Hindered bisphenol diphosphonites and stabilized synthetic resin compositions containing the same.

摘要

Hindered bisphenol diphosphonites are provided having the structure: <CHEM> wherein: A is selected from the group consisting of -S-; -O-; alkylidene having from one to about ten carbon atoms; cycloalkylidene having from about four to about eight carbon atoms; and phenylalkylidene having from seven to about twelve carbon atoms; R is selected from the group consisting of alkyl having from one to about eighteen carbon atoms; cycloalkyl having from three to about twelve carbon atoms; and aralkyl having from seven to about twelve carbon atoms; R1 is selected from the group consisting of hydrogen; alkyl having from one to about eighteen carbon atoms; cycloalkyl having from three to about twelve carbon atoms; and aralkyl having from seven to about twelve carbon atoms; R2 is selected from the group consisting of <CHEM> as well as synthetic resin compositions having an enhanced resistance to deterioration by heat and light comprising a synthetic resin and such phosphonites.