PRODUCT INFORMATION

URETHANES FOR ELASTOMERS, COATINGS AND RIGID FOAM APPLICATIONS

Urethane polymer is a result of the reaction of hidroxyl groups (OH) in polyols with isocyanate groups (NCO) in polyisocianates or prepolymers. Castor oil has three hidroxyl groups and reacts with di or polyisocianates to form crosslinked urethane systems (elastomers coatings, binders, etc)

Multiple use polyols derived from castor oil are available for use in urethane reactions. These polyols differ chemically from the polyester and polyether polyols used in the preparation of urethanes. They have fewer ester groups than polyesters, contain no ether linkages as found in polyethers and are therefore more hydrolytically stable than the other polyols.

The ricinoleate polyols exibt excepcional pigment-wetting ability.

Their pigment and dye carryng capacity is used for efficient color incorpotation. Furthermore, low shear is required when making such disppersions, offering optimum production efficiency.

Proquinor´s identification for its urethane polyols is GARICINâ followed by a number.

GARICIN POLYOLS

Garicinsâ are hydroxyl terminated polyols and are used to formulate coatings with the following properties.

High for 100% solids at low viscosities, outstanding water resistence, durability, superior color retention, high impact and abrasion resistance, high initial and retained gloss, abitlity to adhere to a variety of substrates, good resistance to alkalis and acids, lubricating oils, ozone, cold check and weathering. The coatings are characterized by na unusual combination of extreme hardness and flexibility.

Uses for GARICINâ polyol-based urethanes include coatings for buses, trucks and railways cars, aircraft finishes, marine and maintenance coatings (concrete and metal tanks, bridges, etc.) plastic parts and equipment housings as well as traditional uses such as wood and leather finishes.

Urethane foams made with these GARICINâ polyols are stronger than those made with castor oil. Because their hydroxyl content, a larger amount of polyglycols could be incorporated in foam formulations.

The rigid urethane foams prepared with GARICINâ polyols meet the best requirements of density, compression strength and dimensional stability.