PROCESS FOR MANUFACTURE OF PLASTIC MATERIAL FROM COLLAGEN Russian patent published in 1995 - IPC

FIELD: medicine, particularly, ophthalmology. SUBSTANCE: object of this invention is stepping up gas permeability and biological compatibility of material. For this purpose, claimed process prescribes carrying out depigmentation of collagen, introducing it into solution of silicic acid alkaline metals to obtain pH value of 4.5 to 6.0, standing thus prepared gel with stirring, isolating gel from liquid, washing it in deionized water to remove cations, saturating thus produced diafiltrated gel by water-soluble acrylate or vinyl monomers, exposing it to radiation at doses of 5 to 15 kG, and drying it. Further steps are mechanical treatment, immersing resultant stock into solution of chemically pure hydrofluoric acid, and then electrochemical purification of end product to remove anions and cations. EFFECT: higher gas permeability and biological compatibility of desired product.