Celanese Gmbh

Shau-Zou Lu

Melvin L Druin

John Christiansen

Daniel Zimmerman

Polyethylene terephthalate resin compositions are provided containing fillers; reinforcing agents; or blends of such fillers and agents; alkali metal silicates, carbonates, or bicarbonates; and neopentylglycol dibenzoate. Articles molded from these compositions have high gloss surfaces and heat deflection temperatures when molded at temperatures below 110.degree. C. even without a precompounding drying stage. Surprisingly, the inclusion of neopentylglycol dibenzoate allows the concentration of alkali metal silicate, carbonate, or bicarbonate to be substantially reduced while retaining the high gloss surfaces seen when alkali metal silicates, carbonates, or bicarbonates are used alone at much higher concentrations.

High gloss polyethylene terephthalate reinforced resin compositions

Nucleating agents have been discovered which enable molded articles to be prepared with smooth glossy surfaces from blends of polyethylene terephthalate and polybutylene terephthalate in the 'wet state', i.e., without the resin having been subjected to a predrying stage. The present invention is directed to polyalkylene terephthalate resin compositions. Specifically, it is directed to undried blends of polyethylene terephthalate and polybutylene terephthalate resins with nucleating agents which enable these resin blends to be molded into articles with smooth glossy surfaces. In a preferred embodiment fillers and/or reinforcing materials are added without subjecting the resin to a predrying treatment which has been heretofore necessary in the prior art.

Polyester blends

Provided is a glass reinforced molding composition which comprises a mixture of (i) a copolymer of trioxane and a cyclic ether or cyclic acetal or linear polyacetal, (ii) a terpolymer of trioxane, a cyclic ether and/or cyclic acetal and a diglycide of the formula ##STR1## wherein Z is a carbon-to-carbon bond, an oxygen or oxyalkoxy of 1 to 8 carbon atoms or an oxy-poly(lower alkoxy), and (iii) a glass reinforcing agent. The resulting glass reinforced composition exhibits improved property retention, e.g., of properties such as tensile strength.

Glass reinforced poly(oxymethylene) composition having improved property

Polyethylene terephthalate resin compositions are provided containing fillers; reinforcing agents; or blends of such fillers and agents and selected alkali metal salts having anions which are oxides of Group IV of the periodic table preferably carbonates and bicarbonates. Articles molded from these compositions have high gloss surfaces and heat deflection temperatures when molded at temperatures below 110.degree. C. even without a precompounding drying stage.

Improved polyoxymethylene molding compositions comprising fiber reinforcement such as glass, wherein the fiber reinforcement is surface treated with a vinyl polymer, such as polyvinylacetate.

Fiber reinforced polyoxymethylene molding compositions

Nucleating agents have been discovered which enable molded articles to be prepared with smooth glossy surfaces from blends of polyethylene terephthalate and polybutylene terephthalate in the 'wet state', i.e., without the resin having been subjected to a predrying stage. The present invention is directed to polyalkylene terephthalate resin compositions. Specifically, it is directed to undried blends of polyethylene terephthalate and polybutylene terephthalate resins with nucleating agents which enable these resin blends to be molded into articles with smooth glossy surfaces. In a preferred embodiment, fillers and/or reinforcing materials are added without subjecting the resin to a predrying treatment which has been heretofore necessary in the prior art.

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Whitehouse Station, NJ, United States of America

Shau-Zou Lu