Impact resistant resins and method for making the same

US4543383A · kind A · utility

Assignee

• Rohm Co., Ltd. · JP

Inventors

• Ernst Heil · Riedstadt, DE
• Franz Wenzel · Darmstadt, DE
• Peter J. Arndt · Seeheim-Jugenheim, DE
• Walter Schellhaas · Zwingenberg, DE

Key dates

• Filing date: Dec 21, 1984
• Grant date: Sep 24, 1985
• Expiry date: Dec 21, 2004

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S525/902
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

What are disclosed are a continuous emulsion polymerization method for making an aqueous dispersion of an impact resistant resin, adaptable to use as a component of impact resistant polymethacrylate forming masses, by first emulsion polymerizing a first monomer component onto core particles of a seed latex until a degree of polymerization of said monomers from 80 to 95 percent is attained, whereby an intermediate product comprising said core particles covered with a rubbery polymer phase is obtained, and then emulsion polymerizing a second monomer component onto the particles of said intermediate product to form a shell of harder polymer on the particles of said intermediate product, and impact resistant resin products made by this method.