Rohm and Haas Company

Other

William G Carson

William J Work

Robert M Amici

Edward E La Fleur

William T Freed

Nazir A Memon

Edward J Troy

Choung-Houng Lai

Choung H Lai

Jonathan Carson

Stanley W Wise

Edgar R Lang

A central air conditioning and ventilating system has an exterior air intake duct and a plurality of dampers for opening and closing air ducts. One damper is positioned in the exterior air intake duct and a second damper is positioned in the interior of a return air duct and a third damper is positioned in the interior return air duct escape air duct. The first damper can be opened while the second damper is closed and a third damper opened to convert the air conditioning system to a whole house ventilation system.

Central air conditioning, cooling and whole-house ventilation system

Impact modifiers which produce transparent, high notched Izod impact strength blends with amorphous, aromatic polyesters are described. The impact modifiers are core-shell polymers with cores comprised mainly of rubbery polymers of diolefins and vinyl aromatic monomers and shells comprised mainly of styrene copolymers (e.g. styrene and hydroxyalkyl (meth)acrylate).

Amorphous, aromatic polyester containing impact modifier

Polymer blends of a) polymers containing predominantly mers of (meth)acrylates and/or glutarimides with b) up to about 40 weight percent of polymers having greater than about 50 tool % vinyl alcohol mers exhibit useful barrier properties to oxygen and other environmental gases, while maintaining or enhancing physical properties and clarity.

Polymer blends with enhanced properties

Melt strengths and melt viscosities of aromatic polyesters are increased substantially by the addition of small amounts of certain high molecular weight vinyl aromatic modifiers which disperse very readily in aromatic polyesters.

Aromatic polyester melt strength improver

Polymer blends of a) polymers containing predominantly mers of (meth)acrylates and/or glutarimides with b) up to about 40 weight percent of polymers having greater than 50 mol % vinyl alcohol mers exhibit useful barrier properties to oxygen and other environmental gases, while maintaining or enhancing physical properties and clarity.

Polymer blends of a) polymers containing predominantly mers of(meth)acrylates and/or glutarimides with b) up to about 40 weight percent of polymers having greater than about 50 mol % vinyl alcohol mers exhibit useful barrier properties to oxygen and other environmental gases, while maintaining or enhancing physical properties and clarity.

Strong, tough, ovenable trays may be formed from poly(ethylene terephthalate) modified with 4-29% core/shell polymer, 0-14.5% aromatic polycarbonate and 1-5% aromatic polyester crystallization-rate accelerator.

Crystallizable polyester resin having high impact strength and

A method of improving flow of acrylic molding powders, without significantly diminishing the heat distortion, strength and toughness properties, comprising mixing therewith a flow modifier polymer which has a specified compatibility relationship with said molding powder, as defined by a specified difference in solubility parameters. The resulting compositions are also disclosed.

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Moorestown, NJ, United States of America

William G Carson