PRODUCTION OF MODIFIED EPOXY COMPOSITION

• Main Authors: SATO HOZUMI, MATSUNAGA TATSUAKI, MIYAMURA TOSHIO, IWANAGA SHINICHIRO
• Format: Patent
• Language: English
• Published: 05.02.1991
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

PURPOSE:To obtain the subject composition, excellent in bonding strength, etc., and suitable as semiconductor sealing media by coagulating a partially crosslinked rubber-like random copolymer latex, regulating the residual volatile content to a specific value, then adding and dispersing the regulated latex in an epoxy group-containing compound and removing the residual volatile substances. CONSTITUTION:A coagulant is added, etc., to coagulate a latex of a partially crosslinked rubber-like random copolymer (e.g. prepared by copolymerizing divinylbenzene, etc., with butadiene, etc., and/or acrylic acid, etc.) and the residual volatile content is regulated to 5-60wt.% by centrifugal dehydration, etc. The resultant coagulated copolymer is then added and dispersed in an epoxy group-containing compound and the residual volatile substances are removed (preferably to <=0.1wt.%) by vacuum drying, etc., to efficiently produce the objective composition containing rubber-like particles homogeneously dispersed in the form of particles in the epoxy compound.