Polytone K-Series resins in polyurethane (PU)

Ketonic Resin are also known as:

  • Polyketone
  • Ketone Aldehyde Resin
  • Ketone Formaldehyde Resin
  • Cyclohexanone Formaldehyde Resin

Some Basic Facts:

  • Not functional in Water Based products.
  • It can be used “BASE” Resin”
  • It can be used a “BINDER”
  • It’s used as “ADDITIVE” or “ENHANCER” or “MODIFIER” in formulation
  • It turns “yellow” with time due to oxidation
  • It is “hygroscopic” (attracts water)
Inks -Any Solvent Based Polyurethane (PU) Nitrocellulose Based
Ball Pen Inks Inks Coating
Liquids Inks Coatings Sealant
Flexographic Inks Polyol Formulator Polish
Rotogravure Inks Flooring Adhesive
Packaging Inks PU Laminates  
Surface Coatings Metallic Inks Paints (Rare)
Polish – Wood Cigarette Packaging Any Solvent Based
Paper Coating (Cards) Wrapper (Non Food)  
Varnish    

PU Applications: Flooring, Construction & Wood

PU Applications: Pipe Coating: Water, Oil & Gas

PU applications Inks

Polyurethane based Inks
  • Pu Based inks are applicable on polyester, BOPP, Nylon, Cellophane & PVDC coated films.
  • PU based inks are suitable for solvent base/ solvent less/ PP Extrusion Lamination
  • PU based inks can be further classified in to three categories depending upon solvent system used
  • Toluene & MEK Based inks
  • Toluene Free Inks
  • Toluene & MEK Free Inks

PU applications Inks

  • PU Inks has Excellent Printability and Resolubility.
  • PU Inks has very good Adhesion on most of the substrate.
  • They are High speed Printing Inks.
  • PU Inks has very good Lamination Bond strength and extremely low Solvent Retention.
  • Suitable for Boil and Retort Application.

About Polyurethan (PU)

  • Developed by Otto Bayer in 1937
  • Produced as Elastomers, Foams, Coatings, Adhesives Fibers, Synthetic Leather etc
  • PU industry shown significant growth in adhesives and coatings
  • Normally consists of Polyol (Polyester or Polyether Type, Isocynate & additive
  • Property depends on Stoichiometric proportions of types of isocynates & polyols
  • Oldest Type are 1-component PU system based on di- or triisocyanates that cured by reacting with active hydrogen on substrate or moisture

About Polyurethane/PU

Before we get too Technical! Basic of Polyurethane (PU System)

It’s a 2 Component System – it needs two reactants to make a PU

  • PU can be Foam, Coatings, Adhesives, Fibers etc

When they say it is a 1 component system

  • Moisture (water) plays the part(role) of the POLYOL

There are different types of Polyols & Isocyanates

  • Choice of these different types determine the property of the final PU
  • The “Reactive Sites or Groups” in the Polyol & Isocyanate reacts to produce the PU

Before we get too Technical! Basic of Polyurethane (PU System)

Where does Ketonic Resin come into the picture

  • Ketonic resin can be mixed with Polyol and reacted with Isocyanate
  • KR can be made into solution (e.g.mixed in chloroform) and reacted
  • The solvent shall be needed to be removed by vacuum

Because KR has the same “Reactive Site/Group” as a Polyol

  • It blends easily with Polyol
  • It reacts easily with Isocyanate
  • It gives enhancement in the overall property of the PU
  • Basically its an additive which provides multiple benefits

PU Systems with Ketonic Resin

KR interaction with PU System

Polyurethane Resins

Resins such as Ketone Resin which contain hydroxyl groups are also used for modification of (for example PUR) binders. Our Ketone Resins “urethane grade” react easily with mono and di-isocyanates, such as HDI, TDI, MDI and IPDI. Different combinations of polyols and rnodifiedketone resin are used for ‘PUR system. Highly active hydroxyl group can react with isocyanate to improve the resistance to water, heat and corrosion. This technology is used In a wide variety of applications including indoor and outdoor floor coatings.

PU Systems with Ketonic Resin

KR interaction with PU System
  • Resins such as POLYTONE K 96 and POLYTONE K 97 contain a high level of hydroxyl groups that makes it particularly suitable for combined use with polyols and isocyanates in the formulation of bicomponent polyurethane systems (PU or PUR 2K).
  • Our Ketonic resins react easily with mono and di-isocyanates, such as HDI, TDI, MDI and IPDI.
  • The strong bond created by hydroxyl group and isocyanates guarantees a strong resistance to water, heat and corrosion.
  • This technology is used in a wide variety of applications including indoor and outdoor floors (for example : industrial plants, warehouses, garages, car parks, etc.) as well as roofs.
  • The almost infinite possibility of combining colours and patterns makes these systems particularly suitable for finishing floors in designer shops and houses, where the only limit is the designer’s imagination.

KR interaction with PU System

Benefits of KR in PU Systems

Ketonic Resin in Polyurethane
Why Use Ketonic Resin? What is the effect and/or How it imparts?
As a Carrier or Binder Links with Polyol and reacts with IsoCyanide
As Flow Modifier -OH Value reacts and increases viscosity
Corrosion Prevention Low Acid Value
Color Fastness Binding Property-Binds Pigment+Solvent
Adhesion, Gloss Improves Adhesion to substrate
Increase Solid Content Resin is solid
Leveling Inherent Property
Hardness Resin isInherent Property solid
Gloss KR inherent property of gloss is imparted
Thermal Resistance KR increases Thermal Resistance
Green or Build Up Strength KR increses
Reduce NCO% Excess IsoCyanide is consumed by KR

Characterisics – Effect On Formulation & End Product

KR products available

Which Product to Suggest
  • Most well known product has been BASF’s Synthetic Resin CA
  • Our POLYTONE K 94 is the direct equivalent of Synthetic Resin CA
  • The Hydroxyl Value (-OH Value) / Reactivity is 220-240
  • Our LOW reactivity grade is K 93LH
    • Low reactivity with Isocynates
    • Used more as binder
  • Our HIGH reactivity Grades are K 96/97, -OH Value upto 295
    • High Reactivity with Isocyanates
    • High Viscosity Changes, More Hardness

Characterisics – Effect On Formulation & End Product

Parameters K 92LH K 93 K 93LH K 90 K 94 K 95 K 96 K 97 K 96 HH K 97 HH
Physical Form Pearl Shaped Granules Pearl Shaped Granules Pearl Shaped Granules Pale Yellow lumps Pearl Shaped Granules Pearl Shaped Granules Pearl Shaped Granules Pearl Shaped Granules Pearl Shaped Granules Pearl Shaped Granules
  Low hydroxyl value grade Lump form Standard Grade High melting point grade High hydroxyl value grade
Softening point(Ball & Ring method)in deg c 70-90 (very low) 98-103 95-105 90-105 90-95 100-105 105-110 110-120 105-110 110-120 (very high)
Viscosity(B4 Ford Cup @ 25deg C)in sec(50% solution in spirit) 14-19(very low) 15-17 17-19 17-20 17-19 19-21 20-23 22-25 20-23 22-25(very high)
Hydroxyl Value(mg KOH/gm Resin) 170-200(very low) 265-285 170-200 170-220 200-220 230-250 230-250 230-250 270-295 270-295(very high)
Acid Value(mg KOH/gm Resin) <1 <1 <0.2% <1 <1 <1 <0.5% <0.5% <0.5% <0.5%

Any Queries/Questions

Email: sdutt@polyolsandpolymers.net
Cell: 0091 9824141616
Tweet: @polyolspolymers

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