The Dow Chemical Company

Samuel A Ogoe

Thoi H Ho

Michael K Laughner

Hani Farah

Oliver C Ainsworth

James R Bethea

Kevin F Dick

John W Muskopf

Nancy J Schrock

Edwin J Wilson

David W Liou

Craig L Werling

Jeffrey E Lackey

John W Cocup

Charles F Diehl

Shaofu Wu

Wendy D Hoenig

Hoang T Pham

Leo R Novak

Frank M Hofmeister

Michael E Hus

Joseph L Allison

Stephen R Ellebracht

Jack W Muskopf

M Robert Christy

Jimmie D Spoon

Grace M Willis

Charles O Mork

Todd R Mayer

Brenda G Johnson

David R Flores

Leo A Novak

Lisa M Schwane

Robert W Ranger

Donna C Scott

Thomas D Burns

Disclosed is a polymer blend composition containing a branched aromatic carbonate polymer and a rubber-modified monovinylidene aromatic copolymer comprising a star-branched rubber and optionally, a linear rubber. The polymer blend compositions according to the invention have a desirable balance of processability and when molded, impact strength.

Flow carbonate polymer blends

Thermoplastic compositions of interpolymers of alpha-olefin monomers with one or more vinyl or vinylidene aromatic monomers and/or one or more hindered aliphatic or cycloaliphatic vinyl or vinylidene monomers blended with engineering thermoplastics

A polycarbonate blend composition with a good balance of high impact resistance, moldability, and controllable gloss with reduced tendencies of pearlescence or delamination in molded articles is prepared by admixing with polycarbonate a substantially linear ethylene polymer or linear ethylene polymer, an olefinic epoxide-containing copolymer, and a polyester.

Polycarbonate blend compositions

Disclosed is a carbonate polymer composition comprising (a) a carbonate polymer having a weight average molecular weight of from about 20,000 to about 40,000 and (b) from greater than about 0.1 to less than about 1.0 weight percent (based on carbonate polymer composition weight) low volatility aromatic phosphate ester compound, and optionally (c) from about 0.001 to about 0.1 weight percent (based on carbonate polymer compositions weight) of an alkali metal salt having a pH of at least about 7. Preferably the low volatility aromatic phosphate ester is selected from the group of aromatic phosphate ester oligomer compounds or haloaryl phosphate compounds. It has been found to be preferable to use a low volatility aromatic phosphate ester which experiences a weight loss of no more than 5 weight percent at 250.degree. C. when heated to a temperature of 500.degree. C. in a thermogravimetric analysis (TGA) at a heating rate of 20.degree. C. per minute, more preferably no more than 40 percent at 300.degree. C. It has been found that these compositions surprisingly achieve the Underwriters Laboratory (UL-94) V-2 rating without significantly sacrificing the otherwise good combinations of properties of carbonate polymer resins.

Carbonate polymer resins containing low volatility aromatic phosphate

A blend of polycarbonate and chlorinated polyethylene which has a desirable balance of impact and ignition resistance properties.

Blends of polycarbonate and chlorinated polyethylene

A blend of polyurethane and chlorinated polyethylene which has a desirable balance of impact, ignition and heat resistance properties.

Blends of polyurethane and chlorinated polyethylene

According to the present invention there are obtained improved ignition resistant carbonate polymer blends having unexpectedly better combinations of toughness, ignition resistance, processability and stability. In particular the blend comprises a major amount of carbonate polymer, a minor amount of a rubber-modified monovinylidene aromatic copolymer, and an optional rubbery core/shell graft copolymer impact modifier. As ignition resistance additives the blends contain a metal salt of an aromatic sulfur compound, a buffering aromatic sulfur compound, an organophosphorus compound, and a tetrafluoroethylene polymer.

Ignition resistant carbonate polymer blends

Improved thermoplastic resinous blends are disclosed comprising a carbonate polymer; an organophosphorus compound; a fluorinated polymer; and a halogenated diphenol oligocarbonate.

Ignition resistant polycarbonate blends

A blended composition containing polycarbonate and polyester and/or an acrylate polymer, modified with poly(tetrafluoroethylene), an organophosphorous compound and an aromatic halogenated carbonate oligomer to obtain ignition resistance properties, and, optionally, an elastomeric impact modifier.

Ignition resistant halo aromatic containing polymer compositions are disclosed which are mixtures of a blend of styrene-butadiene-acrylonitrile copolymers and carbonate polymers, 0.001 to 20% by weight of a high elastic memory polytetrafluoroethylene having a heat shrinkage equal to or greater than 15%, and 0.1 to 30% by weight of a halogenated aryl phosphate having at least one bromoaryl group.

Ignition resistant carbonate polymer blend compositions

A process for dispersing one or more powdered ignition resistant or flame retardant additives into carbonate polymers which comprises the steps of preparing a base concentrate having about 5 to about 50 weight per cent of said additives by blending said additives with a carbonate polymer having a melt flow rate from about 3 to about 20, pelletizing said base concentrate having said ignition resistant additive dispersed therein, dry blending said concentrate pellets with carbonate pellets having a melt flow rate from about 1 to about 80 whereby said polymer/concentrate blend has an amount of said additive dispersed therein effective to render said blend ignition resistant, and pelletizing or molding said carbonate polymer/concentrate blend. The use of this method gives ignition resistant carbonate polymers with improved impact properties as measured by Izod impact tests.

Dispersing ignition resistant additives into carbonate polymers

A flame retardant, impact resistant carbonate polymer composition comprising a mixture of one or more carbonate polymers, an impact modifying quantity of a rubbery polymer containing residual ethylenic unsaturation, a fluorine containing polymer of the fibril forming type and a metal salt of an inorganic acid.

Fire retardant impact modified carbonate polymer composition

Ignition resistant non-haloaromatic containing thermoplastic polymer compositions are disclosed which are mixtures of (1) a non-carbonate polymer such as a polyester terephthalate, a polyacetal, a polymethylmethacrylate and the like, (2) a carbonate polymer, or (3) a blend of (1) and (2) with a high elastic memory polytetrafluoroethylene, an organic phosphate, and a metal salt of an inorganic acid.

Ignition resistant modified thermoplastic composition

A composition of matter, being an admixture of polycarbonate and an aliphatic thio compound, molded articles of which release cleanly from, and without adhesion to, a mold.

Growing community of inventors

Missouri City, TX, United States of America

Samuel A Ogoe