MATAPEL UNIPOL UR pigment pastes illustrated in this Technical Service Card were specially selected because of their suitability for the coloration of flexible, semi-rigid, rigid, and integral skin polyurethane foams, either polyether or polyester systems. They distinguish themselves through:
• GOOD HEAT RESISTANCE
No discoloration despite prolonged reaction heat encountered in this application.
• GOOD MIGRATION RESISTANCE
No staining on upholstery or PVC leather cloth.
• RESISTANCE TO DRY CLEANING AND STAIN REMOVERS
• DISPERSION STABILITY OF PIGMENT PASTES
Usually pigment pastes are diluted to meterable viscosity with polyol just before use. The pigments which we recommend are all of organic origin and have correspondingly low specific gravity.
An agitator in the color storage tank is quite sufficient to prevent the diluted pigment pastes from settling.
• CARE OF FOAM PRODUCTION EQUIPMENT
All on the UNIPOL UR pigment products recommended are of soft texture and do not cause abrasion, for example, in the expensive metering pumps or in the mixer.