Polymers of unsymmetrically substituted 1,4-dioxane-2,5-diones

Details Polymers of unsymmetrically substituted 1,4-dioxane-2,5-diones Polymers of unsymmetrically substituted 1,4-dioxane-2,5-diones

1975-03-14

1977-07-05

Czaja, Donald E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

2603402, C08G 6308

Patent

active

040339386

ABSTRACT:
Unsymmetrically 3,6-substituted 1,4-dioxane-2,5-diones may be polymerized to give living-tissue absorbable, hydrolytically degradable surgically useful polymers. These polymers have predominantly regular rather than random spacings of side chains, may be stereoregular and tend toward higher crystallinity than randomly sequenced polymers. A polymer of 3-methyl-1,4-dioxane-2,5-dione has the same empirical formula as an equimolecular copolymer of lactic and glycolic acid but has unique physical properties resulting from its more regular steric configuration. Polymers and copolymers of 3- and 3,6-unsymmetrically substituted 1,4-dioxane-2,5-diones have surgically useful mechanical properties. On implantation, in living mammalian tissue, the polymers are absorbed, and replaced by living tissue.

REFERENCES:
patent: 3268487 (1966-08-01), Klootwijk
patent: 3440225 (1969-04-01), Sattler et al.
patent: 3442871 (1969-05-01), Schmitt et al.
patent: 3636956 (1972-01-01), Schneider
patent: 3839297 (1974-10-01), Wasserman et al.

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