Patent GB-491519-A (GB)
Title: Improvements in or relating to drying oil compositions
IPC: C09D191/00
Filed: 1937-03-04
Abstract: A drying-oil and oil-soluble resin composition is advanced (that is in regard to its molecular complexity) in the presence of a control agent until it is more than 30 per cent insoluble in acetone but still capable of dispersion in a hydrocarbon thinner such as benzene, toluene, xylene or hydrogenated petroleum.  The control agent is an oxide, hydroxide, naphthenate, tungate, or hexahydrobenzoate of zinc, lead, magnesium or calcium, or carbon black.  The advancing may be effected by heating and/or by oxidation and, in oxidation processes, may be checked by an oxidation inhibitor such as quinol, p-hydroxyphenylmorpholine, naphthol, di-p-naphthyl, or p-phenylenediamine.  Oils that may be used include tung, linseed, oiticica, soya, fish, perilla, sunflower, poppy seed, with or without the addition of non-drying oils such as castor, rape, cotton seed or corn oils and plasticizers such as phosphates and phthalates.  Resins include rosin and rosin salts such as limed rosin.  In an example limed rosin and tung oil are heated in the presence of zinc oxide and the resulting gel dispersed in toluene.ALSO:A drying-oil and oil-soluble-resin composition is advanced (that is, in regard to its molecular complexity) in the presence of a control agent until it is more than 30 per cent insoluble in acetone but still capable of dispersion in a hydrocarbon thinner such as benzene, toluene, xylene or hydrogenated petroleum.  The control agent is an oxide, hydroxide, naphthenate, tungate or hexahydrobenzoate of zinc, lead, magnesium or calcium, or carbon black.  The advancing may be effected by heating and/or by oxidation and in oxidation processes checked when required by an oxidation inhibitor such as quinol, p-hydroxyphenylmorpholine, naphthol, di-b -naphthyl or p-phenylenediamine.  Oils that may be used include tung, linseed, oiticica, soya, fish, perilla, sunflower, poppy seed, with or without the addition of non-drying oils such as castor, rape, cotton seed or corn oils, and plasticizers such as phosphates or phthalates.  Resins include inherently oil-soluble phenol-formaldehyde resins, rosin, rosin salts such as limed rosin and rosin esters such as ester gum.  In examples: (1) a composition comprising tung oil, castor oil and a p-hydroxydiphenylformaldehyde resin is heated in the presence of zinc oxide, diluted with toluene or xylene and blended, if desired, with a pigment such as zinc chromate or a mixture of talc and silica, and a plasticizer such as castor oil, dibutyl phthalate or a phenol tung-oil condensate; (4) linseed oil and phenylphenolformaldehyde condensate are heated in the presence of zinc oxide, and then blended with titanium dioxide, petroleum thinner and highly bodied linseed oil; (6) tung oil, castor oil and a p-tert-amylphenol-formaldehyde resin are heated in the presence of zinc hexahydrobenzoate; (7) limed rosin and tung oil are heated in the presence of zinc oxide; (8) tung oil and a p-hydroxydiphenyl-formaldehyde resin are heated, emulsified in water containing ammonia and casein, and heated or oxidized in the presence of zinc oxide.