Siloxane compound and a method for preparing the same

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

• wherein R1 is a hydrogen atom or a methyl group, R2 is a hydrogen atom or a monovalent hydrocarbon group having 1 to 6 carbon atoms, L1 is a divalent hydrocarbon group having 1 to 5 carbon atoms, L2 is a divalent hydrocarbon group having 2 to 10 carbon atoms and which may contain an ether bond, and A is a polysiloxane unit 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, R and R3 are, independently of each other, a monovalent hydrocarbon group having 1 to 10 carbon atoms, and the site marked with ** is a binding position to the group L2 in formula (1),
• wherein the method comprises a step of reacting a siloxane compound having an amino group and represented by the following formula (5):
• wherein R2, L2 and A are as described above, with a lactone compound having 2 to 6 carbon atoms to obtain a siloxane compound represented by the following formula (4):
• wherein R2, L1, L2 and A are as described above, and a step of reacting the siloxane compound represented by said formula (4) with a (meth)acrylic acid halide to obtain the compound represented by said formula (1).