Patents by Inventor Robert A. Laitar

Robert A. Laitar 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).

  • Patent number: 9890295
    Abstract: This invention relates to a resin preparable by reaction of a phenol/formaldehyde novolak with tetraethyl orthosilicate in a mass ratio above 28:1, wherein the phenol of the phenol/formaldehyde novolak is substituted or unsubstituted hydroxybenzene or a mixture of two or more such phenols, and to a particulate material coated with said resin. Said particles can be used e.g. in the shell molding process for the production of shell molds and shell cores; and as proppants for use in the hydraulic fracturing process.
    Type: Grant
    Filed: April 20, 2012
    Date of Patent: February 13, 2018
    Assignee: HUTTENES-ALBERTUS CHEMISCHE WERKE GMBH
    Inventors: Nicolas Egeler, Marek Torbus, Milan Knezevic, Gee Ho Bae, Robert Laitar, Douglas Trinowski, Wolfgang Seelbach
  • Publication number: 20140090306
    Abstract: This invention relates to a resin preparable by reaction of a phenol/formaldehyde novolak with tetraethyl orthosilicate in a mass ratio above 28:1, wherein the phenol of the phenol/formaldehyde novolak is substituted or unsubstituted hydroxybenzene or a mixture of two or more such phenols, and to a particulate material coated with said resin. Said particles can be used e.g. in the shell molding process for the production of shell molds and shell cores; and as proppants for use in the hydraulic fracturing process.
    Type: Application
    Filed: April 20, 2012
    Publication date: April 3, 2014
    Applicant: Huettenes-Albertus Chemische Werke GmbH
    Inventors: Nicolas Egeler, Marek Torbus, Milan Knezevic, Gee Ho Bae, Robert Laitar, Douglas Trinowski, Wolfgang Seelbach
  • Patent number: 6365646
    Abstract: An embodiment of the present invention provides a method for improving the tensile strength of foundry cores and molds. More particularly, an embodiment of the present invention provides an improved binder for foundry cores and molds that include a fluoride bearing acid in combination with an inorganic silicon compound. Alternately, the improved binder may include a fluoride bearing acid in combination with a boron compound. In a preferred embodiment, a modified part 1 binder component includes a combination of hydrofluoric acid and an inorganic silicon compound.
    Type: Grant
    Filed: December 8, 1999
    Date of Patent: April 2, 2002
    Assignee: Borden Chemical, Inc.
    Inventors: Robert A. Laitar, Brian K. Teeter, Kwok-tuen Tse, Leonid S. Zaretskiy
  • Patent number: 5962567
    Abstract: Two or more sand additive particles are made to adhere to each other, using a binder. The finished product consists of free-flowing particles that are composed of the additive particles bound together by the binder. These bound additive particles may then be applied to sand, such as foundry sands, where, otherwise, multiple additions of additive might need to be made. The pH of the single additive particles can be controlled and separation of the additives due to different specific gravities can be avoided. Various mixtures of different additives are disclosed. Methods of controlling particle size of additive particles, tendency to generate dust, degrade tensile strength or control thermal expansion of foundry cores or molds by using bound additive particles are also disclosed.
    Type: Grant
    Filed: October 3, 1996
    Date of Patent: October 5, 1999
    Assignee: Borden Chemical, Inc.
    Inventors: Michael M. Geoffrey, Robert A. Laitar
  • Patent number: 5621036
    Abstract: Two or more sand additive particles are made to adhere to each other, using a binder. The finished product consists of free-flowing particles that are composed of the additive particles bound together by the binder. These bound additive particles may then be applied to sand, such as foundry sands, where, otherwise, multiple additions of additive might need to be made. The pH of the single additive particles can be controlled and separation of the additives due to different specific gravities can be avoided. Various mixtures of different additives are disclosed. Methods of controlling particle size of additive particles, tendency to generate dust, degrade tensile strength or control thermal expansion of foundry cores or molds by using bound additive particles are also disclosed.
    Type: Grant
    Filed: February 21, 1995
    Date of Patent: April 15, 1997
    Assignee: Borden Chemical, Inc.
    Inventors: Michael M. Geoffrey, Robert A. Laitar
  • Patent number: 5264535
    Abstract: A resin is prepared by the reaction of a phenol, an aldehyde and an aliphatic hydroxy compound containing two or more hydroxy groups per molecule in the presence of a divalent metal ion catalyst. These resins react with polyisocyanates to form polyurethanes that are useful binders for foundry cores and molds.
