Polymerization of cyclic amides using N-heterocyclic carbene...

Details Polymerization of cyclic amides using N-heterocyclic carbene... Polymerization of cyclic amides using N-heterocyclic carbene...

2005-11-09

2009-12-22

Seidleck, James (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

C528S315000, C528S323000, C528S326000

Reexamination Certificate

active

07635747

ABSTRACT:
Mixtures or adducts of N-heterocyclic carbenes with metal amides or metal alkoxides are effective catalysts for the polymerization of cyclic amides. The catalysts are stable at polymerization temperatures, and the polymerization is rapid, resulting in high monomer conversion, high molecular weight, and a mechanically sound material.

REFERENCES:
patent: 3780157 (1973-12-01), Hechlhammer et al
patent: 19 53 899 (1971-05-01), None
Baran et al Synthesis and ring-opening metathesis polymerization of eight-membered unsaturated lactams and related monomers, J. of Molecular catalyst, vol. 190, issues 1-2, pp. 109-116, Dec. 2, 2002.
K. Ueda et al., Polymer Journal (1996) 28(5), pp. 446-451.
W. Memeger, Jr., et al., Macromolecules (1996), 29, 6475-6480.
K. Udipi et al., Polymer (1997), 28(4), pp. 927-938.
J. Sebenda, Prog. Polym., Sci., 1978, 6, pp. 123-167.
G. W. Nyce, In situ generation of carbenes: a general and versatile platform for organocatalytic living polymerization, J. Am. Chem., Soc. vol. 125, No. 10, 2003, pp. 3046-3056.
A. Klapars, E.A., J. Am., Chem., Soc., vol. 126, No. 11, 2004, pp. 3529-2533.
S. Eldred, E.A., {“Catalytic Transmidation under Moderate Conditions”., J. Am. Chem., Soc., vol. 125, No. 12, 2003, pp. 3422-3423.
J. Cheng, E.A., “Controlled Polymerization of beta-lactams using metal-amido cmplexes: Synthesis of block copoly(beta-peptides)”, J. Am. Chem., Soc., vol. 123, No. 38, 2001, pp. 9457-9458.

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