Polyalkyl-1-oxa-3,8-diazaspiroÝ4,5¨decan-4-one compounds

摘要

Polyalkyl-1-oxa-3,8-diazaspirodecane compounds of formula (I) are new; in which n, m = 0-100 but not n = m = 0; R<1> = hydrogen (H), 5-7C cycloalkyl or 1-12C alkyl; R<2>, R<3> = H or 1-18C alkyl or CR<2>R<3> = a 5-13-membered ring or Pip'; Pip' = a substituted piperidin-4,4-diyl group of formula (II); R<4>, R<5> = H, 1-22C alkyl, an oxygen radical (O*), hydroxyl (-OH), nitroso (-NO), cyanomethyl (-CH2CN), benzyl, allyl, 1-30C alkoxy, 5-12C cycloalkoxy, a 6-10C aryloxy or 7-20C arylalkoxy group (with optionally substituted aryl group), 3-10C alkenyl, 3-6C alkynyl, 1-10C acyl, halogen or 7-9C phenylalkyl (with optionally 1-4C alkyl-substituted phenyl ring). Also claimed are (i) mixtures of (I) and (a) stabiliser(s) based on sterically hindered amine(s), (b) polymeric hindered amine light stabiliser (HALS) compounds, (c) phosphorus stabiliser(s), (d) ultraviolet (UV) absorber(s), (e) N,N-dialkyl-substituted hydroxylamine(s), (f) basic or other acid-binding costabilisers and/or (g) sterically hindered phenolic antioxidants and optionally synergistic additives; and (ii) combinations of (I) and organic or inorganic dyes or pigments.