Mor-Free L 75-176/CR 88-121 August 2011 Page 1 of 3

MOR-FREETM L 75-176/CR 88-121

Solventless Laminating Adhesive 

Description

Mor-Free L 75-176/CR 88-121 is a solvent-free, 100% solids, two component polyurethane adhesive system.

As the reactivity of Mor-Free L 75-176/CR 88-121 is high, the laminates can generally be further processed 

in as little as 6 hours. As always, converters should verify appropriate cure times for their individual 

application.

Mor-Free L 75-176/CR 88-121 can be used for laminating all polyolefin films, including LDPE to LDPE, 

OPP to OPP, and OPP to LDPE, as well as nylon, aluminum, polyester, and other packaging substrates.

The films may be unprinted or reverse printed with the appropriate laminating grade inks.

Mor-Free L 75-176/CR 88-121 offers rapid bond development to decrease time needed for processing while 

offering good metal adhesion. Mor-Free L 75-176/CR 88-121 can be used for a wide range of applications.

Typical Properties*

(Isocyanate) (Polyol)

Mor-Free L 75-176 CR 88-121

Solids 100% 100%

Viscosity 5600-7000 cps 550-950 cps

Density 1.14 g/cm3 0.99 g/cm3

Appearance Clear, Yellow Clear

Mix Ratio 100 pbw 45 pbw

100 pbv 52 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 containers in dry rooms at temperatures of 12°-35°C.

Mor-Free L 75-176/CR 88-121 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 L 75-176/CR 88-121 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.

Mor-Free L 75-176 is sensitive to moisture and should be stored under and transferred with dry nitrogen.

Recommended Coating Weight Range: 1.3 - 2.1 g/m2

Mor-Free L 75-176/CR 88-121 August 2011 Page 1 of 3

PACKAGING AND

CONVERTING
Mor-Free L 75-176/CR 88-121 August 2011 Page 2 of 3

The original viscosity of the mixture can be reduced by preheating the application rollers to a typical 

temperature of 45° - 50C. Higher temperatures may be required depending on the line speed, machine 

configuration, and choice of substrates. The recommended application roll temperature is 45°C.

For short trial runs 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 L 75-176/CR 88-121, 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. If the applicable unit and mixing device 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.

Safety, Handling and Storage

 Mor-Free L 75-176/CR 88-121 can be stored for 360 days in airtight, closed, original containers in dry 

rooms at temperatures of 12° - 35C. Opened containers should be used as quickly as possible.

 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 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.
Mor-Free L 75-176/CR 88-121 August 2011 Page 3 of 3

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0.52.54.56.58.5

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Viscosity (mPas)

Time (minutes)

Potlife of Mor-Free L 75-176 + CR 88-121

@ 45°C [100:45]

Mor Free L 75-176+ CR 88-121 

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40°C 45°C 50°C

Viscosity [mPas]

Mixed Viscosity vs. Temperature of Mor-Free L 75-176 + CR 88-121

Mor-Free L75-176+CR 88-121