| 配方类型： |
RUBBER, PLASTICS, WAXES |
| 配方说明： |
Humid Aging Characteristics of "PAPI" Foams |
| 配方组成： |
$G: "Pluracol" PEP-450
"QUADROL"
"Quadrol"/as shown below
"PAPI"
Triethylamine/1.0
Rise time (min-sec)
Density before aging
(pcf)
Volume change (%)
Weight change (%)
Density after aging
"Dow Corning" 113/3.0
(pcf)
Fluorocarbon 11/60.0
Compressive strength
After aging
psi at 7.5%
deflection
"Pluracol" PEP-450/as shown below
"PAPI"/as shown
Tetramethylguanidine/3.0 |
| 配制方法： |
With the resin system shown, using "Pluracol" PEP-450, increasing the amount of "Quadrol" will improve the humid aging characteristics of the resulting foam. The volume swell after exposure for seven days at 100% relative humidity at 158'F will decrease from 15.4 to 0% as the amount of "Quadrol" is increased from 0% to 40% by weight, and the final strength of the foam will be slightly increased. The content of closed cells and probably retention of the "K" factor are improved with 20% to 30% "Quadrol." |
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