| 摘要 |
Outdoor storage piles of a particulate solid commodity are protected from the weather by a novel, open celled, shrinkage controlled, water absorbing sponge blanket applied to the pile in a rainwater protecting thickness, and a method for producing said sponge blanket employing an aminoplast resin prepared from urea formaldehyde or a prepolymer of urea and formaldehyde and modified with 4 to 12% fructose, and a suitable foaming agent containing an acid accelerator, such as phosphoric acid in a ratio of 2% by weight of resin.
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