The invention provides a kit for producing bone cement. Said kit comprises atleast one paste Aand one paste B, whereby(a) paste A contains(a1) at least one monomer for radical polymerisation；(a2) at least one polymer that is insoluble in (a1)；(a3) at least one polymer that is soluble in (a1)； and(a4) at least one radical polymerisation initiator；whereby the weight ratio of the at least one polymer (a2) that is insoluble in(a1) to the atleast one polymer (a3) that is soluble in (a1) is at least 2 to 1； and(b) paste B contains(b1) at least one monomer for radical polymerisation；(b2) at least one polymer that is soluble in (b1)； and(b3) at least one accelerator that is soluble in (b1),(b4) optionally a polymer (b4) that is insoluble in (b1),whereby the maximal quantity of polymer (b4) that is insoluble in (b1) is 5 %by weight,relative to the total weight of paste B； andwhereby the weight ratio of polymer (b4) that is insoluble in (b1) to the atleast one poly-mer (b2) that is soluble in (b1) is no more than 0.2.
