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On February 1, 2022, Hexion Holdings Corporation announced that it has completed the sale of its Coatings and Composite businesses, which includes the epoxy specialty resins and base epoxy resins and intermediates product lines, to Westlake Chemical Corporation. For epoxy coatings and composite product inquiries, please contact customer service at https://www.hexion.com/en-US/company/contact/ or Service@hexion.com.

SF 4016 Epoxy Adhesive 828 8 3061

Description

EPON™ Resin 828 / HELOXY™ Modifier 8 / EPIKURE™ Curing Agent 3061

 

 

Introduction

This bond coat formulation is designed to adhere new (freshly mixed) concrete to adjoining old concrete with a strong, permanent bond exceeding the tensile strength of concrete. Applied as a 5 to 10 mil coating to the old concrete, this bond coat also seals porous substrates and prevents rapid dehydration of the newly placed concrete. Unlike emulsion bond coats, this epoxy formulation retains high bonding strength under damp conditions existing in on-grade and below-grade structures.

 

Features

  • Convenient equal volume combining ratio
  • Long pot life (approximately 4 hours at 25 °C)
  • May be applied by brush, roller or spray
  • 10 mil coating will not sag or run on vertical surfaces

 

Formula

Material

Supplier

Pounds

Gallons

 

Part A

 

 

 

 

EPON Resin 828

Hexion

82.0

8.53

 

HELOXY Modifier 8

Hexion

18.0

2.44

 

Calcium Carbonate, No. 1 White

Thompson, Weinman & Co.

14.0

0.63

 

Kevlar Merge IF 371 Aramid Pulp

Du Pont Co.

2.0

0.08

 

 

Total A

116.0

11.68

 

 

 

 

 

 

Part B

 

 

 

 

EPIKURE Curing Agent 3061

Hexion

60.0

7.68

 

Nonylphenol

Borg-Warner Chemical, Inc.

10.0

1.25

 

CalciumCarbonate, No. 1 White

Thompson, Weinman & Co.

60.0

2.71

 

Kevlar Merge IF 371 Aramid Pulp

DuPont Co.

1.0

0.04

 

 

Total B

131.0

11.68

 

 

 

 

 

 

 

Total Part A & B

247.0

23.36

 

Mixing Instructions

Part A

Disperse the Kevlar IF 371 and the calcium carbonate into EPON Resin 828 using a Cowles Dissolver or other high shear mixer. High shear mixing is necessary to develop thixotropy with IF 371. Blend in the HELOXY Modifier 8 under moderate speed agitation until a uniform composition is obtained, then package.

 

Part B

Disperse the Kevlar IF 371 and the calcium carbonate into EPI-CURE 3061 Curing Agent using a Cowles Dissolver or other high shear mixer. High shear mixing is necessary to develop thixotropy with IF 371. Blend in the nonylphenol under moderate speed agitation until a uniform composition is obtained, then fill into tightly sealed containers.

 

Note: Absorption of atmospheric moisture into the curing agent during compounding or storage will reduce the working life of the combined formulation. If possible, the blending tank should be covered during compounding of the converter portion. A blanket of inert gas provides additional insurance against moisture contamination.

 

Typical Handling Properties

Table 1 / Handling Properties

 

 

Units

Value

 

Combining Ratio (Resin to Converter)

by weight

100 : 113

 

 

by volume

1 : 1

 

Viscosity at 25°C, cP

Resin

Portion

Converter

Portion

Blended

System

 

1 rpm

4,000

11,900

5,300

 

5 rpm

2,540

7,640

3,100

 

10 rpm

2,250

5,980

3,000

 

20 rpm

2,010

4,790

2,780

 

 

 

 

 

Weight per Gallon of Combined System

lbs/gal

10.6

 

Expected Pot Life at 25 °C, 1 pint mass

hrs

4-1/4

 

Gel Time of Coatings at 25 °C

 

 

 

3 mil thickness

hrs

30

 

15 mil thickness

hrs

24

 

Tensile Shear Strength

 

 

 

Aluminum to Aluminum

psi

2,420

 

Steel to Steel

psi

2,540

 

Set Time of Bond Coat at 25 °C

 

 

 

3 mil thickness

hrs

30

 

15 mil thickness

hrs

24

 

Application Instructions

The old concrete should be cleaned by either sandblasting, scarification with a Tennant machine, routing or acid etching. If acid etching is employed, the residual acid and salts should be removed by flushing with a high pressure water stream or scrubbed with a stiff bristle broom and water. The old concrete should be visually dry for best bonding results. Cleaning of the old substrate is especially important for maintaining high strength bonds in ongrade and below-grade structure.

 

Blend the resin and converter portions thoroughly prior to applying. The two components may be color coded by the incorporation of pigments to aid identification and to determine visually when the combined system is completely mixed.

 

Apply the freshly mixed bond coat to the old concrete or other substrate in a thickness of approximately 5 to 10 mils. Coverage per gallon should range from 160 to 320 square feet. The bond coat may be applied by means of brush, roller, notched trowel or spray. The long pot life of the system permits use of conventional spray equipment. A Binks Model 62 pressure gun equipped with fluid nozzle 68, air nozzle 60 PB, needle No. 368, and operating under a line pressure of 60 psi and a cup pressure of 15 psi is one satisfactory setup. If the bond coat components are cooler than normal room temperature, the addition of up to 10 percent xylene or toluene may be necessary to provide adequate sprayability.

 

This bond coat will cure at practical rates at temperatures above 50 °F. Application is not advisable when the ambient temperature is below 50 °F, or below 55 °F and falling.

 

The freshly mixed concrete can be placed immediately after application of the bond coat or over a period of several hours, providing the bond coat has not gelled. At normal room temperature, no decrease in bond strength was observed when the fresh concrete was placed 6 hours after application of the bond coat.

 

Typical Adhesive Properties

Table 2 / Adhesive Properties

 

Tensile Bond Strength (New Concrete to Old)

psiat Rupture

Mode of Failure

 

Time interval between application of bond coat and placement of concrete:

 

 

 

10 minutes at 25 °C

278

100% concrete

 

2 hours at 25 °C

263

100% concrete

 

6 hours at 25 °C

285

100% concrete

 

 

 

 

 

Effect of substrate dampness and environmental conditioning:

 

 

 

Old concrete dry; new concrete cured at 50% RH

278

100% concrete

 

Old concrete dry; new concrete cured at 50% RH; then specimen partially immersed in water for 2 weeks and tested damp

291

100% concrete

 

Old concrete partially immersed in water; new concrete cured at 100% RH; specimen tested damp

200

100% concrete

 

Storage

Recommendations regarding storage conditions can be obtained by visiting our web site at www.hexion.com

 

 

General Information

These are starting formulations and are not proven in the user’s particular application but are simply meant to demonstrate the efficacy of the products and to assist in the development of the user’s own formulation.  It is the user’s responsibility to fully-test and qualify the formulation, along with the ingredients, methods, applications or equipment identified herein (“Information”), by the user’s knowledgeable formulator or scientist, and to determine the appropriate use conditions and legal restrictions, prior to use of any Information.

 

Safety, Storage & Handling

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

 

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.

 

 

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

 

 
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