The Dow Chemical Company

Warren L Treptow

Chung P Park

Charles D Gartner

Kun S Hyun

George A Paul

Kalakota S Reddy

David E Wallick

John K Swayze

Billy R Hardas

Dale S Gibbs

Thomas L Staples

Stewart P Wood

Connie L Deford

Connie I Deford

Absorbent polymer having reduced dusting tendencies

Substituted 3-thio-2-propynenitriles are prepared which correspond to the formula:

Composition and use of substituted 3-thio-2-propynenitriles as

Composition and use of substituted 3-thio-2-propynenitriles as an

A polymeric composition is provided which includes the reaction product of vinylidene chloride, an optional copolymerizable monomer, and an .alpha.,.beta. ethylenically unsaturated silane crosslinking agent. The polymeric reaction product may also be used to form films and coating. The composition further may include a volatile blowing agent which, when activated, expands the polymeric reaction product into a low density cellular structure.

Crosslinked silane-functional vinylidene chloride polymer and films or

A polymeric composition is provided which includes the reaction product of vinylidene chloride, an optional copolymerizable monomer, and an .alpha.,.beta. ethylenically unsaturated silane crosslinking agent. The polymeric reaction product may also be used to form films and coatings. The composition further may include a volatile blowing agent which, when activated, expands the polymeric reaction product into a low density cellular structure.

A process for preparing, in aqueous emulsion, controlled interpolymer compositions. The interpolymer compositions have polymerized therein from about 86 to 92 mole percent, vinylidene chloride, from about 14 to 8 mole percent of a comonomer mixture of methyl methacrylate and a comonomer selected from the group consisting of acrylonitrile, methacrylic acid and methacrylonitrile in a ratio of the comonomer to methyl methacrylate of from about 0.5:1 to 2:1, and from about 0.5 to 1.0 weight percent itaconic acid, based on weight of vinylidene chloride plus comonomer mixture. The interpolymers are prepared in a three step process. The third step, or Step III, wherein monomer feeding is step-wise reduced for a portion of the step and a polymerization initiator is added at generally the same constant rate as the rate of addition in Steps I and II, generally reduces the amount of unreacted mixed monomers remaining after monomer addition is completed. As such, the detrimental results produced when a large amount of polymer composition variation in the direction of high vinylidene chloride fractions are markedly reduced.

High vinylidene chloride content interpolymer coating resins and method

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Midland, MI, United States of America

Warren L Treptow