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An improved polyolefin pipe or wire and coating composition having improved resistance to deterioration in the presence of chlorinated and nonchlorinated water and having improved resistance to temperatures in the range of about 0°C., as well as in cool water consisting of a blend of: (a) about 93 t

An improved polyolefin pipe or wire and coating composition having improved resistance to deterioration in the presence of chlorinated and nonchlorinated water and having improved resistance to temperatures in the range of about 0°C., as well as in cool water consisting of a blend of: (a) about 93 to about 99.5 percent by weight of an isotactic poly-1-butene polymer; (b) about 0.05 to about 0.50 percent by weight of a hindered amine UV stabilizer; (c) about 0.05 to about 1.1 by weight of a hindered phenolic thermal stabilizer having a molecular weight above 530; (d) about zero to about 0.5 percent by weight of a nucleating agent; (e) about zero to about 4 percent by weight of a pigment; (f) about zero to about 3.0 percent by weight of a filler; and (g) up to about 3.0 percent by weight of a chelating agent.

대표청구항 ▼

A composition for use in a cool water carrying system consisting of a polymeric blend of: (a) about 93 to about 99.5 percent by weight of an isotactic alpha olefin polymer having 2-6 carbon atoms; (b) about 0.05 to about 0.5 percent by weight of N,N′-bis(2,2,6,6-tetramethyl-4-piperidinyl)-1,6-hexane

A composition for use in a cool water carrying system consisting of a polymeric blend of: (a) about 93 to about 99.5 percent by weight of an isotactic alpha olefin polymer having 2-6 carbon atoms; (b) about 0.05 to about 0.5 percent by weight of N,N′-bis(2,2,6,6-tetramethyl-4-piperidinyl)-1,6-hexane diamine polymer with 2,4,6-trichloro-1,3,5-triazine and 2,4,4-trimethyl-1,2-pentanamine; (c) about 0.05 to about 1.1 percent by weight of a hindered phenolic thermal stabilizer having a molcular weight above 530 and selected from the group consisting of: 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxy-benzyl)benzene, octadecyl 3,5-di-tert-butyl-4-hydroxyhydrocinnamate, tetrakis[methylene(3,5-di-tert-butyl-4-hydroxy-hydro-cinnamate)]methane, 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-triazine-2,4,6-(1H,3H,5H)-trione, bis-[3,3-bis(4′hydroxy-3′tert-butyl-phenyl)-butanoic acid]-glycolester, tris(3,5-di-t-butyl-4-hydroxybenzyl)isocyanurate and mixtures thereof; (d) from about zero to about 0.5 percent by weight of a nucleating agent; (e) about zero to about 4 percent by weight of a pigment; (f) about zero to about 3 percent by weight of a filler; and (g) about 0.1 to about 3 percent by weight of a chelating agent selected from the group comprising: 2,2′-oxamidobis-ethyl 3-(3,5-di-t-butyl-4-hydroxy-phenyl)propionate, N′N′-bis[3-(3,5-di-tert-butyl-4-hydroxy-phenyl)]propionyl hydrazine, calcium bis(mono-ethyl(3,5-di-tert-butyl-4-hydroxy-benzyl)phosphonate, and tris(2-t-butyl-4-(2-methyl-4-hydroxy-5-t-butylphenylthio)-5-methyl)phenylphosphite.