Patent GB-417218-A (GB)
Title: Improvements in the manufacture of artificial materials
IPC: C08K5/103
Filed: 1933-07-20
Abstract: An ester of a saccharide is incorporated in solutions, dopes, varnishes and other liquid or other compositions containing organic derivatives of cellulose, plasticizers therefor and solvents.  Films, foils and the like products may be produced from such solutions, which are less viscous and have a lower surface tension than similar solutions not containing the saccharide ester.  Saccharides include monosaccharides such as dextrose, fructose, mannose and other hexoses, polysaccharides such as starches, dextrine and the like and the ester radicle may be, e.g. the acetate, formate, propionate or butyrate radicle.  The amount of saccharide ester may be from 0,5 to 50 per cent of the weight of organic derivative of cellulose and is preferably 0,5 to 10 per cent.  In the production of a plastic composition, the saccharide ester together with a suitable plasticizer, in the form of a solution, may be sprayed upon the cellulose derivative base which is then worked on malaxating rollers. Medium or high boiling solvents, and diluents, particularly water, may be incorporated in the solutions.  In an example, 30 to 35 parts of diethyl phthalate and 5 parts of fructose penta-acetate in 80 parts of benzene-alcohol (50 : 50) are sprayed on or otherwise incorporated with 100 parts acetone-soluble cellulose acetate. The mass is then worked up on rollers and may be moulded into sheets, rods, blocks &c.  The Specification as open to inspection under Sect. 91 comprises also solutions, moulding or plastic compositions containing an organic derivative of cellulose and an ester of a saccharide, the use of plasticizers and solvents being optional. Threads, yarns and filaments may be produced which may be drawn down to a greater extent than is normal.  In two additional examples, (1) to a solution of cellulose acetate in an acetone-water mixture is added 2 to 5 per cent of dextrose acetate.  Filaments, which may be drawn down to approximately 20 per cent finer than is normal, are obtained by extrusion into an evaporative atmosphere; (2) the solution of (1) is extruded through a slit on to a polished nickel-surfaced wheel.  Specifications 340,324, 340,325, 340,436, and 340,437 are referred to.  This subject-matter does not appear in the Specification as accepted.ALSO:An ester of a saccharide is incorporated in solutions, dopes, varnishes and other liquid or other compositions containing organic derivatives of cellulose, plasticizers therefor and solvents.  Films, foils and the like products may be produced from such solutions, which are less viscous and have a lower surface tension than similar solutions not containing the saccharide ester.  Saccharides include monosaccharides such as dextrose, fructose, mannose and other hexoses, polysaccharides such as starches, dextrine and the like and the ester radicle may be e.g. the acetate, formate, propionate or butyrate radicle.  The amount of saccharide ester may be from 0,5 to 50 per cent of the weight of organic derivative of cellulose and is preferably 0,5 to 10 per cent.  In the production of a plastic composition, the saccharide ester together with a suitable plasticizer, in the form of a solution, may be sprayed upon the cellulose derivative base which is then worked on malazating rollers. Medium or high boiling solvents, and diluents, particularly water, may be incorporated in the solutions.  In an example 30 to 35 parts of diethyl phthalate and 5 parts of fructose pentaacetate in 80 parts of benzene-alcohol (50 : 50) are sprayed on or otherwise incorporated with 100 parts acetone-soluble cellulose acetate. The mass is then worked up on rollers and may be moulded into sheets, rods, blocks &c. The Specification as open to inspection under Sect. 91 comprises also solutions, moulding or plastic compositions containing an organic derivative of cellulose and an ester of a saccharide, the use of plasticizers and solvents being optional.  Threads, yarns and filaments may be produced which may be drawn down to a greater extent than is normal.  In two additional examples (1) to a solution of cellulose acetate in an acetone-water mixture is added 2 to 5 per cent of dextrose acetate.  Filaments, which may be drawn down to approximately 20 per cent finer than is normal, are obtained by extrusion into an evaporative atmosphere, (2) the solution of (1) is extruded through a slit on to a polished nickel-surfaced wheel. Specifications 340,324, 340,325, 340,436, and 340,437, [all in Group IV], are referred to.  This subject-matter does not appear in the Specification as accepted.