Patent ID: 8652604
Filing Date: 2014-02-18
Classification: C08K,Y10T

Abstract:
1. A method for the production of a pipe, comprising forming a drinking water supply system pipe from a composition comprising: a) a polyolefin (A); b) a compound (B) which is Bis (2,4-dicumylphenyl)pentaerythritol-di-phosphite; c) a phenolic compound (C), having the formula (II) wherein R is an non-substituted or substituted aliphatic or aromatic hydrocarbyl radical which may comprise heteroatoms, or R is an heteroatom; X 1 to X 5 each is H, OH, and/or R′, wherein at least one of which is OH; wherein R′ is a hydrocarbyl radical or hydrogen, and n is 1 to 4; and d) optionally, an UV-light stabilizer (D), wherein for the composition a total amount of migrated compounds (B), (C) and, if present, (D), as well as their decomposition products is equal to or less than 1.8 microgram per liter with a ratio S/V dm −1 of 11.70 to 12.30.