Abstract: Surgical infusion solutions, useful particularly as blood plasma substitutes, comprising physiological solution of polymers or copolymers formed from ethyleneglycol acrylates and methacrylates, acrylamide, methacrylamide and acrylamides and methacrylamides substituted on the nitrogen atom with either one or two lower alkyl radicals and/or one or two hydroxyalkyl or dihydroxyalkyl radicals containing 1 to 6 carbon atoms and mixtures of these polymeric materials dissolved in a physiological solvent therefor. The polymerization or copolymerization is carried out by solution polymerization methods and the polymeric material is precipitated by mixing it in a suitable non-solvent therefor, but which is miscible with the polymerization solvent.

Abstract: A hydrophobic polymer is hydrophilized by polymerizing thereon a compound having the formula ##EQU1## where R.sub.5 is hydrogen or lower alkyl, R.sub.4 is hydrogen, lower alkyl, halogen of atomic weight 9 to 80, phenyl or cyano, R.sub.6 is alkylene or haloalkylene of 2 to 4 carbon atoms, R.sub.7 is alkylene of 3 to 6 carbon atoms, n is an integer of 1 to 4, m is an integer of 2 to 5 and R.sub.1, R.sub.2 and R.sub.3 are lower alkyl, phenyl or tolyl and thereafter hydrolyzing off the silyl groups. Silylated copolymers can also be prepared to form the hydrophilic coating.