Patents Represented by Attorney Walter J. Lee
-
Patent number: 5418271Abstract: Coating formulations which behave as elastic solids having reversible stress-induced fluidity are prepared by creating a fluid having distributed therein effective amounts of ionic charge sites and countercharge sites. For instance, elastic solids having reversible stress-induced fluidity are prepared by combining liquid formulations with a dispersion of a small, but effective, amount of at least one crystalline mixed metal hydroxide conforming substantially to the formulaLi.sub.m D.sub.d T(OH).sub.(m+2d+3+n.multidot.a) (A.sup.n).sub.a .multidot.xH.sub.2 Owhere m is zero to one, D is a divalent metal, d is from zero to 4, T is a trivalent metal, A represents at least one anion or negative-valence radical of valence n and a is the amount of A, where n is 1 or more, (m+2d+3+n.multidot.a) is equal to or greater than 3, (m+d) is greater than zero, and xH.sub.2 O represents excess waters of hydration, if any.Type: GrantFiled: October 11, 1991Date of Patent: May 23, 1995Assignee: The Dow Chemical CompanyInventors: John L. Burba, III, Peter A. Doty, Christopher P. Christenson, Susan K. Falcone, Andrea H. Hazlitt, Thomas M. Knobel, Wilfred C. Meyer, Arthur E. Read, Jr., Edgar F. Hoy, Avis L. McCrary, Ha Q. Pham, Stanley F. Simpson, Steve A. Sims, Betty J. Smith
-
Patent number: 4895457Abstract: Packaging containers which are closed, except for a pinch-type filling valve or filling-opening, are provided with an RF-sealable polymer, at least in the valve or opening, in order to be able to seal the valve or opening using RF frequency. Preferably, polymers which are sealable using MW energy are used, including, preferably, carbon monoxide-containing ethylene polymers.Type: GrantFiled: August 31, 1988Date of Patent: January 23, 1990Assignee: The Dow Chemical CompanyInventors: Gerald M. Lancaster, David C. Kelley
-
Patent number: 4880691Abstract: Fine denier fibers and/or multi-filaments prepared from linear low density polyethylene copolymers (LLDPE) are found to offer advantages over other forms of polyolefins.Type: GrantFiled: June 10, 1987Date of Patent: November 14, 1989Assignee: The Dow Chemical CompanyInventors: Lawrence H. Sawyer, George W. Knight
-
Patent number: 4842922Abstract: Blends of high molecular weight linear polyethylene and low molecular weight linear polyethylene provide improved fiber-forming capabilities over that found with either polymer taken alone. Preferably at least one of the polymers used in the blend is a linear low density polyethylene, LLDPE, which is a linear polyethylene comprising ethylene copolymerized with an amount of a higher alpha-olefin which causes the density of the copolymer to be less than that of a homopolymer made using the same process and catalyst. The higher alpha-olefin can be at least one in the C.sub.3 -C.sub.12 range, preferably in the C.sub.4 -C.sub.8 range.Type: GrantFiled: October 27, 1987Date of Patent: June 27, 1989Assignee: The Dow Chemical CompanyInventors: Stephen P. Krupp, Edward N. Knickerbocker, John O. Bieser
-
Patent number: 4839228Abstract: Extrudable blends of polypropylene and polyethylene, especially LLDPE, are prepared in a dynamic mixer and extruded as novel biconstituent fibers comprising polypropylene as one phase and polyethylene as another phase. Improved tenacity and hand are obtained, as compared to polypropylene alone.Type: GrantFiled: February 12, 1987Date of Patent: June 13, 1989Assignee: The Dow Chemical CompanyInventors: Zdravko Jezic, Gene P. Young
-
Patent number: 4835194Abstract: The film-forming composition comprises a mixture of a linear low density polyethylene and an antifogging agent. The antifogging agent comprises a compound of formula I. The composition is useful for preparing films with antifogging properties.Type: GrantFiled: July 22, 1987Date of Patent: May 30, 1989Assignee: The Dow Chemical CompanyInventors: Paul F. Bright, Harbert F. Leder
-
Patent number: 4830907Abstract: Fine denier fibers and/or multi-filaments prepared from linear low density polyethylene copolymers (LLDPE) are found to offer advantages over other forms of polyolefins.Type: GrantFiled: November 6, 1984Date of Patent: May 16, 1989Assignee: The Dow Chemical CompanyInventors: Lawrence H. Sawyer, George W. Knight
-
Patent number: 4812245Abstract: Useful compositions are prepared by incorporating into organic materials, crystalline lithium aluminates which conform substantially to the empirical formula(LiA.sub.x).sub.y.2Al(OH).sub.3.nH.sub.2 Owhere A represents one or more anions and/or negative-valence radicals,where x represents a quantity of A ions and/or radicals sufficient to substantially satisfy the valence requirements of the Li,where y is a numerical value sufficient to maintain the crystalline structure,and where n represents the number of waters of hydration, if any.Type: GrantFiled: April 14, 1986Date of Patent: March 14, 1989Assignee: The Dow Chemical CompanyInventors: John L. Burba, III, William C. Bauman
-
Patent number: 4795665Abstract: Containers for foods, juices and beverages containing essential oils or flavorings are comprised of a laminate structrue in which the inner surface of the container, in contact with the foods, juices or beverage, is a halopolymer, such as a vinylidene chloride polymer, which functions as a barrier layer to substantially restrict the passage or migration of the essential oils or flavorings.Type: GrantFiled: June 17, 1987Date of Patent: January 3, 1989Assignee: The Dow Chemical CompanyInventors: Gerald M. Lancaster, Morris S. Edmondson
-
