| 摘要 |
<p>1336898 Colouring PVC CIBA-GEIGY AG 8 June 1971 [8 June 1970] 19501/71 Heading C3P [Also in Division C4] Polyvinyl chloride film is coloured in red, blue, violet, brown and grey shades by incorporating therein a disazo pigment of formula wherein R is an aromatic radical, V is -O-, -S- or -NR 1 -, R 1 being H or C 1-4 alkyl, Z is the atoms necessary to complete a 5- or 6- membered ring, which atoms can also form part of a benzene ring and X is a H or halogen atom or an alkoxy, CN or NO 2 group (see Divisions C4-C5). In an example, stabilized polyvinyl chloride, dioctyl phthalate and a pigment as above are worked on a roller mill to give an orange-brown foil.</p> |
