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    配方类型: RUBBER, PLASTICS, WAXES
    配方说明: Effects of Catalyst on Properties of "PAPI" Foam
    配方组成: Fluorocarbon 11/45.0
    Tetramethylbutanediamine
    N-Methylmorpholine
    Silicone L-520/3.0
    Rise time (min-sec)
    "PAPI"/139.0
    Density (pcf)
    compressive strength
    psi at 2.5% deflection
    Catalyst/As shown
    $G: Tetramethylguanidine
    "Pluracol" PEP-450/100.0
    Trimethylpiperazine
    配制方法: various urethane catalysts can be used with "PAPI." In a "Pluracol" PEP-450/"PAPI" foam, the longest rise time and the weakest foam will be obtained with the weaker catalysts, such as N-methylmorpholine, even though large amounts are used. The shortest rise time and the strongest foam can be obtained with the stronger catalysts such as N,N,N',N'-tetramethyl-2,3-butanediamine. Satisfactory foams can also result from other catalysts when allowance is made for the slower reactivity of "PAPI."

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