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Technical Data Sheet

 

Re-issued August 2001

 

 

EPIKURE™ Curing Agent 3295

 

 

Product Description

EPIKURE™ Curing Agent 3295, a very low viscosity aliphatic amine adduct, is recommended for curing epoxy resins at room or moderately elevated temperatures. Its reduced vapor pressure, less critical combining ratio, superior electrical properties, and non-fuming characteristics make it safer and more convenient to handle than the aliphatic polyamines such as diethylenetriamine. EPIKURE 3295 is ideally suited for many casting, laminating, and impregnation operations and certain coating applications. It can be diluted with water and is useful as a curing agent for aqueous resin systems.

 

Application Areas/Suggested Uses

  • Brush head potting compounds
  • Laminated and cast tooling
  • High-build maintenance coatings
  • Water-dilutable adhesives
 

 

 

Sales Specification

Property

Units

Value

Test Method/Standard

Amine as KOH

mg/g

881 – 961

ASTM D2896

Viscosity at 25°C

cP

125 – 205

ASTM D2196

Color

Gardner

3 max.

ASTM D1544

 

 

 

 

 

Typical Properties

Property

Units

Value

Test Method/Standard

Equivalent weight, approx.

 

45

 

Pounds/gallon @ 25 °C

lbs/gal

8.28

ASTM D1475

Flash Point

°F

>200

Setaflash

 

 

 

 

 

 

General Information

EPIKURE Curing Agent 3295 is relatively reactive and imparts a high degree of rigidity and mechanical strength to cured systems. The pot life, exothermic temperature rise and curing time of compositions containing EPIKURE Curing Agent 3295 depend on batch size, filler type, filler loading, and temperature. For example, a 1-pound batch of a mixture containing EPON™ Resin 828 and EPIKURE Curing Agent 3295 blended at room temperature has a pot life of less than 20 minutes and develops a maximum temperature above 200 °C (392 °F).

 

Unfilled compositions based on EPON 828 and EPIKURE 3295, in thin sections where exothermic heat is readily dissipated, require 6 to 12 hours at room temperature to gel and develop handling strength; full strength is reached after several days. Although castings as thick as 1 inch can be prepared under carefully controlled conditions, the maximum thickness recommended for the unfilled composition is about 1/2 inch. At this thickness the composition’s exotherm temperature rises to 120 °C when cast at room temperature, and handling strength develops in about 30 minutes.

 

While thin sections can be cured rapidly at moderately elevated temperatures, thicker sections should be allowed to gel at room temperature before curing at elevated temperatures. A cure at room temperature requires several days, but the properties, as shown in Table 1, are improved with a post cure of 2 hours at 100 °C. For castings thicker than 1/2 inch, a mixture of EPIKURE Curing Agent 3295 and EPIKURE Curing Agent 3046 should be used. Addition of an inert filler to the composition reduces the exothermic temperature rise of the system making possible the preparation of larger castings.

 

For low viscosity applications, EPIKURE Curing Agent 3295 can be used with reactive diluents or diluent-containing blends such as EPON Resin 815 and EPON Resin 813. Of the low viscosity, reactive diluent-containing systems, EPON 813 provides the best strength properties while EPON 815 imparts higher impact strength. Flexibility can be imparted to systems cured with EPIKURE 3295 by including in the epoxy resin portion a flexibilizing epoxy resin such as HELOXY™ Modifiers, 32 or 505 or EPON Resin 832. A property profile is shown in Table. 1.

 

 

Performance Properties

 

Table 1 / Properties of Systems Cured with EPIKURE Curing Agent 3295

 

 

Method

Units

A

B

C

D

E

EPON™ Resin 828

 

pbw

100

---

---

40

100

EPON Resin 815

 

pbw

---

100

---

---

---

EPON Resin 813

 

pbw

---

---

100

---

---

EPON Resin 8021

 

pbw

---

---

---

60

---

EPIKURE Curing Agent 3295

 

pbw

25

25

25

29

25

 

 

 

 

 

 

 

 

Handling Properties @ 25°C

 

 

 

 

 

 

 

Viscosity

 

cP

2,620

465

440

450

2,620

Gel Time, 100 gram mass

 

minutes

26

37

29

16

26

Peak Exotherm, 100 grams

 

°C

212

202

206

154

212

 

 

°F

414

396

403

309

414

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cure Schedule

 

hrs/°C

16/25

2/100

16/25

2/100

16/25

2/100

16/25

2/100

---

 

 

wks/°C

---

---

---

---

2/25

 

 

 

 

 

 

 

 

Cured State Properties 1

 

 

 

 

 

 

 

Heat Deflection Temperature

ASTM D648

°C

107

79

68

60

63

Tensile Strength

ASTM D638

psi

10,150

10,250

11,500

9,200

9,300

Tensile Elongation at break

 

%

4.0

6.5

3.1

4.6

2.1

Flexural Strength

ASTM D790

psi

18,200

17,150

18,800

14,000

14,900

Flexural Modulus, Initial

 

ksi

580

550

460

500

430

Izod impact, notched

ASTM D256

ft.·lb./in.

0.38

0.56

0.42

0.28

0.44

Hardness

 

Shore D

86

85

86

82

84

 

 

 

 

 

 

 

 

Chemical Resistance 2

 

 

 

 

 

 

 

Distilled Water

 

%

0.17

0.19

0.13

0.22

0.18

5% Acetic Acid

 

%

0.39

0.86

0.95

1.41

---

50% Xylene/50% Isopropanol

 

%

0.01

0.01

0.62

0.53

---

 

 

 

 

 

 

 

 

Electrical Properties

 

 

 

 

 

 

 

Dielectric constant, at 106 Hz

ASTM D150

 

4.03

3.97

3.83

4.08

---

Dissipation factor, at 106 Hz

 

 

0.032

0.027

0.019

0.029

---

Volume resistivity

 

 

 

 

 

 

 

at 25 °C

 

ohm·cm

>1016

>1016

>1016

---

---

at 66 °C

 

ohm·cm

1.8 x 1014

5.3 x 1013

7.4 x 1012

---

---

at 93 °C

 

ohm·cm

3.9 x 1012

6.6 x 1010

1.8 x 1010

---

---

at 130 °C

 

ohm·cm

4.8 x 109

>109

>109

---

---

 

 

 

 

 

 

 

 

1 Determined on 1/8” thick test specimens at 25 °C. Systems A, B, C and D were cured for 16 hours at 25 °C, followed by 2 hours at 100 °C. System E was 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.

 

 

EPIKURE Curing Agent 3295 should be stored in tightly sealed containers, in a dry location at normal room temperature.

 

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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