| 摘要 |
<p>PURPOSE:A releasing agent, consisting of polybutene and/or hydrogenated polybutene, having improved releasability, and without the toxicity even with a small amount remaining on the surface of a capsule nor causing the tackiness, and useful for preparing a capsule without requiring the washing step. CONSTITUTION:A releasing agent, consisting of polybutene and/or hydrogenated polybutene, preferably of 100-500, particularly 100-280, number-average molecular weight, and very useful for preparing a capsule agent in medicines or foods. The above-mentioned polybutene is prepared by polymerizing a residue after extracting butadiene from a 4C fraction in cracking naphtha as a raw material in the presence of aluminum chloride catalyst at 5-130 deg.C under 1-22kg/ cm<2>. The hydrogenated polybutene is obtained by further hydrogenating the resultant polybutene in the presence of an Ni, Pd type catalyst.</p> |
