Rohm Gmbh

Rohm Gmbh Chemische Fabrik

Roehm Gmbh Chemische Fabrik

Herbert Fink

Horst Dinklage

Werner Siol

Norbert Suetterlin

Klaus Huebner

Hubert Rauch

Willi Tilch

Heiner Kniese

Horst Pennewiss

Wolfgang Klesse

Gerhard Markert

Klaus Langerbeins

Hans Ottofrickenstein

Gunther Mueller

Joachim Heyne

Klaus Mueller

Hermann Plainer

Siegmund Besecke

Dieter Tessmer

Hans Trabitzsch

Juergen Masanek

Gunter Schroder

Norbert Sutterlin

Josef Frieser

Karl-Josef Folsch

Hans-Peter Wolf

Egon Grumbach

Peter Frank

Klaus Hubner

Pressure sensitive adhesive dispersion of a copolymer of butylacrylate and (meth) acrylic acid

A method for preparing a dispersion for a pressure sensitive adhesive is provided, wherein the dispersions contain a copolymer (CP) having units of butyl acrylate and (meth)acrylic acid, the method involving the steps of polymerizing an aqueous emulsion (EM) containing butyl acrylate, an anionic emulsifier and a non-ionic emulsifier, in the aqueous phase, under heating and in the presence of at least one water-soluble initiator (IN) of formula (I)

Dispersions for pressure sensitive adhesives containing alkyl (meth)

Polyvinyl chloride surfaces receive a well-adhering, water and ethanol resistant coating with good plasticizer sealing effect by varnishing with an aqueous dispersion of (meth)acrylate polymers that are synthesized from 10 to 90% by weight acrylic and/or methacrylic acid alkyl or cycloalkyl esters with 1 to 10 carbon atoms in the ester group, 90 to 10% by weight acrylic and/or methacrylic acid esters with aromatic groups constituting or contained in the ester group, and small quantities of other monomers. The copolymers are preferably emulsion polymerized and may be synthesized as multiple-phase polymers according to the core-shell model.

Aqueous polyacrylate dispersion for coatings

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

Aqueous synthetic resin dispersions

A method for the manufacture of bound textile sheets, comprising treating a textile sheet substrate with a water dispersion of a mixed polymerizate binder of: (a) 80-99% by wt. of a C.sub.1-8 alkyl ester of acrylic acid, a C.sub.1-8 alkyl ester of methacrylic acid, or combination thereof, or a mixture of at least one of said acrylate or methacrylate esters with styrene, (b) 1-10% by wt. of an acrylamide glycolic acid monomer of the formula: ##STR1## wherein R is hydrogen or methyl, R' is alkyl and R' is hydrogen or alkyl, and (c) 0-20% by wt. of another comonomer.

Bound textile sheet and procedure for its manufacture

What is disclosed is a method for thickening aqueous systems in the acid range at a pH below 7 by the addition of an aqueous dispersion of a synthetic polymer having a molecular weight of at least 500,000, and which is water soluble or at least colloidally dispersible at a pH below 7, said polymer comprising (A) 5-100 percent by weight of at least one monomer having at least one basic nitrogen atom (B) 0-95 percent by weight of at least one monomer which has at most limited solubility in water, and (C) 0-30 percent by weight of at least one further non-basic, water soluble comonomer.

Method for thickening aqueous systems

What is disclosed is a two-layered packaging material for the direct contact packing of food products, said material comprising cloth coated with a first acrylate emulsion polymer, formulated to be soft, comprising:

Two-layered packaging material for foodstuffs one layer of which

What are disclosed are a method for the reinforcement of a fibrous article with an aqueous dispersion of a resin, free of formaldehyde and acrylonitrile, comprising at least 40 weight percent of alkyl acrylates and/or methacrylates having at least 4 carbon atoms in the alkyl group; up to 57 weight percent of alkyl acrylates or methacrylates having not more than 3 carbon atoms in the alkyl group, or of styrene; less than 1 weight percent of acrylic acid or of methacrylic acid; and from 3 to 15 weight percent of a hydroxyalkyl ester of an unsaturated carboxylic acid, as well as reinforced fibrous articles made by this method and distinguished by high wet strength and by low loss of the resin binder on washing with boiling water.

Method for strengthening fibrous articles

What are disclosed are aqueous dispersions of a self-crosslinking synthetic resin, said dispersions consisting of an aqueous phase containing from 0.2 to 5 weight percent of urea and, dispersed therein, resin particles formed of a vinyl polymer comprising (a) from 52.1 to 97.9 weight percent of acrylate or methacrylate esters, vinyl esters, or styrene; (b) from 0.1 to 10 weight percent of N-methylol acrylamide or methacrylamide; (c) from 2 to 10 weight percent of an hydroxyalkyl ester of an unsaturated carboxylic acid; and (d) 0 to 27.9 weight percent of other monomers, which dispersions, on drying and condensation to form films, liberate much less formaldehyde than comparable dispersions without urea while retaining good solvent resistance.

