申请人:King Roswell E.
公开号:US20100240810A1
公开(公告)日:2010-09-23
Disclosed are mixtures of oxyalkylene bridged bis- and tris-phosphite esters of formulae I and II
where R is hydrogen or methyl, n and n′ are independently an integer from 1 to 45 and R
1
, R
2
and R
3
are each independently hydrogen, straight or branched chain alkyl of 1 to 12 carbon atoms, phenylalkyl of 7 to 9 carbon atoms, phenylalkyl of 7 to 9 carbon atoms substituted on the phenyl ring by one to three straight or branched chain alkyl of 1 to 12 carbon atoms or R
1
, R
2
and R
3
are each independently —(CH
2
)
k
—COOR
4
where k is 0, 1 or 2 and R
4
is hydrogen or straight or branched chain alkyl of 1 to 20 carbon atoms. The mixtures of formula I and II are liquid at ambient conditions and are effective stabilizers for polyolefins.