Patent GB-416946-A (GB)
Title: Improvements in the manufacture of cellulose-ester and -ether compositions
IPC: C08L1/08
Filed: 1933-04-18
Abstract: A liquid, plastic, or other composition comprises an ester or ether of cellulose and a synthetic resin obtainable by the interaction of analiphatic aldehyde and a naphthalene monosulphonamide containing no amino or substituted amino group other than that of the sulphonamide radicle.  The naphthalene monosulphonamides may contain nuclear substitution groups such as ethyl, methyl and hydroxy, and the hydrogen of the amino group may be substituted by alkyl or other groups.  Thus, methyl-, ethyl-, dimethyl-, and diethyl naphthalene sulphonamides may be used. The aldehydes, for example formaldehyde and acetaldehyde, may be employed as such or in the form of substances yielding them, for instance para-, or metaformaldehyde, formalin, or hexamethylene tetramine.  Aqueous 30--40 per cent formaldehyde gives good results.  The sulphonamide and aldehyde may be heated, if desired p  in the presence of a catalyst such as hydrochloric or other mineral acid, until the product is non-crystalline and the desired degree of resinification has taken place.  Organic esters of cellulose or inorganic esters such as nitrates and nitroacetates may be used.  Low-, medium-, and high-boiling solvents, plasticizers, which may be naphthalene sulphonamides, fire retardants such as brominated tricresyl phosphate, and pigments or dyes may be incorporated.  Other additions may include natural gums or resins, or semi-synthetic and synthetic resins, e.g. phenol-formaldehyde or diphenylol-propane-formaldehyde resins. The compositions may be employed as lacquers and coating-compositions, for making filaments, wrapping foils, photographic or other films, sheets and adhesives, particularly for use in making laminated glass, and for moulding purposes. According to an example, a -naphthalene sulphonamide is refluxed with formaldehyde solution for 8 hours at 120 DEG  C.  After removal of the top aqueous layer, the resinous residue is fused at 150 DEG  C. Other examples are given of coating-compositions, adhesives, a lacquer, a plastic composition, and a solution used for making artificial filaments by the evaporative process, including a synthetic resin prepared as above, and cellulose acetate or, in some cases, nitrate.  The Specification as open to inspection under Sect. 91 covers the use of resins derived from any aldehyde and naphthalene sulphonamide and of any cellulose derivative.  This subject-matter does not appear in the Specification as accepted.ALSO:A liquid, plastic, or other composition comprises an ester or ether of cellulose and a synthetic resin obtainable by the interaction of an aliphatic aldehyde and a naphthalene monosulphonamide containing no amino or substituted amino group other than that of the sulphonamide radicle.  The naphthalene monosulphonamides may contain nuclear substitution groups such as ethyl, methyl, and hydroxy, and the hydrogen of the amino group may be substituted by alkyl or other groups.  Thus, methylethyl-, dimethyl-, and diethyl naphthalene monosulphonamides may be used.  The aldehydes, for example formaldehyde and acetaldehyde, may be employed as such or in the form of substances yielding them, for instance para- or metaformaldehyde, formalin, or hexamethylene tetramine.  Aqueous 30-40 per cent formaldehyde gives good results.  The sulphonamide and aldehyde may be heated, if desired in the presence of a catalyst such as hydrochloric or other mineral acid until the product is non-crystalline and the desired degree of resinification has taken place.  Organic esters of cellulose or inorganic esters such as nitrates and nitroacetates may be used. Low-, medium- and high-boiling solvents, plasticizers, which may be naphthalene sulphonamides, fire retardants such as brominated tricresyl phosphate, and pigments or dyes may be incorporated. Other additions may include natural gums or resins, or semi-synthetic and synthetic resins, e.g. phenol-formaldehyde or diphenylolpropane-formaldehyde resins.  The compositions may be employed as lacquers and coating-compositions, for making filaments, wrapping foils, photographic or other films, sheets and adhesives, particularly for use in making laminated glass, and for moulding purposes.  According to an example, a -naphthalene sulphonamide is refluxed with formaldehyde solution for 8 hours at 120 DEG  C.  After removal of the top aqueous layer, the resinous residue is fused at 150 DEG  C. Other examples are given of coating-compositions, adhesives, a lacquer, a plastic composition, and a solution used for making artificial filaments by the evaporative process, including a synthetic resin prepared as above, and cellulose acetate or, in some cases, nitrate.  The Specification as open to inspection under Sect. 91 covers the use of resins derived from any aldehyde and naphthalene sulphonamide and of any cellulose derivative.  This subject-matter does not appear in the Specification as accepted.