Basf Aktiengesellschaft

Josef Lamprecht

Gregor Ley

Helmut Barzynski

Arend Werner

Peter Neumann

Knut Oppenlaender

Dieter Horn

Erich Penzel

Rainer Strickler

Frank P Woerner

Gerhard Turznik

Harald Mahnke

Friedrich Kraus

Hanshelmut Kaeppel

Hans J Geelhaar

Eduard Heim

A photosensitive recording material for recording information by means of a local change in the optical properties of a recording layer under the action of light having a high energy density, and a process for its preparation.

Recording material containing a layer of polymer particles and a

Photosensitive recording material

Resilient foams based on melamine resins are prepared by foaming an aqueous solution which contains a melamine/formaldehyde precondensate, an emulsifier, a volatile blowing agent and a curing agent and then curing the foam. In this process, from 0.2 to 4% by weight of an alkali metal, alkaline earth metal or aluminum salt of an organic, preferably polybasic acid, of a polyphosphoric acid or of a boron acid are added to the aqueous solution.

Preparation of resilient melamine foams

An improved goniophotometer for determining the gloss and/or haze of a surface is disclosed. The device comprises a light source, one or more convex lenses for illuminating the surface, a field stop in the image plane of the light source, a light detector, and a rotatably mounted mirror located between the surface and the field stop. Whereas prior art goniophotometers translated the field stop through the reflected beam in order to measure the beam profile, such an arrangement required an additional positive lens placed after the field stop for uniform illumination of the (fixed) light detector in order to avoid errors in measurement resulting from locally varying sensitivity of the detector. By using a rotationally scanned mirror before the field stop, the need for means to translate the field stop as well as the need for the additional positive lens is made unnecessary.

Goniophotometer for measuring the gloss and/or light diffusion of

Films obtained from paints based on conventional aqueous polymer dispersions exhibit improved wet adhesion to alkyd resin-coated substrates and improved blocking resistance if the paints contain polyglycidylamines which carry 2 or more glycidyl groups which are bonded to hydrogen-free nitrogens.

Aqueous paints which contain polyglycidylamines as additives

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Frankenthal, Germany

Josef Lamprecht