Patent ID: 9376548
Filing Date: 2016-06-28
CPC Classification: C08K,Y10T

Claim Text:
1. A method for increasing the resistance of a polyolefin composition comprising a polyolefin base resin against degradation caused by contact with ClO 2 -containing water, by adding to said polyolefin composition 100 ppm to 1000 ppm of one or more antioxidant selected from the group consisting of: a) phenols according to formula I: wherein R is a non-substituted or substituted aliphatic or aromatic hydrocarbyl radical which may comprise heteroatoms or R is a heteroatom, R′ and R″ independently are a non-substituted or substituted hydrocarbyl radical which may comprise heteroatoms or H, X n is 1 to 4, and at least one of the substituents R, R′ and/or R″ of the phenol comprises at least one sulphur, phosphorus and/or nitrogen heteroatom(s), b) amine compounds according to formula II: wherein R c) sulphur-containing compounds according to formula III: wherein R a and R b independently are an aliphatic or aromatic hydrocarbyl radical, optionally comprising heteroatoms, and contacting said polyolefin composition with ClO wherein said polyolefin composition has a lifetime of at least 200 h in a test measuring the resistance against ClO