Two-component epoxy resin paint

Patent metadata

Field	Value
Publication number	US-10844239-B2
Application number	US-201716094415-A
Country	US
Kind code	B2
Filing date	Apr 17, 2017
Priority date	Apr 19, 2016
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

Abstract

The present disclosure is directed to a two-component epoxy resin paint, comprising a) an epoxy resin component; and b) an amine component for curing the epoxy resin component, the amine component comprising: i) at least one polyamide curing agent; and ii) at least one Mannich base curing agent, wherein at least one of the polyamide curing agent and the Mannich base curing agent is derived from one or more multifunctional amines comprising at least one cycloaliphatic multifunctional amine, and wherein the cycloaliphatic multifunctional amine is present in an amount of 30 wt % or more relative to the total amount of the multifunctional amines, wherein the ratio by weight of the epoxy resin component a) to the amine component b) is in the range of 100:8 to 100:20.

First claim

What is claimed:

1. A two-component epoxy resin paint, comprising:
a) an epoxy resin component; and
b) an amine component for curing the epoxy resin component, the amine component comprising:
i) at least one polyamide curing agent; and
ii) at least one Mannich base curing agent,
wherein each of the polyamide curing agent and the Mannich base curing agent is derived from one or more multifunctional amines comprising at least one cycloaliphatic multifunctional amine, and
wherein the cycloaliphatic multifunctional amine is present in an amount of 30 wt % or more relative to the total amount of the multifunctional amines, and wherein the ratio by weight of the epoxy resin component a) to the amine component b) is 100:8 to 100:20.

2. The two-component epoxy resin paint according to claim 1 , wherein the cycloaliphatic multifunctional amine is present in an amount of 40 wt % or more relative to the total amount of the multifunctional amine.

3. The two-component epoxy resin paint according to claim 1 , wherein the cycloaliphatic multifunctional amine comprises a multifunctional amine containing at least one cyclohexyl, cycloheptyl, cyclopentyl or the combination thereof.

4. The two-component epoxy resin paint according to claim 1 , wherein the weight ratio of the Mannich base curing agent to the polyamide curing agent is 10:90 to 90:10.

5. The two-component epoxy resin paint according to claim 1 , wherein the polyamide curing agent has an amine value of 100 mg KOH/g curing agent or more, and comprises 1 wt % or more of ethylenically unsaturated functional groups relative to the total weight of the polyamide curing agent.

6. The two-component epoxy resin paint according to claim 5 , wherein the polyamide curing agent has a viscosity of 2000 mPa·s or more at 25° C.

7. The two-component epoxy resin paint according to claim 1 , wherein the Mannich base curing agent has an amine value of 150 mg KOH/g curing agent or more, and comprises 1 wt % or more of phenolic hydroxy groups relative to the total weight of the Mannich base curing agent.

8. The two-component epoxy resin paint according to claim 7 , wherein the Mannich base curing agent has a viscosity of 2000 mPa·s or more at 25° C.

9. The two-component epoxy resin paint according to claim 1 , wherein the amine component further comprises a curing accelerator chosen from a tertiary amine containing group and a phenolic hydroxyl group.

10. The two-component epoxy resin paint according to claim 1 , wherein the epoxy resin component comprises, relative to the total weight of the epoxy resin component,
10 to 85 wt % of an epoxy resin;
1 to 20 wt % of a liquid petroleum resin,
5 to 70 wt % of a filler package; and
0 to 15 wt % of additional additives comprising wetting and dispersing agents, defoamers, thickeners, flatting agents, solvents, pigments, or any combination thereof.

11. The two-component epoxy resin paint according to claim 10 , wherein the epoxy resin has an epoxy value of 0.1 equivalent/100 g epoxy resin or more, the epoxy value being defined as the molar amount of epoxy functional group contained in 100 g of the epoxy resin.

12. The two-component epoxy resin paint according to claim 10 , wherein the epoxy resin has a viscosity of 10,000 mPa·s or less at 25° C.

13. The two-component epoxy resin paint according to claim 10 , wherein the epoxy resin comprises a diglycidyl ether of polyhydric phenol, a diglycidyl ether of polyalcohol, or a polyglycidyl ether of a novolac resin, or combinations thereof.

14. The two-component epoxy resin paint according to claim 13 , wherein the epoxy resin is the diglycidyl ether of the polyhydric phenol of formula (I):

wherein
D each independently represents —S—, —S—S—, —SO—, —SO 2 —, —CO 2 —, —CO—, —O—, or C 1 to C 10 alkylene,
Y each independently represents halogen or optionally substituted monovalent C 1 to C 10 hydrocarbon group,
m each independently represents 0, 1, 2, 3 or 4, and

n represents an integer from 0 to 4.

15. The two-component epoxy resin paint according to claim 10 , wherein the liquid petroleum resin has a molecular weight of 2000 g/mol or less.

16. The two-component epoxy resin paint according to claim 10 , wherein the filler package comprises, relative to the total weight of the filler package,
1 to 5 wt % of one or more rust inhibitors;
5 to 40 wt % of one or more silicate salts;
10 to 40 wt % of one or more sulfate salts;
0 to 25 wt % of one or more carbonate salts; and
0 to 20 wt % of one or more silicon dioxides.

17. The two-component epoxy resin paint according to claim 1 , wherein the paint is a primer, a topcoat, an intermediate coat, or a DTM coating.

Assignees

• Sherwin Williams Co
• Valspar Sourcing Inc

Inventors

• Xu Wanjun
• Yang Fan
• Pei Daqian

Classifications

• C09D7/45

  Anti-settling agents · CPC title

• C09D5/002

  Priming paints (C09D5/08 takes precedence) · CPC title

• C08L77/08

  from polyamines and polymerised unsaturated fatty acids · CPC title

• C08G69/34

  using polymerised unsaturated fatty acids · CPC title

• C08G69/265

  from at least two different diamines or at least two different dicarboxylic acids · CPC title