The Dow Chemical Company

Dow Global Technolgoies LLC

Styron Europe Gmbh

Roger W Bergman

Harry A Smith

Richard R Klimpel

Thomas H Kalantar

Liang Hong

Robert D Hansen

Bedri Erdem

Mladen Ladika

Linda Kim-Habermehl

Keith Harris

Dominique Martin

A carpet backing composition that includes a frothable aqueous composition and a froth aid. The frothable aqueous composition includes a polymeric binder, and the froth aid includes a polypropylene glycol, a polypropylene glycol ether, or a combination thereof. The froth aid has a weight average molecular weight of 130 to 2000. The carpet backing composition can be used to prepare a carpet product.

Frothable aqueous composition for use in a carpet backing composition

A water redispersible polymer powder may be produced by drying an aqueous mixture of a water insoluble film-forming polymer and a colloidal stabilizer comprising a chelating agent to obtain a water redispersible polymer powder, where the amount of chelating agent is at least 0.1% by weight, preferably at least 1% by weight, most preferably at least 3% by weight, based upon the weight of the water insoluble film-forming polymer. Dispersions or polymer compositions containing a chelating agent as a colloidal stabilizer exhibit an unexpectedly low viscosity which facilitates spray drying and permits use of high solids content dispersions with low pressure spray drying to increase production efficiency. The chelating agents are stable at high pH and so high pH spray dryable compositions containing them as a colloidal stabilizer may sit or be stored for prolonged periods of time prior to spray drying without loss of effectiveness of the colloidal stabilizer.

Stabilized redispersible polymer powder compositions

The invention relates to novel O,O'-, O,S'- or S,S'-dithiodialkylene-bis(mono- or dihydrocarbyl carbamothioates) and S,S'-dithiodialkylene-bis(mono- or dihydrocarbyl carbamodithioate). The novel compounds of this invention are useful as collectors in the froth flotation of sulfide mineral ores.

Novel O,O'-, O,S'- or S,S'-dithiodialkylene-bis(mono- or dihydrocarbyl

O,O'-, O,S'- or S,S'-dithiodialkylene-bis(mono- or dihydrocarbyl

The invention relates to novel O- or S-(2-mercaptoalkyl)mono- or dihydrocarbyl carbamothioates and S-(2-mercaptoalkyl)mono- or dihydrocarbyl carbamodithioate. The novel compounds of this invention are useful as collectors in the froth flotation of sulfide mineral ores.

O- and S-(2-mercaptoalkyl)- mono- or dihydrocarbyl carbamothioates and

The invention is a process for recovering coal or mineral values from raw coal or mineral ore which comprises subjecting the raw coal or mineral ore in the form of an aqueous pulp, to a floatation process in the presence of a floatation collector, and a flotating amount of a floatation frother which comprises the reaction product of an alitphatic C.sub.6 alcohol and between about 1 and 5 moles of propylene oxide, butylene oxide or mixtures thereof, under conditions such that the coal or mineral values are recovered.

Frothers demonstrating enhanced recovery of coarse particles in froth

The invention is a process of concentrating sulfide ores, which comprises subjecting a sulfide ore, in the form of a pulp, to a flotation process in the presence of a flotation collector for the sulfides comprising a 1,3-oxathiolane-2-thione or a 1,3-dithiolane-2-thione.

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Midland, MI, United States of America

Roger W Bergman