Coloured Pipes for Transporting Disinfectant-Containing Water
AssigneeTotal Petrochemicals Research Feluy
InventorsPierre Belloir, Christine Bertrand
Life of this patent
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Abstract
This invention relates to the use of a coloured polyethylene pipe for transporting water containing disinfectant. The pipe is prepared from a polyethylene resin, that is produced with one or more single site catalyst systems, and that comprises blue pigments and anti-UV additive.
Claims14
1-13. (canceled)
A pipe adapted for transporting water containing disinfectant, wherein the pipe is prepared from a bi- or multi-modal polyethylene resin produced either with two or more single site catalyst systems in a single reactor or with a single site catalyst system in two serially connected reactors, wherein at least one of the single site catalyst systems is metallocene catalyst system comprising a bisindenyl or a bis tetrahydroindenyl catalyst component of formula
- R″(Ind)2MQ2
- wherein Ind is a substituted or unsubstituted indenyl or tetrahydroindenyl group, R″ is a structural bridge imparting stereorigidity to the complex, M is a metal Group 4 of the Periodic Table and Q is a hydrocarbyl having from 1 to 20 carbon atom or a halogen, said polyethylene resin further comprising blue pigments and anti-UV additive.
Dependencies are inferred from the claim text.