A process for preparing poly-C.sub.2-C.sub.4-alkylene glycol mono(meth)acrylic acid esters by reacting (meth)acrylic anhydride with a poly-C.sub.2-C.sub.4-alkylene glycol carrying at least one OH group in the presence of abase having a solubility in the poly-C.sub.2-C.sub.4-alkylene glycol of not more than 10 g/l at 90.degree. C.

 
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> Methods of producing water-soluble, non-turbid copolymers of at least one water-soluble N-vinyllactam and at least one hydrophobic comonomer

> Porous ceramic, polymer and metal materials with pores created by biological fermentation
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