Surgery – Truss – Perineal
Patent
1975-06-09
1977-02-01
McNeill, G.E.
Surgery
Truss
Perineal
26099811, A61L 1507
Patent
active
040057062
ABSTRACT:
New types of fast setting zinc oxide-polycarboxylic acid adhesive cements are disclosed as well as certain improved products the use of these cements makes possible.
Certain new types of cement have been disclosed by Dennis Clifford Smith (British Pat. No. 1,139,430, Jan. 8, 1969) and by Alan Donald Wilson and Brian Ernest Kent (British Pat. No. 1,316,129, May 9, 1973). These cements were designed for dental use. The former involves the reaction of ZnO with 40-60% aqueous polyacrylic acid of molecular-weight 15000-150000. (I have discovered that polymethacrylic acid is substantially the equivalent of polyacrylic acid in these cements.) The polyacrylic acid solution is relatively expensive. The latter cement involves a high temperature fusion as well as the polyacrylic acid. While these products are undoubtedly excellent for dental use and such use can tolerate their high cost, certain of my uses require a much cheaper product and also a dry, powdery solid acid that is quick to dissolve. It is difficult and expensive to produce such a form of polyacrylic acid. I have discovered very effective adhesive cements that are much cheaper, more readily available in a form convenient to use and controllably settable. My adhesive cement is also more adhesive shortly after wetting and avoids the possibility of skin reaction with use of polyacrylic acid due to the presence of some acrylic acid of a low degree of polymerization especially where large areas of skin are contacted and where the user is subject to repeated contact with the cement.
REFERENCES:
patent: 2904526 (1959-09-01), Uelzmann
patent: 3607262 (1971-09-01), Ueda et al.
patent: 3708290 (1973-01-01), Verhille et al.
patent: 3751391 (1973-08-01), Smith
patent: 3776724 (1973-12-01), Usmani
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