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Starting Formulation 1741  

Re-issued October 2012

 

Waterborne White Primer – 4:1 Ratio with <100 g/L VOC 

EPI-REZ™ Resin 6520-WH-53 / EPIKURE™ Curing Agent 6870-W-53

 

Introduction

This waterborne white primer is designed as an alternative to traditional, high VOC, solventborne epoxy / polyamide coatings.  This formulation does not require an induction time.  It provides superior anticorrosive performance; visible end of pot life, and a good balance of final performance properties (hardness, flexibility, abrasion-and chemical resistance).  This primer can be overcoated with a variety of coating types in two to three hours.  Compared to Starting Formulation 1700, it offers improved wet adhesion, in the  scribed and unscribed areas, after corrosion testing or water immersion. 

   

Suggested Uses

  • Corrosion resistant metal primer for industrial maintenance
  • Transportation primers (truck, bus, ACE)
  • Railcar coatings & small metal parts

Features

  • Non-HAP1 formula
  • VOC2 level of 0.71 lb/gal. (85 g/l)
  • Rapid dry and recoat (6-7 hrs, dry-through)
                                                   2 VOC is the acronym for volatile organic compound as defined by the U.S. 40CFR51.100 (s).

                                                  1 HAP is the acronym for hazardous air pollutant as defined by the U.S. Clean Air Act Amendments of 1990.

 

Formula

Material

Supplier

Pounds

Gallons

 

Part A

 

 

 

 

EPI-REZ Resin 6520-WH-53

Hexion

314.7

34.97

 

Propylene Glycol Propyl Ether (PnP)

Dow Chemical Co

7.3

0.83

 

Dipropylene Glycol n-Butyl Ether (DPnB)

Dow Chemical Co

12.8

1.71

 

EFKA 2526 Defoamer

CIBA Specialties Company

3.1

0.41

 

Anti-Terra U 100

BYK Chemie

10.5

1.25

 

Ti-Pure R-960

Du Pont

125.9

3.69

 

Sparmite A Barytes

Elementis Pigments

70.3

1.92

 

10ES Wollastocoat

NYCO Minerals

104.9

4.41

 

Disparlon L-1982N

King Industries

4.2

0.5

 

HALOX SW-111

HALOX Pigments

99.3

4.12

 

Wet Ground Mica, 325 Mesh

King Mountain Minerals

3.1

0.13

 

High Speed Disperse to a texture of 5-6 Hegman Scale.  Reduce speed, then add while continuing to mix

 

EPI-REZ Resin 6520-WH-53

Hexion

129.0

14.34

 

CoatOSil1770 Silane

Momentive Performance Materials

4.5

0.51

 

BYK 348  

BYK Chemie

4.5

0.51

 

 Water    

89.1

10.70

 

  

Total Part A

983.2

80.00

   

Part B 

 

 

 

 

EPIKURE Curing Agent 6870-W-53

Hexion

113.5

12.47

 

Raybo 60

Raybo Chemical

2.1

0.22

 

Water

 

60.8

7.30

 

 

Total Part B

176.4

20.00

 

 

 

 

 

 

 

Total Part A & B

1159.6

100.00

  

Mixing Instructions

 

Pounds

Gallons

 

Part A

983.2

80.00

 

Part B

176.4

20.00

 

Part A + B

1159.6

100.00

  

Typical Formulation Properties

Table 1 / Formulation Properties

 

 

Units

Value

   

Mix ratio Part A : Part B

By volume

4 : 1

   

 Amine hydrogen equiv. to Epoxy equiv. ratio (based on solids)

 

0.6 : 1

   

 Total weight solids

%

61.5

   

 PVC                                         

%

30

   

Volatile Organic Compound (VOC) 

lb/gal

0.71

   

  

g/L

85

   

 Viscosity

KU

73

   

 Pot life

hrs

3-4

  

Typical Film Properties

Table 2 / Film Performance Properties on smooth cold-rolled steel (CRS) panels 1

 

 

ASTM Method

Units

Value

   

Dry Film Thickness 

D-1186

mils

3 – 4

   

Dry Times (drawdowns, 3 mil dry)

Set-to-Touch, Stage II

Cotton Free, Stage III

Through, Stage IV

D-5895B

 

hrs

hrs

hrs

 

1.5

2.5

6.5

   

Pencil hardness

24 hrs

3 days

D-1186

 

 

3B

H

   

Gloss, (60°)

D-523

%

10

   

Sag resistance

 D-4400

mils

16

   

Salt Spray Resistance

B-117

hrs

1000

   

     Blister rating, field

D-714

 

10 - #9F

   

     Scribe creep

D-1654

mm

0-3

   

      Adhesion, in field area after 1 hr. recovery

D-3359

 

4A, 5B

                                                  1 Performance data is reported after 7 days at 77°F and 50% RH

  

Storage

Recommendations regarding storage conditions for Hexion epoxy resins, modifiers and curing agents can be obtained by visiting our web site at www.hexion.com/epoxy

 

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. The handling precautions and recommendations, as stated in the Material Safety Data Sheet (MSDS), for each product should be reviewed and understood by all persons before these products are used, stored or transported. 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/epoxy

® 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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