Oxazolidone ring containing adducts

Patent metadata

Field	Value
Publication number	US-9481757-B2
Application number	US-201414538281-A
Country	US
Kind code	B2
Filing date	Nov 11, 2014
Priority date	Dec 22, 2009
Publication date	Nov 1, 2016
Grant date	Nov 1, 2016

Abstract

Embodiments include oxazolidone ring containing adducts obtainable by combining an aliphatic epoxy compound, an aromatic epoxy compound, and a diisocyanate. Embodiments further include a curable powder coating composition including a resin component and a hardener component, where the resin component includes the oxazolidone ring containing adduct.

First claim

What is claimed:

1. A curable powder coating composition comprising a resin component and a hardener component, where the hardener component is selected from the group consisting of amines, anhydrides, carboxyl-functional polyesters, and combinations thereof, where the resin component includes an oxazolidone ring containing adduct formed by a method, comprising:
reacting an aliphatic epoxy compound, a first diisocyanate and a catalyst to form a first adduct, wherein the aliphatic epoxy compound is a polyglycidyl ether of aliphatic polyols or alkylene-oxide adducts thereof; and
reacting a second diisocyanate with a mixture of the first adduct and an aromatic epoxy compound to form the oxazolidone ring containing adduct, wherein where the aliphatic epoxy compound is 20 weight percent (wt %) to 60 wt % of a total weight of the oxazolidone ring containing adduct, the aromatic epoxy compound is 20 wt % to 40 wt % of the total weight of the oxazolidone ring containing adduct, and the first and second diisocyanate are 10 wt % to 40 wt % of the total weight of the oxazolidone ring containing adduct such that the aliphatic epoxy compound, the aromatic epoxy compound, and the diisocyanate weight percents sum to 100 wt % of the oxazolidone ring containing adduct.

2. The curable powder coating composition of claim 1 , where the oxazolidone ring containing adduct has an epoxide equivalent weight of 800 grams/equivalent (g/eq) to 1300 g/eq, a melt viscosity at 150 degrees Celcius (° C.) of 2 pascal second (Pa·s) to 10 Pa·s, a softening point of 80° C. to 100 ° C. and a glass transition temperature of 35° C. to 55° C.

3. The curable powder coating composition of claim 1 , where the aliphatic epoxy compound is selected from the group consisting of a diglycidyl ether of polypropylene glycol, 1,4-butanediol diglycidyl ether, 1,6-hexanediol diglycidyl ether, and combinations thereof; the aromatic epoxy compound is selected from the group consisting of a glycidyl ether of bisphenol A, a glycidyl ether of bisphenol F, and combinations thereof; and the first and second diisocyanates are each selected from the group consisting of 4,4′-diphenylmethane diisocyanate, toluene diisocyanate, isophorone diisocyanate, 4,4′-methylenebis(cyclohexylisocyanate), and combinations thereof.

Assignees

• Blue Cube Ip Llc

Inventors

• Gan Joseph
• Trottier Emile C

Classifications

• C09D175/00

  Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers · CPC title

• C09D163/00

  Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins · CPC title

• C08L63/00

  Compositions of epoxy resins; Compositions of derivatives of epoxy resins · CPC title

• C08G59/50

  Amines · CPC title

• C08L2666/04

  Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof · CPC title