Patent GB-909494-A (GB)
Title: Emulsions containing synthetic resins
Inventor: AELONY DAVID
IPC: C08L77/00
Filed: 1959-06-15
Abstract: Surfaces are coated by spraying or by blade application with a mixed aqueous emulsion of solutions of an epoxy resin containing terminal epoxy groups and a polymeric polyamide in organic p  solvents, the polyamide having a low acid number and an amine number within the range 50-300 and being the reaction product of an aliphatic polyamine and polymeric fat acids containing at least two carboxyl groups, the two solutions being miscible with each other and the resultant mixture being immiscible with water.  In a modification a liquid epoxy resin itself is used instead of a solution.  A water soluble acid, e.g. acetic, formic, tartaric, citric or boric, is preferably present to stabilize the emulsion. The surface coated may be paper, cellulose acetate, cellulose nitrate, polyvinylidene chloride, poly-ethylene, vinyl film, regenerated cellulose, poly-ethylene terephthalate, wood, copper, aluminium, magnesium, steel (including phosphatised steel) and iron, tin plate, glass plate, ceramics, cured phenolics and cured polyesters, cork, cellulosic materials, resinous materials, paper pulp, wood flour, asbestos fibres, textile fibres, clay, sand, plaster of Paris, pigments and leather.  Specified optional additives utilized in the examples are titanium dioxide, red lead, magnesium silicate, medium chrome yellow, oil yellow, lithol red and calcium stearate.ALSO:A mixed aqueous emulsion of (1) a solution of an epoxy resin containing terminal epoxy groups and (2) a solution of a polymeric polyamide is produced by mixing the two solutions with an aqueous medium in any desired order and agitating the mixture, the polyamide having a low acid number and an amine number within the range 50-300 and being the reaction product of an aliphatic polyamine and polymeric fat acids containing at least two carboxyl groups, the two solutions being miscible with each other and the resultant mixture being immiscible with water.  In a modification a liquid epoxy resin itself is used instead of a solution. Preferably the polyamides are derived from polyalkylene polyamines such as diethylene triamine, triethylene tetramine, tetraethylene pentamine and 3,3-imino-bis-propylamine.  The epoxy resins utilized are the complex polymeric reaction products of polyfunctional halohydrins, such as epichlorohydrin and glycerol dichlorohydrin, and polyhydric phenols such as resorcinol and the various bis-phenols, e.g. bisphenol A.  Specified solvents for either or both of the polymeric components are ethyl alcohol, isopropyl alcohol, butyl alcohol, 2-butoxy ethanol, monoethyl ether of diethylene glycol, tetrahydrofurfuryl alcohol, ethylene glycol, monomethyl ether, xylene, toluene, dioxan, ethyl acetate, isopropyl acetate, butyl acetate, amyl acetate, acetone, methyl ethyl ketone, methyl isobutyl ketone, hexane, heptane, octane, methyl cyclohexane and diisobutyl ketone.  A water-soluble acid, e.g. acetic, formic, tartaric, citric or boric, is preferably present to stabilize the emulsion.  The exemplified emulsions contain such additives as titanium dioxide, red lead, magnesium silicate, medium chrome yellow, oil yellow, lithol red and calcium stearate, and may be used for several applications, chiefly coating and adhesive applications.  Specification 726,570 is referred to.