| 摘要 |
Thermoplastic synthetic moulding compositions suitable for the production of optically high grade mouldings are prepared from a copolymer which includes units of radically polymerisable monomers which contain in their molecule components giving protection against UV light. The specified monomers include those in which the UV stabilising group is a 2-hydroxyphenyl-benzotriazole, 2-hydroxy-benzophenone, 2-hydroxyacetophenone, alpha -cyano- beta , beta -diphenyl, hydroxy-containing benzoic acid ester, oxalanilide, p-aminobenzoic acid ester or 6,8-dialkyl-4-oxo-5-chromanyl group. |
