| 摘要 |
The Michael addition products of N-hydroxy hindered amines with alpha, beta-unsaturated carbonyl compounds including derivatives of esters, amides, imides and anhydrides are effective stabilizers for protecting organic polymers from the deleterious effects of actinic light. These are compounds of formulas I to VIII (see formula I) (see formula II) (see formula III) (see formula IV) (see formula V) (see formula VI) (see formula VII), or (see formula VIII) wherein G1 and G2 are groups such as C1-C4 alkyl, each of R1 to R5 is a group such as H or CH3, X is a group such as C1-C18 alkoxy, Y is a group such as -O-, Z is a group such as -NH-CO-NH, L is a group such as -O-R10-O- in which R10 is a group such as C2-C18 alkylene, G is a group such as C1-C12 alkylene, and E and T are n-valent radicals such as carboxyl and n is an integer from 1 to 4.
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