The present invention provides a resin composition which can result in a cured film which has chemical resistance, low stress property, and high elongation property even by a heat treatment at a low temperature.
The resin composition comprising an alkali-soluble resin (a) which contains a phenol skeleton having a crosslinking group and a phenol skeleton not having a crosslinking group and which has a weight average molecular weight in the range of 1,000 to 50,000, wherein the content ratio of the phenol skeleton having a crosslinking group to the total 100% by mole of structural units of the phenol skeleton having a crosslinking group and the phenol skeleton not having a crosslinking group is in the range of 5 to 90% by mole.
Synthesis of sterically hindered aromatic aldehydes
作者:A. P. Yakubov、D. V. Tsyganov、L. I. Belen'kii、M. M. Krayushkin
DOI:10.1007/bf00961246
日期:1991.7
Formylation of mesitylene, durene, and m-xylene derivatives containing electron-donor and electron-acceptor substituents by dichloromethyl methyl ether was studied in the presence of TiCl4. A series of functionally substituted sterically hindered benzaldehydes was prepared from the products of these reactions.
Unusual effects of steric hindrances in NMR spectra of o,o′-dialkylsubstituted benzylidene dichlorides
It has been found that steric hindrances of the CHCl2 group rotation around C(Ar)-CHCl2 bond in o,o'-dialkylsubstituted benzylidene dichlorides call forth a non-equivalence of the alkyls in positions 2 and 6. The non-equivalence displays in H-1 and C-13 NMR spectra at room temperature and at -20 degrees-C. At the latter temperature, the spectra of 2,4,6-trimethyl-3-chloromethylbenzylidene dichloride and bis(dichloromethyl)mesitylene indicate the presence of two conformations, the assignment of signals having been accomplished for each of them.
RESIN COMPOSITION
申请人:TORAY INDUSTRIES, INC.
公开号:US20190086800A1
公开(公告)日:2019-03-21
The present invention provides a resin composition which can result in a cured film which has chemical resistance, low stress property, and high elongation property even by a heat treatment at a low temperature.
The resin composition comprising an alkali-soluble resin (a) which contains a phenol skeleton having a crosslinking group and a phenol skeleton not having a crosslinking group and which has a weight average molecular weight in the range of 1,000 to 50,000, wherein the content ratio of the phenol skeleton having a crosslinking group to the total 100% by mole of structural units of the phenol skeleton having a crosslinking group and the phenol skeleton not having a crosslinking group is in the range of 5 to 90% by mole.