Phosphites, process for producing the same and their use
AssigneeSumitomo Chemical Company, Limited
InventorsNaoki Inui, Taketoshi Kikuchi, Kanako Fukuda, Takashi Sanada
Life of this patent
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Abstract
A phosphite stabilizer for organic material is represented by the formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.4 and R.sup.5 is hydrogen, alkyl, cycloalkyl, alkyl, cycloalkyl, aralkyl or phenyl; R is hydrogen or alkyl; X is a direct bond, sulfur atom or a --CHR.sup.6 group in which R.sup.6 represents hydrogen, alkyl or cycloalkyl; A is an alkylene group having 2 to 8 carbon atoms or *--COR.sup.7 -- in which R.sup.7 is a direct bond or alkyl group, and * represents the bond to the oxygen atom of the phenoxy radical; and one of Y and Z represents a hydroxyl group, an alkoxy group or an aralkoxy group and the other one represents atom or an alkyl group.
Claims11
A phosphite represented by the formula (I):
- ##STR5## wherein R.sup.1, R.sup.2, R.sup.4 and R.sup.5 each independently represent hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, an alkylcycloalkyl group having 6 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms or a phenyl group;
- R.sup.3 represents hydrogen atom or an alkyl group having 1 and 8 carbon atoms;
- X represents a direct bond, sulfur atom, or a --CHR.sup.6 group in which R.sup.6 represents hydrogen atom, an alkyl group having 1 to 8 carbon atoms or a cycloalkyl group having 5 to 8 carbon atoms;
- A represents an alkylene group having 2 to 8 carbon atoms or a *--COR.sup.7 -- group in which R.sup.7 represents a direct bond or an alkylene group having 1 to 8 carbon atoms, and * represents the bonds to the oxygen;
- and one of Y and Z represents a hydroxyl group, an alkoxy group having 1 to 8 carbon atoms or an aralkyloxy group having 7 to 12 carbon atoms and the other one represents hydrogen atom or an alkyl group having 1 to 8 carbon atoms.
Dependencies are inferred from the claim text.