Ppg Industries, Inc.

Richard P Beaver

Ronald E Betts

Robert G Swisher

Herbert W Barch

Joseph J Hammel

Louis J Nehmsmann

Robert G Briody

Michael A Smoot

William P Marshall

Jonathan E Hostler

George V Sanzero

Walter J Robertson

Lin-Chang Chiang

Balbhadra Daas

A polymeric reaction product is disclosed that is a silylated polyamine-containing polymer having moieties from fatty acid moieties and/or chain extenders as difunctional organo moieties and free amine moieties and hydrolyzed and/or hydrolyzable organofunctional silane moieties and that is at least water dispersible. The reactants that produce this product are a polyamine-containing polymer with fatty acid moieties and free amine moieties and at least one amine-reactable organo functional alkoxysilane or its hydrolysis products. The former reactant results from the reaction of a polyamine-containing polymer with free amine moieties with fatty acids alone or in mixtures with other fatty acids and/or dimer acids. The polymeric reaction product is combined with a predominant amount of water to form a fiber treating formulation that can reside on the surface of one or more treated fibers.

Silylated polyamine polymers and a method of treating fibers

Porous glass shapes with effective pores are produced by a method which also reduces the frequency of breakage of the glass shapes. The method includes: producing a plurality of the glass shapes, depositing a fluid chemical treatment with one or more carbonaceous materials on a substantial portion of the surfaces of the glass shapes, heat treating the glass shapes to phase separate components of the glass, leaching the phase separated glass shapes to remove leachable components to produce pores in the glass shapes, and removing any residual carbonaceous material. The various forms of glass shapes include particles, platelets, flakes, beads, fibers both solid and hollow, tubes and capillaries, which are essentially free of carbonaceous material.

Method of producing effective porous glass shapes

A hollow, porous, silica-rich fiber, a process for producing same, and a process for enriching at least one gas from a gaseous mixture utilizing at least one fiber to result in gas separations with good permeability and good selectivity. The fiber is non-crystalline and has pore sizes having a range of 1 to around 50 Angstroms in diameter and a mean pore size of around less than 20 Angstroms in diameter and a filament diameter in the range of 1 to around 250 microns and a wall thickness in the range of around 1 to 50 microns. The fibers with a fine pore structure and thin walls are produced by forming hollow glass fibers hindered or fully phase-separable boron and/or alkali metal glass composition, by attenuation from melt at speeds in the range of 500 ft/min to around 30,000 ft/min. The phase-separable glass fibers are heat treated to yield limited phase-separated hollow glass fibers and these fibers are leached to extract acid and/or water soluble components. For fully phase-separable, hollow glass fibers, a limited heat treatment is used before leaching, where the heat treatment is at a temperature of around 300 to less than 480.degree. C. for a time of around 5 minutes to 24 hours. The hindered, phase-separable, hollow glass fibers are heat treated at a temperature in the range of about 400 to about 600.degree. C. At least one hollow, porous, silica-rich fiber is used in a device suitable to contain a gaseous mixture and the permeate is withdrawn from the silica-rich fiber at the opposite side from that at which the gaseous mixture contacts the hollow, porous fiber.

Process of gas enrichment with porous siliceous-containing material

Porous, hollow, silica-rich fibers with good alkaline tolerance are produced from hollow glass fibers of an alkali metal borosilicate glass having one or more oxides of a metal of Group IV of the Periodic Table in an amount of about 1 to about 20 weight percent of the glass composition. The hollow porous silica-rich fibers are produced by acid leaching where the hollow glass fibers have greater than 25 weight percent extractable components, less than 25 weight percent extractable components but a wall thickness of less than 15 microns, or less than 25 weight percent extractable components and a fiber diameter of less than 25 microns. In addition, heat treating can be used for hollow glass fibers having greater than 25 weight percent extractable components to enlarge the pores.

Method of producing porous hollow silica-rich fibers

Biochemically active material is immobilized on porous silica-rich glass fibers having a diameter of about 3 to 150 microns, a length of about 0.03 inch to continuous fiber length, a mean pore diameter in the range of about 10 to 3000 angstroms, a pore volume of about 0.5 to 1.5 cc/gm and a surface area of about 10 to 600 m.sup.2 /gm. The porous glass fibers are preferably formed from a composition containing greater than 35 up to 60 weight percent B.sub.2 O.sub.3, about 1 to 10 weight percent alkali metal oxides, about 30 to 65 weight percent SiO.sub.2, up to about 5 weight percent ZrO.sub.2, and up to about 4 weight percent Al.sub.2 O.sub.3. Fibers having the composition are heated to cause phase separation into a boron-rich phase and a silica-rich phase, and are then treated by water and acid leaching to produce the porous glass fibers. A biochemically active material is attached to the fibers by absorption or by covalent bonding with a linking agent.

Porous glass fibers with immobilized biochemically active material

A packed tube of generally parallel aligned fibers is described, wherein the fibers are packed therein at densities of 60 to 100 percent of the theoretical packing density based on the fiber diameters used based on the selected fiber pitch pattern and preferably at 70 to 100 percent of the theoretical. Glass fibers which can be porous and/or hollow are preferred.

Method of preparation of packed fiber glass reaction vessel

Packed fiber glass reaction vessel

A method of cleaning glass volatile contaminants from the surfaces of heat transfer fins in a fin cooler of a glass fiber forming bushing assembly is disclosed. A cleaning liquid which is a dilute alcohol solution in which the alcohol is selected from the group consisting of primary and second alcohols is sprayed in a generally flat, fan shapes spray against the side and top surfaces of the cooling fins. This spray of a dilute alcohol solution removes the contaminants from the fin surfaces while not adversely affecting the glass fiber filaments being formed during running of the bushing assembly. A solution of between 0.1 to 1.0% methanol or ethylene glycol in water has been found to be particularly satisfactory in removing boron oxide contaminants from the fin surfaces.

Method of cleaning heat transfer fins

A self purging fin cooler for use with a glass fiber forming bushing assembly is disclosed. A fin cooler header block is provided with a flow channel for coolant flow and a separate flow channel for cleaning liquid flow. A plurality of cleaning liquid distribution passages extend from the cleaning liquid flow channel to spray nozzles positioned between adjacent cooling fins that extend outwardly from the header block. Each spray nozzle produces a flat, fan shaped spray of cleaning liquid which removes contaminants that accumulate on the tops and sides of the cooling fins. A flow control valve assembly and frequency and duration timers are utilized to provide a controllable cleaning liquid spray frequency and duration. During non-spray periods a low volume of cleaning liquid to the spray nozzles insures that the nozzles will not become clogged.

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Library, PA, United States of America

Richard P Beaver