公开(公告)号：DE2924241A1

公开(公告)日：1981-01-08

申请号：DE2924241

申请日：1979-06-15

Applicant: BASF AG

Inventor： LAMPRECHT JOSEF DIPL PHYS DR ,  LEY GREGOR DIPL CHEM DR

IPC: G01N21/57

Abstract: 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.

公开(公告)号：DE2740591A1

公开(公告)日：1979-03-22

申请号：DE2740591

申请日：1977-09-09

Applicant: BASF AG

Inventor： GEELHAAR HANS JOACHIM DIPL CHE ,  LAMPRECHT JOSEF DIPL PHYS DR ,  LEY GREGOR DIPL CHEM DR

IPC: B05D7/26 ,  B05D1/36

Abstract: High gloss, cover paints contg. inorganic pigments and aq. polymer dispersions, as binders, are applied in >=2 layers. At least one primer layer with pigment vol. concn. 15-95% is applied first and coated with a top layer having pigment vol. concn. 0-10%. The aq. dispersion used as binder for top layer contains a water-insol. copolymer with vitreous transition temp. 0-40 (5-25) degrees C and =25 (30) wt. % latex particles of average dia. 300 (50-200) nm. The paints are used for coating internal or external walls. Degree of gloss of top layer exceeds 64% (e.g. 72% at measuring angle 20 degrees) compared with 60% with standard dispersions paints, and increases inversely to inorganic pigment concn. in top layer.