POLYTHICK SC-75 is a curing agent in a two-component type pressure-sensitive adhesive suitable for use in the production of paper, synthetic paper, polyester film self-adhesive labels and double-sided adhesive tapes. This product is applicable particularly to paper and synthetic paper labels used for frozen foods, due to its high adhesive strength and excellent tackiness even on wet surfaces and at low temperatures.

Functions: Curing Agent

Chemical Family: Acrylics, Acrylates & Methacrylates

Knowde Enhanced TDS

Identification & Functionality

CASE Ingredients Functions
Technologies

Features & Benefits

Features

POLYTHICK SC-75 system has the following features: ·

  • Exhibits high adhesive strength and excellent tackiness on glass, metal and plastics. Also, this product is applicable particularly to producing self-adhesive labels used for frozen foods, due to its high adhesive strength even on wet surfaces and at low temperatures. 
  • Displays high transparency and weather resistance because the main component is an acrylate polymer. 
  • Easily soluble in organic solvents such as ethyl acetate and toluene. ·
  • Excellent workability due to its low viscosity.

Applications & Uses

Application Methods

1. Preparation of Coating Solution ·

  • For coating solution, POLYTHICK 410-SA and POLYTHICK SC-75 should be mixed in the following proportions.POLYTHICK 410-SA: 100 (wt%),POLYTHICK SC-75: 0.2 − 0.5(wt%)
  • To adjust the concentration or viscosity of the coating solution for different coating amount. It should be diluted using ethyl acetate, toluene, or a combination of the two. 
  • Viscosity of the coating solution increases with time, and the rate of increase in viscosity varies with the ratio of POLYTHICK 410-SA to POLYTHICK SC-75 as well as the concentration and temperature of the coating solution. Determine the amount of coating solution which can be used up at optimal viscosity by checking the rate of viscosity increase in advance.

2. Coating 

  • Coating machines such as gravure roll coaters and comma coaters are generally used. The coating amount to be applied depends on the kind of substrate and application. However, the standard amount is 10 − 70 g(residue on evaporation)/m2 to achieve sufficient adhesive strength.

3. Drying 

  • Use of a hot-air dryer with multiple heat settings is recommended because this product contains an organic solvent with a low boiling point. The coating should be dried very well so that none of the organic solvent remains.

4. Curing 

  • After being dried, the coating should be cured for about 2 days between 40 and 60 °C or for approx. one week at ambient temperature (20 ± 15 °C).

For detailed information, please refer the Technical Data Sheet.

Properties

Physical Form
Odor
Slightly specific odor
Insoluble in
Water
Physical Properties
ValueUnitsTest Method / Conditions
100% Modulus (Dry Film after Immersion in Water)2.0
100% Modulus (by Dry Film Control Sample)2.5
Typical Properties
ValueUnitsTest Method / Conditions
Residue on evaporation approx. 75wt %
Auto-Ignition Temperature (Ethyl Acetate)427 (801)℃(°F)
Active Ingredientapprox. 51wt %
Viscosity at 25°Capprox. 1,400mPa·s
Freezing Point0(32)℃(°F)
Boiling Point (in Ethyl Acetate)77 (171)℃(°F)
Solvent Ethyl acetate
Explosive Properties (Ethyl acetate Upper limit)9.0%
Boiling Point (in Isopropyl Alcohol)82.5 (180.5)℃(°F)
Explosive Properties (Methanol Lower limit)2.2vol.%
Explosive Properties (Toluene Lower limit)1.1vol.%
Explosive Properties (Toluene Upper limit)7.1vol.%
Flash Point (Tag C.C.)-13 (8.6)
Pour PointBelow -10 (14)℃(°F)
Residue on Evaporationapprox. 38wt %
pH (1% Aqueous solution)9.5
Tensile strength at Break (Dry Film Control Sample)52.0

Technical Details & Test Data

Performance Tests

The results of performance tests conducted on the POLYTHICK 410-SA/POLYTHICK SC-75 system to determine stability, holding power, adhesive strength, and adhesive characteristics such as ball tack.

 

1. Stability of Coating Solution  

 

2. Adhesive Characteristics

  • POLYTHICK 410-SA/POLYTHICK SC-75 system exhibits high adhesive strength and excellent tackiness. It also displays high adhesive strength at low temperatures and adheres well to wet surfaces.

3. Adhesive Strength for Each Adherend

  • POLYTHICK 410-SA/POLYTHICK SC-75 system exhibits high adhesive strength for materials such as glass, stainless steel and various plastics.

For detailed information, please refer the Technical Data Sheet.