Dow Corning Corporation

Exxon Chemical Patents, Inc.

Anil Kumar Saxena

Toshio Suzuki

Shaow B Lin

Michael Gene Altes

Todd Matthew Starke

Lee Bowen Jensen

Raymond Lee Tabler

Linda Denise Kennan

Craig Gross

Hsien-Chang Wang

Gerald A Gornowicz

Peter Y Lo

David Yen-Lung Chung

Arthur James Tselepis

Anne K Shim

William Blackwood

Water-continuous emulsion of elastomeric polymers are disclosed having a solids content of greater than 75%, an average particle size less than 5 &#x3bc;m, and having sufficient stability to produce a stable lower solids emulsion upon dilution with water comprising; an elastomeric polymer, surfactant, water, optional plasticizer, optional low molecular weight acid, and is essentially free of organic solvents. The water-continuous emulsions of elastomeric polymers can be prepared by; (I) forming a premix that is essentially free of organic solvents comprising an elastomeric polymer and surfactant, and optionally a plasticizer and low molecular weight acid, and (II) adding water to the premix with mixing to form a water continuous emulsion of the elastomeric polymer having a solids content of greater than 75%, an average particle size less than 5 &#x3bc;m, and having sufficient stability to produce a stable lower solids emulsion upon dilution with water.

High solids emulsions of elastomeric polymers

Water-continuous emulsion of silylated elastomeric polymers are disclosed having a solids content of greater than 75%, an average particle size less than 5 &mgr;m, and having sufficient stability to produce a stable lower solids emulsion upon dilution with water comprising; a silylated elastomeric polymer, surfactant, water, optional plasticizer, and optional low molecular weight acid. The water-continuous emulsions of silylated elastomeric polymers can be prepared by; (I) forming a premix comprising an elastomeric polymer and surfactant, and optionally a plasticizer and low molecular weight acid, and (II) adding water to the premix with mixing to form a water continuous emulsion of the silylated elastomeric polymer having a solids content of greater than 75%, an average particle size less than 5 &mgr;m, and having sufficient stability to produce a stable lower solids emulsion upon dilution with water.

High solids emulsions of silylated elastomeric polymers

Water-continuous emulsion of elastomeric polymers are disclosed having a solids content of greater than 75%, an average particle size less than 5 &mgr;m, and having sufficient stability to produce a stable lower solids emulsion upon dilution with water comprising; an elastomeric polymer, surfactant, water, optional plasticizer, optional low molecular weight acid, and is essentially free of organic solvents. The water-continuous emulsions of elastomeric polymers can be prepared by; (I) forming a premix that is essentially free of organic solvents comprising an elastomeric polymer and surfactant, and optionally a plasticizer and low molecular weight acid, and (II) adding water to the premix with mixing to form a water continuous emulsion of the elastomeric polymer having a solids content of greater than 75%, an average particle size less than 5 &mgr;m, and having sufficient stability to produce a stable lower solids emulsion upon dilution with water.

Methods of coating fabrics with emulsions of elastomeric polymers and polyurethane dispersions

Curable silylated copolymers based on olefin copolymers comprising at least one C,to C,isomonoolefin and a vinyl aromatic monomer (alkyl styrene) are prepared by reacting the olefin copolymer with an olefinically unsaturated hydrolyzable silane in the presence of a free radical generating agent. The silylated copolymers are readily curable by contact with water (moisture) and a silanol condensation catalyst and are particularly useful as the polymeric component in sealant, caulking, adhesive and coating formulations.

Silane grafted copolymers of an isomonoolefin and a vinyl aromatic monomer

Method for homopolymerization of polyorganosiloxane macromonomers having acryloxy or methacryloxy groups. A miniemulsion of a methacryloxy functional polydimethylsiloxane macromonomer was prepared by mixing the macromonomer with a surfactant(s), and subjecting it to a high shear device. The macromonomer was polymerized in the miniemulsion by using a free radical initiator at high temperature. The amount of unreacted macromonomer is very low.

Homopolymerization of acrylate or methacrylate endblocked

This invention relates to the preparation of an addition curable composition which when cured has increased thermal stability. The addition curable composition comprises an organic polymer having on average at least 1.4 alkenyl groups per molecule, a crosslinker having on average at least 2 hydrosilyl groups per molecule, a platinum group metal-containing catalyst and a benzotriazole derivative stabilizer.

Addition curable compositions having increased thermal stability

The present invention relates to a method for preparing a polyisobutylene-siloxane block copolymer, said method comprising: (I) lithiating (A) a polyisobutylene having one or two terminal silanol groups with (B) an organolithium compound; (II) reacting the silanolate-functional polyisobutylene obtained in step (I) with (C) a hexaorganocyclotrisiloxane; and (III) capping the siloxanotate-functional block copolymer obtained in step (II) with a compound selected from (D) a silane having at least one hydrolyzable group or (E) an acid.

Block copolymers of polyisobutylene and polydimethylsiloxane

Method of making copolymers of (i) an acrylic or methacrylic-functional polyisobutylene macromonomer, (ii) a polydiorganosiloxane macromonomer, and optionally (iii) a radical polymerizable monomer such as an alkyl acrylate or alkyl methacrylate. The copolymers are prepared by copolymerizing the monomers in a miniemulsion using a free radical initiator at high temperature. In the method, the monomers are mixed with a surfactant(s) and optionally a cosurfactant(s), and subjected to high shear.

Copolymers of polyorganosiloxane, polyisobutylene, and alkyl acrylates

This invention relates to the preparation of an addition curable composition which when cured has increased resistance to degradation by ultraviolet light. The addition curable composition comprises an organic polymer having on average at least 1.4 alkenyl groups per molecule, a crosslinker having on average at least 2 hydrosilyl groups per molecule, a platinum group metal-containing catalyst and a benzotriazole derivative stabilizer.

Addition curable composition having increased resistance to degradation

The present invention relates to a method for preparing an acrylic-functional polyisobutylene polymer or copolymer, said method comprising reacting a polyisobutylene polymer or copolymer which contains at least one carbon-bonded silanol group in its molecule with a silane having both an acrylic-containing group and a silicon-bonded hydrolyzable group in its molecule.

Growing community of inventors

Midland, MI, United States of America

Anil Kumar Saxena