Liquid butadiene compound with both ends modified, method for preparing same, and use of same

A compound preparation method comprising:

• a first step of preparing a radical compound by subjecting an initiator and a monomer to a reaction;
• a second step of preparing a chain transfer agent radical by subjecting the prepared radical compound to a reaction with a chain transfer agent represented by Formula 3 below;
• a third step of forming an intermediate radical compound with a single end modified by subjecting the prepared chain transfer agent radical and the monomer to a polymerization reaction;
• and
• a fourth step of forming a compound with both ends modified by subjecting the formed intermediate radical compound to a reaction with a chain transfer agent represented by Formula 3 below;
• R′x(RO)3−x—Si—(CH2)a—Sc—(CH2)b—Si—(OR)3−xR′x <Formula 3>
• wherein in Formula 3 above,
• R and R′ may each be same or different and are selected from hydrogen or (C1-C6) alkyl;
• x is an integer selected from 0 to 2;
• a and b are each independently an integer selected from 1 to 5;
• and
• c is an integer selected from 1 to 9.

A rubber composition for tire, comprising a rubber polymer;

• and a compound represented by Formula 1 below as active ingredients:
• R′x(RO)3−x—Si—(CH2)a—Sc—(M)—Sd—(CH2)b—Si—(OR)3−xR′x <Formula 1>
• wherein in Formula 1 above,
• R and R′ may each be same or different and are selected from hydrogen or (C1-C6) alkyl;
• x is an integer selected from 0 to 2;
• a and b are each independently an integer selected from 1 to 5;
• c and d are each independently an integer selected from 1 to 9;
• and
• M is a polymer chain comprising one or two or more diene monomers.