Browse Publications Technical Papers 900732
1990-02-01

Polyurethane Foam Catalysts for Applications in Non-Staining Instrument Panels 900732

Today most instrument panels and interior padded parts are made of polyurethane foam covered with a polyvinyl chloride (PVC) skin. A key concern in the industry is the long-term appearance of the interior parts. Recent automotive designs have resulted in more pronounced windshield angles and increased surface areas of the instrument panel exposed to direct sunlight. A consequence of these design features is closed car interior temperatures approaching 250°F (1) (120°C). The resulting thermal and light stress causes many instrument panels to discolor and crack.
Previous studies have shown that vinyl staining is the result of dehydrochlorination of the PVC which is manifested as color changes as well as cross-linking of PVC, and foam degradation.
In this study, the results of heat aging tests at 300°F (149°C) indicate that colorimetric testing is a reliable and objective method of monitoring stain development. Using this procedure, it was seen that different catalysts in urethane foam formulations can dramatically affect the staining characteristics of vinyl surfaces.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Preview Document Add to Cart
Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

The Discoloration of Vinyl Instrument Panels by Polyurethane Foam Backing

910359

View Details

TECHNICAL PAPER

Developing the Thermoplastic Water Pump and Power Steering Pulley for a Passenger Car

980736

View Details

TECHNICAL PAPER

Fatigue Life Analysis of Automotive V-belt Pulley

2007-01-3729

View Details

X