Piperidine-spiro-hydantoin derivatives and their use as stabiliz

Details Piperidine-spiro-hydantoin derivatives and their use as stabiliz Piperidine-spiro-hydantoin derivatives and their use as stabiliz

1974-10-22

1976-08-17

Jacobs, Lewis T.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 458NE, 260 458NT, C08K 534, C08K 551

Patent

active

039754626

ABSTRACT:
Piperidine-spiro-hydantoin derivatives having the formula ##SPC1##
Wherein X represents oxygen atom or sulfur atom; n is an integer of 1 to 4 inclusive, and R represents various aliphatic or aromatic groups depending on the value of n.
These compounds (I) are useful as stabilizers against photo and thermal deterioration of various synthetic polymers and can be prepared, for example, by reacting the corresponding 3-unsubstituted piperidine-spiro-hydantoin compound with the halide R-(X.sub.1).sub.n in which R and n are as defined herein and X.sub.1 is a halogen atom.

REFERENCES:
patent: 2143816 (1939-01-01), Jacobson
patent: 2225384 (1940-12-01), Graenacher et al.
patent: 2551134 (1951-05-01), Jennings
patent: 2687416 (1954-08-01), Persch et al.
patent: 2778825 (1957-01-01), Melamed
patent: 2928841 (1960-03-01), McConnell et al.
patent: 3213104 (1965-10-01), Cashin et al.
patent: 3542729 (1970-11-01), Murayama et al.
patent: 3705126 (1972-12-01), Matsui et al.

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