1
Calvin K Johnson, David R Armbruster: Particles covered with a cured infusible thermoset film and process for their production. Acme Resin Corporation, Stanley M Parmerter, March 27, 1984: US04439489 (114 worldwide citation)

An improved process is provided for preparing a product containing particles individually coated with a cured, thermoset phenolic resin. The process comprises mixing particulate matter with an uncured resin and a lubricant at a temperature which causes curing of the resin. The product obtained by th ...


2
Calvin K Johnson, Kwok tuen Tse: Bisphenol-containing resin coating articles and methods of using same. Borden Chemical, Stevens Davis Miller & Mosher L, June 29, 1999: US05916933 (84 worldwide citation)

Proppants comprising a particle coated with a composition comprising bisphenol-aldehyde novolak resin, a bisphenol homopolymer or mixtures including such polymers are disclosed. Foundry sands comprising a particle coated with a composition comprising bisphenol-aldehyde novolak resin, a bisphenol hom ...


3
Calvin K Johnson, Kwok tuen Tse: Bisphenol-containing resin coating articles and methods of using same. Borden Chemical, Watson Cole Stevens Davis P L L C, June 17, 1997: US05639806 (77 worldwide citation)

Proppants comprising a particle coated with a composition comprising bisphenol-aldehyde novolak resin, a bisphenol homopolymer or mixtures including such polymers are disclosed. Foundry sands comprising a particle coated with a composition comprising bisphenol-aldehyde novolak resin, a bisphenol hom ...


4
Calvin K Johnson, Kwok tuen Tse, Leonid S Zaretskiy, Brian E Algar: Binders for cores and molds. Borden Chemical, October 9, 2001: US06299677 (35 worldwide citation)

No-bake inorganic binder compositions for binding particulate material and methods for curing such inorganic binders. The inorganic binder compositions are composed of silicate and phosphate components. The no-bake compositions further contain curing catalyst such as a catalyst selected from the gro ...


5
Calvin K Johnson, Bruce E Wise: Method for easy removal of sand cores from castings. Acme Resin, Rockey and Rifkin, June 30, 1992: US05126089 (13 worldwide citation)

Sand cores are removed from metal or plastic coatings by exposing the cores to a humid atmosphere for a sufficient time to weaken the binder of the sand cores. The sand is then shaken from the casting. Metal or plastic castings with hollow passages are produced by forming a casting around the sand c ...


6
Wayne R Walisser, Calvin K Johnson: Water soluble and storage stable resole-melamine resin. Borden Chemical, George P Maskas, Kenneth P Van Wyck, September 14, 1999: US05952440 (12 worldwide citation)

A curable, alkaline, melamine modified phenol-formaldehyde resin is prepared from an initial phenol-formaldehyde resole resin containing from 0.5 to 2.5 percent of free formaldehyde by scavenging formaldehyde with 1 to 12 parts of melamine for each 100 parts of the initial resin wherein the molar ra ...


7
Calvin K Johnson, Jimmy Pingao Chen: Benzoxazine polymer composition. Borden Chemical, Michael M Geoffrey, Kenneth P Van Wyck, June 8, 1999: US05910521 (12 worldwide citation)

There is provided a composition that is the product of mixing and reaction a resole, an alcoholate of an amino triazine, and aldehyde. This composition is useful as a thermosetting resin. This composition is useful as a curative for novolac resins. There is also provided a process for making this co ...


8
Calvin K Johnson, David R Armbruster, Sudhir K Trikha: Dialdehyde modified phenolic foundry sand core binder resins, processes for making same, and process for preparing foundry cores and molds employing same. Borden, Roylance Abrams Berdo & Goodman, October 11, 1994: US05354788 (12 worldwide citation)

A phenolic resole resin for use as a foundry binder which has been internally modified to reduce its hot strength and thereby enhance its shakeout property is disclosed. The resin is the reaction product of a phenolic compound; a dialdehyde; and formaldehyde. A process of preparing such resin is als ...


9
David R Armbruster, Calvin K Johnson: Foundry shell core and mold composition. Acme Resin Corporation, December 15, 1987: US04713294 (10 worldwide citation)

A foundry shell core and mold composition comprises particulate matter coated with a curable phenolic-furan resin. The process for making the resin coated particulate matter substantially eliminates the sue of hexamethylene tetramine.


10
Calvin K Johnson, Robert S Craig: Shell process foundry resin compositions. Acme Resin Corporation, Stanley M Parmerter, August 5, 1980: US04216133 (9 worldwide citation)

Shell process foundry resin compositions containing novolak resins are improved by incorporating therein from about 0.5 to about 10 percent, based on the weight of the resin, of a finely divided, siliceous material such as fumed silica, bentonite, kaolin clay and attapulgus clay. The presence of the ...