| abstract |
(57) [Abstract] [Purpose] Providing a method for improving the storage stability of organic phosphite or phosphonite [Structure] To stabilize organic phosphite, phosphonite, or a mixture of organic phosphite or phosphonite against hydrolysis A compound of sterically hindered amines is added as a stabilizer, such that the stabilized phosphite or phosphonite is 0.1 to 25% by weight (based on phosphite or phosphonite) amine compound. A method comprising: [Effect] A composition containing an organic phosphite or phosphonite and a sterically hindered amine has remarkable hydrolytic stability and has a long shelf life even at high atmospheric humidity. The products according to the method of the invention are useful as stabilizers for organic materials, in particular organic polymers, such as synthetic polymers, against the damaging effects of heat, oxygen and / or light. |