Stabilized halogen-containing synthetic resins

摘要

Synthetic resin compositions containing a homo- or co-polymer of a vinyl halide are stabilised against the deteriorative effects of heat and/or light by the inclusion of a compatible chloro-phosphite of the formula: where x and y represent 0 or 1; x + y = 1 or 2; R and R1 represent the same or different aliphatic, cycloaliphatic or aromatic radicals. Co-monomers exemplified are vinyl acetate and dibutyl maleate. The phosphite stabilizers may be used in conjunction with other stabilizers such as metal salts of organic acids, metallic phenolates and diorganotin compounds e.g. salts of Cd, Zn, Pb, Sn, Ba, Sr, and Ca such as cadmium benzoate or di(t-butylbenzoate), and barium and calcium laurates; Cd, Zn, Pb, Sn, Ba, Sr, and Ca phenolates of octyl-, nonyl-, oleyl- and laurylphenol; dibutyltin-S, S1-bis-iso-octyl mercapto acetate and dibutyltin-S, S1-bis-lauryl mercaptide. The compositions may also contain plasticisers e.g. dioctyl phthalate or dibutyl sebacate. Many examples of suitable phosphites are given and their preparation is described (see Group IV(b)).ALSO:Chlorophosphites of the general formula: wherein x and y are 0 or 1; x + y = 1 or 2; and R and R1 are the same or different aliphatic, cycloaliphatic or aromatic radicals used to stabilize vinyl halide resins (see Group IV(a)) may be prepared by reacting phosphorus trichloride with an alcohol or phenol. Nonstoichiometric proportions may be used to yield mixtures of mono- and di-chlorophosphites. Many compounds are mentioned including several containing chlorine as a substituent in the group(s) R. Examples describe the preparation of chlorodi(nonylphenyl) phosphite, chlorodi (octyl) phosphite, dichloro (octylphenyl) phosphite and chloro (octylphenyl)-2-chloroethyl-phosphite. Mention is also made of the reaction products of (a) 1 mole dichloro (nonylphenyl) phosphite and 1 mole epoxidised glyceryl mono-oleate; (b) 1 mole dichloro (octylphenyl) phosphite and 1 mole epoxidised glyceryl monoricinoleate; (c) 1 mole dichloro (octyl) phosphite and 1 mole butyl epoxystearate; (d) 1 mole dichloro (octylphenyl) phosphite and 1 molenonyl phenyl glycidyl ether; and (e) 1 mole dichloro (nonylphenyl) phosphite and 1 mole tetrahydrofurfuryl epoxystearate.