Abstract: In a method of removing alkylene halogenohydrin from a cellulose ether the cellulose ether is provided, water is added to the cellulose ether and subsequently alkylene halogenohydrin and water is removed from the cellulose ether by evaporation. Alternatively steam or a steam mixture can be sparged across or through the cellulose ether to remove halogenohydrin from the cellulose ether.

Abstract: The present disclosure is directed to methods for producing a very low viscosity cellulose ether having little or no discoloration and cellulose ether products resulting therefrom. The method includes contacting a cellulose ether with an oxidizing agent and an acid to form a mixture. The mixture is then heated and neutralized. The method includes adding a second oxidizing agent to the mixture and forming a very low viscosity cellulose ether having a viscosity from 1.2 cP to less than 2 cP. The very low viscosity ether may also have an APHA color value of 1 to 100.

Abstract: The present disclosure is directed to methods for producing a very low viscosity cellulose ether having little or no discoloration and cellulose ether products resulting therefrom. The method includes contacting a cellulose ether with an oxidizing agent and an acid to form a mixture. The mixture is then heated and neutralized. The method includes adding a second oxidizing agent to the mixture and forming a very low viscosity cellulose ether having a viscosity from 1.2 cP to less than 2 cP. The very low viscosity ether may also have an APHA color value of 1 to 100.

Abstract: In a method of removing alkylene halogenohydrin from a cellulose ether the cellulose ether is provided, water is added to the cellulose ether and subsequently alkylene halogenohydrin and water is removed from the cellulose ether by evaporation. Alternatively steam or a steam mixture can be sparged across or through the cellulose ether to remove halogenohydrin from the cellulose ether.

Abstract: A process for reducing the average molecular weight of a cellulose ether comprises the step of contacting a cellulose ether with an acid to partially depolymerize it to a lower molecular weight in a diluent comprising at least 50 weight percent of an organic hydroxylic compound having at least one hydroxy group and at least two carbon atoms.

Abstract: The present invention relates to a particulate water-soluble polymeric polyol that is treated with a compound represented by formula (I), CR1?(OR2)4-x (I) wherein R1 is selected from hydrogen, a C1-C20 alkyl group and an aryl group, R2 is independently at each occurrence selected from a C1-C20 alkyl group and an aryl group, and x is selected from the integer 0 and 1; or with a combination of said compounds, to a method for treating a particulate water-soluble polymeric polyol with the above compound and to a method for the preparation of an aqueous solution of the treated particulate water-soluble polymeric polyol.

Abstract: The present disclosure is directed to methods for producing a very low viscosity cellulose ether having little or no discoloration and cellulose ether products resulting therefrom. The method includes contacting a cellulose ether with an oxidizing agent and an acid to form a mixture. The mixture is then heated and neutralized. The method includes adding a second oxidizing agent to the mixture and forming a very low viscosity cellulose ether having a viscosity from 1.2 cP to less than 2 cP. The very low viscosity ether may also have an APHA color value of 1 to 100.

Abstract: A process for reducing the average molecular weight of a cellulose ether comprises the step of contacting a cellulose ether with an acid to partially depolymerize it to a lower molecular weight in a diluent comprising at least 50 weight percent of an organic hydroxylic compound having at least one hydroxy group and at least two carbon atoms.

Abstract: Process for the production of polysaccharide ethers, e.g. cellulose ethers, are disclosed wherein salts formed during the process, e.g., sodium nitrate or sodium acetate, are converted to their corresponding acids and bases by means of an electric current, preferably in combination with a bipolar membrane and suitable catiion and/or anion membranes. The acids and bases recovered from the process can be recycled, thereby avoiding the need to provide for disposal of salts.

Abstract: Processes for the production of polysaccharide ethers, e.g. cellulose ethers, are disclosed wherein salts formed during the process, e.g., sodium nitrate or sodium acetate, are converted to their corresponding acids and bases by means of an electric current, preferably in combination with a bipolar membrane and suitable cation and/or anion membranes. The acids and bases recovered from the processes can be recycled, thereby avoiding the need to provide for disposal of the salts.

