The invention discloses a
disiloxane compound terminated by trialkyl
silicon ethyl and
alkyne enol and a method for preparing the same. The method comprises the following steps: synthesizing a
siloxane hydride intermediate from dihydro-terminated
disiloxane and
vinylsilane by the
molar ratio of (1:1) in the presence of the Wilkinson's catalyst under the condition of
hydrosilylation, wherein, the amount of the Wilkinson's catalyst is 200ppm of the
mass of the dihydro-terminated
disiloxane as the reactant; and synthesizing the
alkyne-
enol-terminated disiloxane compound from the
siloxane hydrideintermediate and alkynyl-containing alkynol by the
molar ratio of (1:1) in the presence of the Speier's catalyst, wherein, the amount of the Speier's catalyst is 50ppm to 1,000ppm of the total
mass ofthe reactant. The disiloxane compound of the invention is alkynol-modified
siloxane with the pH value range of resisting acid / alkali
decomposition being 2 to 12; and the
retention rate with the molarfraction being more than or equal to 50% exceeds far beyond 24 hours, wherein, the
retention rate of 20% of the invention with the
molar fraction being more than or equal to 50% exceeds 1 year underthe equivalent conditions.