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Douglass N Schmidt, Jeffrey L Finnan, Rudolph E Lisa: Spray-dried vitamin powders using hydrophobic silica. BASF Wyandotte Corporation, David L Hedden, Joseph D Michaels, December 4, 1984: US04486435 (46 worldwide citation)

Encapsulated vitamin powders coated with a hydrophobic silica have improved free-flowing properties making these powders more suitable for direct tableting preparation.


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Douglass N Schmidt, Jeffrey L Finnan, Rudolph E Lisa: Process for preparing a sugar and starch free spray-dried vitamin C powder containing 90 percent ascorbic acid. BASF Wyandotte Corporation, David L Hedden, Joseph D Michaels, August 6, 1985: US04533674 (39 worldwide citation)

The subject invention relates to a vitamin C powder prepared by (a) spray drying an aqueous slurry of ascorbic acid and binder in the presence of an absorbent in amounts such that the resulting powder will contain at least 90 percent by weight of ascorbic acid, no more than 9 percent by weight of bi ...


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Douglass N Schmidt: Free-flowing, high density, fat soluble vitamin powders with improved stability. BASF Corporation, David L Hedden, Joseph D Michaels, July 29, 1986: US04603143 (39 worldwide citation)

Vitamin-active powders which are more free-flowing and stable, than conventional fat-soluble vitamin powders are prepared utilizing special silicon-containing materials which are predominately in the form of substantially discrete agglomerates. The agglomerates are such that preferably 50 percent of ...


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Matthias Marx, Dietmar Nissen, Wolfgang Jarre: Process for the manufacture of reinforced polyurethane foams. BASF Aktiengesellschaft, David L Hedden, Norbert M Lisicki, January 6, 1981: US04243755 (37 worldwide citation)

The invention relates to a process for the manufacture of reinforced polyurethane foams based on the reaction of organic polyisocyanates and polyols in the presence of filler dispersions. These dispersions are prepared by in situ crushing of the filler in the polyisocyanate or polyol to a particle s ...


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Heinrich Horacek, Matthias Marx, Dietmar Hobein: Molded foamed polyurethane part having a lightweight skin and a process for its manufacture. BASF Aktiengesellschaft, David L Hedden, Joseph D Michaels, June 21, 1983: US04389454 (34 worldwide citation)

The invention relates to the preparation of molded polyurethane parts having a lightfast polyurethane skin. The skin is formed by applying a reaction mixture comprising an organic polyisocyanate, a polyol, a chain extender, an aliphatic primary or secondary aliphatic diamine, and a catalyst, by a on ...


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Ruth A Bambauer, Heimo J Langer, Steven C Akey: Inorganic foundry binder systems and their uses. Ashland Oil, David L Hedden, January 17, 1995: US05382289 (26 worldwide citation)

This invention relates to inorganic no-bake foundry binder systems and their uses. The binder systems comprise as separate components: (A) mono-aluminum phosphate in an aqueous solution containing specified phosphoric acids, and (B) magnesium oxide; and certain specified zinc compounds in either the ...


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Stanley T Hirozawa: High pH coolant containing carbonate ion. BASF Wyandotte Corporation, David L Hedden, Joseph D Michaels, June 5, 1984: US04452715 (25 worldwide citation)

pH in the range of 9 to 10.5 can be maintained at elevated temperatures over an extended period by the decarboxylation of bicarbonate or carbonate ion present in a coolant composition free of phosphate and borate compounds.


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