发明名称 |
Block oligomers containing 1-hydrocarbyloxy-2,2,6,6-tetramethyl-4-piperidyl groups as stabilizers for organic materials |
摘要 |
A product obtainable by transferring groups of formula (G-I) being present in a block oligomer having a polydispersity {overscore (M)}w/{overscore (M)}n of 1 to 1.7 and corresponding to formula (I) to groups of formula (Gu-II), wherein R1 is a hydrocarbyl radical or -O-R1 is oxyl; said transfer is carried out by reaction of the block oligomer with a hydroperoxide in a hydrocarbon solvent in the presence of a peroxide decomposing catalyst; n is a number from 2 to 14; R2 is for example C2-C12alkylene; A is for example -N(R4)(R5); R4 and R5 are for example C1-C18alkyl; R is preferably a group of formula (G-I) and B and B* have one of the meanings given for A; with the proviso that in the individual recurrent units of formula (I), each of the radicals B, R and R2 has the same or a different meaning. The products are useful as light stabilizers, heat stabilizers and oxidation stabilizers for organic materials, in particular synthetic polymers.
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申请公布号 |
US6409941(B1) |
申请公布日期 |
2002.06.25 |
申请号 |
US19990424141 |
申请日期 |
1999.11.18 |
申请人 |
CIBA SPECIALTY CHEMICALS CORP. |
发明人 |
GALBO JAMES PETER;LELLI NICOLA;BORZATTA VALERIO;WOLF JEAN-PIERRE;ACKERMAN MICHAEL;PICCINELLI PIERO |
分类号 |
C07D401/14;C07D493/10;C08G73/06;C08K5/16;C08K5/3492;C08L23/02;C08L23/10;C08L79/02;(IPC1-7):C07D401/12;C08K5/349 |
主分类号 |
C07D401/14 |
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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