| 配方类型： |
RUBBER, RESINS, PLASTICS, AND WAXES |
| 配方说明： |
Low density Nonshrinking Foamed Urethane |
| 配方组成： |
*diethylethanolamine/42
HCl (36.5%)/24
Distilled Water/34
Adjust pH to 9.8
Charge the castor polyol into a three-neck, one-liter flask fitted
with a stirrer, thermometer and condenser with drying tube attached.
Slowly add the tolylene diisocyanate to the charge with moderate
agitation over a thirty minute period. then heat the reactants to the
prescribed temperature for one hour. Cool to 65'C. and package in 1 qt.
tinned cans.
Foam Formulation Formul
"Flexricin" 20/-
Water Content 49.1%
"Flexricin" 9/276
DB Castor Oil/-
Tolylene Diisocyanate 80/20/324
Prepolymer/100.00
Reaction Temperature/130'C
Dimethyl siloxane "Dow-Corning" DC-200/.50
"Flexricin" 15/-
Buffered Diethylethanolamine*/4.40
Distilled Water/1.15
"Estynox" 300/- |
| 配制方法： |
Laboratory Procedure for Foam Preparation: The dimethyl siloxane is hand mixed into the prepolymer. To this mixture is added the buffered diethylethanolamine together with the water. The blend is manually mixed to a point where incipient foaming becomes observable (about 45 seconds) after which it is poured into a waxed paper container to foam. The foam is allowed to cure at room temperature. |
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