Maro Publications

Polystyrene (PS) Copolymers

Patents with Abstracts


Maro Topics


Patents with Abstracts

2. 8,258,244 
Process for production of thermoplastic copolymer
Yamashita and Takamura of Toray Industries, Japan, produced a thermoplastic copolymer, to a loop reactor continuously to produce a copolymer (A), the monomer mixture (a) comprising an aromatic vinyl monomer (a1), a vinyl cyanide monomer (a2) and an N-substituted maleimide monomer (a3). The process enables the production of a thermoplastic copolymer which has an excellent balance among physical properties such as heat resistance, color and flow property, reduces the amount of bleeding that may cause mold staining during molding processing and has excellent handleability and productivity. (RDC 9/22/2012)

1. 8,242,207 
Styrene/anhydride polymeric material and graft having enhanced properties
Dufaure  et al of Arkema France and the Centre National de la Recherche Scientifique, France, developed polystyrene grafted by nitrogen-containing heterocyclic groups where the  grafted agent is attached by at least one covalent bond.  The grafting agent consists, in a single molecule, one or more associative groups capable of being bound by hydrogen bonds, and one or more reactive groups capable of forming covalent bonds with the polymeric backbone, at least one of the associative groups of the modifier is an imidazolidone heterocyclic ring.  The polymeric material of the invention can also be blended with other materials such as other polymers, and can thus be modified by elastomeric phases that enhance the impact strength. (RDC 8/30/2012)


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(RDC 6/5/2012)


Roger D. Corneliussen

Maro Polymer Links
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Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen

** Date of latest addition; date of first entry is 8/30/2012.