    Type: Grant
    Filed: November 16, 1992
    Date of Patent: November 23, 1993
    Assignee: Acme Resin Corp.
    Inventors: Michael M. Geoffrey, Robert A. Laitar
  • Patent number: 5189079
    Abstract: A resin is prepared by the reaction of a phenol, an aldehyde and an aliphatic hydroxy compound containing two or more hydroxy groups per molecule in the presence of a divalent metal ion catalyst. These resins react with polyisocyanates to form polyurethanes that are useful binders for foundry cores and molds.
    Type: Grant
    Filed: June 12, 1991
    Date of Patent: February 23, 1993
    Assignee: Acme Resin Corp.
    Inventors: Michael M. Geoffrey, Robert A. Laitar
  • Patent number: 4862948
    Abstract: An adhesive paste for adhering two or more objects, a composite assembly comprising two or more elements bonded by such paste, and a process for preparing cast metal articles using such paste are provided. The adhesive paste comprises an aqueous solution of a specific alkali phenol-formaldehyde resin and a hardener for that resin, wherein the paste prepared by mixing the resin and hardener has a viscosity, as mixed, in the range of about 1,000 cps to about 15,000 cps. The composite assembly comprises at least two separate elements bonded by the adhesive paste of the invention. The process uses a mold or core assembly having at least two separate elements.
    Type: Grant
    Filed: February 24, 1988
    Date of Patent: September 5, 1989
    Assignee: Borden, Inc.
    Inventor: Robert A. Laitar
  • Patent number: 4848442
    Abstract: An alkoxy-modified phenolic resole resin providing an improved binder for foundry cores and molds. The resin has predominantly ortho-ortho benzylic ether bridges joining the phenolic nuclei in the resin and at least one alkoxymethylene group for every 20 phenolic nuclei.
    Type: Grant
    Filed: October 8, 1987
    Date of Patent: July 18, 1989
    Assignee: Acme Resin Corporation
    Inventors: Raja Iyer, Rasik C. Shah, Robert A. Laitar
  • Patent number: 4723592
    Abstract: A process for preparing an alkoxy-modified phenolic resole resin useful as the polyhydroxy component of a urethane binder composition. A phenol is reacted with a molar excess of an aldehyde in the presence of an alkaline catalyst and the resulting product is further reacted with a monohydric aliphatic alcohol under acidic conditions.
    Type: Grant
    Filed: September 19, 1986
    Date of Patent: February 9, 1988
    Assignee: Acme Resin Corporation
    Inventors: Robert A. Laitar, Eduardo Gmez
  • Patent number: 4698377
    Abstract: Esters of alkoxy acids, particularly those of 3-alkoxypropionic acids are used as part or all of the polar solvent in solvent systems for binder compositions containing phenolic resins and polyisocyanates.
    Type: Grant
    Filed: September 26, 1986
    Date of Patent: October 6, 1987
    Assignee: Acme Resin Corporation
    Inventor: Robert A. Laitar
  • Patent number: 4657950
    Abstract: Refractory shaped articles are prepared by heating refractory mixes comprised of refractory particles and an alkoxy modified phenolic resole resin having at least one alkoxy methylene group for every 20 phenolic hydroxyl groups.
    Type: Grant
    Filed: October 12, 1984
    Date of Patent: April 14, 1987
    Assignee: Acme Resin Corporation
    Inventors: Raja Iyer, Rasik C. Shah, Robert A. Laitar
  • Patent number: 4634758
    Abstract: A process for preparing an alkoxy-modified phenolic resole resin useful as the polyhydroxy component of a urethane binder composition. A phenol is reacted with a molar excess of an aldehyde in the presence of an alkaline catalyst and the resulting product is further reacted with a monohydric aliphatic alcohol under acidic conditions.
    Type: Grant
    Filed: September 30, 1985
    Date of Patent: January 6, 1987
    Assignee: Acme Resin Corporation
    Inventors: Robert A. Laitar, Eduardo Gomez
  • Patent number: 4546124
    Abstract: A foundry binder composition which provides foundry cores and molds of superior hot strength comprises a polyisocyanate, a polyhydroxy component and a catalyst. The polyhydroxy component is an alkoxy modified phenolic resole resin containing at least one alkoxy methylene group for every six phenolic nuclei in the resin.
