The present invention provides mixture of at least two novolak resins with a molecular weight distribution overlap of at least 50 % and having dissolution rates which differ by a factor of at least 2.0. A method is also provided for producing such novolak resin mixtures.
申请公布号
WO9407955(A1)
申请公布日期
1994.04.14
申请号
WO1993US09122
申请日期
1993.09.24
申请人
HOECHST CELANESE CORPORATION
发明人
LU, PING-HUNG;CANIZE, ANTHONY;KHANNA, DINESH, N.;RAHMAN, M., DALIL
