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Technical Data Sheet

 

Re-issued September 2005

 

 

EPON™ Resin 8161

 

 

Product Description

EPON™ Resin 8161 is a moderate viscosity resin containing both epoxide and reactive unsaturation functionality. Reactivity of this resin with aliphatic and cycloaliphatic amine curing agents closely parallels that of unmodified liquid bisphenol A/ephichlorohydrin epoxy resins. This unique feature allows the substitution of EPON 8161 for the basic epoxy in many systems without adversely affecting cure rates

 

Application Areas/Suggested Uses

  • Floor topping and repair compounds
  • General purpose adhesives
  • Laminating binders
  • Casting and encapsulation compounds
  • Solventless or high solids/low VOC coatings
 

 

Benefits

  • Excellent substrate wetting
  • Light color
  • Low vapor pressure
  • High reactivity and good cured property profile with specific amine types

 

Sales Specification

Property

Units

Value

Test Method/Standard

Weight per Epoxide

g/eq

200 – 214

ASTM D1652

Viscosity at 25°C

cP

1,800 – 2,400

ASTM D2196

Color

Gardner

1 max.

ASTM D1544

 

 

 

 

 

Typical Properties

Property

Units

Value

Test Method/Standard

Density at 25°C

lb/gal

9.56

ASTM D1475

Combining Equivalent Weight

g/eq

177

 

 

 

 

 

 

 

Processing/How to use

 

General Information

Although conventional epoxy functional diluents are widely employed to control viscosity, their use often results in compromises in reactivity, combining ratios, or cured state physical strength and chemical resistance properties. EPON 8161 provides a lower application viscosity with a minimum of variation in these important properties when crosslinked with appropriate converters. EPON 8161 was developed for use with aliphatic and cycloaliphatic polyamine curing agents, examples of which are EPIKURE™ 3295, 3072, 3271, 3370 Curing Agents and triethylenetetramine. Curing will occur at ambient room temperatures or may be accelerated by application of moderately elevated temperatures in the usual manner associated with conventional liquid epoxy systems. The cure response of EPON 8161 to both unmodified and accelerated aliphatic polyamines is generally equivalent to that of undiluted EPON 828, but is more sluggish with amidoamine types. Cure progression of the amidoamine system can be accelerated through addition of small levels of a catalyzed converter such as EPIKURE 3271.

 

Curing agents other than polyamines may be utilized with EPON 8161, but evaluation should be conducted on an individual basis for effects on reactivity and matrix properties since the response of this product may vary from more conventional systems.

 

Since EPON 8161 contains both reactive unsaturation and epoxide groups, a combining equivalent weight different from weight per epoxide must be observed when calculating proper stoichiometry. In most applications, optimum cured state properties will be achieved at a ratio of one amine hydrogen per equivalent weight rather than epoxide equivalent

 

 

Performance Properties

Data illustrating the properties of EPON 8161 cured with several selected polyamine curing agents are listed in Table 1. As previously noted, direct comparisons of these properties with those developed by counterpart systems based on undiluted bisphenol A epoxy resins (e.g., EPON 828) reveal that benefits of reduced viscosity with minimal sacrifice in most mechanical and chemical resistance performance can be achieved by proper formulation of EPON 8161.

 

Table 1 / EPON Resin 8161 cured with amine curing agents

 

Method

Units

A

B

C

D

EPON Resin 8161

 

pbw

100

100

100

100

EPIKURE™ Curing Agent 3295

 

pbw

25

---

---

---

EPIKURE Curing Agent 3271

 

pbw

---

18

---

---

EPIKURE Curing Agent 3072

 

pbw

---

---

37

---

EPIKURE Curing Agent 3370

 

pbw

---

---

---

40

 

 

 

 

 

 

 

Handling Properties @ 25°C

 

 

 

 

 

 

Viscosity

 

cP

1,260

880

1,280

1,780

Gel Time, 100 gram mass

 

minutes

15

7

40

23

Peak Exotherm, 100 gram mass

 

°C

199

159

133

---

 

 

 

 

 

 

 

Cure Schedule

 

wks/°C

1/25

1/25

1/25

1/25

 

 

 

 

 

 

 

Cured State Properties 1

 

 

 

 

 

 

Heat Deflection Temperature

ASTM D648

°C

65

69

68

59

Tensile Strength

ASTM D638

psi

9,900

9,700

7,400

7,600

Tensile Elongation at break

 

%

4.0

2.2

2.2

2.5

Flexural Strength

ASTM D790

psi

15,400

16,800

13,200

---

Flexural Modulus, initial

 

ksi

470

490

390

---

Compressive Strength, ultimate

 

psi

22,300

30,200

16,300

---

Compressive Strength, yield

 

psi

13,800

14,100

16,300

---

Izod Impact, notched

ASTM D256

ft.•lb./in.

0.49

0.56

0.33

0.49

Hardness

Shore D

 

87

87

85

82

 

 

 

 

 

 

 

Chemical Resistance 2

 

 

 

 

 

 

Water

 

 

 

 

 

 

24 hrs

 

%

0.16

0.16

0.21

0.16

1 week

 

%

0.45

0.48

0.6

0.38

5% acetic acid

 

 

 

 

 

 

24 hrs

 

%

1.70

1.30

1.32

0.19

 

 

 

 

 

 

 

1 Determined on 1/8” thick specimens at 23 °C following a one week cure at 25 °C.

2 Percent weight gain of 3” x 1” x 0.125” specimens.

 

 

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.

 

EPON Resin 8161 should be stored in tightly sealed glass, stainless steel, or phenolic-lined containers at normal room temperature. Storage in unlined steel containers should be avoided. Care should be taken to avoid storage above 50 °C. As with most epoxy resins, prolonged storage may result in some crystallization of the pure bisphenol A diglycidyl ether component. Potential for crystallization of EPON 8161 is greatly increased when storage temperatures fall below 0 °C. Should crystallization occur, it may be converted to liquid by opening the drum bung and gently warming to temperatures not to exceed 50 °C (122 °F)

 

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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