| 配方类型： |
COATINGS |
| 配方说明： |
Fast Air Dry-Oiticica Oil Alkyd |
| 配方组成： |
Glycerin (High Gravity)/425.0 lb
500 Gallon Kettle Siz
Glycerine (High Gravity)/10.0%
Xylol/100.0 lb
Toluol/1935.0 lb
Yield
Ethyl Alcohol/215.0 lb
Yield/4500.0 lb or 540.0 gal
Glycerin (High Gravity)/17.0%
Litharge/Trace
Xylol/4% on above
Oiticica Oil/28.0%
Oiticica Oil/700.0 lb
Toluol/90.0%
Glycerine (High Gravity)/250.0 lb
Litharge/0.5 lb
Phthalic Anhydride/45.0%
Phthalic Anhydride/1125.0 lb
Ethyl Alcohol/10.0% |
| 配制方法： |
Cooking Instructions: Charge first two items into stainless steel kettle equipped with agitation and inert gas. Heat to 430'F and add the litharge. hold at 430'F until sample from kettle is compatible with methyl alcohol in a 1:3 ratio. This is called "Alcoholysis of Oil", and is an essential step in making an alkyd from the whole oil (triglyceride). It usually takes 45 minutes to 1.25 hours.
Next add phthalic anhydride, remainder of glycerine, and the xylol and change to a solvent cook. This means having an arrangement on your kettle similar to laboratory Dean and Stark tube that permits water of esterification to be taken off as the cook proceeds and Xylol returned back to kettle. In practice separator is filled 0.5 with water and 0.5 with xylol. By drawing off water from time to time and keeping water level constant-Xylol content in cook remains constant.
Gradually increase heat on solvent cook to 340'F where initial reflux starts. At this point shut off inert gas and gradually increase heat to 3 |
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