Keratin-based products and methods for their productions

Details Keratin-based products and methods for their productions Keratin-based products and methods for their productions

2007-01-30

2007-01-30

Carlson, Karen Cochrane (Department: 1653)

Chemistry: natural resins or derivatives; peptides or proteins;

Proteins, i.e., more than 100 amino acid residues

C512S014000

Reexamination Certificate

active

10483566

ABSTRACT:
The present invention relates to a process for solubilizing keratins from a keratin containing starting material such as poultry feathers. The keratins are may be solubilized using a sulphide under alkaline conditions. In the process the cysteine residues of solubilized keratins and are partially modified, e.g. by alkylation. The conditions of solubilisation and partial modification are chosen such that the keratins are also partially hydrolyzed. The partially modified and partially hydrolyzed keratin may be used as stable dispersions e.g. for the production of films and coatings by casting.

REFERENCES:
patent: 4279996 (1981-07-01), Yoshioka et al.
P.M.M. Schrooyen, P.J. Dijkstra, R.C. Oberthur, A.Bantjes, J.Feijen: “Partially Carboxylated Feather Keratins. 2. Thermal and Mechanical Properties of Films” J, Agric. Food Chem., vol. 2001, No. 49, Dec. 16, 2000, pp. 221-230, XP002187325.
P.M.M. Schrooyen, P.J. Dijkstra, R.C. Oberthur, A.Bantjes, J.Feijen: “Partially Carboxymethylated Feather Keratins. 1. Properties in Aqueous Systems”J. Agric. Food Chem., vol. 2000, No. 48, Aug. 16, 2000, pp. 4326-4334, XP002187326 cited in the application.

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