MOR-FREETM 403A/Mor-Free Coreactant C-117 

Solventless Laminating Adhesive

Description and Features

Mor-Free 403A + Coreactant C-117 is a solventless, two component, polyurethane adhesive system which is

applied at low temperature. Mor-Free 403A is suitable for laminating nylon, aluminum, polyester, 

polyethylene, and other packaging substrates, unprinted or reverse printed. 

Typical Properties* 

 (Isocyanate) (Polyol)

Mor-Free 403A Mor-Free Coreactant C-117

Solids 100% 100% 

Viscosity 77°F 1700 cps 4,500 cps

Weight/Gallon 9.8 lb 10.1 lb 

Appearance Clear, yellow Clear

Odor Practically none Practically none

Mixing Ratio 100 pbw 100 pbw

 100 pbv 97 pbv 

Shelf Life** 360 days 360 days

(unopened containers)

*These items are provided for general information only. They are approximate values and are not

considered part of a product specification. 

**Store in tightly closed container in cool, dry place. 

Mor-Free 403A + Mor-Free Coreactant C-117 may react or interact with other components of laminations. 

Retained volatiles (solvents or water), slip additives, antiblock agents and inks are some of the components

that may cause property changes of the laminated structure. If Mor-Free 403A + Mor-Free Coreactant C-117 

is used on high slip films (COF < 0.2) or with high slip LDPE/LDPE laminations, then the user must verify that

potential film property changes due to the lamination process and materials, are acceptable for the end use

performance requirements.

Processing

Mor-Free 403A + Mor-Free Coreactant C-117 must be used on machines which have been specially

designed for solventless laminations. Such equipment allows the adhesive to be fed through a

meter/mix/dispense device and provides web tension controls designed for adhesives with low initial tack. 

As the reactivity of Mor-Free 403A + Coreactant C-117 is high, the laminates can generally be further

processed in as little as 6 hours, depending on the laminate construction. The chemical curing is generally

completed within 7 days at 75°F, depending on the laminate construction. As always, converters should

verify appropriate cure times for their individual application. 

Application Temperature

We recommend the application roll be set at 120° - 140°F (50° - 60°C) or higher, depending on machine 

design and line speed desired. No preheating of the adhesive or coreactant at the meter/mix/dispense

unit is required. 

Mor-Free 403A/C-117 August 2009 Page 1 of 5

PACKAGING AND

CONVERTING
A relatively slow initial increase in viscosity is due to the exothermic reaction of the adhesive immediately 

after the mixing process and the mechanical influences in the application system. 

For short trial runs the adhesive can be batch mixed. We recommend preparation of no more adhesive than

can be used within 5-10 minutes. A high speed stirrer suitable for a homogeneous mixing should be used. 

However, the use of a meter/mix/dispense device which continuously mixes the adhesive at the chosen 

ratio, controls the feeding of the application unit, and stops production automatically in case of machine

failures, is indispensable for extended trials and normal production. 

When processing Mor-Free 403A, the safety rules for working with isocyanates must be observed. The 

adhesive contains monomeric MDI. See Material Safety Data Sheet for specific details. 

Cleaning 

The application unit should be cleaned before the adhesive becomes insoluble by progressive curing, if the

machine stops take more than 30 minutes. Methylene chloride can be used to flush the mixing and

metering units where a non-flammable solvent is required. Consult the Material Safety Data Sheet from the

methylene chloride supplier for safe handling. 

If the application unit and mixing devices are combustion proof, they may be cleaned with esters or ketones 

such as ethyl acetate and MEK. 

Several commercially available solvents are safe and effective for flushing and cleaning Mor-Free adhesive

residues from solventless laminators and meter/mix/dispensing equipment that do not have combustion

proof ratings. We recommend contacting either Dynaloy, Inc. (800-669-5709; www.dynaloy.com), or

Danko Industries (630-882-6070) for cleaning solvent recommendations. Always consult the solvent

supplier’s MSDS for safety information before use. 

Storage 

Mor-Free 403A and Mor-Free Coreactant C-117 can be stored for 360 days in airtight, closed, unmixed,

original containers in dry rooms at temperatures of 70° ± 15°F. Opened containers should be used as 

quickly as possible. 

Safety, Handling and Storage 

• Store in cool, dry, well-ventilated area away from heat and ignition sources. Keep container tightly 

closed. 

• Follow good manufacturing and handling practices. 

• Wash thoroughly after handling. Wash contaminated goggles, face shield, and gloves. 

Professionally launder contaminated clothing before re-use. 

• ATTENTION! Container can be hazardous when empty. Follow label warnings even after container 

is empty. Do not reuse empty container without professional cleaning. 

• Refer to Material Safety Data Sheet for more information. 

