| 摘要 |
<p>A gas-generating agent obtained by combining (A) a nitrogen-containing compound (such as compounds containing a urea bond such as urea and hydrazodicarbonamide) that produces ammonia gas when heated, (B) a nitrite, and (C) hydrotalcite is mixed with a synthetic resin material or a rubber material to obtain a foaming composition, which is then heated and shaped into a foamed body. Thus, nitrogen gas can be generated while suppressing the generation of ammonia or nitrous acid gas, thereby making it possible to obtain a foamed body having uniform, fine gas bubbles and a high degree of whiteness and a high scaling ratio.</p> |
