The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 10, 2002
Filed:
Oct. 11, 2001
Kotaro Oshima, Inba-gun, JP;
Tohru Matsuoka, Yokohama, JP;
Yozo Nagai, Tokyo, JP;
Mitsuo Nakamura, Inba-gun, JP;
Other;
Abstract
A colored resin composition for water pipes which comprises (A) a polyethylene resin and (B) specific amounts of (i) a cobalt blue pigment, (ii) at least one selected from phthalocyanine pigments having no metals and metal phthalocyanine pigments having no chlorine atoms or one chlorine atom in a molecule, (iii) a dioxazine pigment and (iv) a titanium dioxide pigment and a colored water pipe which comprises the colored polyethylene resin composition and has a color tone within a specific color solid expressed by the values of the Munsell standard color table before and after the test of resistance to chlorine water for 500 hours. The composition and the water pipe are colored in a bluish color and exhibits an excellent hiding property, excellent fastness of the color tone of the coloring component to water containing chlorine and an excellent property for preventing formation of blisters in water containing chlorine.