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The formulating flexibility of new ENCOR® 9466 makes it possible to achieve the best balance of peel, tack and cohesive strength for your permanent PSA film or paper label. That’s because this new base latex displays the excellent response to a wide range of tackifiers.  So, either you can compound the final PSA, or we will deliver a coater-ready product tailored to meet your exact requirements, and run on your specific coating line.

Features

  • High solids with low viscosity
  • Excellent balance of peel, tack and cohesive strength
  • Cleaner converting due to low surface tension and high cohesive strength
  • Very good adhesion to low surface energy substrates
  • Exceptional tackifier response
  • High line speed capability
  • FDA 21 CFR 175.105 compliance
  • EnVia® compliant

The data provided for these properties are typical values, intended only as guides, and should not be construed as sales specifications.

These products meet the standards of Arkema Coating Resins’ EnVia® program. These products are designed to assist formulators in meeting their sustainability and regulatory goals in their finished products.

Typical formulating options using ENCOR® 9466 latex

ENCOR®  9466 - Formulating options charts

Typical properties1

Total solids, % by weight 63.0
Weight per gallon, lb 8.6
pH value 5.5
Particle size, microns 0.4
Viscosity, Brookfield, LVT, No. 3, 60 rpm, cP 200
Glass transition temperature, °C -40
Surface tension, mN/m 31
VOC potential, g/L <5

Tackifier response1

ENCOR® 9466 latex offers excellent peel and tack adhesion with exceptional cohesive strength. Increased peel and tack can be achieved through formulating with resin dispersions.

The tackifier response of ENCOR® 9466 latex with commercially available products is listed below.

ENCOR® 9466 tackifier response1

Test ENCOR® 9466 Snowtack® 880G  Tacolyn® 1070    
  (Neat)  
20 pt*
30 pt* 40 ot* 20 pt* 30 pt* 40 pt
180° peel (lbs/linear inch)    
 
         
Stainless steel:              
   30 min. 3.0 A 3.0 A 3.4 A 4.0 A 3.7 A 3.7 A  

3.9 A

   24 h 3.7 A 3.5 A 3.7 A 4.3 A 5.0 C 4.8 C 4.7 C
HDPE:                
   30 min. 1.0 A 1.7 A 2.5 A 2.9 A 2.4 A 2.3 A 2.5 A
   24 h 1.2 A 1.8 A 2.4. A 2.5 A 2.7 A 2.7 A 3.2 A
Loop tack: (lbs/inch2)              
   Stainless steel 3.2 A 3.0 A 3.7 A 3.9 A 5.6 A 5.5 A 6.0 A
   HDPE 1.6 A 2.3 A 2.5 A 3.1 A 2.5 A 2.4 A 2.5 Z
Shear adhesion (hours, 1/2"x1/2", 500 g) >200 143 85 29 24 22 21

Modes of failure: A= Adhesive, C=Cohesive, Z=Zippy

Test ENCOR® 9466 Snowtack® 765A Aquatac® 6025  
  (Neat)  
20 pt*
30 pt* 40 ot* 20 pt* 30 pt* 40 pt
180° peel (lbs/linear inch)    
 
         
Stainless steel:              
   30 min. 3.0 A 5.6 C 5.5 C 5.0 C 5.0 C 4.6 C  

4.6 C

   24 h 3.7 A 5.6 C 5.5 C 5.0 C 5.2 C 4.5 C 4.8 C
HDPE:                
   30 min. 1.0 A 2.5 A 2.7 A 3.0 C 1.6 A 2.2 A 4.2 A
   24 h 1.2 A 3.7 A 3.0. A 3.0 C 1.7 A 2.2 A 4.2 A
Loop tack: (lbs/inch2)              
   Stainless steel 3.2 A 5.2 A 5,2 A 5.9 A 4.6 A 5.4 A 6.0 A
   HDPE 1.6 A 2.5 A 2.5 A 2.6 A 2.0 A 2.5 A 3.0 Z
Shear adhesion (hours, 1/2"x1/2", 500 g) >200 8.9 6.9 5.3 14.0 4.4
 

Modes of failure: A= Adhesive, C=Cohesive, Z=Zippy

Tested on 2-mil PET backing at a coat weight of 1.6 – 1.8 g/100 in2 , 73º F, 55% RH

1The data provided for these properties are typical values, intended only as guides, and should not be construed as sales specifications.

*Per 100pt dry latex

Formulating for enhanced performance

Predicting PSA performance and application space by mapping viscoelastic windows based on dynamic storage (G’) and loss (G”) moduli at bonding and debonding frequencies was proposed by Chang3. This methodology can be used to predict the performance of ENCOR® 9466 latex when formulated with specific tackifiers.

3Chang, E. P.; Viscoelastic Properties of Pressure-Sensitive Adhesives, The Journal of Adhesion, 1997, Vol. 60, pp. 233-248

Figure 1

Storage and loss modulus of Encor® 9466 measured over a frequency range of 0.01 to 100 rad/s at 25 °C

Using 0.01 to 100 rad/s as the bonding and debonding frequency, respectively, G’ and G” values of different PSAs can be plotted, creating a viscoelastic window of application.

Figure 2

Viscoelastic windows of different pressure sensitive adhesive type

A four quadrant classification system can be instituted to categorize PSA types based on their visco-elastic windows of application.

Figure 3

The viscoelastic window for ENCOR® 9466 overlaps that of a general-purpose PSA.

The exceptionally high cohesive strength of ENCOR® 9466 is predicted by the high storage modulus (G’) at 0.01 rad/s.

Figure 4

The viscoelastic window for ENCOR® 9466 blended with Snowtack® 880G

The addition of a high melting point tackifier such as Snowtack® 880G significantly increases the debonding or peel strength while having a minimal effect on cohesive strength. The result is a permanent PSA with excellent peel and tack while maintaining exceptional cohesive strength and convertibility.

Figure 5

The viscoelastic window for ENCOR® 9466 blended with Snowtack® 724G

The addition of a low Tg tackifier such as Snowtack® 724G significantly improves the wet out and bonding strength of the adhesive. The result is a permanent PSA with excellent peel and tack on low surface energy substrates with increased performance at low application temperatures.

Starting formulations

Permanent paper or filmic label (untackified)

Raw material Dry parts
ENCOR® 9466 100
Water Adjust to coating needs

Permanent paper or filmic label (tackified)

Raw material Dry parts
ENCOR® 9466 100
Snowtack® 880G 30
Water Adjust to coating needs
Raw material Dry parts
ENCOR® 9466 100
Tacolyn® 1070 20
Water Adjust to coating needs

Low-temperature label

Raw material Dry parts
ENCOR® 9466 1--
Snowtack® 724G 30
Water Adjust to coating needs

EnVia® certified

New ENCOR® 9466 latex meets the requirements of Arkema Coating resins’ EnVia® self-certification program for sustainable formulating, and also complies with FDA 21 CFR 175.105 requirement for adhesives used in food packaging.

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