Patent GB-353713-A (GB)
IPC: C09J167/00
Filed: 1930-08-01
Abstract: A cementing compound is made by first heating together the alcohol and acid ingredients of an alkyd resin, for example glycerine and phthalic anhydride and fatty acids of drying or semi-drying oils such as linseed, chinawood or cottonseed oils, or the oils themselves, until a definite curing stage is reached, then adding to the resinous material a small proportion of a de-gelled drying or semi-drying oil, for example linseed and cottonseed oil, and finally heating the whole until a clear complete blend is obtained.  In one example phthalic anhydride, glycerine and the fatty acids of linseed and chinawood oils are heated together at 190 DEG  C. until a sample of the resin hardens on a 200 DEG  C. hot plate in 1\ba1/2\be minutes, de-gelled linseed oil is added and the heating continued till a clear blend is obtained, which is diluted while hot with acetone to a specific gravity of about 1,135.  In a second example a mixture of linseed and chinawood oils is heated to 280 DEG  C., cooled rapidly to 250 DEG C. and phthalic anhydride and glycerine added.  Heating at 250 DEG C. is continued until a clear blend is produced and at a gradually decreasing temperature until a sample hardens as in the first example, when the de-gelled linseed oil is added and blended. Specificatio 273,290, [Class 2 (iii), Dyes &c.], is referred to.  The Specification as open to inspection under Sect. 91 (3) (a) comprises also the use of de-gelled castor oil.  This subject-matter does not appear in the Specification as accepted.ALSO:A cementing compound is made by first heating together the alcohol and acid ingredients of an alkyd resin, for example glycerine and phthalic anhydride and fatty acids of drying or semidrying oils such as linseed, chinawood, or cotton-seed oils or the oils themselves, until a definite curing stage is reached, then adding to the resinous material a small proportion of a de-gelled drying or semi-drying oil, for example linseed and cotton-seed oil, and finally heating the whole until a clear complete blend is obtained.  In one example phthalic anhydride, glycerine, and the fatty acids of linseed and chinawood oils are heated together at 190 DEG  C. until a sample of the resin hardens on a 200 DEG  C. hot-plate in 1 1/2 minutes, de-gelled linseed oil is added and the heating continued till a clear blend is obtained, which is diluted while hot with acetone to a specific gravity of about 1,135.  In a second example a mixture of linseed and chinawood oils is heated to 280 DEG  C., cooled rapidly to 250 DEG  C. and phthalic anhydride and glycerine added.  Heating at 250 DEG  C is continued until a clear blend is produced and at a gradually decreasing temperature until a sample hardens as in the first example, when the de-gelled linseed oil is added and blended. Specification 273,290, [Class 2 (iii), Dyes &c.], is referred to.  The Specification as open to inspection under Sect. 91 (3) (a) comprises also the use of de-gelled castor oil.  This subject-matter does not appear in the Specification as accepted.ALSO:A cementing compound is made by first heating together the alcohol and acid ingredients of an alkyd resin for example glycerine and phthalic anhydride and fatty acids of drying or semi-drying oils such as linseed, chinawood or cottonseed oils, or the oils themselves, until a definite curing stage is reached, then adding to the resinous material a small proportion of a de-gelled drying or semi-drying oil, for example linseed and cotton-seed oil, and finally heating the whole until a clear complete blend is obtained.  In one example phthalic anhydride, glycerine and the fatty acids of linseed and chinawood oils are heated together at 190 DEG  C. until a sample of the resin hardens on a 200 DEG  C. hot plate in 1 1/2 minutes, de-gelled linseed oil is added and the heating continued till a clear blend is obtained, which is diluted while hot with acetone to a specific gravity of about 1,135.  In a second example a mixture of linseed and chinawood oils is heated to 280 DEG  C., cooled rapidly to 250 DEG  C. and phthalic anhydride and glycerine added.  Heating at 250 DEG  C. is continued until a clear blend is produced and at a gradually decreasing temperature until a sample hardens as in the first example, when the de-gelled linseed oil is added and blended. Laminated material is made by uniting the fibre of raw hide and varnished cambric by means of the cementing compound, which is stated to be a good electrical insulator. Specification 273,290, [Class 22, Cements &c.], is referred to.  The Specification as open to inspection under Sect. 91 (3) (a) comprises also the use of de-gelled castor oil.  This subject-matter does not appear in the Specification as accepted.