RUBBER-MODIFIED AROMATIC MONOVINYL POLYMER RESIN COMPOSITION

• Main Authors: TOSHIMA MASAO, TOHARA AKIHITO
• Format: Patent
• Language: English
• Published: 12.07.1985
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

PURPOSE:The titled composition having an excellent total quality balance among colorability, impact strength, gloss, and rigidity, prepared by dispersing rubber- like substance particles containing a high-cis-polybutadiene and characterized by an internal structure in a resin phase. CONSTITUTION:The titled composition in which the rubber-like substance comprises a polybutadiene containing at least 50wt% high-cispolybutadiene containing 90mol% or above cis-1,4-bonds; the rubber-like substance is dispersed in the form of particles in a resin phase of an aromatic monovinyl polymer, its average particle diameter is 0.5-1.6mu, and its particle diameter distribution is 1.1-2.0; its particle contains aromatic monovinyl polymer particles in its interior, and at least 80% of the particles have a diameter <=0.3mu; and the index of swelling, in toluene, of the dispersed rubber-like substance containing this aromatic monovinyl polymer in its interior is in the range of 7-12, and which is obtained by dissolving the rubber-like substance in the aromatic monovinyl monomer and polymerizing the mixture.