发明授权
US3769381A Production of microporous sheets 失效
生产微晶片

Production of microporous sheets
摘要:
MICROPOROUS SHEETS ARE PREPARED BY REACTING AN NCO TERMINATED PREPOLYMER WITH A DISECONDARY DIAMINE IN AN INERT SUBSTANCE THAT DISSOLVES THE REACTANTS BUT CAUSES ONLY SWELLING OF THE PRODUCT THEREOF AND DRYING THE DISPERSIONS THUS FORMED TO FORM MICROPOROUS FOILS.
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