    Type: Grant
    Filed: October 12, 1984
    Date of Patent: October 8, 1985
    Assignee: Acme Resin Corporation
    Inventors: Robert A. Laitar, Eduardo Gomez
  • Patent number: 4514316
    Abstract: A polyisocyanate component useful in polyurethane binder compositions is provided. The polyisocyanate component incorporates organic phosphorous compounds that impart longer bench life to the binders making them more useful for prepraring moldable compositions such as foundry cores and molds.
    Type: Grant
    Filed: December 8, 1983
    Date of Patent: April 30, 1985
    Assignee: Acme Resin Corporation
    Inventor: Robert A. Laitar
  • Patent number: 4436881
    Abstract: An improved polyurethane binder system is provided which incorporates organic phosphorous compounds that impart longer bench life to the binders making them more useful for preparing moldable compositions such as foundry cores and molds.
    Type: Grant
    Filed: June 29, 1983
    Date of Patent: March 13, 1984
    Assignee: Acme Resin Corporation
    Inventor: Robert A. Laitar
  • Patent number: 4246157
    Abstract: There are provided binder compositions particularly useful in the foundry art which are rapid curing and which comprise (A) a phenolic resin component including at least one resole or novolak resin, solvent comprising a mixture of (1) hydrocarbon solvent and (2) polar organic solvent containing at least sufficient organic phosphate and/or carbonate ester to increase the curing speed and solubility of the phenolic resin component, (B) an isocyanate component having a functionality of two or more and (C) sufficient catalyst to catalyze substantially completely the reaction between components (A) and (B). There is also provided a moldable composition comprising aggregate material, such as foundry sand, and such binder compositions and foundry cores or molds made therefrom and including a process for their manufacture from the moldable compositions by either "cold box" or "no-bake" procedures.
    Type: Grant
    Filed: March 7, 1979
    Date of Patent: January 20, 1981
    Assignee: Acme Resin Corporation
    Inventor: Robert A. Laitar
  • Patent number: 4197385
    Abstract: A resin for coating sand and a resin-coated sand produced therefrom wherein the resin is prepared by incorporating furan into a phenolic novolak resin. In the preferred practice, the resin is produced by reaction of furfuryl alcohol with a phenolic compound at an acid pH to give a furfuryl-phenolic intermediate in a first step, and then, in a second step, reacting the furfuryl-phenolic intermediate with a lower aliphatic aldehyde to produce the resin. The resin-coated sands of the present invention provide unexpectedly improved shakeout and collapsibility characteristics in the shell process.
    Type: Grant
    Filed: August 11, 1978
    Date of Patent: April 8, 1980
    Assignee: CPC International Inc.
    Inventor: Robert Laitar
  • Patent number: 4134442
    Abstract: A resin for coating sand and a resin-coated sand produced therefrom wherein the resin is prepared by incorporating furan into a phenolic novolak resin. In the preferred practice, the resin is produced by reaction of furfuryl alcohol with a phenolic compound at an acid pH to give a furfuryl-phenolic intermediate in a first step, and then, in a second step, reacting the furfuryl-phenolic intermediate with a lower aliphatic aldehyde to produce the resin. The resin-coated sands of the present invention provide unexpectedly improved shakeout and collapsibility characteristics in the shell process.
    Type: Grant
    Filed: July 12, 1977
    Date of Patent: January 16, 1979
    Assignee: CPC International Inc.
    Inventor: Robert Laitar
  • Patent number: 4051301
    Abstract: A resin for coating sand and a resin-coated sand produced therefrom wherein the resin is prepared by incorporating furan into a phenolic novolak resin. In the preferred practice, the resin is produced by reaction of furfuryl alcohol with a phenolic compound at an acid pH to give a furfuryl-phenolic intermediate in a first step, and then, in a second step, reacting the furfuryl-phenolic intermediate with a lower aliphatic aldehyde to produce the resin. The resin-coated sands of the present invention provide unexpectedly improved shakeout and collapsibility characteristics in the shell process.
    Type: Grant
    Filed: October 16, 1975
    Date of Patent: September 27, 1977
    Assignee: CPC International Inc.
    Inventor: Robert Laitar