| 摘要 |
<p>1457401 Polyurethane coating compositions TH GOLDSCHMIDT 6 Feb 1975 [6 Feb 1974] 5161/75 Headings C3R and C3N [Also in Divisions B2 and F2] A curable foundation layer for coating pipes comprises (all percentages are by weight), Polyether based on polyoxypropylene ... 20% Anthracene oil tar (Kraemer-Sarnow softening pt. 25‹ C.) ... ... ... 15% Zeolite (alkaline earth aluminosilicate) in 50% castor oil paste ..... 4À7% Dibutyl tin dilaurate ..... 0À2% Triethylene diamine ..... 0À1% Pyrogenic silica ..... 1À0% Barytes ..... 44% Diphenylmethane diisocyanate ... 15% The foundation layer may be cured at 90‹ C. A curable covering foam composition for coating on the foundation layer comprises (all percentages are by weight), Bentonite/anthracene oil tar water-in-oil emulsion (having a water content of 5%) ..... 15% Castor oil ..... 5% Polyetiier based on polyoxypropylene ... 15% Polyoxyalkylene-polysiloxane block copolymer ... ... ... ... 1À5% Dimethyl piperidine ... ... ... 0À5% Stone powder ... ... ... ... 43% Diphenylmethane diisocyanate ... ... 20%</p> |
