摘要:
Synthetic polymers which possess outstanding stability to oxidative, thermal or light-induced degradation comprise as stabilizer at least a compound of the formula I wherein R1 and R2 are each independently of one another hydrogen or C1-C8alkyl, R3 and R4 are each independently of one another C1-C12alkyl, and R5 is C1-C7alkyl.
摘要:
The present invention describes a process for preventing the formation of aldehydic contaminants in polyether polyols, polyester polyols or polyurethanes which comprises incorporating into said polyether polyols, polyester polyols or polyurethanes an effective amount of a) a phenolic antioxidant, b) one or more compounds selected from (i) aminic antioxidants, (ii) benzofuran-2-ones, and (iii) phosphites or phosphonites, or (iv) mixtures thereof.
摘要:
The present invention describes a process for preventing the formation of aldehydic contaminants in polyether polyols, polyester polyols or polyurethanes which comprises incorporating into said polyether polyols, polyester polyols or polyurethanes an effective amount of a) a phenolic antioxidant, b) one or more compounds selected from (i) aminic antioxidants, (ii) benzofuran-2-ones, and (iii) phosphites or phosphonites, or (iv) mixtures thereof.
摘要:
Polyether polyols, polyester polyols or polyurethanes which possess outstanding stability to oxidative, thermal or light-induced degradation and which possess a reduced fogging contribution of the polymers comprise at least a liquid compound of the formula (I) wherein R1 is C1-C4alkyl, R2 is a branched C12-C25alkyl, and X is C1-C8alkylene or C1-C4alkyl substituted C2-C8alkylene.
摘要:
The present invention describes a process for preventing the formation of aldehydic contaminants in polyether polyols, polyester polyols or polyurethanes which comprises incorporating into said polyether polyols, polyester polyols or polyurethanes an effective amount of a) a phenolic antioxidant and b) one or more compounds selected from (i) aminic antioxidants, (ii) benzofuran-2-ones, (iii) phosphites or phosphonites and (iv) mixtures thereof.