配方类型:

ELASTOMERS, POLYMERS, AND RESINS

配方说明:

Water-Dispersible Epoxy Ester Vehicle

配方组成:

molecular weight linear epoxy resins by reaction with bisphenol A.
Sodium Carbonate/0.5 g
Bisphenol A/58.0 g
Phthalic Anhydride/140.0 g
Butyl "Cellosolve"/155.0 g
"Acintol" FA-2/200.0 g
"Epon" 829*/242.0 g
*A precatalyzed liquid epoxy resin that can be converted to high

配制方法:

Charge the first two items to a one-liter three-neck round-bottom flask equipped with a thermometer, inert gas line, and stirrer. Heat the contents of the flask under a nitrogen blanket to the exotherm temperature (250-280 F). Turn the heat off at this point and after the exotherm is expended hold the reaction at 350-375 F for 0.5 h. Add the "Acintol" FA-2 tall oil fatty acids and sodium carbonate and heat the batch to 500 F. Hold this temperature until an acid number less than one is attained in the reaction mixture. Allow the batch to cool to 370 F and then add the phthalic anhydride. Hold 360-370 F for 15-20 min to allow the half ester of the phthalic anhydride to be formed, then quench the batch to 80% N.V. with butyl "Cellosolve" and discharge it from the reaction flask.
This vehicle should attain the following approximate physical properties: Visc. (Gardner-Holdt)---Z6 N.V.---80% Solution Acid No.---70 Color (Gardner 1963)---4-5