Process for epoxy foam production

Details Process for epoxy foam production Process for epoxy foam production

2011-08-23

2011-08-23

Zemel, Irina S (Department: 1765)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S130000, C525S178000, C525S180000, C525S191000

Reexamination Certificate

active

08003730

ABSTRACT:
An epoxy resin mixture with at least one epoxy resin of between approximately 60 wt % and 90 wt %, a maleic anhydride of between approximately 1 wt % and approximately 30 wt %, and an imidazole catalyst of less than approximately 2 wt % where the resin mixture is formed from at least one epoxy resin with a 1-30 wt % maleic anhydride compound and an imidazole catalyst at a temperature sufficient to keep the maleic anhydride compound molten, the resin mixture reacting to form a foaming resin which can then be cured at a temperature greater than 50° C. to form an epoxy foam.

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Celina M., Novel foaming processes using CO2 generation from anhydride precursors. Polymer Preprints (American Chemical Society, Division of Polymer Chemistry) 2008;49-767.

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