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Adhesion Promoters PUREti for printing Inks

Polygel PUREti adhesion promoters are the most critical ingredients in liquid packaging flexo and gravure printing inks. These are also called organic titanates as well.

Organic titanates have historically been used in printing inks as an additive to enhance the adhesion as well as an overall performance of an ink printed on the substrate for variety  of packaging applications but more specifically for  flexible packaging market segment.

Any ink formulator can formulate printing ink that can adhere well on any difficult  flexible film substrates using variety of performance enhancing  resin chemistries such as Polyurethane, Polyamides, Vinyls, Polyvinyl Butyral, Acrylic etc., however when it comes to making an ink formula more versatile or rather a universal for adhering on to a gamut of substrates, Polygel PUREti organic titanates come to rescue and become the only additives of choice for an ink formulator.

They are quite beneficial specifically in the printing inks based on cellulosic resins e.g. Nitrocellulose as pigment grinding  resin let down with other supporting  resins having  OH and COOH functionality on it.

These functional groups are very essential for organic titanates to do their job efficiently which is to promote an ink adhesion on to printed substrates. They not only improve the adhesion but also improve  the adhesion but also improve heat resistance properties of printed ink such as rub, scratch, grease, moisture and in general improve the overall performance of the printed package.

Although, these titanates do improve above mentioned properties, some flexible films do require surface modification by corona, flame or plasma treatment in order to generate reactive functional groups (-OH, -COOH), so these titanate chelates can perform effective bridging between film and resin. Typical such adhesion mechanism is shown below.

 

Products & their Key Features
There are three different grades of PUREti adhesion promoters manufactured and supplied by Polygel Specialties. Below are these products and their key features.

Key Features:

  1. PUREti TIC-30
    • Titanium Phosphate ester complex
    • Acetyl Acetone free adhesion promoter for solvent based inks
    • Adhesion promoter with  low odor, reduced yellowing/color
    • Helps forming bond between the ink resin and film surface
    • Provides printed substrates with increased water, grease and heat resistance
    • Improved adhesive and extrusion lamination bonds
    • Ideal choice for ink formulator

  2. PUREti TAA-75
    • Titanium Acetyl Acetonate
    • Crystallizes at low temperature
    • Used as an adhesion promoter in solvent based  inks
    • Helps forming bond between the ink resin and a film surface
    • Used where quick and high performance is required but only if odor or yellowing is not a concern for end use packaging
    • Low cost option

  3. PUREti TAA-65
    • Titanium Acetyl Acetonate- Non freezing version
    • Used as an adhesion promoter in solvent based inks
    • Helps forming bond between the ink resin and film surface
    • Provides printed substrates with increased water, grease and heat resistance where high performance is required
    • Used if odor & taint  is not a concern for end use packaging.
    • Better extrusion lamination bonds than non TAA version

Details of the products:

Product Name Identification Suitability Benefits Applications
PUREti TIC-30 CAS:109037-78-7
EC: 401-100-0
Flexographic/Gragvure
NC/PA and NC/PU Inks
Flexible packing film
Acetylacetonate free
Low odor, low color.
Improved pigmentdispersion
Improved gloss of curved ink

 
PUREti TAA-75 CAS: 17927-72-9
EC: 241-866-1
Thermal Hardening Coatings
Silicone or 2K Coatings Solvent based
High reactivity.
Improved adhesion
Improved coupling effect
1.Used as an adhesion promoter in solvent based printing ink with nitrocellulose / polyurethane or nitrocellulose / polyamide resin systems.
2.Performs the critical role of bond formation between the ink resin and film surface. Its use also provides the printed substance with increased water, grease and heat resistance.
3.Cross linking agent for hydroxyl compounds
4.Used as a cure catalyst
5.Used as a coupling agent for fillers and fibers

PUREti TAA-65 CAS: 17927-72-9
EC: 241-866-1
Thermal Hardening Coatings
Silicone or 2K Coatings Solvent based
High reactivity.
Improved adhesion
Improved coupling effect
1.Used as an adhesion promoter in solvent based printing ink with nitrocellulose / polyurethane or nitrocellulose / polyamide resin systems.
2.Performs the critical role of bond formation between the ink resin and film surface. Its use also provides the printed substance with increased water, grease and heat resistance.
3.Used as a coupling agent for fillers and fibers.

There are 3 categories in
Organic Titanates
: