05854374 is referenced by 2 patents and cites 5 patents.

A process for producing a polycarbonate including melt polycondensing an aromatic dihydroxy compound and a carbonic acid diester in the presence of a phosphonium borohydride catalyst(I), ##STR1## wherein R is a straight-chain or branched alkyl group, or ##STR2## wherein each of R.sub.1, R.sub.2, and R.sub.3, independently is a C.sub.1 .about.C.sub.4 alkyl group. A colorless, transparent polycarbonate having a high molecular weight is obtained by using the phosphonium borohydride compound (I) as a transesterification catalyst, which may be used alone or incorporated with boric acid or a hindered phenol antioxidant.

Title
Phosphonium borohydride compound and process for producing polycarbonate using said compound
Application Number
8/882588
Publication Number
5854374
Application Date
June 25, 1997
Publication Date
December 29, 1998
Inventor
Jen Tau Gu
Tainan
TW
Chun Shan Wang
Tainan
TW
Agent
Fish & Richardson P C
Assignee
National Science Council
TW
IPC
C08G 64/00
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