Method for manufacturing hydrophilic silicone macromer

A method for manufacturing a hydrophilic silicone macromer, comprising the steps of:

• performing a ring-opening insertion, wherein a cyclic siloxane and a cyclic hydrogen siloxane are subject to a ring-opening reaction, and then are inserted into a linear polysiloxane having a terminal reactive hydrogen to form a reactive hydrogen-terminated polysiloxane having a silicon-hydrogen (Si—H) bond, in which the terminal reactive hydrogen is derived from a hydroxyl group or an amino group;
• performing a hydrosilylation between the Si—H bond of the reactive hydrogen-terminated polysiloxane and a C═C bond of a hydrophilic monomer by using a rhodium-containing catalyst to form a reactive hydrogen-terminated polysiloxane intermediate having a hydrophilic side chain, wherein the hydrophilic monomer has an amide group or a phosphoryl choline group;
• and
• performing an end-capping reaction between the terminal reactive hydrogen of the polysiloxane intermediate and an electrophilic group of an ethylenically unsaturated compound to form the hydrophilic silicone macromer.