulsion is applied on the surface of a wood substrate, such as an oriented strand board. The layer is dried, crushed and then cured to form the coating. If desired the cured coating may be provided with a post cure heat treatment to improve its hardness. The present invention is also directed to applying and drying the layer of the foamed polymerized latex emulsion on a mat of wood fibers or flakes and then crushing and curing the crushed layer and the mat into a hardboard having a smooth hard coating. The coating of the present invention is useful as a sealer coat on a wood substrate. By adding pigment to polymerized emulsion, the sealer coat can be used to provide a finish coat on the wood substrate.Type: GrantFiled: August 27, 1996Date of Patent: April 21, 1998Assignee: Rohm and Haas CompanyInventor: Oscar Hsien-Hsiang Hsu
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Patent number: 5718943Abstract: The present invention is directed to producing an efflorescence resistant sealer coating on a cementitious substrate, such as, a roof tile. A foamed layer of an efflorescence resistant coating composition is preferably applied on the surface of a wet cementitious substrate. The wet cementitious substrate is then hydrated to produce the cementitious substrate having the efflorescence resistant coating thereon. If desired, the efflorescence resistant coating composition is provided with a pigment to produce a pigmented efflorescence resistant coating on the cementitious substrate or a clear efflorescence resistant coating of the present invention may be applied over pigmented cementitious substrate. The efflorescence resistant coating produced in accordance with the process of the present invention substantially reduces the formation of esthetically unpleasant efflorescent layer on cementitious substrate surfaces.Type: GrantFiled: July 2, 1996Date of Patent: February 17, 1998Assignee: Rohm and Haas CompanyInventors: Oscar Hsien-Hsiang Hsu, Richard Barry Matt
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Patent number: 5709714Abstract: The present invention is directed to a method of treating tanned leather stock to improve its color expression characteristics. The method provides for utilizing a two-stage amphoteric polymers, which improve the color expression characteristic of the tanned leather stock while still retaining desired grain break and tensile strength. The tanned leather stock is contacted, preferably by immersion, in a float containing particles of an amphoteric polymer dispersed therein and a desired colorant. The amphoteric polymer particles comprise a first stage copolymer polymerized from at least one monomer containing an anionic functionality, such as, an acid functionality, with at least one first stage comonomer and a second stage copolymer polymerized from at least one monomer containing the cationic functionality, such as, an amine functionality, with at least one second stage comonomer.Type: GrantFiled: February 12, 1997Date of Patent: January 20, 1998Assignee: Rohm and Haas CompanyInventors: John Natoli, Anthony Frank Volpe, Jr.
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Patent number: 5695823Abstract: This invention relates to a method for preparing wood composition board, such as hard board, fabricated consolidating fibers or chips under heat and pressure to form an integral board material. More particularly, this invention relates to an improved method for applying a clear or pigmented prepress coating, also known as a prepress sealer, to the surface of a fibrous mat by converting the prepress sealer into foam prior to subjecting the mat to a temperature and pressure press treatment.Type: GrantFiled: April 3, 1995Date of Patent: December 9, 1997Assignee: Rohm and Haas CompanyInventors: Oscar Hsien-Hsiang Hsu, Anthony Eugene Schiavone
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Patent number: 5672379Abstract: The present invention is directed to a method of producing wear resistant traffic paint composition. In accordance with the method, a traffic marking of a traffic paint composition having low GPC number average molecular weight latex binder when applied to the road surface exhibits improved wear resistance over those traffic paint compositions having high GPC number average molecular weight latex binders. The wear resistance is further enhanced by modifying the latex polymer used in the composition with acetoacetyl functional pendant moiety and amino silane.Type: GrantFiled: July 26, 1996Date of Patent: September 30, 1997Assignee: Rohm and Haas CompanyInventors: Donald Craig Schall, Alvin Charles Lavoie, Francis Joseph Landy, Steven Scott Edwards
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Patent number: 5652024Abstract: A multi-component waterborne corrosion resistant coating composition used as an organic zinc rich primer for protecting metal substrate from corrosion. The composition includes zinc dust, a crosslinking component and a polymeric component produced from a low Tg polymer and an amine functional curing agent. These components of the composition are stored separately and then mixed prior to applying the coat of the composition over metal substrate.The coating composition of the present invention has longer pot life than conventional waterborne corrosion resistant coating composition.Type: GrantFiled: May 14, 1996Date of Patent: July 29, 1997Assignee: Rohm and Haas CompanyInventors: Timothy Parker Sanborn, Joseph Michael Beno, Jr., Roy Wesley Flynn
