摘要 |
Compsn. (I) comprise (A) 50-80% (all pts. wt.) copolymer (II) with vinyl acetate content 5-20% and melt index 0.8-8.0 g/10 minutes (B) 10-50% C black (C) 1.0-2.5% crosslinking agent (D) 0.05-1.5% 4-hydroxy-3,5-di-tert.butylphenylpropionic acid deriv. (III). (II) has melt flow index 1-3 g/10 minutes. (I) contains 0.1-1.0% (III). (III) is octadecyl-4-hydroxy-3,5-di-tert.butylphenylpropionate (IV) and/or bis(4-hydroxy-3,5-di-tert.butylphenylpropionic acid) hydrazide (V) (mixt. of (IV) and (V) has synergistic effect). USE/ADVANTAGE - For use in conductor-smoothing and field limitation layers in medium and high tension cables. (III) do not react with crosslinking agent (peroxide) for (II), unlike sec. aromatic amines, so remain effective in stabilising (I) during processing and also do not give rise to inhomogeneous prods. which form specks and impair propert
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申请人 |
LEUNA-WERKE AG, O-4220 LEUNA, DE |
发明人 |
GOERMAR, GERHARD, DR., O-7031 LEIPZIG, DE;SEIFFARTH, KLAUS, DR., O-4090 HALLE, DE;STARK, WOLFGANG, O-4220 LEUNA, DE;STOLL, KERSTIN, O-9659 MARKNEUKIRCHEN, DE;AHNERT, KLAUS, O-4201 KOETZSCHAU, DE;NOGLIK, HARRY, DR., O-4220 LEUNA, DE;SCHULZE, NORBERT, O-7033 LEIPZIG, DE |