| 摘要 |
<p>1328280 Satin white BIANCO SATIN SRL 10 Dec 1970 [10 Dec 1969] 58712/70 Heading C4A Satin white is produced by the reaction of calcium hydroxide with aluminium sulphate and the product is neutralized with an organic C 12 -C 20 aliphatic acid or a salt, ester or amide thereof, the resulting calcium salt being retained in the satin white. The pigment may then be further neutralized with ammonium sulphate to form ammonium hydroxide and calcium sulphate which are also retained. The initial reaction may be carried out in the presence of an inorganic dispersant, e.g. sodium tripolyphosphate. An organic dispersant, e.g. a polyacrylate, may be added thereafter prior to the addition of the acid or acid derivative. Stearic acid or stearin is preferred.</p> |
