Patent GB-366461-A (GB)
Title: Improvements in or relating to compositions of matter
IPC: C08K5/523
Filed: 1930-07-29
Abstract: Aryl phosphates, such as triphenyl or tricresyl phosphates, are used to impart flexibility to polyvinyl esters such as those obtainable by polymerizing vinyl acetate, vinyl chloracetate or vinyl propionate or to other polymerized vinyl compounds such as polymerized styrol. Vinyl compounds may be polymerized by any suitable method, for example by the application of heat, exposure to sunlight or by both of these methods and catalysts may be added, the polymerization preferably being stopped when the compound obtained becomes plastic under the action of heat and pressure but is sufficiently rigid at temperatures to which it may be subjected while in use.  The aryl phosphates may be incorporated with the vinyl compounds in any convenient manner such as before the polymerization or blended with a polymerized vinyl compound which has been soaked in a solvent such as acetone, ethyl lactate, methyl ethyl ketone, ethyl alcohol, methyl alcohol, chloroform, benzol, or amylacetate or mixtures thereof.  By increasing the quantity of solvent liquid products suitable for impregnation purposes may be obtained.  Other desired substituents such as halogenatep aromatic compounds, resins such as ester gum, plasticizers other than aryl phosphates such as camphor, dibutyl phthalate, diethyl phthalate, dibutyl tartrate, p-ethyltoluenesulphonamide or triacetin may be added.  The products have valuable electrical insulating properties and they p  may be used for the impregnation of textile fabrics and other materials for example by the passage of the fabric through a liquid composition containing a polymerized vinyl compound and an aryl phosphate, or used in the production of transparent sheet material.  In examples compositions comprising polymerized vinyl acetate and tricresyl phosphate with or without the addition of dibutyl tartrate are described.ALSO:Aryl phosphates, such as triphenyl or tricresyl phosphates are used to impart flexibility to polyvinyl esters such as those obtainable by polymerizing vinyl acetate, vinyl chloracetate or vinyl propionate or to other polymerized vinyl compounds such as polymerized styrol.  Vinyl compounds may be polymerized by any suitable method, for example by the application of heat, exposure to sunlight, or by both of these methods and catalysts may be added, the polymerization preferably being stopped when the compound obtained becomes plastic under the action of heat and pressure but is sufficiently rigid at temperatures to which it may be subjected while in use.  The aryl phosphates may be incorporated with the vinyl compounds in any convenient manner such as before the polymerization or blended with a polymerized vinyl compound which has been soaked in a solvent such as acetone, ethyl lactate, methyl ethyl ketone, ethyl alcohol, methyl alcohol, chloroform, benzol, or amylacetate or mixtures thereof.  Other desired substituents such as halogenated aromatic compounds, resins such as ester gum, plasticizers other than aryl phosphates such as camphor, dibutyl phthalate, diethyl phthalate, dibutyl tartrate, p-ethyltoluenesulphonamide or triacetin may be added. In examples compositions comprising polymerized vinyl acetate and tricresyl phosphate with or without the addition of dibutyl tartrate are described.