Organopolysiloxane and making method

An organopolysiloxane containing at least a sulfide-containing organic group, a long-chain alkyl group, and a hydrolyzable group, represented by the average compositional formula (1):

• (A)a(B)b(C)c(D)d(R1)eSiO(4−2a−b−c−d—e)/2 (1)
• wherein A is a sulfide-containing divalent organic group, B is an alkyl group of 5 to 10 carbon atoms, C is a hydrolyzable group and/or hydroxyl group, D is a mercapto-containing organic group, R1 is an alkyl group of 1 to 4 carbon atoms, or an aryl group of 6 to 10 carbon atoms, a, b, c, d and e are numbers in the range:
• 0<2a<1, 0<b<1, 0<c<3, 0≦d<1, 0≦e<2, and 0<2a+b+c+d+e<4.