US 2006/0235138 A1 · Method of preparing self-emulsified urethane aqueous dispersion and method of preparing core-shell emulsion resin composition using the same

Abstract

In order to prepare an alkaline expansive core-shell emulsion resin composition applicable to an aqueous base coat paint composition for an automobile using a urethane aqueous dispersion as an emulsifying agent, first, anionic urethane aqueous dispersion having an acid value of about 50-150 mgKOH/g is prepared. Then, an alkaline expansive core-shell emulsion resin is prepared by using the urethane aqueous dispersion as an emulsifying agent. Flowing or stain after coating may be prevented when using a paint composition prepared by using thus prepared emulsion resin. Water-resistance of a coating layer and alignment of metallic particles are improved.

Claims16

Dependent claims

A method of preparing a self-emulsified urethane aqueous dispersion for a core-shell emulsion resin composition comprising:

preparing a pre-polymer including an isocyanate functional group at a terminal portion of the pre-polymer by reacting a di-fuctional isocyanate compound with polycarbonate polyol having a molecular weight of about 1000 to about 2000 and a compound having at least two hydroxyl functional groups and one carboxyl functional group;
and
dispersing the pre-polymer into an aqueous solution of a tertiary amine and then extending chain of the pre-polymer using one of a primary amine and a secondary amine.

Dependencies are inferred from the claim text.

Facts

Application

11/222,842Filed 12 Sep 2005

Priority

KR 10-2005-003248819 Apr 2005

Published

19 Oct 2006

Term ends

Not estimatedThe source records don’t support an estimate.

Classification12 codes

C08L 51/08
Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds ;…:…
C08F 283/006
Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G: on to polymers provided for in C08G18/00
C08F 285/00
Macromolecular compounds obtained by polymerising monomers on to preformed graft polymers
C08G 18/12
Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step: using…

Method of preparing self-emulsified urethane aqueous dispersion and method of preparing core-shell emulsion resin composition using the same

Life of this patent

Method of preparing self-emulsified urethane aqueous dispersion and method of preparing core-shell emulsion resin composition using the same

Life of this patent

Abstract

Claims16