发明名称 |
Use of n,n-dialkylhydroxylamines and their preparation n,n- |
摘要 |
<p>The compounds of the formula (I) <CHEM> wherein R1 and R2 are independently alkyl of 8 to 36 carbon atoms, are useful for stabilizing a poly(arylene sulfide) resin, a modified polystyrene or a polymer containing a diene component against thermal, oxidative or actinic degradation. N,N-Dialkylhydroxylamines of the formula (I) can be prepared by an improved process involving a reverse Michael reaction of the N-oxides of the corresponding beta -dialkylaminopropionic esters, amides or nitriles or of beta -dialkylaminosuccinyl esters or imides. N,N-Dialkylhydroxylamines of the formula (I) can also be prepared by an improved process involving the direct oxidation of the corresponding N,N-dialkylamines with aqueous hydrogen peroxide in a lower alkanol solvent.</p> |
申请公布号 |
HK1000210(A1) |
申请公布日期 |
1998.02.06 |
申请号 |
HK19970101729 |
申请日期 |
1997.09.05 |
申请人 |
CIBA SPECIALTY CHEMICALS HOLDING INC. |
发明人 |
RAVICHANDRAN RAMANATHAN;PATEL, AMBELAL, R.;CORTOLANO, FRANK, P.;THOMAS, RICHARD, W.;PASTOR, STEPHEN, D.;ODORISIO PAUL |
分类号 |
C07C67/00;C07C239/00;C07C239/08;C08K5/16;C08K5/17;C08K5/32;C08L9/00;C08L25/04;C08L51/04;C08L81/00;C08L81/02;C09K15/20;(IPC1-7):C08K;C07C;C08L |
主分类号 |
C07C67/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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