Patent GB-442872-A (GB)
Title: Coating and plastic compositions
IPC: C08L15/00
Filed: 1934-08-15
Abstract: Coating, plastic, and adhesive compositions comprise peracetylated rubber obtainable by treating rubber in chloroform solution with hydrogen peroxide in the presence of glacial acetic acid at a temperature above 60 DEG  C. compounded with a synthetic resin.  In an example, peracetylated rubber is prepared by refluxing at 65 DEG C. 100 gms. of milled pale crepe rubber, 700 c.c. of chloroform, 500 c.c. of glacial acetic acid and 110 gms. of 30 per cent hydrogen peroxide for 16 to 18 hours in a vessel equipped with a mechanical stirrer.  Compositions are made by compounding with one or more of the following: an ester of a natural resin or gum such as congo, damar, Kauri, rosin, Zanzibar, manila, pontianac and ester gum; a synthetic resin, e.g. phenolformaldehyde, polyhydric alcohol-polybasic acid, urea-formaldehyde condensation products and vinyl polymers. Softeners and plasticizers, solvents, fillers and pigments may be added and also oils and proteins such as casein, glue and gelatin. The compositions may be used for coating surfaces, as moulding compositions, as dopes for fabrics, paper, &c., as a binding interlayer for sheets of cellulose acetate, cellulose nitrate, mica, glass, &c., as adhesives for laminated paper and wood products, and for general adhesive purposes.  Examples of plastic compositions include a mixture of metastyrene and peracetylated rubber.ALSO:Coating, plastic, and adhesive compositions comprise peracetylated rubber obtainable by treating rubber in chloroform solution with hydrogen peroxide in the presence of glacial acetic acid at a temperature above 60 DEG  C., compounded with a cellulose derivative or a natural or synthetic resin.  In an example, peracetylated rubber is prepared by refluxing at 65 DEG  C. 100 gms. of milled pale cr<\>zepe rubber, 700 c.c. of chloroform, 500 c.c. of glacial acetic acid and 110 gms. of 30 per cent hydrogen peroxide for 16 to 18 hours in a vessel equipped with a mechanical stirrer.  The solution is washed three times with water and the last traces of acid neutralized with sodium carbonate.  The solution is then dried with anhydrous sodium sulphate and vacuum distilled.  The peracetylated rubber is obtained as a yellow transparent resinous solid. Compositions are made by compounding with one or more of the following: a cellulose derivative, e.g. cellulose nitrate, acetate, nitro-acetate, propionate, butyrate, ethyl cellulose or propyl cellulose; a natural resin or gum or an ester thereof, e.g. congo, damar, Kauri, rosin, Zanzibar, manila, pontianic and ester gum; a synthetic resin, e.g. phenolformaldehyde, polyhydric alcohol-polybasic acid, urea-formaldehyde and vinyl.  Softeners and plasticizers, solvents, fillers and pigments may be added and also oils and proteins such as casein, glue and gelatin.  The compositions may be used for coating surfaces, as moulding compositions, as dopes for fabrics, paper, &c., as a binding interlayer for sheets of cellulose acetate, cellulose nitrate mica, glass, &c. as adhesives for laminated paper and wood products, and for general adhesive purposes.  Examples of coating compositions are (1) 12 parts of cellulose nitrate, 6 parts of peracetylated rubber and 180 parts of solvent; (2) 4 parts of damar, 1 part of peracetylated rubber and 10 parts of toluene; and examples of plastic compositions are (1) 100 parts of ethyl cellulose, 20 parts of peracetylated rubber and 200 parts of filler--including colour; (2) 80 parts of metastyrene and 20 parts of peracetylated rubber.  Other examples are given.ALSO:Coating, plastic, and adhesive compositions comprise peracetylated rubber obtainable by treating rubber in chloroform solution with hydrogen peroxide in the presence of glacial acetic acid at a temperature above 60 DEG  C. compounded with a cellulose derivative or a natural or synthetic resin.  In an example peracetylated rubber is prepared by refluxing at 65 DEG  C., 100 gms. of milled pale cr<\>zepe rubber, 700 cc. of chloroform, 500 cc. of glacial acetic acid and 110 gms. of 30 per cent hydrogen peroxide for 16 to 18 hours in a vessel equipped with a mechanical stirrer. The solution is washed three times with water and the last traces of acid neutralized with sodium carbonate.  The solution is then dried with anhydrous sodium sulphate and vacuum distilled.  The peracetylated rubber is obtained as a yellow transparent resinous solid. Compositions are made by compounding with one or more of the following:-a cellulose derivative e.g. cellulose nitrate, acetate, nitro-acetate, propionate, butyrate, ethyl cellulose or propyl cellulose; a natural resin or gum or an ester thereof e.g. congo, damar, Kauri, rosin, Zanzibar, manila, pontianic and ester gum; a synthetic resin e.g. phenol-formaldehyde, polyhydric alcohol-polybasic acid, urea-formaldehyde and vinyl.  Softeners and plasticizers, solvents, fillers and pigments may be added and also oils and proteins such as casein, glue and gelatin.  The compositions may be used for coating surfaces, as moulding compositions, as dopes for fabrics, paper &c., as a binding interlayer for sheets of cellulose acetate, cellulose nitrate, mica, glass &c., as adhesives for laminated paper and wood products, and for general adhesive purposes.  Examples of coating compositions are: (1) 12 parts of cellulose nitrate, 6 parts of peracetylated rubber and 180 parts of solvent; (2) 4 parts of damar, 1 part of peracetylated rubber and 10 parts of toluene; and examples of plastic compositions are: (1) 100 parts of ethyl cellulose, 20 parts of peracetylated rubber and 200 parts of filler including colour; (2) 80 parts of metastyrene and 20 parts of peracetylated rubber.  Other examples are given.