Patent GB-650787-A (GB)
Title: Improvements relating to coating and impregnating compositions
IPC: C09F5/06
Filed: 1947-08-07
Abstract: A flexible coating and impregnating composition for varnishing, electric insulation, and waterproofing, for example for coating diaphragms of pumps, cambric, &c. comprises an oxidized, polymerized, or thickened hydrocarbon ether of an Anacardiace  phenol (from cashew nut shell liquid) mixed with a non-drying glyceride oil such as cotton seed, kukui, corn, soya bean, coconut, sunflower seed, poppy seed, or walnut oils.  The ether is preferably an alkyl ether.  A proportion of drying oil may also be added, and also gilsonite, paraffin wax, diluents such as kerosene, and driers.  In an example, the primary amyl ether of cashew nut shell liquid is heated to about 600 DEG  F. for six hours while carbon dioxide is bubbled through, and an equal quantity of crude cotton seed oil at the same temperature added.  After an interval, gilsonite is added, the temperature allowed to fall, and finally a kerosene filler and a drier such as lead and manganese naphthenates, with wax if a varnish is desired, are added.  Alternatively, the cashew amyl ether and the cotton seed oil may be heated together.  U.S.A. Specifications 2,181,119 and 2,264,409 are referred to.  The Specification as open to inspection under Sect. 91 states that the oxidation of the cashew nut liquid may be brought about by the use of driers such as litharge, manganese resinate, and copper oleate, and that polymerization may be effected by sulphuric acid, aluminium chloride, phosphoric acid, hydrochloric acid, zinc chloride, and phosphorus oxychloride.  There are also specified as polymerizable ethers, o-vinyl-phenyl ethyl and amyl ethers, o-allyl-phenyl amyl ether, o-crotyl-phenyl amyl ether, o-vinyl-phenyl sec-amyl ether, p-alkyl-phenyl ethyl and phenyl ethers, b -allyl-naphthyl ethyl ether, indene ethyl ether and o-cyclohexene-phenyl ethyl ether.  The hydrocarbon ethers of a phenol having a hydrocarbon side chain containing an ethylenic linkage may be used as plasticizers for cellulose nitrate compositions.  In one example, a coating composition is prepared by dissolving the ethyl ether of allyl phenol in a solution of cellulose nitrate.  This subject-matter does not appear in the Specification as accepted.ALSO:A flexible coating and impregnating composition for varnishing, electric insulation, and waterproofing, for example for coating diaphragms of pumps, comprises an oxidized, polymerized, or thickened hydrocarbon ether of an Anacondiaceae phenol (from cashew nut shell liquid) mixed with a non-drying glyceride oil such as cotton seed, kukui, corn, soya bean, coconut, sunflower seed, poppy seed, or walnut oils.  The ether is preferably an alkyl ether.  The thickening is effected by heating in the absence of air.  A proportion of drying oil may also be added, and also gilsonite, paraffin wax, diluents such as kerosene, and driers.  In an example, the primary amyl ether of cashew nut shell liquid is heated to about 600 DEG  F. for six hours while carbon dioxide is bubbled through, and an equal quantity of crude cotton seed oil heated to the same temperature added.  After an interval gilsonite is added, the temperature allowed to fall, and finally a kerosene thinner and a drier such as lead and manganese naphthenates, with wax if a varnish is desired, are added.  Alternatively, the cashew amyl ether and the cotton seed oil may be heated together. The gilsonite and thinner may be dispensed with and the composition applied by a doctor blade to form a coating on cambric.  U.S.A. Specifications 2,181,119 and 2,264,409 are referred to.  The Specification as open to inspection under Sect. 91 states that oxidation of the cashew nut liquid may be brought about by the use of driers such as litharge, manganese resinate, and copper oleate, and that polymerization may be effected with sulphuric acid, aluminium chloride, phosphoric acid, hydrochloric acid, zinc chloride, and phosphorus oxychloride.  A number of unsaturated compounds other than cashew nut oil which may be polymerized are specified, and examples of compositions containing chinawood oil, linseed oil, asphalt, pitch, cellulose nitrate, rubber and natural and artificial resins are included.  This subject-matter does not appear in the Specification as accepted.