摘要:
A method for modifying the physical characteristics of cellulose materials by the impregnation of the cellulose fibers with acidic solutions of monomer and oligomeric silicic acid to form a capillary cellulose-polysilicic acid structure to which selective binder materials may be adhered.
摘要:
Dialkylaminosulfur trifluorides such as diethylaminosulfur trifluoride are useful in replacing hydroxyl group and carbonyl oxygen with fluorine in various organic compounds.
摘要:
SOLUBLE ORGANOPHOSPHORUS DERIVATIVES OF CELLULOSE NITRATE PREPARED BY REACTION OF CELLULOSE NITRATE CONTAINING FREE HYDROXYL GROUPS WITH A MONO-FUNCTIONAL ORGANOPHOSPHORYL OR PHOSPHINYL CHLORIDE. THE MODIFIED POLYMERS HAVE MARKEDLY IMPROVED FIRE RESISTANCE, RETAIN SUBSTANTIALLY THE ORIGINAL NITROGEN CONTENT, ARE SOLUBLE IN MOST LACQUER SOLVENTS AND ARE CAPABLE OF FORMING DURABLE FILM AS DECORATIVE AND FUNCTIONAL COATINGS.
摘要:
THIS INVENTION RELATES TO A METHOD FOR PREPARING CARBOHYDRATE-BORON ALKOXIDE COMPOUNDS. UNDER ANHYDROUS CONDITIONS, STABLE COMPOUNDS OF METHYL CELLULOSE AND BORON ALKOXIDES, SUCH AS BORON ETHOXIDE, BORON PROPOXIDE, AND BORON ISOPROPOXIDE, WERE PREPARED IN NEAT BORON ALKOXIDE, THE PARENT ALCOHOL, BENZENE, PYRIDINE, AND/OR ETHYLENEDIAMINE. THE METHOD OF THIX INVENTION HAS AS ITS OBJECTIVE INCREASING THE REACTIVITY OF METHYL CELLULOSE WITH BORON ALKOXIDES BY TREATMENT IN SOLUTIONS OF STRONG BASES, SUCH AS PYRIDINE AND ETHYLENEDIAMINE. FORMATION OF METHYL CELLULOSE-BORON ALKOXIDE COMPOUNDS MODIFIES THE RATE OF OXIDATION OF METHYL CELLULOSE AND IS RELATED TO PREPARING FLAME-RESISTANT PRODUCTS.
摘要:
CELLULOSE CARBONATE IS PREPARED BY REACTING CELLULOSE OR A 6-SUBSTITUTED CELLULOSE, E.G. METHYL CELLULOSE, HYDROXYETHYL CELLULOSE, CARBOMETHYL CELLULOSE AND DIETHYLAMINOETHYL WITH AN ALKYL OR ARYL CHLOROFORMATE.
摘要:
A METHOD FOR PHOSPHORYLATING CELLULOSIC MATERIAL SUCH AS CELLULOSE AND CELLULOSE DERIVATIVES PARTICULARLY THE ESTERS AND ETHERS BY REACTING THE CELLULOSIC MATERIAL WITH A SOLUTION OF PHOSPHORIS PENTOXIDE IN DIMETHYLFORMAMIDE. PHOSPHORYLATED CELLULOSE DERIVATIVES CONTAINING ABOUT 4 TO ABOUT 10% BY WT. BOUND PHOSPHORUS HAVE BEEN PREPARED.