High solids epoxy coatings

Patent metadata

Field	Value
Publication number	US-10584261-B2
Application number	US-201314651061-A
Country	US
Kind code	B2
Filing date	Dec 5, 2013
Priority date	Dec 14, 2012
Publication date	Mar 10, 2020
Grant date	Mar 10, 2020

Abstract

A coating composition including a blend of at least two or more epoxy resins, wherein at least one of the epoxy resins comprises (i) a CHDM epoxy resin having less than about 2 wt % total chlorine content; and wherein at least one of the epoxy resins comprises (ii) at least one other epoxy resin other than the epoxy resin in component (i); a curable coating composition including (a) the above blend of epoxy resins and (b) at least one amine curing agent; a thermoset coating product prepared from the above curable composition; and a process for preparing the above compositions and a coating therefrom.

First claim

The invention claimed is:

1. A curable coating composition comprising:
(a) a blend of at least two epoxy resins comprising (i) at least one 1,4-cyclohexanedimethanol (CHDM) epoxy resin having from about 0.01 to about 1.0 weight percent total chlorine content; and (ii) at least one other epoxy resin other than the epoxy resin in component (i), wherein said at least one other epoxy resin comprises a bisphenol A epoxy resin, an epoxy novolac, a bisphenol F epoxy, a dimer acid or fatty acid modified bisphenol A epoxy, or a mixture thereof;
(b) at least one amine curing agent;
wherein the at least one amine curing agent comprises an ethylene amine, a cycloaliphatic amine, a Mannich base, a phenalkamine, or mixtures thereof; and
wherein the concentration of the amine curing agent comprises an equivalent ratio of amine NH:epoxy of from about 0.5:1 to about 1.5:1; and
wherein the amount of the at least one 1,4-cyclohexanedimethanol (CHDM) epoxy resin to the amount of the at least one other epoxy resin other than the epoxy resin in component (i) is greater than 30 wt % and less than about 70 wt %, based on the total weight of the blend of the at least two epoxy resins.

2. The composition of claim 1 , wherein the at least one CHDM epoxy resin composition contains less than about 10 percent CHDM monoglycidyl ether; and less than about 30 percent oligomeric epoxy resin.

3. The composition of claim 1 , wherein the at least one CHDM epoxy resin compound comprises 1,4-cyclohexanedimethanol diglycidyl ether.

4. The composition of claim 1 , further comprising a third epoxide compound separate and different from the epoxide resin compounds of (a)(i) and (a)(ii); a filler; a reactive diluent; a flexibilizing agent; a processing aide; a toughening agent; or a mixture thereof.

5. A cured thermoset coating prepared from the composition of claim 1 .

6. A curable composition of claim 1 , wherein the total chlorine content of the at least one 1,4-cyclohexanedimethanol (CHDM) epoxy resin is from about 0.01 wt % to about 0 . 1 wt %.

7. The composition of claim 1 , wherein the amount of the at least one other epoxy resin other than the epoxy resin in component (i) is from about 40 wt % to about 70 wt %.

8. A process for preparing a coating composition comprising:
admixing at least two epoxy resins; wherein a first epoxy resin comprises (i) at least one 1,4-cyclohexanedimethanol (CHDM) epoxy resin having from about 0.01 to about 1.0 weight percent total chlorine content; and wherein a second epoxy resin comprises (ii) at least one other epoxy resin other than the epoxy resin in component (i), wherein said at least one other epoxy resin comprises a bisphenol A epoxy resin, an epoxy novolac, a bisphenol F epoxy, a dimer acid or fatty acid modified bisphenol A epoxy, or a mixture thereof, and at least one amine curing agent wherein the at least one amine curing agent comprises an ethylene amine, a cycloaliphatic amine, a Mannich base, a phenalkamine, or mixtures thereof; and
wherein the concentration of the amine curing agent comprises an equivalent ratio of amine NH:epoxy of from about 0.5:1 to about 1.5:1; wherein the amount of the at least one 1,4-cyclohexanedimethanol (CHDM) epoxy resin to the amount of the at least one other epoxy resin other than the epoxy resin in component (i) is greater than 30 wt % and less than about 70 wt %, based on the total weight of the blend of the at least two epoxy resins.

9. The process of claim 8 , wherein the at least one CHDM epoxy resin compound contains less than about 10 percent CHDM monoglycidyl ether; and less than about 30 percent oligomeric epoxy resin.

10. A curable composition of claim 8 , wherein the total chlorine content of the at least one 1,4-cyclohexanedimethanol (CHDM) epoxy resin is from about 0.01 wt % to about 0.1 wt %.

11. A process for preparing a cured coating composition comprising:
(I) providing a mixture of:
(a) a blend of at least two or more epoxy resins comprising (i) at least one 1,4-cyclohexanedimethanol (CHDM) epoxy resin having from about 0.01 to about 1.0 weight percent total chlorine content; and (ii) at least one other epoxy resin other than the epoxy resin in component (i), wherein said at least one other epoxy resin comprises a bisphenol A epoxy resin, an epoxy novolac, a bisphenol F epoxy, a dimer acid or fatty acid modified bisphenol A epoxy, or a mixture thereof; and

(b) at least one amine curing agent;
wherein the at least one amine curing agent comprises an ethylene amine, a cycloaliphatic amine, a Mannich base, a phenalkamine, or mixtures thereof; wherein the concentration of the amine curing agent comprises an equivalent ratio of amine NH:epoxy of from about 0.5:1 to about 1.5:1; wherein the amount of the at least one 1,4-cyclohexanedimethanol (CHDM) epoxy resin to the amount of the at least one other epoxy resin other than the epoxy resin in component (i)) is greater than 30 wt % and less than about 70 wt %, based on the total weight of the blend of the at least two epoxy resins; and
(II) curing the curable composition of step (I).

12. A curable composition of claim 11 , wherein the total chlorine content of the at least one 1,4-cyclohexanedimethanol (CHDM) epoxy resin is from about 0.01 wt % to about 0.1 wt %.

Assignees

• Blue Cube Ip Llc

Inventors

• Piechocki Christian
• Drumright Ray E
• Sinsoulieu Sandrine
• Vogel Erin B
• Guo Yinzhong

Classifications

• C09D163/00 Primary

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

• C08G59/226

  Mixtures of di-epoxy compounds · CPC title

• C08G59/24

  carbocyclic · CPC title