IP Library › Granted Patent US 12,331,224
Granted Patent B2
US 12,331,224 · App. 17/778,639 · Granted Jun 17, 2025

Two-part epoxy compositions for adherent coatings of storage articles

Inventor: Matthew H. Striewing (Cleveland, OH)
Assignee: SWIMC LLC
C09J163/10C09J7/10C09J2301/312
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Quick Facts
Patent No.
US 12,331,224
App. No.
17/778,639
Granted
Jun 17, 2025
Kind
B2
Abstract

A two-part epoxy coating composition for producing an adherent coating for articles such as large liquid storage tanks. The two-part epoxy coating composition includes a first liquid comprising a polyepoxide having a described formula and having an estrogenic agonist activity less than that of bisphenol S, and a second liquid comprising a curing agent configured to react with the polyepoxide under ambient conditions.

Claims (15)

1. A two-part epoxy composition comprising:

a first liquid comprising a polyepoxide of Formula (I):

wherein the polyepoxide of Formula (I) comprises tetramethyl bisphenol F diglycidyl ether;

wherein the polyepoxide of Formula (I) has an estrogenic agonist activity less than that of bisphenol S;

wherein the polyepoxide of Formula (I) has a viscosity of about 5,000 poise to about 15,000 poise at 25° C.; and

a second liquid comprising a curing agent configured to react with the polyepoxide under 25° C.;

wherein the curing agent comprises triethylenetetramine (TETA).

2. The two-part epoxy composition of claim 1 , wherein the ether oxygen atom of each phenylene group depicted in Formula (I) is located at a para position relative to: (i) R 2 or (ii) a ring-ring covalent linkage if n is 0 and R 2 is absent.

3. The two-part epoxy composition of claim 1 , wherein n is 1.

4. The two-part epoxy composition of claim 3 , wherein R 2 is a methylene group.

5. The two-part epoxy composition of claim 3 , wherein R 3 is a methylene group.

6. The two-part epoxy composition of claim 1 , wherein the two-part epoxy composition is substantially free of mobile bisphenol A and a diglycidyl ether of bisphenol A.

7. The two-part epoxy composition of claim 1 , wherein the two-part epoxy composition is substantially free of mobile polyhydric phenols, and epoxides thereof, having an estrogenic agonist activity equal to or greater than bisphenol S.

8. The two-part epoxy composition of claim 1 , wherein the polyepoxide of Formula (I) has an atomic weight of less than 600 Daltons.

9. The two-part epoxy composition of claim 1 , wherein the polyepoxide of Formula (I) constitutes at least 50% by weight of the two-part epoxy composition.

Continuity (2)
Provisional Application 62938541 · Nov 21, 2019
Related Publication 20220411679A1 · Dec 29, 2022
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