Siloxane and a method for preparing the same

A method for preparing a siloxane represented by the following formula (1):

• wherein R1 is a hydrogen atom or a methyl group, R2 is a monovalent hydrocarbon group having 1 to 6 carbon atoms, L is a divalent hydrocarbon group which has 2 to 10 carbon atoms and may have one or more ether bonds, and A is a group represented by the following formula (2) or (3):
• wherein n is an integer of 1 to 100, a is an integer of 0 to 10, b is an integer of 0 to 10, and c is an integer of 0 to 10, provided that a+b+c is 2 or more, and R is, independently of each other, a monovalent hydrocarbon group having 1 to 10 carbon atoms,
• the method comprises a step of hydrosilylation-reacting a compound represented by the following formula (5) and having unsaturated groups at the terminals:
• wherein R1 and R2 are as defined above, R3 is a hydrogen atom or a methyl group, and L′ is a single bond or a divalent hydrocarbon group which has 1 to 8 carbon atoms and may have one or more ether bonds,
• with a hydrogen siloxane represented by the following formula (6) or (7):
• wherein R, n, a, b and c are as defined above,
• to obtain the siloxane represented by the aforesaid formula (1).