公开(公告)号：US4677026A

公开(公告)日：1987-06-30

申请号：US885083

申请日：1986-07-14

申请人： Toshikazu Hamamoto ,  Motojirou Aoi ,  Kozaburo Yoshida ,  Yasuhiko Toda

发明人： Toshikazu Hamamoto ,  Motojirou Aoi ,  Kozaburo Yoshida ,  Yasuhiko Toda

IPC分类号： C01F5/02 ,  C08K3/22 ,  C08K9/02 ,  C09C1/02 ,  H01B3/10 ,  H01B3/40 ,  H01B7/282 ,  H01B7/29 ,  B32B9/00 ,  B05D7/00

CPC分类号： C08K3/22 ,  C01F5/02 ,  C08K9/02 ,  C09C1/028 ,  H01B3/10 ,  H01B3/40 ,  H01B7/282 ,  H01B7/29 ,  C01P2004/84 ,  Y10T428/2993

摘要： Disclosed is a resin composition for sealing electronic parts, which comprises a thermosetting resin and, incorporated therein, high-purity magnesium oxide. A hydration-resistant magnesia powder having the particle surfaces covered with a continuous and uniform coating of silica is advantageously used as the magnesium oxide. This hydration-resistant magnesia powder is prepared by introducing a heated vapor of an organic silicate compound into a reactor of a fluidized bed of magnesia powder heated at 100.degree. to 600.degree. C. so that the concentration of the organic silicate compound is 1 to 20 mole %, and precipitating a coating of silica on the surfaces of magnesia particles by thermal decomposition and/or hydrolysis of the organic silicate compound on the surfaces of magnesia particles.

公开(公告)号：US4766162A

公开(公告)日：1988-08-23

申请号：US34439

申请日：1987-04-03

申请人： Toshikazu Hamamoto ,  Motojirou Aoi ,  Kozaburo Yoshida ,  Yasuhiko Toda

发明人： Toshikazu Hamamoto ,  Motojirou Aoi ,  Kozaburo Yoshida ,  Yasuhiko Toda

IPC分类号： C01F5/02 ,  C08K3/22 ,  C08K9/02 ,  C09C1/02 ,  H01B3/10 ,  H01B3/40 ,  H01B7/282 ,  H01B7/29

CPC分类号： C08K3/22 ,  C01F5/02 ,  C08K9/02 ,  C09C1/028 ,  H01B3/10 ,  H01B3/40 ,  H01B7/282 ,  H01B7/29 ,  C01P2004/84 ,  Y10T428/2993

摘要： Disclosed is a resin composition for sealing electronic parts, which comprises a thermosetting resin and, incorporated therein, high-purity magnesium oxide. A hydration-resistant magnesia powder having the particle surfaces covered with a continuous and uniform coating of silica is advantageously used as the magnesium oxide. This hydration-resistant magnesia powder is prepared by introducing a heated vapor of an organic silicate compound into a reactor of a fluidized bed of magnesia powder heated at 100.degree. to 600.degree. C. so that the concentration of the organic silicate compound is 1 to 20 mole %, and precipitating a coating of silica on the surfaces of magnesia particles by thermal decomposition and/or hydrolysis of the organic silicate compound on the surfaces of magnesia particles.