Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1996-12-02
1999-05-11
Merriam, Andrew E. C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
523116, 523117, 524533, 524358, 522 47, 522902, 606 92, C08L33/00
Patent
active
059028394
ABSTRACT:
Orthopedic bone cements of low porosity, prepared by mixing together at least two liquid components under conditions that allow only minimal exposure to air, are disclosed. In a preferred system, each liquid component consists essentially of a solution of a linear (non-crosslinked) polymer or copolymer of methyl methacrylate (PMMA) dissolved in a non-crosslinking methyl methacrylate (MMA) monomer, with one such solution also containing an activator and a polymerization inhibitor and a second solution containing an initiator as well as a polymerization inhibitor. No reinforcing fillers are present, although a small amount (no more than 12% by weight of the total cement composition) of a radiopacifier may be included in the composition. Since polymerization is initiated by mixing together two or more liquid solutions, and such mixing may be performed in a mixing chamber in which no air is required or is introduced during the mixing operation, prior problems of cement porosity and weakness resulting from air entrapment are avoided or greatly reduced while the reliability and reproducibility of the mixing operation are greatly improved.
REFERENCES:
patent: 4308190 (1981-12-01), Walkowiak et al.
patent: 4404327 (1983-09-01), Crugnola et al.
patent: 4547531 (1985-10-01), Waknine
patent: 4554686 (1985-11-01), Baker
patent: 4629746 (1986-12-01), Michl et al.
patent: 5219897 (1993-06-01), Murray
patent: 5276070 (1994-01-01), Arroyo
patent: 5334626 (1994-08-01), Lin
patent: 5554665 (1996-09-01), Tateosian et al.
Duray Steven J.
Gilbert Jeremy L.
Lautenschlager Eugene P.
Monaghan Peter
Wixson Richard L.
Merriam Andrew E. C.
Northwestern University
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