Polyester

ULTRACAST™ 200-series is a filled, liquid polyester resin which, when reacted with the isocyanate ULTRATHANE 500-247, yields high quality urethane elastomers of Shore A hardness 30 to 55. The system is readily processable by conventional batch mixing techniques. The system is highly satisfactory for the production of applicator rollers used in the application of solvent based paints and inks.

ULTRACAST™ 200- series  shows certain advantages over conventional urethane prepolymers when processed in rollers.

The advantages are:

• an uncomplicated two part system that avoids the addition of fillers and plasticisers to achieve low Shore hardnesses
• hardness variations from 30A to 55A that are easily achieved by varying the ULTRATHANE 500-247 ratio
• pot life or pouring time that can be easily varied by the addition of small amounts of catalyst in the form of ULTRACAT 650 CC

The system has many features which lend themselves to the production of various rollers, including can coating, metal decorating and plywood coating rolls. 

These features are:

• high resistance to solvents present in printing inks, coatings and cleaning solutions
• easy machine-ability resulting in extremely smooth surfaces
• easy cleaning of rollers due to low surface porosity of the polyurethane

ULTRACAST™ 10E series  is a toluene diisocyanate (TDI) terminated urethane prepolymer. The prepolymer is capped to reduce the TDI monomer content to an absolute minimum. ULTRACAST™ 10E series  utilizes a polyester as the predominant backbone polymer which ensures acceptable physical properties at various Shore hardnesses.

ULTRACAST H-series  is a urethane prepolymer based on a polyester and toluene diisocyanate (TDI). The product is "capped" and contains a minimum of TDI monomer. ULTRACAST HE-series  may be classified as an extremely high performance material and yields elastomers of various  Shore A hardness  when reacted with MBCA. Combinations of the prepolymer with diols and triols produces softer elastomers with good physical properties.