FLUID CONDUIT AND PROCESS THEREFOR

摘要

A conduit such as a nozzle having its surface or a portion of its surface coated with a thin fluid-repellent layer is disclosed. The layer comprises or is produced from a fluorocarbon silane or a substantially aqueous emulsion. The emulsion comprises or is produced from (1) a fluorocarbon silane or its hydrolyzate, (2) water, and (3) optionally a surfactant, a silicon compound, a catalyst, or combinations of two or more thereof where the fluorocarbon silane has the formula Rf-(CH2)p-Si{-(O-CH2CH2)n-OR<1>}3 and the silicon compound can be a silicate or an organoalkoxysilane; Rf is a C3-18 perfluoroalkyl group or combinations of two or more thereof; each R<1 >is independently one or more C1-3 alkyl groups; p is 2 to 4; and n is 2 to 10.