Unilink Liquid secondary aromatic diamines are known for their slow reactivity, low toxicity, and ease of use.
Its use results in the general improvement of the polymer strength - in terms of tensile strength tear and elongation properties.
Unilink Diamines find wide application in many polyurethane and polyurea systems. Its ability to be incorporated in additional urea groups as compared to a primary hydroxyl enables it to bring superior strength and load bearing performance to standard HR flexible foams- often at lower foam density and improved strength and dimensional stability to PUR and PIR rigid foam systems.

In non-cellular applications, Unilink diamines can provide a range of very hard or very soft polymers with extended pot life, improved heat resistance, and cold temperature properties. Addition of Unilink diamine can also lower surface tension of the uncured polymer system to enhance substrate wetting, flow adhesion. Room temperature cured coatings, sealants and elastomers can all be cured effectively with Unilink diamines as well as fast polyurethane and polyurea spray formulations.

Applications of UOP Unilink Additives
Flexible slabstock foams-3 to 5 phr Unilink 4200 especially for HR,CMHR and polyester.

• Reduction in foam density
• Improved hardness, improved load bearing properties
• Increased Tensile, Tear and Elongation

Cold Molded Foams - 1 to 3 phr Unilink 4200

• Reduction in Foam density
• Improved IFD (harder TDI foams. softer MDI foams)
• Increased tensile, tear and Elongation
• Improved flow

Rigid PUR and PIR Foams - 3 to 5 phr Unilink 4200

• Improved dimensional stability
• Increased compressive strength
• Lower friability
• Improved flow and adhesion
• Improved insulation values

MDI Elastomers - Unilink 4100 recommended

• Increased strength and heat resistance compared to diol cures
• Low viscosity improves handling and processing
• Tough,hard (80D) elastomers available

TDI Elastomers - Unilink 4230 recommended

• Best for soft polymers (<80A) and hard polymers (>55D)
• Long pot life, softer cure than MbOCA
• Excellent low hardness(<60A) elastomers available

Adhesive, Sealants and Coatings

• Longer pot life compared to other diamine
• Improved adhesion and flow through better surface wetting
• Improved cold temperature properties
• Improved Impact and Chip resistance

Spray Polyurea Elastomers and Coatings

• Delayed gel times
• Improved adhesion
• Improved impact resistance
• Improved cold temperature properties

Products

UNILINK 4100.190903 Request Information UNILINK 4200.190903 Request Information UNILINK 4230.101103 Request Information