ADCOTETM 7742

Laminating Adhesive

Description 

Adcote 7742 adhesive is a solution of a tacky solid polyester resin. Adcote 7742 can be used as an 

adhesive resin or as a modifier for softer or harder Mor-Ester resins. It can be crosslinked with Coreactant F 

to further improve chemical and temperature resistance. Adcote 7742 resin has excellent adhesion to most 

plastic films and to metal surfaces. 

Features Benefits

• Excellent adhesion • Broad use on most surfaces

• U.V. stable • Excellent weatherability

• Low flow melt temperature • Low lamination temperatures

• High pigment/filler acceptance • Enhanced chemical and temperature properties

• Crosslinkable • Broad temperature range flexibility

• Low glass transition temperature • Improved pigment binding

Typical Applications

• Flexible packing laminates • Gravure ink base 

• In-line primer • Electrical laminates

Typical Solution Properties*

Weight Percent Solids 41.0-44.0%

Viscosity 1600-5000 cps

Specific Gravity 0.972-0.996

Weight/gallon 8.1-8.3 lb

Solvent Toluene

Recommended Diluents Toluene, methyl ethyl ketone, ethyl acetate

Shelf Life 360 days (unopened containers)

Typical Dry Resin Properties*

Resin Only Resin Crosslinked With Coreactant F

(100:6.4 phr)

Specific Gravity 1.21 --

Ring & Ball Softening Point 94C (200F) >232C (450F)

Tensile Strength 1000 PSI 6300 PSI

Elongation 1600% 900%

100% Modulus 250 PSI 1300 PSI

Acid Number <2 --

Hydroxyl Number <10 --

Glass Transition 14C (57F) --

Shore "D" Hardness 19.5 --

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

considered part of a product specification.

Adcote 7742 April 2011 Page 1 of 3

PACKAGING AND

CONVERTING

ADHESIVES AND SEALANTS
Adcote 7742 April 2011 Page 2 of 3

Suggested Coreactants:

100 parts Adcote 7742: 6.4 parts Coreactant F

100 parts Adcote 7742: 4.8 parts Coreactant 9L10

100 parts Adcote 7742: 4.8 parts Coreactant CT

Precautions

See Material Safety Data Sheets for hazardous ingredients, flammability, disposal, and related handling 

information. Adcote 7742 resin can react or interact with other components of the structure. Retained 

solvents, slip additives, antiblock agents, and contaminated solvents are some of the components that may 

cause property changes of the substrates and/or Adcote 7742 resin.

General Information

The initial color and clarity of Adcote 7742 resin will remain unchanged after outdoor exposure. In addition, 

Adcote 7742 resin is resistant to attack by dilute acid and alkali solutions. When mixed with coreactant, the 

tensile strength and resistance to chemical plasticizers, solvents and water are noticeably improved. The 

melting temperature range will also increase. With some substrates, the addition of a coreactant may 

improve adhesion.

High molecular weight polyester adhesives like Adcote 7742 have a tendency to form a reversible 

structure in solution with time. This structuring is accelerated when the adhesive is exposed to 

temperatures below 50°F. The structuring is reversible if heat and shear are applied to the adhesive. We 

recommend placing the container of adhesive in a steam cabinet, allowing venting of the container and 

heating to 110–140°F. After the adhesive reaches the proper temperature, mix the adhesive in the 

container for 1–3 hours under moderate shear. Use of a disperser or “Cowles” type blade will shorten the 

time needed.

Caution must be taken because of the flammability of the solvents used in the adhesive. Please 

review MSDS for hazards associated with the adhesive.

Attempting to redisperse without heat may reduce the apparent viscosity, but not result in a 

homogeneous mix. Before using the adhesive, check, to make sure that all resin has returned to a true 

solution and no gels remain.

Directions For Use

Apply Adcote 7742 resin by any of the conventional methods, including gravure coater, reverse roll coater, 

knife and spraying. Dilution may be necessary. Apply enough wet coating to deposit 0.1-0.3 dry mils (or 

approximately 2–6 dry lb per 3000 square feet) and completely remove the solvents. Laminate with heated 

nip rolls to provide a minimum glue line temperature of 140°F.

The preferred method for bonding is to coat the more stable substrate, heat the glue to a temperature above 

140°F, and laminate. A heated press can be used for general purpose bonding by employing enough 

pressure to insure intimate contact between the adhesive and both surfaces, and holding this pressure until 

the glue line reaches 140°F.

When using Coreactant, use the amount shown in the Suggested Coreactants section as a guide. The 

optimum level of coreactant should be determined experimentally for each particular end use. Coating with 

coreactant is handled in the same manner as without. Curing begins after solvent removal and continues 

slowly at room temperature. Approximately 7–14 days are necessary to complete the cure at room 

temperature, but a post cure at elevated temperatures can reduce this time.
Adcote 7742 April 2011 Page 3 of 3

Pot Life

It is best not to mix more Adcote 7742 resin and coreactant than will be used in 8 hours. Any mixed solution 

that is left over should be stored in tightly closed containers and should be used within 3 days. When 

reusing, we recommend that you combine the old mixed solution with newly mixed solution in the ratio of 

25% old and 75% new, and mixed thoroughly.

Safety Precautions

Adcote 7742 resin contains somewhat toxic and/or flammable solvents and suitable handling precautions 

should be observed. Do not inhale the fumes. Avoid prolonged and repeated contact with the skin. Eye 

contact must be prevented. Synthetic gloves, face shields, and aprons impermeable to these solvents 

should be worn when there is possible skin contact. Use NIOSH approved respirators to avoid fumes.

Adcote and Mor-Ester are registered trademarks 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

The Dow Chemical Co, Midwest Technical Center, 1500 E Lake Cook Rd, Buffalo Grove, IL 60089

Phone: 847-215-8600 Fax: 847-808-3858