Patent ID: 11104753

Abstract:
The purpose of the present invention is to provide an organic polymer fine particle which can be hardly fallen off from a film when used as an anti-blocking agent for a film. The organic polymer fine particle according to the present invention is characterized in comprising a (meth)acrylate polymer crosslinked by a bifunctional crosslinkable monomer and a hindered phenol antioxidant or a component derived therefrom, wherein a ratio of a structure unit composed of the bifunctional crosslinkable monomer in the (meth)acrylate polymer crosslinked by the bifunctional crosslinkable monomer is 5 mass % or more and 35 mass % or less, the sedimentation start time is 16 seconds or more, an amount of Al measured by a high-frequency inductively coupled plasma emission spectrometric analysis method is 1 ppm or less, and an amount of a sulfur atom measured by a high-frequency inductively coupled plasma emission spectrometric analysis method is 300 ppm or less in the organic polymer fine particle.