Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1992-02-18
1993-12-28
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521 54, 521 92, 521 94, 521 95, 521104, 521128, 521129, 521135, C08J 908, C08J 910
Patent
active
052740064
ABSTRACT:
The present invention provides a foamable epoxy resin composition (A) 100 parts by weight of a liquid epoxy resin (B) 0.5-20 parts by weight of a latent curing agent, (C) 0.5-15 parts by weight of a foaming agent having a decomposition temperature of 100.degree.-220.degree. C., (D) 0.05-5 parts by weight of a surface active agent and (E) 10-200 parts by weight of a rubbery elastomer or a powdery halogen-free thermoplastic resin of 150 .mu.m or less in average particle diameter, which composition has a melt viscosity of 2.5.times.10.sup.3 -5.times.10.sup.4 dPa.multidot.s at the decomposition temperature of said foaming agent. The composition can provide a foamed material of rigidity and good heat resistance, having an expansion ratio of 5 times or more and a dense cell structure of 0.5 mm or less in average cell diameter.
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World Patents Index AN-79-62056B (JP-54-086562).
World Patents Index AN-80-80033C (JP-55-125126).
World Patents Index Latest AN-82-72981E (JP-57-117542).
Kagoshima Yutaka
Kobayashi Takeo
Mikuni Takamitu
Nagase Toshio
Foelak Morton
Nippon Zeon Co. Ltd.
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