General Electric Company

The Uniroyal Goodrich Tire Company

James L Derudder

I-Chung W Wang

Sterling B Brown

Niles R Rosenquist

Roy Ray Odle

Frank J Traver

Christopher M Hawkins

Stanley Young Hobbs

Larry I Flowers

Ye-Gang Lin

Vicki Herzl Watkins

Marinus E Dekkers

John P Porter

Choong Y Han

Leonard R Hepp

Edgar E Bostick

Herman B Savenije

Richard W Howery

Muhanad A Alsamarraie

Kenneth M Schur

Richard Crosby

A thermoplastic molding composition including at least one polycarbonate resin which is a polycarbonate homopolymer or copolymer; and an amount of at least one tetrahalobisphenol A copolymer effective to reduce the yellowness index of the at least one polycarbonate resin as determined after thermally molding the composition into an article. The article molded from the thermoplastic molding composition has a lower yellowness index than that of an article molded from a corresponding thermoplastic molding composition which does not contain any of the at least one tetrahalobisphenol A copolymer.

Color improved polycarbonate compositions and molded articles

A composition comprising a phosphorus containing acid and an ester of a phosphorus containing acid useful for imparting improved physical and chemical properties to polymers containing polyesters, copolyester carbonates, polycarbonates, and mixtures thereof, a method of treating said polymers with said composition, and articles of manufacture comprising said polymers and said composition.

Complex stabilizer composition to improve the melt stability and color

Thermoplastic articles molded from polycarbonate resin blends which comprise a polycarbonate resin encapped with a monovalent moiety of the formula: ##STR1## wherein R.sub.1 is selected from hydrogen and hydrocarbyl and each R.sub.2 is selected from hydrocarbyl and hydrocarbyloxy exhibit improved color when irradiated with ionizing radiation.

Irradiation resistant functionally encapped polycarbonate

Thermoplastic articles molded from amorphous polyamide and polycarbonate resin blends exhibit improved color when irradiated with ionizing radiation.

Irradiated articles molded from polycarbonate-polyamide blends

Silane esters are transesterified with hydroxyl-terminated polyester resins to obtain end-capped, extended or branched polyester molding compositions.

Endcapped, chain-extended and branched polyesters

Polyphasic resin blends and particularly polycarbonate/polyester blends, are prepared with modifiers comprising combinations of polyorganosiloxane/polyvinyl-based graft copolymer(s), polyorganosiloxane-based graft copolymer(s) and/or diene rubber-based graft copolymer(s), imparting a wide range of physical properties to the blends.

Thermoplastic compositions containing combined modifiers

Polycarbonate and polyester blends are prepared with a combination of modifiers comprising a multi-stage polyorganosiloxane-based graft polymer composition and a diene rubber-based graft polymer composition imparting a wide range of excellent physical properties on the PC and PE blends.

Polycarbonate and polyester blends modified with polyorganosiloxane

Thermoplastic molding compositions are provided which comprise a polyester resin alone or in combination with a poly(etherester) elastomer, a poly(etherimide ester) elastomer, or a mixture of the foregoing modified with a multi-stage polyorganosiloxane/polyvinyl-based graft polymer which exhibit materially enhanced impact strength, particularly at low temperatures, while maintaining other desirable properties without showing any tendency to delaminate. Particularly noteworthy are reductions in surface gloss and the substantially complete elimination of mottling.

Polyesters modified with polyorganosiloxane/polyvinyl-based graft

Polyamide-carbonate block copolymers are made by admixture of polyamides with carbonate polymers containing carboxyl groups or an ester groups capable of elimination to form carboxyl groups, in the presence of a polyepoxy linking agent, such as triglycidyl isocyanurate. Such block copolymers may be used as thermoplastics or as blending agents for polyamides and carbonate polymers.

Polyamide polycarbonate block copolymer

Determining the rate of change of fluid pressure in a tire comprises mounting the tire in an inflated condition. A tire pressure sensor senses fluid pressure in the tire and generates an electrical signal in proportion to the fluid pressure sensed in the tire. A temperature sensor senses the temperature adjacent the tire and generates an electrical signal in proportion to the temperature sensed adjacent the tire. A data acquisition system is in electrical communication with the sensors. The data acquisition system receives the electrical signals from the respective sensors at a substantially simulatneously time and converts the electrical signals into digital information. An electronic digital computer is an electrical communication with the data acquisition system for receiving the digital information and for calculating a value representative of a corrected pressure in the tire as a function of the digital information received. A plurality of the corrected pressure values are stored. The stored corrected pressure values are linearized to provide another value indicative of the rate of change of pressure in the tire.

Determining the air permeability of a tire

Thermoplastic molding compositions are provided which comprise a polycarbonate resin alone or in combination with a saturated polyester resin and/or a poly(etherester) elastomer, a poly(etherimide ester) elastomer or a mixture thereof; a polyphenylene ether resin and a saturated polyester resin; a polyphenylene ether resin, a saturated polyester resin and a polycarbonate resin; or mixtures thereof modified with multi-stage polyorganosiloxane/polyvinyl-based graft polymers which exhibit markedly improved impact strength and weld line strength with no tendency to delaminate or to show mottled surfaces after molding.

Thermoplastic molding compositions containing

Articles made from normally glossy thermoplastic polymer resins are flatted to reduce gloss by the addition of multi-stage polyorganosiloxane/polyvinyl-based graft polymer flatting agent compositions.

Low gloss molded articles using polyorganosiloxane/polyvinyl-based graft

Branched polyester compositions having high melt viscosities, especially under conditions of low shear, are prepared in a two-step method. The first step is the reaction of a linear polyester, polycarbonate or polyester-polycarbonate containing free carboxylic acid groups with a polyfunctional epoxyalkyl compound such as triglycidyl isocyanurate to form a reactive concentrate. The second step is the reaction of said reactive concentrate with a polyester, such as poly(ethylene terephthalate) or poly(butylene terephthalate), containing a measurable proportion of carboxylic acid end groups. By this two-step method, it is possible to use less epoxy compound for a given melt viscosity level than is the case when the epoxy compound is directly blended with the polyester.

Preparation of linear polyester-polyepoxide reaction products via

Polyester-polycarbonate blends having increased melt viscosity, and useful in such applications as blow molding, profile extrusion and thermoforming, are prepared by incorporating at least one poly(O- or N-epoxyalkyl-substituted) cyclic amide, imide or imidate, preferably triglycidyl isocyanurate. They may also contain impact modifying polymers.

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Mt. Vernon, IN, United States of America

James L Derudder