| 摘要 |
<p>an expandable phenolic resin molding material which can be formed into a phenolic resin foam having an excellent strength, an improved brittleness, a higher pH value compared to a conventional one and a good corrosion resistance against a member with which the material is contacted; and a phenolic resin foal having these properties. An expandable resol-type phenolic resin molding material comprising a liquid resol-type phenolic resin, a foaming agent, a foam controlling agent, an additive and an acid curing agent, the foaming agent comprising an organic non-reactive foaming agent, and the additive comprising a nitrogenated cross-linked cyclic compound; and a phenol resin foam formed by foaming and curing the molding material.</p> |
