Basf Aktiengesellschaft

Franz Matejcek

Fritz E Kempter

Werner Neubach

Maximilian Angel

Rudolf Schuhmacher

Gerd Busse

Klaus Flory

Aqueous polymer dispersions obtainable by incorporating into an aqueous starting dispersion containing

Non woven material containing aqueous polymer dispersions

A process is provided for the preparation of an aqueous polymer dispersion which entails incorporating one or more divalent metals of magnesium, calcium or zinc in the form of an oxide, hydroxide, carbonate or bicarbonate, or in the form of a mixture of these basic salts into an aqueous starting dispersion containing a polymer A as the dispersed phase, an effective amount of an emulsifier and water as the remainder, at a temperature below the boiling point of pure water and above the glass transition point of the polymer A, wherein polymer A consists essentially of monomers, a) which are one or more .alpha., .beta.-monoethylenically unstaturated mono- or di-carboxylic acids containing from 3 to 5 carbon atoms, an anhydride o these acids or a mixture thereof; and monomers b) being one or more other copolymerizable monomers.

Aqueous polymer dispersion having divalent metal salt(s) incorporated

Aqueous nonwoven binders that give reduced formaldehyde emission on curing are based on condensation products of urea or derivatives thereof, formaldehyde and glyoxal in a molar ratio, based on the solid binder, of from 1.5 to 2.5 moles of formaldehyde and from 0.1 to 0.5 mole of glyoxal per mole of the total urea used.

Preparation of aqueous nonwoven binders of low formaldehyde emission on

Webs composed of inorganic or organic fiber material are bonded with a cured resin mixture consisting essentially of

Mineral and textile webs bonded with a cured resin mixture

A low-formaldehyde binder consists essentially of

Growing community of inventors

Lambsheim, Germany

Franz Matejcek