Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1989-10-10
1992-01-28
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524458, C08K 300
Patent
active
050844954
ABSTRACT:
Impact resistant compositions are prepared by the incorporation of acrylic rubber particles (or multi-stage emulsion polymer particles containing a rubbery layer) in a predominantly methyl methacrylate matrix. The emulsion particles are prepared in water as a latex stabilized with anionic groups. The particles are transferred to a methyl methacrylate medium by destabilizing the latex with a quaternary ammonium salt and optionally a di- or multivalent inorganic salt. Impact resistant compositions are prepared by separating the water from the methyl methacrylate layer and polymerizing the methyl methacrylate.
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K. E. J. Barrett and/M. W. Thompson, "The Preparation of Polymer Dispersions in Organic Liquids", Chapter 5, pp. 201-205 and 240-241, Dispersion Polymerization in Organic Media, Wiley, Imperial Chemical Industries (1975).
Cutter Louis A.
Godfrey John J.
Aristech Chemical Corporation
Krayer William L.
Mulcahy Peter
Schofer Joseph L.
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