Patent GB-358428-A (GB)
IPC: C08K5/11
Filed: 1930-06-06
Abstract: Liquid compositions comprising an organic ester of cellulose, particularly cellulose acetate, contain as plasticizer an organic tartrate in a proportion of at least 100 per cent on the weight of the cellulose derivative.  The tartaric acid esters include relatively water insoluble, non-volatile alkyl tartrates such as dibutyl tartrates and aralkyl tartrates such as mono- and dibenzyl tartrates; dimethyl and diethyl tartrates are less valuable on account of their solubility in water.  The compositions may also include other usual substances, e.g. solvents, fillers, and colouring matters; and also aromatic phosphates, e.g. tricresyl phosphate and particularly triphenyl phosphates, the amount of triaryl phosphate preferably being between 12 and 25 per cent of the cellulose ester; such compositions are particularly suitable for the manufacture of safety glass and glass substitutes.  The compositions may be produced in any suitable way, e.g. by mixing in a kneader the cellulose ester, plasticizer and a suitable solvent, e.g. acetone, ethyl lactate, ethyl methyl-ketone; a known combination of ethyl alcohol, methyl alcohol, acetone, chloroform, benzene, amyl acetate, ethyl lactate, ethyl-methyl-ketone, &c. The compositions may be employed as lacquers or dopes or for the production of films and extruded materials. Compositions made by adding to the cellulose ester and plasticizer sufficient solvent to form a mobile solution may be formed into photographic films in an ordinary film-casting apparatus.  Specified colouring agents, pigments, or filling materials comprise gypsum, talc, barytes, clay, titanium oxide, iron oxide, cork, leather, rubber, cotton waste, wood flour, gum, &c. preferably in fine powder or granules.  Two examples of compositions are given comprising cellulose acetate and dibutyl tartrate associated with (1) tricresyl phosphate, acetone, and methyl acetone, and (2) para-ethyl toluene-sulphon-amide, methyl acetate, methyl ethyl acetone, diacetone alcohol, and acetone.  Specification 308,657, [Class 95, Paints &c.], is referred to.  The Specification as open to inspection under Sect. 91 (3) (a) refers to compositions in general and also to the formation of the product into sheets which may be stacked and formed into blocks by heat and pressure and subsequently cut into sheets which are polished by pressing between heated metal plates. Sheets may also be formed on rolls.  This subject-matter does not appear in the Specification as accepted.ALSO:Carboxylates.-Liquid compositions comprising an organic ester of cellulose, particularly cellulose acetate, contain as plasticizer an organic tartrate in a proportion of at least 100 per cent on the weight of the cellulose derivative.  The tartaric acid esters include relatively water insoluble, non-volatile alkyl tartrates such as dibutyl tartrate and aralkyl tartrates such as mono- and dibenzyl tartrates; dimethyl and diethyl tartrates are less valuable on account of their solubility in water.  The compositions may also include other usual substances e.g. solvents, fillers, and colouring matters; and also aromatic phosphates, e.g. tricresyl phosphate and particularly triphenyl phosphates, the amount of triaryl phosphate preferably being between 12 and 25 per cent of the cellulose ester; such compositions are particularly suitable for the manufacture of safety glass and glass substitutes.  The compositions may be produced in any suitable way, e.g. by mixing in a kneader the cellulose ester, plasticizer and a suitable solvent e.g. acetone, ethyl lactate, ethyl methyl-ketone; a known combination of ethyl alcohol, methyl alcohol, acetone, chloroform, benzene, amyl acetate, ethyl lactate, ethyl-methyl-ketone, &c.  The compositions may be employed as lacquers or dopes or for the production of films and extruded materials.  Compositions made by adding to the cellulose ester and plasticizer sufficient solvent to form a mobile solution may be formed into photographic films in an ordinary film-casting apparatus. Specified colouring agents, pigments or filling materials comprise gypsum, talc, barytes, clay, titanium oxide, iron oxide, cork, leather, rubber, cotton waste, wood flour, gum, &c. preferably in fine powder or granules. Two examples of compositions are given comprising cellulose acetate and dibutyl tartrate associated with (1) tricresyl phosphate, acetone, and methyl acetone, and (2) para-ethyl toluene-sulphon-amide, methyl acetate, methyl ethyl acetone, diacetone alcohol, and acetone.  Specification 308,657, [Class 2 (ii), Cellulose &c.], is referred to.  The Specification as open to inspection under Sect. 91 (3) (a) refers to compositions in general and also to the formation of the product into sheets which may be stacked and formed into blocks by heat and pressure and subsequently cut into sheets which are polished by pressing between heated metal plates.  Sheets may also be formed on rolls.  This subject-matter does not appear in the Specification as accepted.ALSO:Liquid compositions comprising an organic ester of cellulose, particularly cellulose acetate, contain as plasticizer an organic tartrate in a proportion of at least 100 per cent on the weight of the cellulose derivative.  The tartaric acid esters include relatively water insoluble, non-volatile alkyl tartrates such as dibutyl tartrate and aralkyl tartrates such as mono- and dibenzyl tartrates; dimethyl and diethyl tartrates are less valuable on account of their solubility in water.  The compositions may also include other usual substances, e.g. solvents, fillers, and colouring matters; and also aromatic phosphates, e.g. tricresyl phosphate and particularly triphenyl phosphates, the amount of triaryl phosphate preferably being between 12-25 per cent of the cellulose ester; such compositions are particularly suitable for the manufacture of safety glass and glass substitutes.  The compositions may be produced in any suitable way, e.g. by mixing in a kneader the cellulose ester, plasticizer, and a suitable solvent, e.g. acetone, ethyl lactate, ethyl methyl-ketone; a known combination of ethyl alcohol, methyl alcohol, acetone, chloroform, benzene, amyl acetate, ethyl lactate, ethyl-methyl-ketone, &c. The compositions may be employed as lacquers or dopes or for the production of films and extruded materials. Compositions made by adding to the cellulose ester and plasticizer sufficient solvent to form a mobile solution may be formed into photographic films in an ordinary film-casting apparatus.  Specified colouring agents, pigments or filling materials comprise gypsum, talc, barytes, clay, titanium oxide, iron oxide, cork, leather, rubber, cotton waste, wood flour, gum, &c., preferably in fine powder or granules.  Two examples of compositions are given comprising cellulose acetate and dibutyl tartrate associated with (1) tricresyl phosphate, acetone, and methyl acetone, and (2) para-ethyl toluene-sulphon-amide, methyl acetate, methyl ethyl acetone, diacetone alcohol, and acetone.  Specification 308,657, [Class 70, Indiarubber &c.], is referred to.  The Specification as open to inspection under Sect. 91 (3) (a) refers to compositions in general and also to the formation of the product into sheets which may be stacked and formed into blocks by heat and pressure and subsequently cut into sheets which are polished by pressing between heated metal plates.  Sheets may also be formed on rolls.  This subject-matter does not appear in the Specification as accepted.