GB397136A - Improvements in or relating to oils obtained from rubber - Google Patents

Abstract

Oils suitable for use in the preparation of paints and varnishes and as impregnating media for paper, cloth, leather, &c. are produced by the catalytic hydrogenation of natural or synthetic rubber in the presence of solvents such as petroleum hydrocarbons. To the liquid so obtained may be added hardening-agents, natural or artificial copals, amber or other resins, and drying-oils. In examples, equal parts by weight of natural or synthetic rubber and a petroleum distillate boiling between 130 DEG and 200 DEG C. with a nickel catalyst are heated in the presence of hydrogen in an autoclave for 3 to 6 hours at 200 DEG to 300 DEG C. and a pressure of 50 to 150 atmospheres. The resultant liquid, with or without added resins, may be used as a varnish or paint. Vulcanization may be effected, or treatment with chlorine or chloride of lime followed by potassium carbonate may be employed to make the product lighter in colour; alternatively the product may be treated with oxidizing agents or ozonized air. Prior to hydrogenation the rubber and solvent may be heated under pressure with aluminium, zinc, or ferric chloride. Specifications 263,862, [Class 2 (iii), Dyes &c.], and 355,945, [Group III], are referred to. The Specification as open to inspection under Sect. 91 states also that the hydrogenation may be effected in the absence of solvents and by means of gases containing hydrogen, e.g. water gas, and that treatment with peroxides may be effected. Rubber latex and regenerated rubber may also be treated, the addition of hydrocarbons not being necessary in the case of latex. This subject-matter does not appear in the Specification as accepted.ALSO:Oils suitable for use in the preparation of paints and varnishes and as impregnating media for paper, cloth, leather, &c. are produced by the catalytic hydrogenation of natural or synthetic rubber in the presence of solvents such as petroleum hydrocarbons. To the liquid so obtained may be added hardening agents, natural or artificial copals, amber or other resins, and drying-oils. In examples, equal parts by weight of natural or synthetic rubber and a petroleum distillate boiling between 130 and 200 DEG C. with a nickel catalyst are heated in the presence of hydrogen in an autoclave for 3 to 6 hours at 200 to 300 DEG C. and a pressure of 50 to 150 atmospheres. The resultant liquid, with or without added resins, may be used as a varnish or paint. Vulcanization may be effected or treatment with chlorine or chloride of lime followed by potassium carbonate may be employed to make the product lighter in colour; alternatively the product may be treated with oxidizing agents or ozonized air. Prior to hydrogenation, the rubber and solvent may be heated under pressure with aluminium, zinc or ferric chloride. Specifications 263,862, [Class 1 (i), Chemical processes &c.], and 355,945 are referred to. The Specification as open to inspection under Sect. 91 states also that the hydrogenation may be effected in the absence of solvents and by means of gases containing hydrogen, e.g. water gas, and that treatment with peroxides may be effected. Rubber latex and regenerated rubber may also be treated, the addition of hydrocarbons not being necessary in the case of latex. This subject-matter does not appear in the Specification as accepted.ALSO:Oils suitable for use in the preparation of paints and varnishes and as impregnating media for paper, cloth, leather, &c. are produced by the catalytic hydrogenation of natural or synthetic rubber in the presence of solvents such as petroleum hydrocarbons. To the liquid so obtained may be added hardening-agents, natural or artificial copals, amber or other resins and drying oils. In examples, equal parts by weight of natural or synthetic rubber and a petroleum distillate boiling between 130-200 DEG C. with a nickel catalyst are heated in the presence of hydrogen in an autoclave for 3 to 6 hours at 200-300 DEG C. and a pressure of 50 to 150 atmospheres. The resultant liquid, with or without added resins, may be used as a varnish or paint. Vulcanization may be effected or treatment with chlorine or chloride of lime followed by potassium carbonate may be employed to make the product lighter in colour; alternatively the product may be treated with oxidizing agents or ozonized air. Prior to hydrogenation the rubber and solvent may be heated under pressure with aluminium, zinc, or ferric chloride. Specifications 263,862, [Class 70, Indiarubber &c.], and 355,945 are referred to. The Specification as open to inspection under Sect. 91 states also that the hydrogenation may be effected in the absence of solvents and by means of gases containing hydrogen, e.g. water gas, and that treatment with peroxides may be effected. Rubber latex and regenerated rubber may also be treated, the addition of hydrocarbons not being necessary in the case of latex. This subject-matter does not appear in the Specification as accepted.