Process for preparing low density porous cross-linked...

Details Process for preparing low density porous cross-linked... Process for preparing low density porous cross-linked...

C - Chemistry, Metallurgy

08

F

C08F 2/32 (2006.01) C08J 9/28 (2006.01)

Patent

CA 2136534

2136534 9324535 PCTABS00028 A process for the preparation of a low density porous cross-linked polymeric material comprises polymerizing a water-in-oil emulsion and reducing the polymerization and cross-linking time of the monomers without adversely affecting polymer properties or substantially affecting the emulsion by carrying out the curing in multiple-stages. Thus, the emulsion is first pre-cured at a temperature of less than 65 ·C until the emulsion reaches a rheometrics dynamic shear modulus of at least 500 pascal and then cured by heating at a temperature above 70 ·C.

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