| 摘要 |
1412994 PVC composition NL INDUSTRIES Inc 18 Oct 1972 [26 Oct 1971] 48099/72 Heading C3P A PVC composition comprises polyvinyl chloride having an inherent viscosity of at least 1À1, a plasticizer having a vapour pressure not above 0À2 dyne/cm.<SP>2</SP> at 160‹ C., a stabilizer chosen from normal or basic lead compounds, organo-tin compounds, lead-barium or cadmium-barium compounds, an anti-oxidant chosen from phenols, substituted bis-phenols, and diesters of thio-dipropionic acid and as filler a Group IIA metal sulphate. Commerical plasticizers specified are n-alkyl trimellitates, a dipentaerythritol ester, and medium and high molecular weight polyesters. |