Aqueous dispersion of a self-crosslinking resin

What is disclosed is making highly concentrated, bimodal, aqueous synthetic resin dispersions by the emulsion polymerization of ethylenically unsaturated monomers, in the presence of emulsifiers and free radical-forming initiators, by adding to a first latex containing a first dispersed synthetic resin and an aqueous phase, a second latex containing a second dispersed synthetic resin and an aqueous phase and a monomer phase containing a free-radically polymerizable monomer, and then polymerizing the monomer, the average size of the particles of said first resin differing by a factor between 2 and 15 from that of the particles of second resin, the total weight of the resins and monomers representing 100 parts by weight, and the total weight of the aqueous phases representing not more than 70 parts by weight.

Method for making aqueous dispersions of a synthetic resin

What are disclosed are aqueous dispersions of an acrylic resin which is suitable for the reinforcement of fibrous articles and is free of formaldehyde and acrylonitrile, said resin comprising (a) from 70 to 96.95 weight percent of alkyl esters of acrylic acid and/or methacrylic acid, or mixtures of such esters with styrene; (b) from 2 to 30 weight percent of an hydroxyalkyl ester of an unsaturated carboxylic acid; (c) from 1 to 10 weight percent of acrylamide or of methacrylamide; (d) from 0.05 to 3 weight percent of a crosslinking comonomer having at least two polymerizable double bonds; (e) up to 5 weight percent of an unsaturated carboxylic acid; and (f) up to 20 weight percent of one or more further monomers, as well as fibrous articles reinforced with such a resin dispersion and showing reduced loss of resin binder on dry cleaning and reduced absorption of plasticizers, and methods of making such articles.

Acrylic resin dispersions

What are disclosed are a method for making an emulsion polymer by polymerizing water insoluble free-radically polymerizable monomers, or monomer mixtures predominantly comprising such monomers, by emulsion polymerization in the presence of a polymerization initiator which is soluble in organic solvents and has at least limited solubility in water, and in the further presence of a free non-polymerizable emulsifying acid, also soluble in organic solvents, and the conversion of such an emulsion polymer by spray drying into a polymer powder which is completely soluble in organic solvents to form clear solutions from which polymer films of reduced water sensitivity can be formed.

Method of making emulsion polymers

What are disclosed are methods for making an aqueous dispersion of a synthetic resin copolymer, said dispersion having high pigment binding capacity and adaptable to use in the preparation of printing inks or pastes, said copolymer comprising a predominant amount of water insoluble monomers together with from 3 to 8 percent by weight of an acid component which is a water soluble acid or salt, which method comprises gradually adding said water insoluble monomers, together with a portion of said acid component, to an aqueous medium containing the balance of the acid component in the form of a dissolved water soluble salt; aqueous synthetic resin dispersions made by these methods; and printing inks comprising such an aqueous synthetic resin dispersion which has been neutralized and combined with such an amount of an organic solvent as converts the dispersion into a solution or colloidal dispersion of the synthetic resin.

Resin dispersions having high pigment binding capacity

An aqueous artificial resin dispersion, comprising an aqueous phase and a water-insoluble disperse phase formed from particles containing a copolymer formed in substantial part from a water insoluble or slightly soluble first monomer, wherein the copolymer additionally is formed from a second monomer of the formula ##STR1## wherein R represents hydrogen or methyl, R' represents hydrogen or an alkyl radical with 1 to 12 C-atoms, R' represents an alkyl radical with 7 to 20 C-atoms, and M represents a proton, an alkali metal ion, or an ammonium ion, with the proviso that the aqueous phase is free of low molecular weight, ionic emulsifying agents. Such dispersions are particularly well suited for continuous emulsion polymerization because of the highly stable monomer emulsions formed by mixtures produced according to the invention.

Aqueous artificial resin dispersions free of emulsifying agents

What is disclosed are aqueous dispersions of a hydrophilic copolymer prepared by polymerizing, in an aqueous medium, a monomer mixture comprising a member selected from the group consisting of lower alkyl acrylates and methacrylates, a compound of the formula ##STR1## wherein R is hydrogen or methyl, R.sup.1 is hydrogen or alkyl having 1 to 4 carbon atoms. Y is oxygen or --NR.sup.2 --, R.sup.2 is hydrogen or alkyl having 1 to 4 carbon atoms, and n is an integer from 1 to 25, up to 8 percent, by weight of the copolymer, of a member selected from the group consisting of copolymerizable carboxylic acids and salts of such acids, and at least one monomer capable of crosslinking said copolymer, as well as methods for making said dispersions and using them to impart a hydrophilic finish to fibers and fabrics.

Growing community of inventors

Bickenbach, Germany

Herbert Fink