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USE OF POLYMER ALLOYS BASED ON CELLULOSE ESTERS IN EYE CONTACT OPTICS AND CONTACT LENSES AND SHELLS MADE FROM THE POLYMER ALLOYS.
USE OF POLYMER ALLOYS BASED ON CELLULOSE ESTERS IN EYE CONTACT OPTICS AND CONTACT LENSES AND SHELLS MADE FROM THE POLYMER ALLOYS.
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机译:基于纤维素酯的高分子合金在由高分子合金制成的眼睛接触光学和接触透镜和外壳中的使用。
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摘要
Contact lenses prepared from a polymer alloy essentially free from low molecular weight plasticizers and which comprises (A) 97-80% by weight of one or more cellulose esters of one or more aliphatic carboxylic acids, and (B) 3-30% by weight of an aliphatic polymeric compound having ester moieties, carbonate moieties or both ester and carbonate moieties in the polymer chain and having an average molecular weight of 2,000 to 300,000, with less than 2% by weight of compounds having a molecular weight below 500.
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