| 摘要 |
<p>1,158,167. Coating surfaces. JOHNS-MANVILLE CORP. 22 Sept., 1966 [23 Oct., 1965], No. 42271/66. Heading B2K. A method of coating an asbestos-cement article with a silicate coating composition comprises pre-treating before the application of the silicate coating with an application of a dilute aqueous solution of ammonium phosphate, dibasic ammonium phosphate, acid aluminium phosphate, or cupric ammonium sulphate, or a mixture thereof, containing between 5%-10% solids by weight, in an amount of 2-20 grams of solution per square foot of the surface The silicate may comprise a mixture of sodium silicate, potassium silicate, zinc oxide and kaolin clay. The solutions may be applied by spray, roller or brush.</p> |