Mor-Free 403A/C-117 August 2009 Page 2 of 5 
Mor-Free 403A/C-117 August 2009 Page 3 of 5 

Pot Life @ 55°C

Mor-Free 403A + C-117 (100:100 pbw)

0

1000

2000

3000

4000

5000

6000

7000

5 10 20 30 40

Time, Minutes

Viscosity, CPS

Temperature vs. Viscosity

Mor-Free 403A + C-117 (100:100 pbw)

0

200

400

600

800

1000

1200

1400

40 50 60 70

Temperature of Mixture, °C

Viscosity, C

P

S

Mor-Free is a registered trademark of Rohm and Haas Company. 

These suggestions and data are based on information we believe to be reliable. They are offered in good faith, but without 

guarantee, as conditions and method of use of our products are beyond our control. We recommend that the prospective user 

determine the suitability of our materials and suggestions before adopting them on a commercial scale.

Suggestions for uses of our products or the inclusion of descriptive material from patents and the citation of specific patents in this 

publication should not be understood as recommending the use of our products in violation of any patent or as permission or license 

to use any patents of the Rohm and Haas Company. 

Visit us at http://www.rohmhaas.com/AdhesivesSealants

Rohm and Haas Company, Midwest Technical Center, 2531 Technology Drive, Suite 301, Elgin, IL 60124

Phone: 847-649-3800 Fax: 847-649-3760 
Mor-Free 403A/C-117 August 2009 Page 4 of 5 

Rohm and Haas Food and Drug Opinion 

Name: MOR-FREE 403A ADHESIVE 

Regulation Complies Opinion 

Date Limitations 

21CFR175.105 Y 07/21/2009

21CFR175.300 N 07/21/2009

Legend: 

L Yes, this product is cleared with limitations noted

N No, this product is not cleared

Y Yes, this product is cleared.

A Affirmed as compliant based on migration studies.

Regulations: 

21CFR175.105 Adhesives

21CFR175.300 Resinous and polymeric coatings

Disclaimer: 

 This information relates specifically to this product. We believe this information to be accurate and 

reliable as of this date. 

 We recommend that our customers make their own determination on the suitability of this product for 

their particular application.

 We cannot guarantee that the indirect food additives/food-contact status of this product will remain 

unchanged indefinitely; therefore we recommend that you periodically verify its status. 
Mor-Free 403A/C-117 August 2009 Page 5 of 5 

Rohm and Haas Food and Drug Opinion 

Name: MOR-FREE COREACTANT C-117 Resin 

Regulation Complies Opinion 

Date

Limitations 

21CFR175.105 Y 05/16/2006

21CFR175.300 Y 05/15/2006

21CFR175.320 Y 05/15/2006

21CFR176.170 L 05/16/2006 ▪ PROVIDED THAT THE FOOD CONTACT SURFACE OF THE 

PAPER AND PAPERBOARD COMPLIES WITH THE

EXTRACTIVES LIMITATIONS IN 21CFR176.170 PARAGRAPH (C).

21CFR176.180 Y 05/15/2006

21CFR177.1390 A 05/15/2006 ▪ A = AFFIRMED AS COMPLIANT BASED UPON MIGRATION 

STUDIES. THE COMBINATION OF MOR-FREE 407A/MOR-FREE 

COREACTANT C-117 MAY BE USED AS AN ADHESIVE LAYER 

IN MULTILAMINATE FOOD PACKAGING MATERIALS WITH ALL 

FOOD TYPES AND WITH NO LIMITATIONS AS TO THE TYPE OF 

FOOD-CONTACT LAYER USED IN COMPLIANCE WITH THE 

FEDERAL FOOD, DRUG, AND COSMETIC ACT.

21CFR177.1395 L 05/15/2006 ▪ In accordance with the limitations as described under 

21CFR177.1390 above. 

Legend: 

L Yes, this product is cleared with limitations noted

N No, this product is not cleared

Y Yes, this product is cleared.

A Affirmed as compliant based on migration studies.

Regulations: 

21CFR175.105 Adhesives

21CFR175.300 Resinous and polymeric coatings

21CFR175.320 Resinous and polymeric coatings for polyolefin films

21CFR176.170 Components of paper and paperboard in contact with aqueous and fatty foods

21CFR176.180 Components of paper and paperboard in contact with dry food

21CFR177.1390 Laminate structures for use at temperatures of 250F and above

21CFR177.1395 Laminate structures for use at temperatures between 120F and 250F

Disclaimer: 

 This information relates specifically to this product. We believe this information to be accurate and 

reliable as of this date. 

 We recommend that our customers make their own determination on the suitability of this product for 

their particular application.

 We cannot guarantee that the indirect food additives/food-contact status of this product will remain 

unchanged indefinitely; therefore we recommend that you periodically verify its status.