Poly(phenylene ether) articles and compositions

摘要

A composition useful for the injection molding of fluid engineering parts includes specific amounts of a high molecular weight poly(phenylene ether), a polystyrene, and glass fibers. The composition provides improved hydrostability and reduces or eliminates the butadiene monomer that is present in comparative compositions containing rubber-modified polystyrene. Fluid engineering articles prepared from the composition are described.

主权项

1. A fluid engineering article comprising a composition consisting of:
about 25 to about 50 weight percent of a poly(phenylene ether); about 25 to about 55 weight percent of a polystyrene comprising an atactic homopolystyrene having a number average molecular weight of 30,000 to 100,000 atomic mass units; about 5 to about 35 weight percent of glass fibers; and optionally, up to 10 weight percent of additives selected from the group consisting of stabilizers, mold release agents, lubricants, processing aids, drip retardants, nucleating agents, UV blockers, dyes, pigments, antioxidants, anti-static agents, blowing agents, mineral oil, metal deactivators, antiblocking agents, and combinations thereof; wherein the poly(phenylene ether) has a weight average molecular weight of at least 70,000 atomic mass units after being compounded with the polystyrene and the glass fibers; wherein the composition comprises less than or equal to 1 milligram butadiene per kilogram of composition; and wherein all weight percents are based on the total weight of the composition, unless a different weight basis is specified.