Back to results
US 4,305,853 AGranted
Chemical modification of metal oxides and lecithin materials
AssigneeAmerican Lecithin Company
InventorsMax Kronstein, Joseph Eichberg
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeAmerican Lecithin Company
InventorsMax Kronstein, Joseph Eichberg
Estimating the term…
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. Or, the modified metal oxides can be placed into a water dispersion, whereafter the dissolved matter can in solution further interreact with reactive components dissolved in the same water, or can interreact with an additional reactive organic component (such as an unsaturated polymeric matter, in particular a latex), whereby such metal oxide matter with the lecithin-groupings enters into the water dispersion. The lecithin modified metal oxides can be used as paint pigments which are readily redispersible within the paint after storage (with or without addition of additional lecithin matter).
Process of chemically modifying a metal oxide, which comprises treating said metal oxide under heating at a temperature between 100.degree. and 160.degree. C. for a time period of at least 10 minutes with a lecithin material, in fluid form, whereby said metal oxide in the form of a grouping enters the lecithin fluid or the lecithin-fluid fraction, and whereby thereafter a modified metal oxide, partially in a suspended form, is developed partially dissolved in the fluid lecithin.
Metal oxide particles, which have been chemically modified by heating said metal oxide particles with a lecithin, selected from the group consisting of a plant lecithin, an animal lecithin and an acetone-soluble fraction of either, said heating having been done at a temperature effective to achieve said chemical modification, at least an extensive portion of said metal oxide particles being chemically modified by said lecithin, and which has increased redispersibility and solubility, that is useful in a solvent-based or water-based coating material.
Metal oxide particles, which have been chemically modified by heating said metal oxide particles with a lecithin, selected from the group consisting of a plant lecithin, an animal lecithin and an acetone-soluble fraction of either, said heating having been done at a temperature effective to achieve said chemical modification, at least an extensive portion of said metal oxide particles being chemically modified by said lecithin, and which has either increased redispersibility or solubility, that is useful in a solvent-based or a water-based coating material.
Metal oxide particles, which have been reacted with lecithin matter, thereby being chemically modified, in the form of a component in the oily fraction of lecithin, said reaction having been done at a temperature effective to achieve said chemical modification, at least an extensive portion of said metal oxide particles being chemically modified by said lecithin.
Lecithin or a lecithin fraction, which has been chemically modified by the reaction with and the entry of metal oxide particles in the form of an interreaction product between said lecithin or said lecithin fraction and said metal oxide particles, said reaction having been done at a temperature effective to achieve said chemical modification, at least an extensive portion of said metal oxide particles being chemically modified by said lecithin.
Dependencies are inferred from the claim text.