Stabilization of synthetic polymers with imidazolidine compounds
Abstract
Abstract SYNTHETIC POLYMERS SUCH AS HOMOPOLYMERS OF OLEFINS, COPOLYMERS OF OLEFINES WITH OTHER ETHYLENICALLY UNSATURATED MONOMERS, POLYURETHANES, POLYAMIDES, POLYACETALS, POLYESTERS, POLYMERIZED VINYL MONOMERS AND THE LIKE ARE STABILIZED AGAINST PHOTO- AND THERMAL-DETERIORATIONS THEREOF BY HAVING INCORPORATED THEREIN AN EFFECTIVE AMOUNT OF ONE OF THE 2,5-TRI- OR TETRASUBSTITUTED-4-OXO (OR THRIOXO)-IMIDAZOLIDINES. AMONG THESE IMIDAZOLIDINES, SOME OF THE 2,5TRI- OR TETRAUBSTITUTED-4-OXO-IMIDAZOLIDINES ARE NOVEL SUBSTANCES AND OTHER IMIDAZOLIDINES AS SUCH ARE DISCLOSED IN THE PRIOR ART. THESE NOVEL AND OLD 2,5-TRI- OR TETRASUBSTITUTED-4-OXO-IMIDZOLIDINES ARE PREPARED BY A NOVEL PROCESS WHICH COMPRISES (1) REACTING THE CORRESPONDING A-AMINONITRILE WITH AN APPROPRIATE KETONE OR ALDEHYDE IN THE PRESENCE OF A BASIC CATALYST OR (2) REACTING THE CORRESPONDING A-AMINONITRILE WITH AN APPROPRIATE KETONE OR ALDEHYDE AND THEN SUBJECTING THE INTERMEDIATE. SCHIFF BASE TO THE ACTION OF A BASIC CATALYST.
Inventors
- 👤 Keisuke Murayama
- 👤 Toshimasa Toda
- 👤 Tomoyuki Kurumada
- 👤 Ichiro Watanabe
- 👤 Syoji Morimura
- 👤 Saburo Akagi
Bibliographic Details
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