Patent ID: 8865777

Claim:
A kit for producing bone cement, the kit comprising at least a paste A and a paste B, wherein: (a) the paste A contains: at least one monomer (a1) for radical polymerization; at least one polymer (a2) insoluble in the monomer (a1); at least one polymer (a3) soluble in the monomer (a1); and at least one radical polymerization initiator (a4); wherein a weight ratio of the at least one polymer (a2) insoluble in the monomer (a1) to the at least one polymer (a3) soluble in the monomer (a1) is at least 2 to 1, and wherein an amount of the polymer (a2) insoluble in the monomer (a1) is in a range of 20% to 70% by weight relative to a total weight of paste A; and (b) the paste B contains: at least one monomer (b1) for radical polymerization; at least one polymer (b2) soluble in the monomer (b1); at least one accelerator (b3) soluble in the monomer (b1); and optionally a polymer (b4) insoluble in the monomer (b1), wherein a maximum quantity of the polymer (b4) insoluble in the monomer (b1) is 5% by weight, relative to a total weight of the paste B; and wherein a weight ratio of the polymer (b4) insoluble in the monomer (b1) to the at least one polymer (b2) soluble in the monomer (b1) is no more than 0.2; wherein a fraction of paste A in the kit is 30%-70% by weight and a fraction of paste B in the kit is 30%-70% by weight relative to a total weight of paste A and paste B.