| abstract |
Expandable styrene polymers containing a) 0 to 90 % wt. of a styrene polymer different from b) or a styrene copolymer with at least 50 % wt. monopolymerised styrene, b) 10 to 100 % wt. of a styrene/methacrylamide copolymer consisting to the extent of 0.5 to 50 % wt. of at least one monopolymerised N-substituted methacrylamide of general formula (I) in which R?1 and R2¿ are the same or different and are hydrogen, C¿1? to C15 alkyl, C6 to C16 cycloalkyl or C6 to C20 aryl, and in the case of constitutents R?1 and R2¿ with at least 2 carbon atoms, at least 2 carbon atoms may be cross-linked via hetero atoms, and c) 1 to 15 % wt., related to the sum of a) and b), or an aliphatic C¿3? to C9 hydrocarbon and/or carbon dioxide as the foaming agent. |