Patent GB-404597-A (GB)
Title: Manufacture of plastic materials
IPC: C08L1/14
Filed: 1932-04-11
Abstract: Aryl phosphates, such as triphenyl or tricresyl phosphate are used as plasticizers for mixed cellulose esters.  These include the acetate-stearate, acetate-propionate, acetate-butyrate, acetate - stearate - palmitate, propionate - stearate, butyrate - stearate, acetate-crotonate, acetate-oleate, acetate-laurate and acetate-laurate-myristate.  A material suitable for films consists of 100 parts cellulose acetate-propionate, containing 5 to 20 per cent propionyl radicle, in 400 parts acetone to which is added triphenyl phosphate, e.g. 30 parts; or for thin sheeting, 100 parts cellulose acetate-stearate, with an acetyl content of about 40 per cent, in 500 parts ethylene chloride to which is added 10 to 20 parts tricresyl phosphate.  Other solvents such as ethyl acetate and chloroform-alcohol may be used and the solution may contain also other cellulose esters or ethers, natural or artificial gums, waxes, heavy metal soaps, higher fatty acids or their esters with mono- or polybasic alcohols, resins or oils. The material may be used for spinning or in lacquers or in moulding powders.  Specifications 219,926 and 287,880, [both in Class 2 (ii), Cellulose &c.], are referred to.ALSO:Aryl phosphates, such as triphenyl or tricresyl phosphate are used as plasticizers for mixed cellulose esters.  These include the acetate-stearate, acetate-propionate, acetate-butyrate, acetate-stearate-palmitate, propionate-stearate, butyrate-stearate, acetate-crotonate, acetate-oleate, acetate-laurate, and acetate-laurate-myristate.  A material suitable for films consists of 100 parts cellulose acetate-propionate, containing 5 to 20 per cent propionyl radicle, in 400 parts acetone to which is added triphenyl phosphate e.g. 30 parts; or for thin sheeting, 100 parts cellulose acetate-stearate, with an acetyl content of about 40 per cent, in 500 parts ethylene chloride to which is added 10 to 20 parts tricresyl phosphate. Other solvents such as ethyl acetate and chloroform-alcohol may be used and the solution may contain also other cellulose esters or ethers, natural or artificial gums, waxes, heavy metal soaps, higher fatty acids or their esters with mono- or polybasic alcohols, resins or oils.  The material may be used for spinning or in lacquers or in moulding powders.  Specifications 219,926 and 287,880, [both in Class 2 (ii), Cellulose &c.], are referred to.ALSO:Aryl phosphates, such as triphenyl, or tricresyl phosphate are used as plasticizers for mixed cellulose esters.  These include the acetate-stearate, acetate-propionate, acetate-butyrate, acetate-stearate-palmitate, propionate-stearate, butyrate-stearate, acetate-crotonate, acetate-oleate, acetate-laurate, and acetate-laurate-myristate.  A material suitable for films consists of 100 parts cellulose acetate-propionate, containing 5 to 20 per cent propionyl radicle, in 400 parts acetone to which is added triphenyl phosphate e.g. 30 parts; or for thin sheeting, 100 parts cellulose acetate-stearate, with an acetyl content of about 40 per cent, in 500 parts ethylene chloride to which is added 10 to 20 parts tricresyl phosphate. Other solvents such as ethyl acetate and chloroform-alcohol may be used and the solution may contain also other cellulose esters or ethers, natural or artificial gums, waxes, heavy metal soaps, higher fatty acids or their esters with mono- or polybasic alcohols, resins or oils.  The material may be used for spinning or in lacquers or in moulding powders.  Specifications 219,926 and 287,880, [both in Class 2 (ii), Cellulose &c.], are referred to.