Adcote 331 December 2007 Page 1 of 3

ADCOTETM 331 Laminating Adhesive

Description 

Adcote 331 adhesive is a single component, isocyanate terminated, polyether urethane adhesive, which

requires moisture to cure. 

Adcote 331 adhesive adheres to a wide variety of substrates including cellophane, treated polyolefins,

polyester, polyamides, paper, PVDC coated materials, and the treated heat sealable layers of coextrusions. 

Adcote 331 adhesive produces optical clarity, high bond strength, and a high level of heat and chemical

resistance. This adhesive is intended for use in non-critical and semi-critical applications. 

The cure rate of laminations made with Adcote 331 adhesive is dependent on the temperature and relative 

humidity of the storage or holding area. 

Typical Properties* 

Solids 75% 

Viscosity 4500 cps at 25°C 

Weight/Gallon 8.8 lb

Solvent Ethyl Acetate

Diluents Urethane Grade Ethyl Acetate, Methyl Ethyl Ketone, Toluene, 

1,1,1- Trichloroethane and some blends of these solvents with Hexane or Heptane 

Shelf Life 360 days (unopened containers stored in cool, dry place)

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

considered part of a product specification. 

Typical Uses

The principal uses for Adcote 331 adhesive are snack food packaging, bottle label laminations, meat and 

cheese packaging, dry food packaging, and non-foil condiment packaging. 

Safety, Handling and Storage

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

closed. 

• Hot organic chemical vapors can suddenly and without warning combust when mixed with air. Ignition

can occur at typical elevated temperature process conditions. Please evaluate such processes to 

assure safe handling conditions. 

• Support and ground containers before opening, dispensing, mixing, pouring or emptying. Open with

non-sparking tools. If container is warm, open bung slowly to release the internal pressure. 

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

launder contaminated clothing before re-use. 

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PACKAGING AND

BUILDING MATERIALS 

ADHESIVES AND SEALANTS 
Safety, Handling and Storage (continued) 

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

is empty. Do not use heat, sparks, open flames, torches or cigarettes on or near empty containers. 

Do not reuse empty container without professional cleaning. 

• Refer to Material Safety Data Sheet for more information. 

Alcohol and similar materials containing active hydrogen can react with Adcote 331 adhesive causing

inadequate cure. 

Adcote 331 can react or interact with other components of laminations. Retained solvents, slip additives,

antiblock agents and contaminated solvents are some of the components that may cause property changes

of the film and/or adhesive.

Under certain conditions, Adcote 331 adhesive can contribute to the problem of loss of sealability in finished 

laminations. 

Recommended Operating Conditions

Application Method Direct Gravure 

Application Cylinder 110 - 150 line

Application Solids 25 - 35% 

Dry Adhesive Weight 1.0 - 1.5 lb/ream 

Drying Web Temperature 150° - 180°F 

Laminating Temperature 130° - 170°F 

Cure Time 5 - 7 days at 70°F 

Slitting/Rewinding Time 4 - 8 hr at 70°F 

Cleaning Solvent Methyl Ethyl Ketone 

Dilution Table for 100 Lb Mix

 % Solids Adcote 331 Thinner 

 35 46.7 lb 53.3 lb 

 30 40.0 lb 60.0 lb 

 25 33.3 lb 66.7 lb 

______________________________________________________________________ Adcote 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 

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Rohm and Haas Food and Drug Opinion

Product Name: ADCOTE 331 

Regulation Number Complies Limitations Opinion Date

21CFR175.105 L 1 Aug 29, 2000

Legend:

L Yes, this product is cleared with limitations as noted. 

Limitations:

1 SOLVENT MUST BE COMPLETELY EVAPORATED DURING DRYING 

AND CURING. 

Regulations:

 21CFR175.105 ADHESIVES 

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.