Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1996-07-03
1999-10-12
Woodward, Ana
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524413, 524423, 524442, 524449, C08K 334, C08K 704
Patent
active
059656557
ABSTRACT:
This invention is directed to an improved thermoplastic molding composition having an admixture of thermoplastic polymer or blends thereof and a particular mineral additive having needle like particles and a high aspect ratio of length to diameter. The composition when molded with the final article has improved surface characteristics, even a Class A surface, a lower coefficient of thermal expansion, as well as other improved properties, particularly impact as determined by Dynatup testing. The mineral additive can range from 5 to 70 weight percent. The polymer portion can be a copolyetherimide ester, a copolyether ester, an aromatic polycarbonate, a rubber modified homopolymer, or copolymer of a vinyl aromatic monomer, a polyphenylene ether, a polyamide, and blends thereof or blends with other polymers. The preferred mineral additive is calcium meta silicate, also known as wollastonite.
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Plastics Technology--Jul. 1992; "Fillers--Making RIM Look Good" by Richard Monks.
Liu Nan-I
Mordecai Woodie D.
Yates John B.
General Electric Company
Woodward Ana
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