Bayer Aktiengesellschaft

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Bayer Materialscience Ag

Horst Stepanski

Walter Meckel

Otto Ganster

Jose Colinas-Martinez

Klaus Konig

Richard Kopp

Hanns-Peter Muller

Heinrich Hess

Bernhard Jansen

Gunter Arend

Eduard Hansel

Joachim Werner

Rainer Trinks

Gerhard Grogler

Walter Schafer

Heinrich Konigshofen

Rudolf Hombach

Rüdiger Musch

Heinz-Werner Lucas

Andreas Kilzer

Klaus Dilger

Marcus Petermann

Alexander Pross

Eckhardt Weidner

Guenter Arend

Hans Tups

Gerhard Groglerl

Bernard Jansen

Stefan Böhm

Frank Mund

Process for the production of polyurethane particles

The invention relates to a process for bonding surfaces with isocyanate-containing prepolymers having an isocyanate group content of less than 1.8% by weight, based on the prepolymer, and an average molecular weight MW.sub.n of at least 4,500 in which (a) the prepolymers are prepared by the reaction of (i) polyester diols prepared from dodecanedioic acid and even-numbered alkane diols containing at least 6 carbon atoms and (ii) diisocyanates; (b) the prepolymer is applied as a hotmelt adhesive at a temperature of 80 to 160.degree. C. by spin-spraying onto at least one surface to be bonded; and (c) the treated surface is brought into intimate contact with a second surface to be bonded.

Hotmelt bonding process

Disclosed herein is a two-component polyurethane adhesive containing an isocyanate component a), an active hydrogen containing component which is stable against demixing b), optionally a catalyst for the reaction of a) with b) and optionally an auxiliary agent and an additive, characterized in that an active hydrogen containing component which is stable against demixing b) contains at least one hydroxyl group-containing low molecular weight chain lengthening agent having at least one C-C double bond or C-C triple bond and having a molecular weight of at least 86 and a functionality of at least 2 and containing no carboxyl groups.

Two-component polyurethane adhesives

Disclosed herein is an adhesive and a process for bonding with the adhesive containing an isocyanate prepolymer a), an isocyanate reactive component b) and a catalyst for the reaction of a) and b), characterized in that the catalyst comprises a compound corresponding to the following formula ##STR1## wherein R.sup.1 and R.sup.2 may be identical of different and denote an alkyl group having 1 to 4 carbon atoms,

Process for bonding substrates of glass fiber reinforced polyester resin

Composite anchors for use in concrete or masonry are described. The anchor is a rod sheathed in a material which has been impregnated with a moisture-curing polyurethane resin.

Composite anchor incorporating a water-curing polymer composition

The invention relates to a moisture-curing, NCO-reactive polyurethane hotmelt adhesive composition to a process for its production and to its use as an adhesive wherein the hot-melt adhesive characterized by a reaction product obtainable by reaction of:

Moisture-curing, NCO-reactive polyurethane hotmelt adhesive composition

This invention relates to crystalline, isocyanate group-containign hot melt adhesives based on

Hot melt adhesives

Improved two-component polyurethane adhesives contain an isocyanate and a stabilized epoxide and at least one isocyanate-reactive compound.

Epoxide-containing two-component polyurethane adhesives

The present invention is directed to a reactive polyurethane mixture comprising:

Polyurethane-based one-component reactive adhesives

The present invention is directed to a polyurethane-based reactive adhesive comprising A) at least one polyisocyanate, B) at least one polyol, and C) at least one polyamine C which is a polyether amine containing at least two amino groups, at least one phenyl group and recurring polyoxyalkylene units.

Polyurethane-based reactive adhesives in which the isocyanate is

The present invention is directed to a predominantly linear polyurethane adhesive which can be cross-linked by heat and is at least partially crystalline at room temperature, comprising:

Storage stable polyurethane adhesives

Growing community of inventors

Leverkusen, Germany

Horst Stepanski