Patent GB-455495-A (GB)
Title: Improvements in and relating to moistureproofing and moistureproofed artieles
Filed: 1935-03-21
Abstract: Sheets or films of moisture-permeable material, e.g regenerated cellulose, cellulose acetate, casein, vinyl compounds, or rubber derivatives such as rubber halide or hydrohalide, e.g. chloride or hydrochloride, are moisture-proofed by coating with a composition comprising a waxy substance and a derivative of rubber obtainable by decomposing the product of the reaction on a rubber solution of the halide of an amphoteric element or derivative thereof, such as chlorostannic acid, by pouring the reaction product into water, alcohol, or acetone.  The amphoteric metal halide may be stannic chloride, aluminium chloride, ferric chloride, or chromic chloride. Waxy substances specified are paraffin, ceresin, beeswax, spermaceti, and chlorinated naphthalene.  Softeners such as butyl stearate, tricresyl phosphate, triphenyl phosphate or petroleum jelly, gums or resins, e.g. ester gum or coumarone resin, dyes, &c. may be added. Petroleum jelly and ester gum improve the resistance of the coating to ultra-violet light.  The composition may be applied as a solution, e.g. in benzene, toluene, chloroform, carbon tetrachloride, or low-boiling petroleum distillates by immersion, spraying, brushing, or spreading.  The coated sheet is heated to evaporate the solvent and to dissolve the waxy substance in the rubber derivative. Compositions of the chlorostannic acid derivative of rubber with each of the specified waxy substances are described, also the coating of regenerated cellulose with compositions containing this rubber derivative, paraffin wax, and coumarone resin or ester gum with, if desired, petroleum jelly dissolved in a low-boiling petroleum distillate.  The sheet material may be precoated with rubber hydrochloride or with casein.  Specification 426,565, [Group III], is referred to.  The Specification as open to inspection under Sect. 91 describes also the use of a rubber derivative prepared by treating rubber with paratoluene sulphonic acid.  This subject-matter does not appear in the Specification as accepted.ALSO:A coating composition for paper, films, &c., comprises a waxy substance and a derivative of rubber obtainable by decomposing the product of the reaction of a rubber solution of the halide of an amphoteric element or derivative thereof, such as chlorostannic acid, by pouring the reaction product into water, alcohol, or acetone.  The amphoteric metal halide may be stannic chloride, aluminium chloride, ferric chloride, or chromic chloride.  Waxy substances specified are paraffin, ceresin, beeswax, spermaceti, and chlorinated naphthalene.  Softeners such as butyl stearate, tricresyl phosphate, triphenyl phosphate or petroleum jelly, gums or resins, e.g. ester gum or coumarone resin, dyes, &c., may be added.  Petroleum jelly and ester gum improve the resistance of the coating to ultra-violet light.  The composition may be applied as a solution, e.g. in benzene, toluene, chloroform, carbon tetrachloride, or low-boiling petroleum distillates by immersion, spraying, brushing, or spreading.  The coated sheet is heated to evaporate the solvent and to dissolve the waxy substance in the rubber derivative.  Compositions of the chlorostannic acid derivative of rubber with each of the specified waxy substances are described, also compositions containing this rubber derivative, paraffin wax, and coumarone resin or ester gum with, if desired, petroleum jelly dissolved in a low-boiling petroleum distillate.  Specification 426,565 is referred to.  The Specification as open to inspection under Sect. 91 describes also the use of a rubber derivative prepared by treating rubber with paratoluenesulphonic acid, and the coating of moulded objects, and wood.  This subject-matter does not appear in the Specification as accepted.ALSO:A coating-composition for paper, films, &c., comprises a waxy substance and a derivative of rubber obtainable by decomposing the product of the reaction on a rubber solution of the halide of an amphoteric element or derivative thereof, such as chlorostannic acid, by pouring the reaction product into water, alcohol, or acetone.  The amphoteric metal halide may be stannic chloride, aluminium chloride, ferric chloride, or chromic chloride.  Waxy substances specified are paraffin, ceresin, beeswax, spermaceti, and chlorinated naphthalene.  Softeners such as butyl stearate, tricresyl phosphate, triphenyl phosphate or petroleum jelly, gums or resins, e.g. ester gum or coumarone resin, dyes, &c., may be added.  Petroleum jelly and ester gum improve the resistance of the coating to ultraviolet light.  The composition may be applied as a solution, e.g. in benzene, toluene, chloroform, carbon tetrachloride, or low-boiling petroleum distillates by immersion, spraying, brushing, or spreading.  The coated sheet is heated to evaporate the solvent and to dissolve the waxy substance in the rubber derivative.  Compositions of the chlorostannic acid derivative of rubber with each of the specified waxy substances are described, also compositions containing this rubber derivative, paraffin wax, and coumarone resin or ester gum with, if desired, petroleum jelly dissolved in a low-boiling petroleum distillate.  Specification 426,565 is referred to.  The Specification as open to inspection under Sect. 91 describes also the use of a rubber derivative prepared by treating rubber with paratoluene sulphonic acid.  This subject-matter does not appear in the Specification as accepted.