5-Membered cyclic phosphonates and compositions thereof

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...


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252400A, 260936, 524117, C07F 928, C08K 553




2-[Alkyl substituted-phenoxy]-2,3-dihydro-1,2-benzoxaphosphole 2-oxide, cyclic phosphonates prepared, for example from hindered phenols and ortho-methylolphenols, are effective heat stabilizers and antioxidants for organic materials subject to degradation by heat, oxygen and the like, and result in effective stabilizer systems when combined with hydroxyphenylalkylenyl isocyanurates.

patent: 3796684 (1974-03-01), Dever et al.
patent: 4025486 (1977-05-01), Gilles
patent: 4276232 (1981-06-01), Rasberger


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