Aqueous polyurethane resin composition and one-component...

Details Aqueous polyurethane resin composition and one-component... Aqueous polyurethane resin composition and one-component...

2011-03-08

2011-03-08

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...

C428S423100, C524S839000, C524S840000

Reexamination Certificate

active

07902291

ABSTRACT:
An aqueous polyurethane resin composition obtained by:obtaining a neutralized prepolymer having a terminal isocyanate group by reacting a polyisocyanate (A) and a polyfunctional compound (B) containing a polyester polyol (B1) having an acidic group and at least one member selected from the group consisting of other polyols (B2) and chain extenders (B3) so as to satisfy a condition expressed by the following mathematical formula (1); andsubjecting the neutralized prepolymer having a terminal isocyanate group to a chain elongation reaction with the use of a polyamine (C) containing at least two groups selected from the group consisting of an amino group and an imino group and water (D) so as to satisfy conditions expressed by the following mathematical formulas (2) and (3) to obtain a elongated product, and then dispersing the elongated product into water:in-line-formulae description="In-line Formulae" end="lead"?100/80≦a/b≦100/40   (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?100/98≦a/(b+c)≦100/80   (2)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?100/105≦a/(b+c+2d)≦100/95   (3)in-line-formulae description="In-line Formulae" end="tail"?(in formulas (1) to (3), a represents the number of isocyanate groups (NCO) contained in the polyisocyanate (A), b represents the number of hydroxyl groups (OH) contained in the polyfunctional compound (B), c represents the number of the groups selected from the group consisting of an amino group (NH2) and an imino group (NH) contained in the polyamine (C), and d represents the number of moles of the water (D)).

REFERENCES:
patent: 2002/0111424 (2002-08-01), Takanashi et al.
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Machine English translation of JP 11-349914.

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