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Patent number: 5635248Abstract: The present invention is directed to producing a smooth hard coating on a wood substrate. A layer of a foamed polymerized latex emulsion is applied on the surface of a wood substrate, such as an oriented strand board. The layer is dried, crushed and then cured to form the coating. If desired the cured coating may be provided with a post cure heat treatment to improve its hardness. The present invention is also directed to applying and drying the layer of the foamed polymerized latex emulsion on a mat of wood fibers or flakes and then crushing and curing the crushed layer and the mat into a hardboard having a smooth hard coating. The coating of the present invention is useful as a sealer coat on a wood substrate. By adding pigment to polymerized emulsion, the sealer coat can be used to provide a finish coat on the wood substrate.Type: GrantFiled: June 7, 1995Date of Patent: June 3, 1997Assignees: Rohm and Haas Company, Akzo-Nobel Coatings, Inc.Inventors: Oscar H. Hsu, Gerard M. Currier, Philip H. Moes
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Patent number: 5633314Abstract: An aqueous aerosol coating composition, which includes a thermoplastic acrylic polymer solubilized in an aqueous solution of a monohydric alcohol. The coating composition may further be blended with a controlling amount of a water soluble or water reducible acrylic polymer for imparting a desired degree of gloss and alkali resistance to a coating made from the aqueous aerosol coating composition. The compositions of this invention provide for improved drying rates, hardness and alkali resistance over current aqueous systems.Type: GrantFiled: June 6, 1995Date of Patent: May 27, 1997Assignee: Rohm and Haas CompanyInventor: Homayoun Jamasbi
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Patent number: 5626422Abstract: A method is disclosed for preparing a homogeneous solution of a powder, particularly hard-to-wet polymer powders, which includes:(1) feeding simultaneously a powder and a liquid solvent for the powder to a high-speed in-line mixer minimizing contact between said powder and said liquid solvent before said powder and said liquid solvent enter said mixer;(2) mixing said powder and said liquid solvent in said mixer to form a dispersion of said powder in said liquid solvent; and(3) dissolving said dispersed powder in said solvent.Type: GrantFiled: July 8, 1994Date of Patent: May 6, 1997Assignee: Rohm and Haas CompanyInventors: Joseph R. Adamo, Gloria M. Lipovsky, Robert Hecker, Jr., Leon D. Ranalli
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Patent number: 5616419Abstract: The present invention is directed to producing a smooth hard coating on a wood substrate. A layer of a foamed polymerized latex emulsion is applied on the surface of a wood substrate, such as an oriented strand board. The layer is dried, crushed and then cured to form the orating. If desired the cured coating may be provided with a post cure heat treatment to improve its hardness. The present invention is also directed to applying and drying the layer of the foamed polymerized latex emulsion on a mat of wood fibers or flakes and then crushing and curing the crushed layer and the mat into a hardboard having a smooth hard coating. The coating of the present invention is useful as a sealer coat on a wood substrate. By adding pigment to polymerized emulsion, the sealer coat can be used to provide a finish coat on the wood substrate.Type: GrantFiled: April 19, 1996Date of Patent: April 1, 1997Assignees: Rohm and Haas Company, Akzo Nobel Inc.Inventors: Oscar Hsien-Hsiang Hsu, Gerard M. Currier, Philip H. Moes
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Patent number: 5569687Abstract: A multi-component waterborne corrosion resistant coating composition used as an organic zinc rich primer for protecting metal substrate from corrosion. The composition includes zinc dust, a crosslinking component and a polymeric component produced from a low Tg polymer and an amine functional curing agent. These components of the composition are stored separately and then mixed prior to applying the coat of the composition over metal substrate.The coating composition of the present invention has longer pot life than conventional waterborne corrosion resistant coating composition.Type: GrantFiled: March 16, 1995Date of Patent: October 29, 1996Assignee: Rohm and Haas CompanyInventors: Timothy P. Sanborn, Joseph M. Beno, Jr., Roy W. Flynn
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Patent number: 5534310Abstract: A latex binder suitable for producing high gloss coating on weathered substrates and a method for producing such coatings. The binder includes a low molecular weight and low acid number latex polymer having an acid functional and an enamine functional moiety that results from the reaction of ammonia or amine with an acetoacetyl functional pendant moiety on the latex polymer. A film containing the latex binder is applied on a substrate and then exposed to ambient light and air to produce a high gloss highly adherent film on difficult to adhere surfaces, such as weathered chalky substrates.Type: GrantFiled: June 6, 1995Date of Patent: July 9, 1996Assignee: Rohm and Haas CompanyInventors: Joseph M. Rokowski, William C. Finch
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Patent number: 5527853Abstract: A shelf-stable fast-cure aqueous coating is disclosed. The coating contains an anionically stabilized latex, a polyfunctional amine and a volatile base in an amount sufficient to deprotonate the conjugate acid of the amine.Type: GrantFiled: November 14, 1994Date of Patent: June 18, 1996Assignee: Rohm and Haas CompanyInventors: Frank Landy, Andrew Mercurio, Roy Flynn
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Patent number: RE36042Abstract: A shelf-stable fast-cure aqueous coating is disclosed. The coating contains an anionically stabilized latex, a polyfunctional amine and a volatile base in an amount sufficient to deprotonate the conjugate acid of the amine.Type: GrantFiled: May 2, 1997Date of Patent: January 12, 1999Assignee: Rohm and Haas CompanyInventors: Francis Joseph Landy, Andrew Mercurio, Roy Wesley Flynn