Nippon Chemical Industrial Co., Ltd.

Ryohei Imamura

Yutaka Kinose

Toru Hata

Eriko Okuno

Akinori Inoue

The red phosphorus base flame retardant for an epoxy resin is provided, which has red phosphorus particles coated with a thermosetting resin containing an anhydrous zinc compound. The coated red phosphorus has properties that a slurry having the coated red phosphorus dispersed in 10% by weight into water at 20&#xb0; C. has an electric conductivity of 30 &#x3bc;s/cm or below, the slurry having been left standing at 80&#xb0; C. for 20 hours has an electric conductivity of 150 &#x3bc;s/cm or below, and when 80 ml of water is added to 8 g of the coated red phosphorus and heated at 80&#xb0; C. for 20 hours, a concentration of POions eluted is 10 ppm or below.

RED PHOSPHORUS-BASE FLAME RETARDANT FOR EPOXY RESINS, RED PHOSPHORUS-BASE FLAME RETARDANT COMPOSITIONS THEREFOR, PROCESSES FOR THE PRODUCTION OF BOTH, EPOXY RESIN COMPOSITIONS FOR SEALING FOR SEMICONDUCTOR DEVICES, SEALANTS AND SEMICONDUCTOR DEVICES

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Tokyo, Japan

Ryohei Imamura