Patent GB-354166-A (GB)
Title: Improvements in or relating to compositions of matter having arc resistant properties
IPC: C08G8/32
Filed: 1930-01-29
Abstract: A resinous product is prepared by condensing together a fatty oil and a phenol by heating in the presence of a promoter (for example, phosphoric acid) and continuing the heating for the purpose of eliminating free phenol and so as to produce a resinoid having arc-resisting properties; alternatively, prior to the final heating, a methylene-containing agent may be added in proportion equivalent to not more than 25 parts of hexamethylenetetramine to 200 parts of phenol originally employed for improving the moulding qualities of the resulting resinoid, the product in either case being incorporated with a filler. Specifications 267,736 and 293,453, [both in Class 95, Paints &c.], are referred to.  According to Examples, the parts being by weight (1) 300 parts of tung oil, 200 parts of phenol, and 2 parts of phosphoric acid are digested at 195-200 DEG  C. for 3 to 5 hours until very viscous.  The mass is cooled and 25 parts of hexatetramethyleneamine are added and reacted until a viscous condition is reached, the product being dissolved in benzol or other solvent; cotton flock is impregnated with the varnish in the proportion of 3 parts of cotton flock to 2 parts of the resinoid, the mixture being then dried up at a moderate temperature.  The composition is then passed between heated rolls and the product may be baked.  (2) A solution prepared according to the previous Example is applied as an impregnating medium to asbestos board or sheets of paper so that the resinoid constituent remaining is about 30 to 40 per cent, the product being thereupon baked at 100 DEG  C. or subjected to both heat and pressure.  Cresol may be substituted for the phenol and linseed or other fatty oils for the tung oil. Retardants such as rosin and other resinous products may be included in the reaction mix or in the varnish solution.  A desirable ingredient is cellulose acetate.  Plasticizing agents or light-boiling solvents can also be included with the raw materials or added at a later stage, and lubricants such as stearic acid added as a component of the moulding mixtures.  The use of a sulphonic acid derivative is also referred to as a promoter. Where desired, the moulded or other articles may be coated with the phenol-tung oil and baked to insure the arc-resistant property.ALSO:Phenol - aldehyde condensation products. - A resinous product is prepared by condensing together a fatty oil and a phenol by heating in the presence of a promoter (for example, phosphoric acid) and continuing the heating for the purpose of eliminating free phenol and so as to produce a resinoid having arc-resisting properties; alternatively, prior to the final heating, a methylene-containing agent may be added in proportion equivalent to not more than 25 parts of hexamethylenetetramine to 200 parts of phenol originally employed for improving the moulding qualities of the resulting resinoid, the product in either case being incorporated with a filler. Specifications 267,736 and 293,453, [both in Class 2 (iii), Dyes &c.], are referred to. According to examples, the parts being by weight (1) 300 parts of tung oil, 200 parts of phenol, and 2 parts of phosphoric acid are digested at 195-200 DEG  C. for 3 to 5 hours until very viscous.  The mass is cooled and 25 parts of hexamethylenetetramine are added and reacted until a viscous condition is reached, the product being dissolved in benzol or other solvent; cotton flock is then impregnated with the solution in the proportion of 3 parts of cotton flock to 2 parts of the resinoid, the mixture being then dried up at a moderate temperature.  The composition is then passed between heated rolls and the product may be baked.  (2) A solution prepared according to the previous example is applied as an impregnating medium to asbestos board or sheets of paper so that the resinoid constituent remaining is about 30 to 40 per cent, the product being thereupon baked at 100 DEG  C. or subjected to both heat and pressure.  Cresol may be substituted for the phenol and linseed or other fatty oils for the tung oil. Retardants such as resin and other resinous products may be included in the reaction mix or in the varnish solution.  A desirable ingredient is cellulose acetate.  Plasticizing agents or light-boiling solvents can also be included with the raw materials or added at a later stage, and lubricants such as stearic acid added as a component of the moulding mixtures.  The use of a sulphonic acid derivative is also referred to as a promoter.  Where desired, the moulded or other articles may be coated with the phenol-tung oil and baked to insure the arc-resistant property.  Articles moulded from resinoids made with gelatinizable forms of cellulose are produced in the form of a translucent or transparent sheet by continued rolling or grinding at low temperatures.  The filler may be cotton flock treated with sodium hydroxide solution, washed, and neutralized.ALSO:A resinous product is prepared by condensing together a fatty oil and a phenol by heating in the presence of a promoter (for example, phosphoric acid) and continuing the heating for the purpose of eliminating free phenol and so as to produce a resinoid having arc-resisting properties; alternatively, prior to the final heating, a methylene-containing agent may be added in proportion equivalent to not more than 25 parts of hexamethylenetetramine to 200 parts of phenol originally employed for improving the moulding qualities of the resulting resinoid, the product in either case being incorporated with a filler. Specifications 267,736 and 293,453, [both in Class 2 (iii), Dyes &c.], are referred to.  According to examples, the parts being by weight (1) 300 parts of tung oil, 200 parts of phenol, and 2 parts of phosphoric acid are digested at 195-200 DEG  C. for 3 to 5 hours until very viscous.  The mass is cooled and 25 parts of hexatetramethyleneamine are added and reacted until a viscous condition is reached, the product being dissolved in benzol or other solvent; cotton flock is then impregnated with the solution in the proportion of 3 parts of cotton flock to 2 parts of the resinoid, the mixture being then dried up at a moderate temperature.  The composition is then passed between heated rolls and the product may be baked.  (2) A solution prepared according to the previous example is applied as an impregnating medium to asbestos board or sheets of paper so that the resinoid constituent remaining is about 30 to 40 per cent, the product being thereupon baked at 100 DEG  C. or subjected to both heat and pressure.  Cresol may be substituted for the phenol and linseed or other fatty oils for the tung oil. Retardants such as rosin and other resinous products may be included in the reaction mix or in the varnish solution.  A desirable ingredient is cellulose acetate.  Plasticizing agents or light-boiling solvents can also be included with the raw materials or added at a later stage, and lubricants such as stearic acid added as a component of the moulding mixtures.  The use of a sulphonic acid derivative is also referred to as a promoter.  Where desired, the moulded or other articles may be coated with the phenol-tung oil and baked to insure the arc-resistant property.  Articles moulded from resinoids made with gelatinizable forms of cellulose, such as cotton flock, are produced in the form of a translucent or transparent sheet by continued rolling or grinding at low temperatures.  The filler may be cotton flock treated with sodium hydroxide solution, washed, and then neutralized.