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).
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Patent number: 9890295Abstract: 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: GrantFiled: April 20, 2012Date of Patent: February 13, 2018Assignee: HUTTENES-ALBERTUS CHEMISCHE WERKE GMBHInventors: Nicolas Egeler, Marek Torbus, Milan Knezevic, Gee Ho Bae, Robert Laitar, Douglas Trinowski, Wolfgang Seelbach
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Publication number: 20140090306Abstract: 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: ApplicationFiled: April 20, 2012Publication date: April 3, 2014Applicant: Huettenes-Albertus Chemische Werke GmbHInventors: Nicolas Egeler, Marek Torbus, Milan Knezevic, Gee Ho Bae, Robert Laitar, Douglas Trinowski, Wolfgang Seelbach
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Patent number: 6365646Abstract: 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: GrantFiled: December 8, 1999Date of Patent: April 2, 2002Assignee: Borden Chemical, Inc.Inventors: Robert A. Laitar, Brian K. Teeter, Kwok-tuen Tse, Leonid S. Zaretskiy
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Patent number: 5962567Abstract: 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: GrantFiled: October 3, 1996Date of Patent: October 5, 1999Assignee: Borden Chemical, Inc.Inventors: Michael M. Geoffrey, Robert A. Laitar
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Patent number: 5621036Abstract: 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: GrantFiled: February 21, 1995Date of Patent: April 15, 1997Assignee: Borden Chemical, Inc.Inventors: Michael M. Geoffrey, Robert A. Laitar
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Patent number: 5264535Abstract: 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: GrantFiled: November 16, 1992Date of Patent: November 23, 1993Assignee: Acme Resin Corp.Inventors: Michael M. Geoffrey, Robert A. Laitar
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Patent number: 5189079Abstract: 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: GrantFiled: June 12, 1991Date of Patent: February 23, 1993Assignee: Acme Resin Corp.Inventors: Michael M. Geoffrey, Robert A. Laitar
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Patent number: 4862948Abstract: 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: GrantFiled: February 24, 1988Date of Patent: September 5, 1989Assignee: Borden, Inc.Inventor: Robert A. Laitar
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Patent number: 4848442Abstract: 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: GrantFiled: October 8, 1987Date of Patent: July 18, 1989Assignee: Acme Resin CorporationInventors: Raja Iyer, Rasik C. Shah, Robert A. Laitar
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Patent number: 4723592Abstract: 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: GrantFiled: September 19, 1986Date of Patent: February 9, 1988Assignee: Acme Resin CorporationInventors: Robert A. Laitar, Eduardo Gmez
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Patent number: 4698377Abstract: 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: GrantFiled: September 26, 1986Date of Patent: October 6, 1987Assignee: Acme Resin CorporationInventor: Robert A. Laitar
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Patent number: 4657950Abstract: 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: GrantFiled: October 12, 1984Date of Patent: April 14, 1987Assignee: Acme Resin CorporationInventors: Raja Iyer, Rasik C. Shah, Robert A. Laitar
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Patent number: 4634758Abstract: 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: GrantFiled: September 30, 1985Date of Patent: January 6, 1987Assignee: Acme Resin CorporationInventors: Robert A. Laitar, Eduardo Gomez
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Patent number: 4546124Abstract: 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: GrantFiled: October 12, 1984Date of Patent: October 8, 1985Assignee: Acme Resin CorporationInventors: Robert A. Laitar, Eduardo Gomez
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Patent number: 4514316Abstract: 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: GrantFiled: December 8, 1983Date of Patent: April 30, 1985Assignee: Acme Resin CorporationInventor: Robert A. Laitar
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Patent number: 4436881Abstract: 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: GrantFiled: June 29, 1983Date of Patent: March 13, 1984Assignee: Acme Resin CorporationInventor: Robert A. Laitar
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Patent number: 4246157Abstract: 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: GrantFiled: March 7, 1979Date of Patent: January 20, 1981Assignee: Acme Resin CorporationInventor: Robert A. Laitar
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Patent number: 4197385Abstract: 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: GrantFiled: August 11, 1978Date of Patent: April 8, 1980Assignee: CPC International Inc.Inventor: Robert Laitar
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Patent number: 4134442Abstract: 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: GrantFiled: July 12, 1977Date of Patent: January 16, 1979Assignee: CPC International Inc.Inventor: Robert Laitar
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Patent number: 4051301Abstract: 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: GrantFiled: October 16, 1975Date of Patent: September 27, 1977Assignee: CPC International Inc.Inventor: Robert Laitar