Aqueous modified polyisocyanate, non-yellowing coating...

Details Aqueous modified polyisocyanate, non-yellowing coating... Aqueous modified polyisocyanate, non-yellowing coating...

2011-03-15

2011-03-15

Niland, Patrick D (Department: 1762)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C524S590000, C524S591000, C524S839000, C524S840000

Reexamination Certificate

active

07906579

ABSTRACT:
A aqueous modified polyisocyanate intended to be dispersed in an aqueous medium for use and obtained by reacting an HDI derivative with (A) a modifying agent composed of a methoxy polyoxyalkylene glycol mainly comprising an ethylene oxide unit, (B) a modifying agent composed of a hydroxyl group-terminated polyoxyalkylene glycol produced by using an alcohol having 8 or more carbon atoms as an initiator and mainly comprising a propylene oxide unit, and (C) a modifying agent composed of an ester compound having at least one hydroxyl group with an alkali metal salt of sulfonic acid introduced therein, wherein the concentration (calculated value) of the alkali metal salt of sulfonic acid derived from the modifying agent (C) is 1.5 to 25 μmol/g.The aqueous modified polyisocyanate is not only excellent in dispersion stability in water but also excellent in stability of the isocyanate group in water even under temperature conditions of 35 ° C. or higher.

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Machine English translation of JP 2003-089713.
English-language International Preliminary Report on Patentability and Written Opinion of the International Searching Authority, dated Dec. 24, 2008 for International Application PCT/JP2007/05803 filed Apr. 17, 2007; Applicants: Nippon Polyurethane Industry Co, Ltd.

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