General Electric Company

Eileen B Walsh

Angelika H Clark

Robert Russell Gallucci

Lawrence R Wallace

Dennis W Champlain

Joel D Allen

Ronald Dale Courson

Blends of low molecular weight PBT resin and high molecular weight polyester resin, such as high molecular weight PBT resin, are imparted with excellent melt viscosity stability by the addition of certain phosphorus-containing compounds.

Stabilization of low molecular weight polybutylene

A highly filled, extruded thermoplastic material which has a smooth, uniform speckled surface without any secondary finishing operations. The thermoplastic material contains a polyalkylene terephthalate resin, a polycarbonate resin, a large quantity of a filler material, a stabilizer for the resin materials and a sufficient quantity of a non-dispersing pigment to give the extruded thermoplastic material a speckled surface appearance.

Highly filled extruded thermoplastic compositions having a speckled

A composition is disclosed which includes polybutylene terepthalate or polyethylene terephthalate, or blends of polybutylene terephthalate and polyethylene terephthalate, a polycarbonate, barium sulfate, strontium sulfate, zinc sulfate or zirconium oxide fillers, a phosphorus-containing stabilizer and optionally a styrene rubber impact modifier.

High density polyester-polycarbonate molding composition

Compositions comprising a high molecular weight polyester resin derived from a cyclohexanedimethanol and a hexacarbocyclic dicarboxylic acid or mixture of such resins and, optionally, a second linear high molecular weight polyester, optionally further combined with an effective, impact strength-improving amount of a thermoplastic elastomer, such as a polyether ester or a polyetherimide ester, with relatively high loadings of fillers selected from zinc oxide, barium sulfate, zirconium oxide, zirconium silicate, strontium sulfate or a mixture of any of such fillers, provide highly dense thermoplastic molded articles with improved impact strength and properties suitable to replace ceramics and filled thermosets in many important applications.

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Evansville, IN, United States of America

Eileen B Walsh