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US 4,091,134 AGranted
Coated metal pipe
OwnerMasaru Uemura, Hitoshi Kuroki +2inventors
InventorsMasaru Uemura, Hitoshi Kuroki, Nobuhiro Echida, Yujiro Kosaka
Life of this patent
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Abstract
A coated metal pipe which comprises a pipe coated with a composition comprising 2 to 40 wt. parts of low molecular weight oxidized polymer of polypropylene or propylene-ethylene copolymer; 5 to 40 wt. parts of a rubber component selected from a group consisting of styrene-butadiene copolymer, polyisoprene, butyl rubber, chlorosulfonic polyethylene and polyisobutylene; 5 to 50 wt. parts of a tackifier and 10 to 80 wt. parts of asphalt.
Claims13
A coated metal pipe which comprises a pipe coated with a composition consisting of:
- 2 to 40 wt. parts of a low molecular weight oxidized polymer of polypropylene or propylene-ethylene copolymer having an acid value of 1-20 as measured by the dioxane-tetralin solvent method;
- 5 to 40 wt. parts of a rubber component selected from the group consisting of styrene-butadiene copolymer, polyisoprene, butyl rubber, chlorosulfonic polyethylene and polyisobutylene;
- 5 to 50 wt. parts of a tackifier;
- and
- 10 to 80 wt. parts of asphalt to a thickness of 0.1-10 mm.
2 more elements
A coating composition, which consists of:
- 2 to 40 weight parts of a low molecular weight oxidized polymer of propylene or a propylene-ethylene copolymer having an acid value of 1-20 as measured by the dioxanetetralin solvent method;
- 5to 40 weight parts of a rubber component selected from the group consisting of styrenebutadiene copolymer, polyisoprene, butyl rubber, chlorosulfonic polyethylene and polyisobutylene;
- 5 to 50 weight parts of a tackifier;
- and
- 10 to 80 weight parts of asphalt.
2 more elements
Dependencies are inferred from the claim text.