Adcote 577/T-8384 April 2009 Page 1 of 5

ADCOTETM 577/Coreactant T-8384 

Laminating Adhesive

Description 

Adcote 577 is the isocyanate terminated polyester urethane component of a two component adhesive 

system which requires the use of coreactant T8384 to achieve full properties. 

Adcote 577 adhesive provides high bond strength and a high level of heat and chemical resistance.

The cure rate of laminations made with Adcote 577 adhesive is dependent on the temperature and relative 

humidity of the storage or holding area. 

Typical Properties* 

Adcote 577 Coreactant T-8384

Solids 75% 70%** 

Viscosity 3900 cps <50 cps

Weight/Gallon 9.7 lb 9.0 lb

Solvent Ethyl acetate Ethyl alcohol

Diluents Urethane grade ethyl acetate 

Mix Ratio 100 pbw 2.5 pbw

Shelf Life 360 days 270 days

(unopened containers)

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

considered part of a product specification. 

**T-8384 is 100% reactive. May contain small amounts of proprietary organic solvents. See MSDS for

details. 

Typical Uses

Adcote 577/T-8384 can be used in retortable structures to laminate polyester to foil or nylon to foil. The 

adhesive layer must be separated from the food product by a functional barrier. Consult your 

Rohm and Haas Company sales representative for suggestions regarding the inner ply, i.e. the foil/cast 

polypropylene component.

Adcote 577/T-8384 can be used for laminations where high chemical resistance from foods and chemicals is

required. Adcote 577/T-8384 can also be used as an in-line primer for extrusion laminating and coating,

where enhanced adhesion and heat resistance is needed. Consult your Rohm and Haas Company sales

representative for suggestions. 

Mixing Instructions

Add the proper amount of T-8384 coreactant to the diluent solvent, then add this mixture to the 577 

adhesive. Adding T-8384 directly to either 60% solids 577 or diluted mixes without pre-dilution of the T-8384, 

may result in a cloudy mixture. 

Adcote 577/T-8384 April 2009 Page 1 of 5

PACKAGING AND

CONVERTING
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. 

• 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 (except for the minor amount contained in the 2% addition of Coreactant T-8384 to the adhesive) 

and similar materials containing active hydrogen can react with Adcote 577 adhesive causing inadequate

cure. 

Adcote 577 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.

Recommended Operating Conditions 

Application Method Direct gravure

Application Cylinder 110 - 150 line

Application Solids 40 - 45% 

Dry Adhesive Weight 2.0 - 3.5 lb/ream 

Drying Web Temperature 150 - 180°F 

Laminating Temperature 150 - 220°F 

Cure Time 7 - 10 days at 70°F 

Slitting/Rewinding Time 24 - 48 hours at 70°F 

Cleaning Solvent Methyl ethyl ketone or ethyl acetate

Adcote 577/T-8384 April 2009 Page 2 of 5
Solids vs Viscosity Curve Zahn#2 

Adcote 577/T-8384 (100/2.5pbw) Diluent Ethyl Acetate

10

12

14

16

18

20

22

24

26

28

30

% Solids 

Viscosity in Sec. @ 25°C

577/T-8384 12.76 13.56 14.02 15.16 17.21 20.55 27.53

20 25 30 35 40 45 50

Adcote 577/T-8384 April 2009 Page 3 of 5
Solids vs Viscosity Curve Brookfield 

Adcote 577/T-8384 (100/2.5pbw) Diluent Ethyl Acetate

0

20

40

60

80

100

120

% Solids

Viscosity cps @

25°C

577/T-8384 19.03 25.53 35.47 47.7 58.5 76.9 104

20 25 30 35 40 45 50

_________________________________________________________ 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 

Adcote 577/T-8384 April 2009 Page 4 of 5
Rohm and Haas Food and Drug Opinion 

Name: ADCOTE 577 

Regulation Complies Opinion 

Date Limitations 

21CFR175.105 L 12/02/2005 ▪ SOLVENT MUST BE COMPLETELY EVAPORATED DURING 

DRYING AND CURING. 

21CFR177.1395 A 12/02/2005 ▪ Adcote 577 and Adcote 577B, used at a ratio of 100:7, at 1.76 

lb/ream, and cured for 3 days at room temperature, may be used as 

an adhesive layer in multilaminate food packaging materials with 

aqueous food types with a food contact layer of at least 2 mil of 

LLDPE at conditions of use C through G in full compliance with the 

United States Federal Food, Drug, and Cosmetic Act. 

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

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. 

Name: COREACTANT T-8384 

Regulation Complies Opinion 

Date Limitations 

21CFR175.105 Y 06/08/2005

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

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. 

Adcote 577/T-8384 April 2009 Page 5 of 5