Th. Goldschmidt Ag

Hartmut Gomm

Joachim Giersberg

Dirk Naumann

Erich Ruf

Hans-Gunter Krohm

Gerd Dembinski

Glass vessels are coated by spraying a solution containing 86 to 1,290 g/L of (HO).sub.x Sn(C.sub.2 O.sub.4).sub.y on the 500.degree. to 600.degree. C. hot outer surface of the vessels. The solution may contain oxalic acid, HCl and a portion of the (HO).sub.x Sn(C.sub.2 O.sub.4).sub.y compound may be substituted by a compound (OH).sub.2 SnCl.sub.2. The coatings are uniform.

Preparation and method for coating glass vessels

Glass vessels are coated by spraying a solution containing 100 to 1,000 g/L of (OH).sub.2 SnCl.sub.2 on the 500.degree. to 600.degree. C. hot outer surface of the glass vessels. The solution may contain oxalic acid and a portion of the (OH).sub.2 SnCl.sub.2 compound may be substituted by a compound (HO).sub.x Sn(C.sub.2 O.sub.4).sub.y, wherein y is 0.2 to 3.8, y is 1.9 to 0.1 and (2y+x)=4. The coatings are uniform.

Electrically conductive halide doped tin-IV-oxide is disclosed which contains divalent tin in an amount not exceeding 2% by weight and also contains 0.1 to 2.5% by weight, particularly 0.1 to 1.0% by weight, of halide. Methods for producing the tin-IV-oxide are also disclosed. The product is suitable for imparting electric conductivity in the form of a filler or pigment to a variety of products such as plastics, lacquer, varnish, paint, paper, textiles and toners, without discoloration of the products.

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Muhlheim, Germany

Hartmut Gomm