PURPOSE: To obtain a one-part solventless conformal coating compsn. suitable for coating printed circuits by compounding a diorganovinyl-endblocked polydiorganosiloxane, an organosiloxane acting as a crosslinker, a platinum catalyst, etc. ;CONSTITUTION: (A) a diorganovinyl-endblocked polydiorganosiloxane having 6C or lower hydrocarbon or fluoroalkyl groups as org. groups and a viscosity (25°C) of 0.3-1 Pa.s, (B) an organosilicon compd. which has, on average, at least 3 Si-bonded hydrogen atoms and in which Si atoms not bonded to hydrogen atoms are bonded to oxygen atoms and/or the above-mentioned org. groups, (C) a platinum catalyst (e.g. chloroplatinic acid), (D) a polysiloxane having Si-bonded hydroxyl groups, Si-bonded vinyl groups, siloxane units, and 15 or less silicon atoms bonded to alkyl groups, etc., or to oxygen atoms, (E) a silane having an epoxy-contg. org. group, and (F) an acetylenic alcohol are compounded in a specified ratio.;COPYRIGHT: (C)1995,JPO
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