Nitrofunctional polyurethane dispersions for binder compositions
AssigneeAngus Chemical Company
InventorsPatrick E. Brutto, George D. Green, Zhenwen Fu, Eric C. Greyson, Andrew Hejl, Jia Tang
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Abstract
Provided is a binder composition and its use in aqueous based paints and coatings and other applications. The binder composition comprises: a polyurethane dispersion containing water and a polyurethane polymer, wherein the polyurethane polymer is prepared by reacting a nitroalcohol compound, a polyol compound, a polyisocyanate compound, and optionally chain extenders, wherein the nitroalcohol compound is of formula I, wherein R, R1, and Z are as defined herein.
Claims22
An aqueous based paint or coating composition comprising:
- (a) a grind phase;
- and
- (b) a letdown phase comprising a binder, wherein the binder consists of:
- a polyurethane dispersion containing water and a polyurethane polymer, wherein the polyurethane polymer comprises polymerized monomers of a nitroalcohol compound, a polyol compound, a polyisocyanate compound, and optionally a chain extender,
- wherein:
- the nitroalcohol is a compound of formula I:
- wherein R is CH3, CH3CH2, or a group of formula R1—Z—H,
- R1 at each occurrence is independently —(CH2)x—, —CH(CH3)—, or —CH(CH2CH3)—,
- wherein x is 1-3, and
- Z at each occurrence is O;
- and
- the polyisocyanate compound is selected from the group consisting of 4,4′-diisocyanato dicyclohexylmethane (H12MDI), isophorone diisocyanate (IPDI), 1,3/1,4-diisocyanatomethyl cyclohexane, and hexamethylene diisocyanate,
- wherein the aqueous based paint or coating is air cured.
An aqueous based paint or coating composition comprising:
- (a) a grind phase;
- and
- (b) a letdown phase comprising a binder, wherein the binder consists of:
- a polyurethane dispersion containing water and a polyurethane polymer, wherein the polyurethane polymer comprises polymerized monomers of a nitroalcohol compound, a polyol compound, a polyisocyanate compound, and optionally chain extenders,
- wherein:
- the nitroalcohol is a compound of formula I:
- wherein R is CH3, CH3CH2, or a group of formula R1—Z—H,
- R1 at each occurrence is independently —(CH2)x—, —CH(CH3)—, or —CH(CH2CH3)—,
- wherein x is 1-3, and
- Z at each occurrence is O;
- and
- the polyisocyanate compound is selected from the group consisting of 4,4′-diisocyanato dicyclohexylmethane (H12MDI), isophorone diisocyanate (IPDI), 1,3/1,4-diisocyanatomethyl cyclohexane, and hexamethylene diisocyanate;
- wherein the composition when applied to an aluminum substrate and air cured for one day has a pendulum hardness of at least 30 seconds.
Dependencies are inferred from the claim text.