Disclosed herein are compounds of the structure:
wherein R
1
, R
2
, R
3
, R
4
, R
5
, and R
6
are independently selected alkyl groups, provided that R
1
is different from R
2
. The compounds are useful as stabilizers for thermoplastic resins.
Aromatic cyclic bisphosphite esters and polymeric compositions thereof
申请人:GENERAL ELECTRIC COMPANY
公开号:EP0785210A1
公开(公告)日:1997-07-23
An stabilized thermoplastic composition comprising a stabilizing amount of a phosphite of the formula:
R1 is independently selected from the group consisting of alkyl groups having from 1 to 9 carbon atoms, Y is independently selected from the group consisting of hydrogen, halogen, or alkyl; and the -O-X groups are positioned at the respective ortho- or para- positions with respect to the diphenyl linkage, the remaining ortho- and para- positions with respect to the -O-X linkage being occupied by R1 whereby the -O-X groups are hindered by the presence of at least one R1 group; R2 group is a divalent alkylidene radical having from 1 to 6 carbon atoms or a direct bond; and wherein X has the formula:
Neo diol phosphite esters and polymeric compositions thereof
申请人:GENERAL ELECTRIC COMPANY
公开号:EP0785209A1
公开(公告)日:1997-07-23
A phosphite and stabilized themoplastic composition comprising the phosphite where the phosphite has the formula:
In the above compound, R7 and R8 are preferably alkyl of from 1 to 6 carbon atoms, most preferably an unsubstituted alkyl group. R9 is preferably alkyl of 1 to 12 carbon atoms. m is from 0 to 5. The dicumyl group includes the OX groups which are the phosphite portion. The OX group is hindered by only one alkylaryl group at the ortho position with the other ortho position being occupied by hydrogen. X has the following formula:
wherein R2 is independently selected from the group consisting of alkyl groups having from 1 to 12 carbon atoms. z1 and z2 can be 0 or 1. R3, R4 and R5 are independently selected from the group consisting of hydrogen, halogen, or alkyl of from 1 to 3 carbon atoms.