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    Process of making low density syntactic foams
    41.
    发明授权
    Process of making low density syntactic foams 失效
    制造低密度合成纤维的方法

    公开(公告)号：US3849350A

    公开(公告)日：1974-11-19

    申请号：US36768073

    申请日：1973-06-06

    Applicant: ATOMIC ENERGY COMMISSION

    Inventor： MATSKO J

    IPC: C08J9/32 ,  C08G53/08 ,  C08J1/14

    CPC classification number: C08J9/28 ,  C08J9/32 ,  C08J2201/0482 ,  C08J2363/00

    Abstract: DRAWING

    1. A PROCESS FOR PREPARING A LOW CONTENT AND LOW DENSITY SYNTACTIC FOAM PRODUCT COMPRISING MIXING AN EPOXY BINDER RESIN, A FLEXIBILIZER RESIN AND A CURING AGENT TO FORM A FIRST MIXTURE COMPRISING FROM ABOUT 5 TO ABOUT 10 WEIGHT PERCENT OF THE FINAL PRODUCT, AGITATING SAID FIRST MIXTURE, ADDING SUFFICIENT SOLVENT IN A PROPORTION OF FROMABOUT 200 MILLILITRES TO ABOUT 550 MILLILITRES SOLVENT PER 100 GRAMS OF SAID FINAL PRODUCT TO SIAD FIRST MIXTURE DURING SAID AGITATION TO PROVIDE A HIGHLY FLUID STATE SECOND MIXTURE, AND WHILE FURTHER AGITATING, ADDING HOLLOW MICROSPHERES TO SAID SECOND MIXTURE, POURING SAID SECOND MIXTURE SAID HOLLOW MICROSPHERES INTO A PRECOOLED RECEPTACLE TO DEPTH NOT GREATER THAN 1/2 INCH, THEREAFTER FREEZING SAID SECOND MIXTURE, SUBLIMING SAID SOLVENT FROM SAID SECOND MIXTURE WHILE MAINTAINING SAID FROZEN CONDITION, SAID SUBLIMATION YIELDING A DRY PRODUCT, CORPRESS ING SAID DRY PRODUCT AT FROM ABOUT 90 TO ABOUT 200 POUNDS PER SQUARE INCH AND CURING SAID COMPRESSED DEY PRODUCT YIELDING A SYNATACTIC FOAM PRODUCT HAVING A DENSITY OF FROM ABOUT 0.202 TO ABOUT 0.409 GRAMS PER CUBIC CENTIMETER AND A HOLLOW MICROSPHERE TO RESIN WEIGHT RATIO OF FROM ABOUT 90 T0 10 TO ABOUT 95 TO 5.

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