The Dow Chemical Company

Exxon Chemical Patents, Inc.

Dupont Dow Elastomers Inc.

Gary R Marchand

Brian W Walther

Larry Alan Meiske

Ricardo Fuentes, Jr

Charles F Diehl

Jean M Tancrede

Joseph G Schell, Jr

Mohamed Esseghir

William Monroe Coleman, Iii

Michael O Myers

Mark Thomas Berard

Brian G Witt

Warren R Rose

Gary L Woodson

Bharat I Chaudhary

Jeffrey M Cogen

Gangwei Sun

Corwin J Bredeweg

Chester J Kmiec

Virginia Hayes Guffey

Yushan Hu

Chlorinated olefin polymers prepared from olefin polymer base resins having Ivalues of 0.05-0.8 dg/minute act as impact modifiers for vinyl chloride polymers under low to ambient temperature conditions. When vinyl chloride polymers are mixed with a preferred class of the chlorinated polymers, having chlorine contents of 20-30 percent by weight, compositions that exhibit short fusion times and low fusion temperatures are produced.

Chlorinated polyolefin impact modifier for vinyl chloride polymers

The present invention is specifically directed to improved polyvinyl chloride compositions having excellent impact strength. In particular, the impact resistant composition comprises a) a vinyl chloride polymer, b) at least one ethylene/alpha-olefin copolymer, said copolymer having a density of 0.858 to 0.91 g/cc and having a melt index from an I value of 0.1 to an I value of 10, and c) at least one randomly chlorinated olefin polymer having a chlorine content of from 20-40 percent by weight, the feedstock for said chlorinated olefin polymer having a melt index from an I value of 0.1 to an I value of 10. Optionally, these impact resistant polyvinyl chloride compositions may have inorganic filler levels from 5 to 50 parts per hundred relative to the polyvinyl chloride polymer.

Impact resistant rigid PVC compositions using hydrocarbon rubbers and chlorinated polyethylene as impact modifiers

Aqueous dispersions, and films prepared therefrom, comprising an organic phase of block copolymers and optional extenders wherein the block copolymers corresponds to the formula:

Films from aqueous dispersions of block copolymers having hydrogenated

The invention is drawn to radial block copolymers of the formula:

Radial styrene-isoprene-butadiene multi-armed block copolymers and

Radial block copolymers characterized by the formulas: (1) (pS-pI).sub.n X and (2) (pS-pI-pB).sub.n X where pS is polystyrene, pI is polyisoprene, pB is butadiene, X is a residue of a multifunctional coupling agent used in the production of the radial block copolymer, and n is a number greater than 2 representative of the number of branches appended to X; hot-melt adhesive compositions constituted of said radial block copolymers, and articles of manufacture produced therefrom. These copolymers possess blocks of high average molecular weight polystyrene (10,000 to 25,000) and an overall average molecular weight (90,000 to 380,000) such that when blended in requisite proportions with a compatible tackifier resin, preferably also a secondary tackifying resin or plasticizing oil, and stabilizer, superior hot-melt adhesive compositions can be formed. The hot-melt adhesive compositions possess, inter alia, superior heat resistance, superior static time to failure with low viscosity, good peel adhesion, good tack, and high ability to bond to a polyethylene or polypropylene substrate at temperatures below that which may damage the substrate.

Adhesive compositions containing radial block copolymers with butadiene

Radial block copolymers containing butadiene endblock

A reactor for the solution polymerization of volatile monomers equipped with an agitator to cause splashing and droplet formation to reduce volatile monomer accumulation in the vapor space.

Reactor with surface agitator for solution polymerization process

A process for anionic polymerization of polymerizable monomers with an organo lithium initiator followed by polymerization termination characterized in that terminated reaction products are neutralized by contacting with sulfuric acid, phosphoric acid or a mixture thereof.

Anionic polymerization process

A process for the solution polymerization of volatile monomers in a reactor equipped with an agitator to cause splashing and droplet formation to reduce volatile monomer accumulation in the vapor space.

Olefins are polymerized under solution polymerization conditions in the presence of the solid catalytic product resulting from removing the liquid components from the product resulting from admixing in an inert diluent and in an atmosphere which excludes moisture and oxygen (A) at least one hydrocarbon soluble organomagnesium compound; (B) at least one organic hydroxyl-containing compound; (C) at least one reducing halide source; (D) at least one transition metal (Tm) alkoxide.

Catalyst and process for polymerizing olefins

A process for blanking a reaction mixture utilizing as a blanking agent a difunctional lithium composition.

Blanking process for reaction mixture

A catalyst for polymerizing olefins is the product resulting from mixing in an inert hydrocarbon diluent, a mixture of (A) an inorganic oxide, (B) an organomagnesium material, (C) an organic hydroxyl-containing material, (D) a reducing halide source, and (E) a transition metal compound.

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Baton Rouge, LA, United States of America

Gary R Marchand