Max W Kronstein

43058531, Dec 15, 1981

Mar 11, 1980

6/129474

Max Kronstein - Bronx NY
Joseph Eichberg - Atlanta GA

American Lecithin Company - Atlanta GA

C08K 904

260 22A

A process of chemically modifying metal oxides, that is oxides of metals such as iron, lead, molybdenum, titanium, zinc and other metals, by treating them under heating at a temperature between 100. degree. and 160. degree. C. for a time period between 10 minutes and one hour or more with a lecithin material, in fluid form (including molten form). The lecithin material is a vegetable lecithin, an animal lecithin or the acetone-soluble fraction of either type of lecithin. Such metal oxide groupings enter the lecithin-fluid fraction. Whereafter a modified metal oxide, partially in a suspended form, is developed partially dissolved in the fluid lecithin (where such product can be utilized as a modified form of the fluid lecithin fraction). Such solid modified metal oxide thereafter can be sedimented from the modified oily fraction. Such modified metal oxides, instead of their initial form, can be used in such form.

43167527, Feb 23, 1982

Oct 16, 1980

6/197577

Max Kronstein - Bronx NY

International Lead Zinc Research Organization, Inc. - New York NY

C23C 720
C23C 722

148 616

The surface of a metal, namely, carbon steel (automotive steel), galvanized steel and/or aluminum, can be modified by treating the metal surface with a dilute aqueous oxalic acid solution. The resultant oxalic acid treated metal surface can be further treated with a phosphatizing bath. Such dual treatment improves the corrosion resistance of the metal surface and is particularly useful in the treatment of lighter weight automobile bodies having joints of carbon steel, galvanized steel and/or aluminum.

40564940, Nov 1, 1977

Mar 7, 1975

5/556309

Max Kronstein - Bronx NY
Joseph Eichberg - Atlanta GA

American Lecithin Company - Atlanta GA

C09D 354
C09D 364
C09D 502

260 22A

Coating compositions, such as, paints with mixed pigmentation containing pigment with widely different specific gravities, have the tendency to show in the pigment sedimentation a separation of the pigment components. Such separated components do not redisperse readily with the coating composition vehicle, upon shaking or mixing, to fully restore the initial color shades. The three factors of flotation, flocculation, and sedimentation cause the separation of the coating composition components. Plant phosphatides, which are referred to as lecithins, (and modified plant phosphatides) can be used as the only additive resulting in a joint sedimentation of the entire pigment mixture without separation of the pigment components from each other. As a result, on shaking or mixing, the entire pigmentation reenters the coating composition jointly, and the initial color shade of the coating composition is restored. The lecithin or modified lecithin is used in an amount between 3.

41950020, Mar 25, 1980

Jul 27, 1978

5/928725

Schrade F. Radtke - New Canaan CT
Dodd S. Carr - Newark NJ
Max Kronstein - Bronx NY

International Lead Zinc Research Organization, Inc. - New York NY

C08J 306
C08L 904
C08L 908
C08L 6706

260 292E

A dispersion composition and a method for coating the surface of steel casting dies for molten metals are described. The dispersion composition comprises boron nitride powder dispersed in a peroxide-modified aqueous dispersion of a water-dispersible film-forming polymer. The coating composition provides thermal insulation to the mold surface, thereby minimizing premature solidification of the cast metal.

45201536, May 28, 1985

Nov 23, 1982

6/443899

Max Kronstein - Riverdale NY
Joseph Eichberg - Atlanta GA

American Lecithin Company - Atlanta GA

C08K 552
C08K 556
C23F 1110

524145

A process which includes subjecting a composition of (a) solid or fluid, oil-carrying or oil-free lecithin materials and (b) metal oxides to mechanical treatment or mechanical impact, without the requirement of heat application to such composition. The reaction products of component (a) and component (b) have unique properties.

41265912, Nov 21, 1978

Apr 7, 1977

5/785644

Max Kronstein - Bronx NY
Joseph Eichberg - Atlanta GA

American Lecithin Company - Atlanta GA

C09D 354
C09D 364
C09D 502

260 22A

Coating compositions, such as, paints with mixed pigmentation containing pigment with widely different specific gravities, have the tendency to show in the pigment sedimentation a separation of the pigment components. Such separated components do not redisperse readily with the coating composition vehicle, upon shaking or mixing, to fully restore the initial color shades. The three factors of flotation, flocculation, and sedimentation cause the separation of the coating composition components. Plant phosphatides, which are referred to as lecithins, (and modified plant phosphatides) can be used as the only additive resulting in a joint sedimentation of the entire pigment mixture without separation of the pigment components from each other. As a result, on shaking or mixing, the entire pigmentation reenters the coating composition jointly, and the initial color shade of the coating composition is restored. The lecithin or modified lecithin is used in an amount between 4 to 10 percent based on the amount of pigment.

42640520, Apr 28, 1981

Jul 16, 1979

6/058096

Schrade F. Radtke - New Canaan CT
Dodd S. Carr - Newark NJ
Max Kronstein - Bronx NY

International Lead Zinc Research Organization, Inc. - New York NY

B22C 300
B28D 736

249115

A dispersion composition and a method for coating the surface of steel casting dies for molten metals are described. The dispersion composition comprises boron nitride powder dispersed in a peroxide-modified aqueous dispersion of a water-dispersible film-forming polymer. The coating composition provides thermal insulation to the mold surface, thereby minimizing premature solidification of the cast metal.

42330882, Nov 11, 1980

Mar 29, 1979

6/024966

Max Kronstein - Bronx NY

International Lead Zinc Research Organization, Inc. - New York NY

C23F 710
C23F 712

148 616

A process for inhibiting corrosion and providing a foundation for subsequent application of organic coating systems to metal surfaces, such as steel surfaces and zinc-, lead-, copper- and tin-coated surfaces, comprises the development of a protective phosphatizing reaction coating based on a metal other than the metal which is to be protected either by an immersion treatment or by a spray treatment with a phosphatizing bath which contains the metal phosphate or metal acid phosphate matter for such a treatment in a status nascendi. Such a state is obtained by the use of an aqueous medium containing phosphate ions derived from an alkali metal phosphate, an alkali metal acid phosphate, phosphoric acid or combinations of those and introducing into the aqueous medium a metal oxide based on a metal other than that which is to be treated, preferably an oxide of the metal group of molybdenum, vanadium, tungsten, titanium, lead, manganese and copper, whereby the metal oxide in the aqueous medium forms with the phosphate ions of the aqueous medium the desired freshly prepared metal phosphate or metal acid phosphate to develop on the treated metal surface the required protective reaction coating. The phosphatizing bath can be modified further by introducing into the aqueous medium a ligand-forming organic polymer which is capable of entering the reaction coating formation and said polymer can further be influenced also by the addition into the aqueous medium of a small amount of an acetylenic alcohol or a dialdehyde. Also a dispersing agent, such as formamide or an alkyl-substituted formamide, can be employed to increase the reactivity of the metal oxide component.