Phosphorus-containing compounds, their production and their use as antioxidants

摘要

Phosphorus-containing compounds of the formula: <IMAGE> (I) wherein R1 and R2 are each a hydrogen atom or a lower alkyl group, and R3 is a lower alkyl or phenyl group. These compounds may be used as stabilizers against the action of heat, light and oxygen for organic substances and especially polyolefin resins. These phosphorus-containing compounds may be used in conjunction with other stabilizers such phenol-type and sulfur-containing antioxidants, especially in polyolefin resin compositions to produce a polyolefin resin composition having excellent resistance to light, heat and oxygen. The present invention also relates to a method of producing the compounds of the aforementioned formula by reacting <IMAGE> (II) with a disubstituted phosphonate of the formula <IMAGE> (III) wherein R1, R2 and R3 are as defined above.