| 摘要 |
Olefinic polymers thermically stable are obtained by addition during polymerization of compounds of monomeric or oligomeric type, containing in the molecule one or more steric hindered piperidinic groups having formula: <CHEM> wherein R1, R2 = C1-C4 alkyl radicals or rings of tetramethylpiperidine or together they form with the piperidinic carbon atom they are bound to a C5-C10 cycloalkylic group. R3, R4 = C1-C18 alkyl groups or together they form with the carbon atom they are bound to a C5-C10 cyclo-alkylic group. R5 DIVIDED R9, Z=H or an organic radical preferably a C1-C18 alkyl, C3-C12 alkenyl, C7-C18 aralkyl radical. |
