The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 24, 1981
Filed:
Oct. 17, 1979
Robert HM. Simon, Longmeadow, MA (US);
Monsanto Company, St. Louis, MO (US);
Abstract
The process relates to a continuous mass polymerization process for ABS polyblends wherein a monomer formulation of monoalkenyl aromatic and alkenyl nitrile monomers having a conjugated diene rubber dissolved therein is continuously charged to a first, stirred reaction zone operating at a steady conversion of said monomers of about 5 to 45% forming a partially polymerized first mixture having said rubber dispersed as grafted rubber particles, followed by continuously polymerizing said first mixture in a second stirred reaction zone by substantial linear flow polymerization under evaporative cooling of said monomers to a second partially polymerized mixture containing about 50 to 90% of ABS polyblend solids and separating said solids from said second mixture as an ABS polyblend.