The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 17, 1976
Filed:
Oct. 22, 1974
Keisuke Murayama, Hiro, JA;
Syoji Morimura, Hiro, JA;
Takao Yoshioka, Hiro, JA;
Toshimasa Toda, Hiro, JA;
Eiko Mori, Hiro, JA;
Hideo Horiuchi, Hiro, JA;
Susumu Higashida, Hiro, JA;
Katsuaki Matsui, Hiro, JA;
Tomoyuki Kurumada, Hiro, JA;
Noriyuki Ohta, Hiro, JA;
Hisayou Ohsawa, Hiro, JA;
Sankyo Company Limited, Tokyo, JA;
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.