Process for preparing hindered amine light stabilizers

Details Process for preparing hindered amine light stabilizers Process for preparing hindered amine light stabilizers

1991-04-24

1993-01-19

Cintins, Marianne M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546242, C01D40112

Patent

active

051808307

ABSTRACT:
Disclosed is a process for the preparation of hindered amine light stabilizers by reacting (a) an alkyl substituted-4-hydroxypiperidine with (b) a dicarboxylic acid ester, in the presence of a catalyst system comprising a basic inorganic compound and a polar aprotic organic compound.

REFERENCES:
patent: 4021432 (1977-05-01), Holt et al.
patent: 4461898 (1984-07-01), Meier et al.

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