abstract |
Compositions comprisingA) a polyolefin or polyolefin copolymer, andB) a compound of the formula IwhereinR1 is O or O-X-O;R2, R3, R4 and R5 independently are hydrogen, halogen, C1-C8alkyl, C1-C8alkoxy, SR10,SO2R10, phenyl, CF3, COOR11; and wherein R2 and R3 also may be OH;R6 and R7 are H or C1-C8alkyl;R8 and R9 are H, C1-C8alkyl or allyl;R10 is phenyl or C1-C12alkyl;R11 is C1-C8alkyl; C3-C50alkylene interrupted by one or more O; cyclohexyl; benzyl; allyl;X is C2-C18alkylene; C3-C12hydroxyalkylene; or a group selected from those of the formulaewhere D and D' independently are a direct bond or C1-C3alkylene; andY is O, S, SO2, or C1-C3alkylene, e.g. polyethylene films, are well stabilized against the effects of light, oxygen and heat. Some novel compounds of component B are valuable stabilizers for organic material against damage by light, oxygen and/or heat. |