Bayer Aktiengesellschaft

Metzeler Schaum Gmbh

Gunther Baatz

Manfred Dahm

Walter Schafer

Kurt Findeisen

Manfred Bock

Gert Jabs

Christian Wegner

Artur Haus

Franz Riemhofer

Klaus-Dieter Conrad

Kurt Triebeneck

A process for the production of aqueous suspensions containing from 35 to 60% by weight of microcapsules by interfacial polyaddition from polyisocyanates and H-active compounds, wherein

Concentrated microcapsule suspensions for reaction copying papers

Method for manufacturing composite foam articles from foam material flakes, polyurethane binders and additional solid components which cause a modification or change of the properties of foam material by mixing and hardening the mixture under pressure. The additional solid components are admixed in the form of an aqueous dispersion and/or aqueous solution thereby introducing and admixing them without difficulty and permitting the manufacture of composite foam materials with different properties as required.

Method for the manufacture of composite foam materials

Pressure-sensitive copying paper containing a solution of a dye-precursor agent in microencapsulated form, wherein the dye-precursor agent is dissolved in a hydrophobic organic solvent and encapsulated in capsules composed of the polyaddition product of a diisocyanate of Formula (I) ##STR1## wherein R represents a divalent aliphatic radical, and a diamine.

Pressure-sensitive copying paper sheets

Microcapsules and a process for the production of these microcapsules the walls of which consist of polycondensates of a film-forming aliphatic polyisocyanate containing at least one biuret group or polyaddition products thereof with a chain-extending agent.

Microencapsulation with modified aliphatic polyisocyanates

Carbonless copying papers of which the donor layer contains microcapsules of a solution of dyestuff precursors in organic solvents as core material and polycarbodiimides as shell material.

Carbonless copying papers

Production of microcapsules, wherein a film-forming polycarbodiimide with functional terminal isocyanate groups is dissolved in the core material or in an inert solvent and a miscible core material is added and the resulting organic phase is introduced into an immiscible liquid phase which contains a dissolved catalyst for isocyanate reactions, and the microcapsules formed are isolated after the reaction of the shell-forming polymer.

Growing community of inventors

Cologne, Germany

Gunther Baatz