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Technical Data Sheet

 

Re-issued August 2001

 

 

EPIKURE™ Curing Agent 3274

 

 

Product Description

EPIKURE™ Curing Agent 3274, a moderately reactive, low viscosity aliphatic amine, is water insensitive and resists “blushing” “bloom’’ and “sweat-out” in epoxy compositions cured in high humidity environments. Other features are light color, improved color retention as compared to conventional amine cured epoxy systems, and long pot life.

 

Application Areas/Suggested Uses

  • Glaze and sealer high-build coatings for decorative flooring
  • Laminating binders
  • Adhesive and encapsulating compounds
  • Miscellaneous casting applications
 

 

Benefits

  • Low color
  • Blush free
  • Sweat free 

 

Sales Specification

Property

Units

Value

Test Method/Standard

Amine as KOH

mg/g

305 – 325

ASTM D2896

Viscosity at 25°C

cP

40 – 60

ASTM D2196

Color

Gardner

1 max.

ASTM D1544

 

 

 

 

 

Typical Properties

Property

Units

Value

Test Method/Standard

Equivalent weight, approx.

 

76

 

Pounds/gallon @ 25 °C

lbs/gal

7.93

ASTM D1475

Flash Point

°F

>200

Setaflash

 

 

 

 

 

General Information

Possessing excellent compatibility with liquid epoxy resins, EPIKURE Curing Agent 3274 does not require an induction period to produce cured glossy surfaces even under adverse humidity conditions. Due to the great difference in viscosities between this curing agent and most liquid epoxy resins, thorough blending may take longer than usual to achieve. A mixing period of 2 or 3 minutes is usually adequate to ensure a homogeneous solution of resin and curing agent. Flow control agents such as urea-formaldehyde resin, colloidal silica, SR-82 silicone resin1, Modaflow flow control agent2 or various thixotropes should be incorporated into high-build coatings to ensure good film continuity.

 

Cure rate is proportional to temperature and application thickness. For 5 mil films of EPON™ Resin 828/ EPIKURE 3274 systems, tack-free cure is obtained in approximately 12 hours at 25 °C. Incorporation of flexibilizers such as HELOXY™ Modifiers 32 and 505 or monoepoxide diluents generally extend the working life and lengthen the cure period required. If increased reactivity is desired. EPIKURE Curing Agents 3270 or 3271 may be blended with EPIKURE 3274.

 

Performance Properties

 

In combination with unmodified EPON Resin 828 at ratios of 36 to 42 parts per 100 parts resin, EPIKURE Curing Agent 3274 imparts strong, rigid cured state properties. Relatively little flexibilizer or monoepoxide diluent modification (generally less than 20 percent) is required to develop high extensibility and excellent impact resistance. The handling characteristics and cured state properties of the several compositions presented in Table 1 illustrate the versatility of EPIKURE Curing Agent 3274 systems.

 

Table 1 / Properties of Systems Cured with EPIKURE Curing Agent 3274

 

 

Method

Units

A

B

C

D

E

F

EPON™ Resin 828

 

pbw

100

90

80

75

85

90

HELOXY™ Modifier 32

 

pbw

---

10

20

---

---

---

HELOXY Modifier 505

 

pbw

---

---

---

25

---

---

HELOXY Modifier 44

 

pbw

---

---

---

---

15

---

HELOXY Modifier 8

 

pbw

---

---

---

---

---

10

EPIKURE Curing Agent 3274

 

pbw

40

37

35

33

41

38

 

 

 

 

 

 

 

 

 

Handling Properties @ 25°C

 

 

 

 

 

 

 

 

Viscosity

 

cP

1,210

840

600

710

840

530

Gel Time, 100 gram mass

 

minutes

135

210

315

230

150

225

 

 

 

 

 

 

 

 

 

Cure Schedule

 

wk/°C

2/25

2/25

2/25

2/25

2/25

2/25

 

 

 

 

 

 

 

 

 

Cured State Properties 1

 

 

 

 

 

 

 

 

Tensile Strength

ASTM D638

psi

9,200

5,500

1,900

2,000

8,800

4,100

Tensile Elongation at break

 

%

4

24

102

77

8

80

Izod impact, notched

ASTM D256

ft.•lb./in.

0.53

0.92

12.50

3.50

0.52

0.95

Hardness

 

Shore D

83

78

56

65

80

78

 

 

 

 

 

 

 

 

 

Chemical Resistance 2

 

 

 

 

 

 

 

 

Distilled Water

 

%

0.21

0.28

0.44

0.38

0.25

0.25

5% Acetic Acid

 

%

0.25

1.1

2.8

1.7

1.3

0.78

50% Xylene/50% Isopropanol

 

%

8

14

35

22

9

20

 

 

 

 

 

 

 

 

 

1 Determined on 1/8” thick castings at 25 °C. Systems were cured for 2 weeks at 25 °C.

2 Percent weight gain after immersion for 24 hours at 25 °C.

 

 

Safety, Storage & Handling

Please refer to the MSDS for the most current Safety and Handling information.

 

Please refer to the Hexion web site for Shelf Life and recommended Storage information.

 

To preserve product quality and prevent discoloration, it is recommended that a nitrogen blanket be maintained on the headspace of an opened container and that storage / handling temperatures in excess of 50°C (122°F) be avoided. Spillage around the opening of the container from dispensing operations will form a crystalline residue. This residue is not soluble in the curing agent nor the resin, and certain measures should be taken to prevent it from contaminating the remaining contents of the container. The crystalline residue should be removed with a warm damp wash cloth PRIOR to re-opening the container for dispensing.

 

EPIKURE Curing Agent 3274 should be stored in tightly sealed, completely filled containers of metal, glass, or polyolefin plastic at normal room temperatures. The curing agent may darken during long-term storage, the extent of color formation depending on storage temperature and degree of exposure to air.

 

Exposure to these materials should be minimized and avoided, if feasible, through the observance of proper precautions, use of appropriate engineering controls and proper personal protective clothing and equipment, and adherence to proper handling procedures. None of these materials should be used, stored, or transported until the handling precautions and recommendations as stated in the Material Safety Data Sheet (MSDS) for these and all other products being used are understood by all persons who will work with them. Questions and requests for information on Hexion Inc. ("Hexion") products should be directed to your Hexion sales representative, or the nearest Hexion sales office. Information and MSDSs on non-Hexion products should be obtained from the respective manufacturer.

Packaging

Available in bulk and drum quantities.

 

 

Contact Information

For product prices, availability, or order placement, please contact customer service:

www.hexion.com/Contacts/

 

For literature and technical assistance, visit our website at: www.hexion.com

® and ™ Licensed trademarks of Hexion Inc.

DISCLAIMER

The information provided herein was believed by Hexion Inc. (“Hexion”) to be accurate at the time of preparation or prepared from sources believed to be reliable, but it is the responsibility of the user to investigate and understand other pertinent sources of information, to comply with all laws and procedures applicable to the safe handling and use of the product and to determine the suitability of the product for its intended use. All products supplied by Hexion are subject to Hexion’s terms and conditions of sale. HEXION MAKES NO WARRANTY, EXPRESS OR IMPLIED, CONCERNING THE PRODUCT OR THE MERCHANTABILITY OR FITNESS THEREOF FOR ANY PURPOSE OR CONCERNING THE ACCURACY OF ANY INFORMATION PROVIDED BY HEXION, except that the product shall conform to Hexion’s specifications. Nothing contained herein constitutes an offer for the sale of any product.

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