2051

Link-Shine 2051

 

Chemical Name	Polydimethyl Silicone Dispersion Additive
Trade name	2051 Additive
Equivalents	DOWSIL DC-51 Additive

 

 

Water-dispersible, ultra-high-molecular-weight polydimethyl silicone dispersion that imparts slip and mar resistance.

 

 

1. Ultra-high-molecular-weight polydimethylsiloxane dispersion in paste form.
2. Supplied at 80% solids in water.

 

 

2051 Additive reduces coefficient of friction, provides anti-adhesion and improves mar resistance. 2051 Additive has been successfully used in these industrial applications:

1.To reduce the coefficient of friction:
a. Ink:
Water-based flexographic ink at 0.05–0.1%
Solvent-based flexographic ink at 0.5–1.5%
Water-based gravure ink at 0.1–0.2%
Water-based lithographic ink at 0.1–0.2%

b. Coating:
Water-based overprint varnish at 0.5–1.0%

c. Paint:
Water-based paint at 0.5–1.0%
Solvent-based paint at less than 0.5%

 

2.To provide anti adhesion:
a. Ink:
Water-based flexographic ink at 0.1–0.2%
Water-based gravure ink at 0.1–0.2%

 

3.To improve mar resistance:
a. Ink：
● Water-based flexographic ink at 0.1–0.2% or as low as 0.05–0.1% or as high as 0.5–1.0%
● Solvent-based flexographic ink at 0.5–1.5%
● Water-based gravure ink at 0.05–0.2% or as high as 0.5–1.0%
● Solvent-based gravure ink at 0.05–0.1%
● Water-based lithographic ink at 0.1–0.2%

b. Coating:
Water-based overprint varnish at 0.1–0.2% or as high as 0.5–1.0%
Water-based industrial coating at 0.05–0.1%

 

 

Specification Writers: These values are not intended for use in preparing specifications.

 

Property	Unit	Result
Nonvolatile Content	Percent(%)	77–82
Solvent		Water
Functionality		Silanol
Specific Gravity at 25°C (77°F)		0.980
Specific Gravity at 25°C (77°F)		0.980
Flash Point, Closed Cup	°C (°F)	> 101 (> 214)
Viscosity at 25°C (77°F)	cs	200,000–700,000

 

 

2051 Additive improves mar resistance and slip in water-borne systems or solvent-borne systems containing
Polar solvents; provides water resistance in water-borne systems; also imparts leveling, wetting and gloss.

 

 

2051 Additive is effective at low concentrations. The amount required depends on type of formulation, the solvent it contains, resin system and total system solids. 2051 Additive is generally effective at concentrations ranging from 0.05 to 3.0 weight percent, based upon total formulation. This additive can be added during the grind, let down or be post-added. Characteristics may vary when used with different systems and formulations. L-S 51 Additive is compatible with acrylic, alkyd, epoxy, nitrocellulose, polyesters, polyurethane and vinyl systems. Thorough preproduction testing is necessary to ensure expected performance.

 

 

This data is based on a laboratory study. The control in both of these studies consisted of the formulation with no additives added.
In Formulation 1, 2051 Additive decreased the static and kinetic coefficient of friction 19.9% and 15.4% over the control, respectively. While reducing the coefficient of friction, L-S 51 Additive did not cause addition foaming.
In Formulation 2, 2051 Additive provide a 23% increase in 60°gloss retention after dry mar testing over the control.Along with providing mar resistance, 99% of Formulation 2, containing 2051 Additive, remained on the film after the adhesion tape test, which is a 12.9% improvement over the adhesion of the control.
2051 Additive did not affect the recoatability of Formulation 2. Five minutes after a coat of white ink was applied over Formulation 2, containing L-S 51 Additive, 100% of the white ink remained adhered to Formulation 2. After 30 minutes, 97.5% of the white ink remained adhered. Both of these results are improvements over the recoatability with the control.
2051 Additive was tested in two water-based flexographic inks at 0.5 weight percent, based on actives. Formulation1 consisted of a non-film-forming, styrene-acrylic resin for paper and paperboard and Formulation 2 consisted of a soft-film-forming acrylic polymer for various films. 2051 Additive was post-added at 1200 rpm.

 

Formulation 1		Formulation 2
Ingredient	Percent(%)	Ingredient	Percent(%)
Joncryl 87	45.5	Joncryl ECO 2124	52.1
Flexiverse Diarylide Yellow Dispersant	52.9	Flexiverse Calcium Lithol Dispersion	45.6
Water	1.6	Water	2.3

 

 

Using a Monitor Slip and Friction, Model 32-06, the sample was pulled across an coated NWH Lenetta chart using a four-pound weight at a rate of 6 inches per minute.

 

 

Dry Mar
Using the Sutherland Rub Tester, the sample was rubbed against an uncoated Mobil 90 BSR One film for 100 double rubs using the four-pound test block. 60°gloss was measured before and after the marring. The higher the percent retention, the more effective an additive is in protecting the coating/ink.

 

Recoatability/Adhesion
Recoatability was tested by allowing the test sample to dry for 30 minutes, then coating a newly formulated ink on top. This newly formulated ink was the same formulation as Formulation 2 with white pigment. The new formulation was allowed to dry for 5 minutes before the adhesion test was performed.

 

Usable Life and Storage
When stored above 0℃ (32℉), 2051 Additive has a shelf life of 12 months from date of manufacture.
Refer to product packaging for "Use By" date.

 

Packaging Information
20kg/pail, 175kg/drum

 

Limitations
This product is neither tested nor represented as suitable for medical or pharmaceutical uses.

 

 

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