| 摘要 |
<p>The invention offers (meth)acrylic crosslinked fine particles, with excellent thermal resistance, which are suitably used as, for example, an anti-blocking agent or another additive in food packaging material and a method of manufacturing such particles. The invention involves (1) suspension polymerization of a monomer composition containing methyl methacrylate or another (meth)acrylic monomer using a lauroyl peroxide or another organic peroxide (polymerization initiator) and (2) aging of a polymerized product obtained in the polymerization at a temperature of from 80 DEG C to 95 DEG C for at least 1.5 hours. Hence, (meth)acrylic crosslinked fine particles with a crosslinking structure can be obtained which contain a residue of the (meth)acrylic monomer at a concentration not more than 2000 ppm and start thermally decomposing at a temperature not less than 260 DEG C and which more preferably have an average diameter of from 0.1 mu m to 500 mu m.</p> |
