Beiersdorf Ag

Tesa Ag

Peter Gleichenhagen

Andreas Westphal

Annemarie M&uuml;ller

Peter Jauchen

Robert Meyer

Manfred Spies

Dietrich Schulte

Herbert Knolle

Ingrid Wesselkamp

Gunther Bonitz

Ekkehard Behrend

Annemarie Müller

A process for preparing hot-melt pressure-sensitive adhesives from aqueous dispersions based on polyacrylate, and pressure-sensitively adhesive articles produced therefrom, which comprises producing highly concentrated aqueous dispersions with polymer contents between 68% by weight and 87% by weight of gel-free, molecularly-dispersely meltable polymer particles with an at least bimodal size distribution in size ranges between 0.5 &#x3bc;m and 1000 &#x3bc;m &#xd8;.

Preparation of acrylic hot-melt pressure-sensitive adhesives from aqueous disperse systems

Use of a fixing aid

Method for producing release agent dispersions for glue-resistant layering on material in the form of surface areas, sheets or strips, especially for the production of surface coatings on the reverse side of pressure sensitive tapes et al, characterized in that copolymers are produced by radical polymerization in an aqueous dispersion from the monomer mixtures described herein.

Process to produce separation dispersions and their use

Use of a paper carrier for the production of a repulpable carton sealing tape which is finished on one side with a repulpable self-adhesive composition and on the other side with a repulpable silicone-free release based on a copolymer of amide/styrene together with a film-forming agent.

Repulpable carton sealing tape

Repulpable contact adhesive based on a graft polymer in which 3-20% by weight of vinyl compounds having sulphonic acid salt groups are grafted onto a copolymer of (meth)acrylates and (meth)acrylic acid and which is rendered tacky by means of water-soluble plasticizers.

Repulpable contact adhesive

Residuelessly redetachable contact-adhesive sheet-like structures wherein are provided approximately calotte-shaped bonding sites which are up to about 600 .mu.m in diameter at the base where the calottes stick to the sheet-like structure and which are produced by screen or gravure printing using high-solids dispersion of adhesive substance.

Residuelessly redetachable contact-adhesive sheetlike structures

A water-soluble, pressure-sensitive, self-adhesive composition comprising a limited class of copolymers and a specific plasticizer which is completely neutralized with potassium hydroxide. The composition comprises 30 to 80 parts of a copolymer of 70 to 88% by weight acrylic acid butyl ester and 12 to 30% by weight vinyl carboxylic acid. The ester may be substituted in an amount of 3 to 12% by weight by acrylic acid-2-ethylhexyl ester and/or 5 to 25% by weight by a mixture of vinyl acetate and fumaric acid dialkyl ester. The composition also includes 20 to 70 parts by weight of a water soluble plasticizer which is ethoxylated phenol (or alkylphenol), ethoxylated alkyl mono- or diamine, or an ethoxylated alkyl ammonium compound. The composition is particularly useful for the production of adhesive tapes and similar articles useful in the papermaking industry for maintaining paper webs in continuous form.

Water-soluble, pressure sensitive, self-adhesive compositions and

A polymer composition is disclosed which can be sprayed or otherwise thinly coated on an open wound to serve as a protective bandage. The composition comprises: A. 10 to 30% by weight of isobutene relative to total monomer weight; B. 5 to 85% by weight of total monomer of one or more esters of acrylic or methacrylic acid and one or more normal or branched, monovalent, primary or secondary aliphatic alcohols having 1-4 carbon atoms; and C. 5 to 85% by weight of total monomer of one or more maleic acid monoalkyl esters having 1-12 carbon atoms in the monoalkyl portion of the molecule.

Growing community of inventors

Hamburg, Germany

Peter Gleichenhagen