Roehm Gmbh Chemische Fabrik

Evonik Roehm Gmbh

Rohm Gmbh

Rohm Gmbh Chemische Fabrik

Evonik Rohm Gmbh

Dieter Tessmer

Wilhelm Elser

Michael Wicke

Wolfgang Klesse

Karl Foelsch

Hubert Scheuermann

Joachim Knebel

Klaus Langerbeins

Gerold Schmitt

Volker Kerscher

Guido Protzmann

Klaus Gottmann

Ralf Merbach

Wilhelm Karnbrock

John Hirsh

Herbert Fink

Christine Maria Breiner

Theodor Mager

Karl J Folsch

Norbert Sutterlin

Peter Rossberg

Ursula Rausch

Karl-Josef Folsch

Hans-Juergen Geyer

Karl-Heinz Jagsch

Hans-Dieter Blitz

Process for preparing (meth)acrylates of the formula (I)CH&#x2550;C(R)&#x2014;CO&#x2014;O&#x2014;R&#x2003;&#x2003;(I)in which Ris hydrogen or methyl andRis a saturated or unsaturated, linear or branched, aliphatic or cyclic alkyl radical having 6 to 22 carbon atoms, or a (C-C)-aryl-(C-C)-alkyl radical;by reacting a (meth)acrylate of the formula IICH&#x2550;C(R)&#x2014;CO&#x2014;OR&#x2003;&#x2003;(II)with an alcohol of the formula (III)HO&#x2014;R&#x2003;&#x2003;(III)in the presence of an amount of a suitable catalyst which catalyzes the reaction and of an amount of a phenolic polymerization inhibitor or a combination of two or more phenolic polymerization inhibitors which is sufficient to inhibit undesired polymerization;the reaction being undertaken with input or introduction into the reaction mixture resulting from the reaction of an amount of oxygen or of an oxygenous gas mixture sufficient to inhibit undesired polymerization, and the process is characterized in thatthe specific total oxygen input is less than or equal to 1.0 l/kg, measured in liters of oxygen per kilogram of (meth)acrylate of the formula (I), where the volume of oxygen introduced is calculated at a temperature of 25&#xb0; C. and a pressure of 101 325 pascal. The resulting (meth)acrylates can surprisingly be processed to particularly high molecular weight emulsion polymers which are, for example, outstandingly suitable for use as flow resistance reducers in mineral oil extraction.

Process for preparing (meth)acrylates

Process for preparing (meth)acrylates of the formula (I)CH&#x2550;C(R)&#x2014;CO&#x2014;O&#x2014;R&#x2003;&#x2003;(I) The resulting (meth)acrylates can surprisingly be processed to particularly high molecular weight emulsion polymers which are, for example, outstandingly suitable for use as flow resistance reducers in mineral oil extraction.

The present invention relates to an emulsion polymer comprising at least one (meth)acrylate segment which comprises

Emulsion polymers, aqueous dispersions and method for producing the same

Poly(meth)acrylate dispersions, comprised of: (A) 50-90 wt. % methacrylic acid esters; (B) 5-30 wt. % acrylic acid alkyl esters; &lsqb;lit., &ldquo;acrylic acid acrylic esters&rdquo;&rsqb;; (C) 2-10 wt. % of another functionalized monomer; (D) 2-10 wt. % of a radically polymerizable carboxylic acid or a polycarboxylic acid or a partially esterified polycarboxylic acid; and (E) 0-40 wt. % of a monomer which is copolymerizable with components (A) to (D).

Method of producing aqueous dispersions as a base for hot sealing adhesives

Poly(meth)acrylate dispersions, comprised of: (A) 50-90 wt. % methacrylic acid esters; (B) 5-30 wt. % acrylic acid alkyl esters; (C) 2-10 wt. % of another functionalized monomer; (D) 2-10 wt. % of a radically polymerizable carboxylic acid or a polycarboxylic acid or a partially esterified polycarboxylic acid; and (E) 0-40 wt. % of a monomer which is copolymerizable with components (A) to (D).

A hot-sealable coated substrate comprising a primer layer from an aqueous poly(meth)acrylate dispersion, comprised of: (A) 50-90 wt. % methacrylic acid esters; (B) 5-30 wt. % acrylic acid alkyl esters &lsqb;lit., &ldquo;acrylic acid acrylic esters&rdquo;&rsqb;; (C) 2-10 wt. % of another functionalized monomer; (D) 2-10 wt. % of a radically polymerizable carboxylic acid or a polycarboxylic acid or a partially esterified polycarboxylic acid; and (E) 0-40 wt. % of a monomer which is copolymerizable with components (A) to (D).

Poly(meth)acrylate dispersions, comprised of: (A) 50-90 wt. % methacrylic acid esters; (B) 5-30 wt. % acrylic acid alkyl esters, &lsqb;lit., &ldquo;acrylic acid acrylic esters&rdquo;&rsqb;; (C) 2-10 wt. % of another functionalized monomer; (D) 2-10 wt. % of a radically polymerizable carboxylic acid or a polycarboxylic acid or a partially esterified polycarboxylic acid; and (E) 0-40 wt. % of a monomer which is copolymerizable with components (A) to (D).

Aqueous dispersion of carboxylic acid functionalized poly(meth)acrylate

A powdery bonding agent for paints which is soluble in pure aliphatic compounds, and which is in the form of powdery polymerizate particles, which consists of, at least on the particle surface, of a copolymerizate formed of: (i) 60 to 95 percent by weight of units of at least one hardening monomer selected from the group consisting of (A) isobutylmethacrylate and (B) cycloalkylmethacrylate; and (ii) 5 to 40 percent by weight of units of at least one aliphatic-substance-solubilizing monomer selected from the group consisting of (C) alkylmethacrylates having 6 to 18 carbon atoms in the alkyl residue, where the units of isobutylmethacrylate account for no more than 60 percent by weight and the units of cycloalkylmethacrylates account for no less than 10 percent by weight, based on, in each case, the weight of the copolymerizate.

Pure-aliphatic compound-soluble powdery bonding agent for paints

Varnishing plastic surfaces with a clear or pigmented aqueous dispersion of a (meth)acrylate copolymer of (a) 20 to 90% by weight of acrylic and/or methacrylic acid alkyl or cycloalkyl esters with 1 to 10 carbon atoms in the ester group; (b) 80 to 10% by weight of acrylic and/or methacrylic acid esters with aromatic groups as the ester group or containing aromatic groups in the ester group; and (c) optionally, small quantities of other monomers, results in the formation of a firmly adhering, water and alcohol resistant finish. The copolymers are preferably emulsion polymers and are synthesized as multiple-phase polymers according to the core-shell model.

Aqueous polyacrylate systems for varnishing plastic surfaces

A film-forming, self-crosslinking aqueous synthetic resin dispersion with reduced liberation of formaldehyde contains an emulsion polymer composed of

Aqueous synthetic resin dispersions

The inventive vehicle, or binder, for water based gloss paints contains, dispersed in a aqueous phase, particles of a multiphase emulsion polymer made up of

Binder for aqueous gloss paints

A process for the continuous preparation of aqueous plastic dispersions which comprises emulsifying one or more free-radically polymerizable monomers in an aqueous phase in the presence of an emulsifying agent, in an agitator vessel; initiating the free-radical polymerization of said monomer or monomers in said aqueous phase; and passing said aqueous emulsion of the free-radically polymerizing monomer or monomers through a tubular reactor whose internal surface comprises an (optionally fluorinated)saturated polyolefin.

Growing community of inventors

Darmstadt, Germany

Dieter Tessmer