| 摘要 |
Plasticized organic polymer compositions are prepared by incorporating in the organic polymer one or more compounds of formula <FORM:0922251/IV(a)/1> where R1 and R2, which may be the same or different, are alkyl or aryl radicals which may be substituted by halogen, ether, ester or nitrile groups (see Group IV(b)). Specified organic polymers are cellulose esters and ethers, polyvinyl compounds such as polyvinyl chloride and acetate, polystyrene chlorinated rubber, alkyd resins, polyesters, polycarbonates, polymers of acrylic acid and its derivatives, polyethylene and polypropylene. Known plasticizers may also be used. Examples use cellulose triacetate, polystyrene, a-polycarbonate derived from 4,41-dihydroxy-2,2-diphenylpropane, and polyvinyl chloride. Shaped articles may be prepared from the plasticized compositions. Examples are given of the production of films of cellulose triacetate plasticized with pentaerythritol phosphate esters.ALSO:The invention comprises compounds of the formula <FORM:0922251/IV(a)/1> where R1 and R2, which may be the same or different, are alkyl or aryl radicals which may be substituted by halogen, ether, ester or nitrile groups. These compounds are plasticizers (see Group IV(a)) and may be prepared by (i) heating pentaerythritol in an inert solvent with POCl3 and alcohols or phenols, (ii) heating pentaerythritol with alcohol or phenol phosphates, or (iii) reacting alcohols or phenols with <FORM:0922251/IV(a)/2> itself prepared by heating pentaerythritol in excess POCl3. In examples, R1 and R2 are phenyl, p-tolyl, ethyl, dodecyl, ethoxyethyl, cyanoethoxyethyl, p-carbethoxyphenyl, and p-chlorophenyl. |
