Patent GB-343970-A (GB)
Title: An improved adhesive material
IPC: C09J191/00
Filed: 1929-10-24
Abstract: A coating composition comprises a mixture of drying oil, such as linseed or tung oil or mixtures of such oils, with not more than 25 per cent of its weight of asphalt or bitumen, the oil being oxidized by heating the mixture with earths, such as ultramarine, Prussian blue, umber, or green earth, or other known oxidizing substances such as salts of lead, manganese or iron, or by bubbling with pure or ozonized air or with oxygen in known manner.  The oil may first be heated alone to about 135-150 DEG  C., and, after addition of the oxidizing agents, heated in two stages to successively higher temperatures, the asphalt being added after the first stage.  The composition becomes waterproof on hardening and is used for waterproofing textiles, paper or wood. It may be mixed with colouring matter or pigment.  The composition may be diluted with volatile solvents, such as benzine, white spirit or benzol.  Hardening is effected by ovening at about 80 DEG  C., or by the action of ultra violet rays, ozonized air, or both.  One or more further thin coatings of the composition may be applied, the previous layer first being hardened.  According to an example, 1000 parts of crude or slightly boiled drying oil, which may first be bleached or heated to about 300 DEG  C. for a short time, are heated to about 135-150 DEG C., 50 parts of ultramarine or Prussian blue, 15 parts of umber, and 10 parts of green earth are added in powder form, the temperature is raised to about 245 DEG  C. with stirring, 40 parts of asphalt or bitumen are added, and the mass heated to 260-270 DEG  C. and kept at this temperature until the desired viscosity is attained.  The Specification as open to inspection under Sect. 91 (3) (a) comprises the addition of asphalt to the drying oil in any suitable proportions, and refers to the use of coco nut oil as a drying oil and to the use of the composition for coating indiarubber and sheet iron.  This subject-matter does not appear in the Specification as accepted.ALSO:A waterproof adhesive and coating composition comprises a mixture of drying oil, such as linseed or tung oil or mixtures of such oils, with not more than 25 per cent of its weight of asphalt or bitumen, the oil being oxidized by heating the mixture with earths, such as ultramarine, Prussian blue, umber, or green earth, or other known oxidizing substances such as salts of lead, manganese or iron, or by bubbling with pure or ozonized air or with oxygen, in known manner.  The oil may first be heated alone to about 135-150 DEG  C. and, after addition of the oxidizing agents, heated in two stages to successively higher temperatures, the asphalt being added after the first stage.  The composition becomes waterproof on hardening and is used for waterproofing textiles, paper or wood, or for attaching grains or powders to grease-free surfaces.  It may be mixed with colouring matter or pigment.  The main use is in the manufacture of waterproof abrasive products.  To a waterproofed backing of paper, wood, or textile is applied a layer of the adhesive and then the abrasive grains, or the two may be applied in admixture.  The composition may be diluted with volatile solvents, such as benzine, white spirit or benzol.  Hardening is effected by ovening at about 80 DEG  C., or by the action of ultra-violet rays, ozonized air, or both. One or more further thin coatings of the composition may be applied, the previous layer first being hardened.  According to an example, 1000 parts of crude or slightly boiled drying oil, which may first be bleached or heated to about 300 DEG  C. for a short time, are heated to about 135-150 DEG  C., 50 parts of ultramarine or Prussian blue, 15 parts of umber, and 10 parts of green earth are added in powder form, the temperature is raised to about 245 DEG  C. with stirring, 40 parts of asphalt of bitumen are added, and the mass heated to 260-270 DEG  C. and kept at this temperature until the desired viscosity is attained.  The Specification as open to inspection under Sect. 91 (3) (a) comprises the addition of asphalt to the drying oil in any suitable proportions, and refers to the use of coconut oil as a drying oil and to the use of the composition for coating indiarubber and sheet iron.  This subject-matter does not appear in the Specification as accepted.