Abstract: This invention relates to coating compositions used for forming a magnetic layer on the surface of substrates to prepare magnetic recording media, e.g., recording tapes, of which the characteristic ingredient is a copolymeric resin. The copolymeric resin is a copolymer obtained by the copolymerization of comonomers in a specified proportion including (1) vinyl chloride, (2) vinyl acetate, and (3) an acrylate or methacrylate moiety having a sulfonic acid group or a metal or amine salt thereof. This copolymeric resin is advantageous in respect of imparting enhanced dispersion and magnetic property characteristics while also having desirable rheological characteristics and thermal stability.

Abstract: Novel phosphorylated compositions of a vinyl chloride copolymer or terpolymer, a phenoxy resin, a hydroxyalkyl acrylate or methacrylatelactone adduct or a reaction product of a normally solid pendant-hydroxyl-containing thermoplastic polymer having at least 8 hydroxyl groups per molecular chain and an adduct which is the product of either a hydroxylalkyl acrylate or methacrylate or a lactone-acrylate adduct and an organic diisocyanate having improved dispersion characteristics suitable for use in applications such as magnetic recording media.

Abstract: A mixed aliphatic/aromatic polycarbodiimide prepared by first polymerizing an aliphatic isocyanate or mixture thereof, optionally in the presence of a polyfunctional isocyanate; arresting polymer chain growth by reaction with a stoichiometrically deficient amount of a monofunctional isocyanate-reactive compound, followed by further polymerization with an aromatic diisocyanate.

Abstract: Novel vinyl chloride copolymers including a hydroxyalkyl acrylate or methacrylate or allyl alcohol, an epoxy-containing vinyl monomer and an acid functionality from either certain carboxylic acid-containing monomers or a phosphorus ester moiety in selected proportions provide suitable binder resins for applications such as magnetic recording media, imparting desirable thermal stability together with enhanced dispersion and magnetic property characteristics and miscibility with elastomers employed in such media.

Abstract: A coating composition comprising:(a) A graft copolymer, having surfactant properties, comprising the reaction product of (i) a vinyl copolymer comprising vinyl chloride, a vinyl carboxylate ester, and a source of hydroxyl groups, such that the hydroxyl content prior to reaction is about 0.5 to about 8% by weight of the vinyl copolymer and of which about 1 to about 75% of said hydroxyl groups have been reacted with (ii) an anhydride copolymer comprising the reaction product of an aromatic monomer and a dicarboxylic acid anhydride, such that the graft copolymer has a molecular weight of about 2,000 to about 30,000, and a vinyl copolymer/anhydride copolymer weight ratio of about 20 to about 2, of which a sufficient number of carboxyl groups have been hydrolyzed to produce surfactant properties;(b) a dispersible powder,(c) optionally, other hard resins,(d) optionally, a rubbery polymer,(e) optionally, a supplemental surfactant,all mixed in an organic solvent.

Abstract: Tetraalkyl orthosilicates may be prepared in good yield by contacting an alkanol having 1 to about 4 carbon atoms with copper-activated silicon synthesized by heating a mixture of cupric oxide and silicon particles at elevated temperatures at a temperature of about 120.degree.-250.degree. C. under autogeneous pressure.

Abstract: The solvent resistance, flexibility and hardness of various hydroxylated polymers is enhanced by crosslinking with alkyl silicates or their hydrolyzed condensates.

Abstract: Ethyl orthosilicate is produced by contacting silicon metal with a mixture of methanol and ethanol in the presence of a catalytic amount of an alkali metal carbonate or bicarbonate at a temperature of at least 130.degree. C. The methyl orthosilicates produced are converted to ethyl orthosilicate by transesterification with ethanol.

Abstract: Co-condensates of alkyl silicates and alkyl or aryl trialkoxy or dialkyl or aralkyl dialkoxy silanes filled with high temperature resistant pigments form films capable of withstanding temperatures as high as 600.degree. C.

Abstract: A process for the production of pressure sensitive adhesive latexes, wherein a surfactant is not employed during the polymerization, comprising the addition of a monomers mix to a free radical initiator capable of producing hydrophilic ionic end groups using a monomers mix that is capable of producing a polymer having a transition glass temperature of from -70.degree. C. to -20.degree. C.