Liquid Phosphite Compositions Having Different Alkyl Groups

Abstract

A composition comprising a mixture of at least two different alkylaryl phosphites, wherein some alkyl groups have a different number of carbon atoms than other alkyl groups and wherein the mixture is a liquid at ambient conditions.

What is claimed is: 
     
         1 . A phosphite composition of at least two different alkylaryl phosphites, comprising at least a first alkylaryl phosphite and a second alkylaryl phosphite of structure (XI) 
       
         
           
           
               
               
           
         
       
       wherein m, n, o, p and q are integers independently selected from 0, 1, 2 and 3 provided that m+n+o+p+q=3
 each Ar is an independently selected aromatic moiety of 6 to 18 carbon atoms, 
 each R 8  is a straight or branched C 1 -C 18  alkyl group having the same number of carbon atoms, 
 each R 9  is a straight or branched C 1 -C 18  alkyl group having the same number of carbon atoms, provided that R 8  has a different number of carbon atoms than R 9 , said first aralkyl phosphite contains an aromatic moiety substituted by at least one R 8  and said second aralkyl phosphite contains an aromatic moiety substituted by at least one R 9 , 
 the molar ratio of R 8  groups to R 9  groups in the phosphites of the composition is from 1:10 to 10:1, 
 and from 0 to 10% by weight of one or more free phenol having the structure: 
 
       
         
           
           
               
               
           
         
       
       based on the combined weight of all phosphites and said free phenol in the composition, wherein the phosphite composition comprises one or more tris(monoalkylaryl) phosphites of structure (XI) wherein m, p and q are 0 and n+o=3, in an amount from 20 to 80 weight percent based on the total weight of all phosphites in the phosphite composition, wherein the composition is a liquid at ambient conditions. 
     
     
         2 . The composition of  claim 1 , wherein the composition comprises one or more bis(monaoalkylaryl)dialkylaryl phosphites of structure (XI) wherein m+p+q=1 and n+o=2, in an amount from 15 to 60 weight percent. 
     
     
         3 . The composition of  claim 2 , wherein the composition comprises one or more bis(dialkylaryl)alkylaryl phosphites of structure (XI) wherein m+p+q=2 and n+o=1, in an amount from 2 to 20 weight percent. 
     
     
         4 . The composition of  claim 3 , wherein the composition comprises one or more tris(dialkylaryl) phosphites of structure (XI) wherein m+p+q=3 and n and o are 0 in an amount from 0.1 to 20 weight percent. 
     
     
         5 . The composition of  claim 1 , wherein the composition comprises from 0.01 to 5 weight percent of said phenols based on the total weight of all phosphites and said free phenol in the composition. 
     
     
         6 . The phosphite composition of  claim 1 , wherein R 8  and R 9  are selected from propyl, n-butyl, sec-butyl, t-butyl, n-amyl, sec-amyl, neo-amyl and t-amyl. 
     
     
         7 . The composition of  claim 1 , comprising a first alkylaryl phosphite having the structure: 
       
         
           
           
               
               
           
         
       
       and a second alkylaryl phosphite having the structure: 
       
         
           
           
               
               
           
         
       
       wherein a, b, c, and d are independently integers selected from 0, 1, 2, and 3, provided that a+b=3 and c+d=3, wherein each Ar is phenyl, and wherein each R 8  is an alkyl group having the same number of carbon atoms, and each R 9  is an alkyl group having the same number of carbon atoms, provided that R 9  has a different number of carbon atoms than R 8 . 
     
     
         8 . The composition of  claim 7 , wherein R 8  is propyl or t-butyl. 
     
     
         9 . The composition of  claim 7 , wherein R 9  is t-amyl. 
     
     
         10 . The composition of  claim 7 , wherein R 8  is t-butyl and R 8  is t-amyl. 
     
     
         11 . A phosphite composition of  claim 1 , wherein at least one of the first or second phosphites has the structure. 
       
         
           
           
               
               
           
         
       
       wherein e, f, g and h are independently selected from 0, 1 and 2, provided that e+f+g+h=3, e+f=1 or 2, and g+h=1 or 2, Ar is phenyl, R 8  and R 9  are independently selected from straight or branched C 1 -C 18  alkyl groups, provided that R 8  has a different number of carbon atoms than R 9 . 
     
     
         12 . The composition of  claim 11 , wherein R 8  is propyl or t-butyl. 
     
     
         13 . The composition of  claim 11 , wherein R 9  is t-amyl. 
     
     
         14 . The composition of  claim 11 , wherein R 8  is t-butyl and R 9  is t-amyl. 
     
     
         15 . The phosphite composition of  claim 1 , wherein least one of the first or second alkylaryl phosphites is of the structure (XI) wherein m is an integer selected from 1, 2 and 3; n, o, p and q are integers independently selected from 0, 1 and 2, provided that m+n+o+p+q=3, wherein each Ar is phenyl, and wherein each R 8  is an alkyl group having the same number of carbon atoms and each R 9  is an alkyl group having the same number of carbon atoms, provided that R 8  has a different number of carbon atoms than R 9 . 
     
     
         16 . The composition of  claim 15 , wherein R 8  is propyl or t-butyl. 
     
     
         17 . The composition of  claim 15 , wherein R 9  is t-amyl. 
     
     
         18 . The composition of  claim 15 , wherein R 8  is t-butyl and R 9  is t-amyl. 
     
     
         19 . A stabilized polymer composition comprising a polymer and the phosphite composition of  claim 1 .