Anti-virus agent and method for treatment of viral infection

A process of preparing a copolymer comprising an acrolein-derived segment and a polyalkylene glycol oligomer comprising:

• adding a first aqueous solution comprising an acrolein having an acrolein concentration of no more than 50% w/w by weight of the first aqueous solution to a second aqueous solution comprising polyethylene glycol and at least 10% w/w water by weight of the second aqueous solution;
• thereby forming a third aqueous solution;
• and
• polymerizing the acrolein under conditions of alkaline catalysis at a pH no more than 12 in the third aqueous solution, and thereby forming a copolymer, wherein:
• the molecular weight of the polyalkylene glycol is from 200 to 600 Daltons and the copolymer has a molecular weight of no more than 1000 Daltons;
• the second aqueous solution has a pH of no more than 12.0;
• the third aqueous solution comprises at least 20% w/w water by weight of the third aqueous solution;
• and
• the copolymer has a weight ratio of polyalkylene glycol:acrolein of at least 4:1.