Maro Publications

Toughened Plastics

Patent Abstracts

from 4/20/2013

Maro Topics


Patent Abstracts


2, U.S. Patent 8,536,248 (September 17, 2013), “Reinforced Thermoplastic Resin Composition and Molded Article,” Masahito Nakamoto, and Koichi Tezuka (UMG ABS, Ltd., Japan).

Acrylonitrile butadiene styrene (ABS) resins and polycarbonate resins/ABS resins reinforced with inorganic fillers have been used for electronic housings such as laptop personal computers, liquid crystal projectors and portable devices fabricated by injection molding.  These housings must have not only high rigidity and impact resistance, but also high drop impact resistance.  Nakamoto, and Tezuka developed reinforced thermoplastic materials with adequate drop resistance consisting of: 50 to 90 wt% polycarbonate resin; 10 to 50 wt% of a graft copolymer and 6 to 22 parts by weight of an inorganic filler..  The graft copolymer is prepared by graft-polymerizing an aromatic alkenyl  and a vinyl cyanide onto a rubber polymer; This material shows excellent moldability, improved stiffness and improved drop impact resistance.


1. U.S. Patent 8,524,826 (September 3, 2013), “Transparent Chemical Resistant Impact Acrylic Alloy,” Leslie A. Cohen, and Florence Mehlmann (Arkema France, Colombes, France

Acrylic alloys are especially useful in bio-pharmaceutical and medical applications.  However these applications need resistance to isopropyl alcohol, lipids and impact.  Acrylic materials tend to have low impact strength or brittleness with marginal chemical resistance to medical  agents.  Cohen and Mehlmann developed transparent acrylic materials with excellent chemical and impact resistance.  The acrylic alloy consists of a melt blend of a high molecular weight acrylic copolymer, 1 to 5 wt% polyvinylidene fluoride (PVDF), 40 to 55 wt% impact modifiers and other additives. The PVDF resin gives improved toughness and chemical resistance as well as improved transparency.


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(RDC 6/5/2012)


Roger D. Corneliussen

Maro Polymer Links
Tel: 610 363 9920
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Copyright 2013 by Roger D. Corneliussen.
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** Date of latest addition; date of first entry is 4/20/2013.