Patent number: 4790954Abstract: Novel compositions useful as fluid gelling agents, especially for use in subterranean applications such as drilling fluids, are prepared by reacting an aqueous dispersion of a clay, such as bentonite, with an aqueous gel of a monodispersed mixed metal layered hydroxide of the formula Li.sub.m D.sub.d T(OH).sub.(m+2d+3+na) A.sub.a.sup.n, where D is a divalent metal, such as Mg, T is a trivalent metal, such as Al, and A represents other monovalent or polyvalent anions, the formula being described in detail in the disclosure.Type: GrantFiled: May 7, 1987Date of Patent: December 13, 1988Assignee: The Dow Chemical CompanyInventors: John L. Burba, III, Audrey L. Barnes
-
Patent number: 4787194Abstract: Packaging containers which are closed, except for a pinch-type filling valve or filling-opening, are provided with an RF-sealable polymer, at least in the valve or opening, in order to be able to seal the valve or opening using RF frequency. Preferably, polymers which are sealable using MW energy are used, including, preferably, carbon monoxide-containing ethylene polymers.Type: GrantFiled: April 27, 1987Date of Patent: November 29, 1988Assignee: The Dow Chemical CompanyInventors: Gerald M. Lancaster, David C. Kelley
-
Patent number: 4780265Abstract: Blends of a vinylidene chloride polymer, an olefin polymer, and a compatibilizer polymer are successfully fabricated into films using the well-known inflated bubble technique, by using blow-up rates in the range of about 1.5 to 5.0 and a drawn-down ratio upwards of 6, preferably upwards of 8, but not exceeding the critical draw-down ratio of 13. At a draw-down ratio exceeding 13, the physical properties of the polymer blend are seriously diminished.Type: GrantFiled: December 15, 1986Date of Patent: October 25, 1988Assignee: The Dow Chemical CompanyInventors: Nicole F. Whiteman, David P. Flores
-
Patent number: 4780264Abstract: The draw resonance problems encountered when extrusion casting or extrusion coating linear low density polyethylene, LLDPE, are substantially alleviated by a polymer designed to have an I.sub.2 value in the range of about 0.1 to about 25, and an I.sub.10 /I.sub.2 ratio of not more than 8.3, preferably lower than 8.3. Line speeds approaching and even surpassing those attained with LDPE are made possible. This invention can even be used in conjunction with known prior methods for alleviating draw resonance problems with LLDPE and obtain the benefits of the combination. The I.sub.2 is measured in accordance with ASTM D-1238-190/2.16 and the I.sub.10 is measured in accordance with ASTM D-1238-190/10.Type: GrantFiled: May 22, 1987Date of Patent: October 25, 1988Assignee: The Dow Chemical CompanyInventors: Kathryn K. Dohrer, Debra H. Niemann
-
Patent number: 4774290Abstract: Melt-reacted blends of ethylene/carboxylic acid copolymers with metal oxides are improved by first incorporating the metal oxide into an ethylene copolymer of LDPE, HDPE, or LLDPE to form a concentrate or masterbatch, then melt-blending a minor amount of the concentrate into the ethylene/carboxylic acid copolymer thereby obtaining a uniform, homogeneous reaction of the metal oxide with the carboxylic acid groups. These melt-reacted blends provide tough molding resins. Especially preferred are melt-reacted blends of EAA with minor amounts of MgO/LLDPE concentrates.Type: GrantFiled: May 7, 1987Date of Patent: September 27, 1988Assignee: The Dow Chemical CompanyInventors: Paul L. Neill, Gerald M. Lancaster, Kenneth L. Bryce
-
Patent number: 4769289Abstract: Free-flowing plural extrudates of a polar ethylene interpolymer, and method of preparing the same. The extrudates are essentially coated with about 0.001-2 percent, by weight of the composition, fumed silica, preferably about 0.025-0.05 weight percent. The fumed silica has an average primary particle size of about 5-25 millimicrons, a surface area of about 200-250 m.sup.2 /g, and is substantially amorphous and non-porous. The interpolymer has interpolymerized therein polar monomer, such as acrylic acid, n-butyl acrylate, vinyl acetate, or the like, in an amount so that the untreated extrudates have high block. The extrudates are treated by admixture with the silica or by contact with an aqueous dispersion of about 0.01-10 wt. % silica. When the interpolymer contains .alpha.,.beta.-ethylenically unsaturated carboxylic acid, the extrudates are optionally surface neutralized with a base.Type: GrantFiled: September 13, 1985Date of Patent: September 6, 1988Assignee: The Dow Chemical CompanyInventors: Laura A. Kelly, Kenneth L. Bryce
-
Patent number: 4766035Abstract: Articles useful as RF-sealable packaging materials comprise a halopolymer barrier layer coated onto, or adhered to, a carbon monoxide-containing polymer, wherein the carbon monoxide-containing polymer provides RF-sealability to the structure. Other layers of materials may be employed as part of the packaging material.Type: GrantFiled: December 17, 1986Date of Patent: August 23, 1988Assignee: The Dow Chemical CompanyInventors: Gerald M. Lancaster, Russell H. Cramm, David C. Kelley, Charles V. Neywick
-
Patent number: 4766036Abstract: Novel porous fibers and filaments are prepared from normally solid, thermoplastic, orientable, organic polymers which have reactive or reactable groups pendent from the polymer chain, employing a process which involves reactions of said pendent groups while the polymer is in an oriented condition. One of the preferred polymers is a copolymer of ethylene/acrylic acid.Type: GrantFiled: September 16, 1985Date of Patent: August 23, 1988Assignee: The Dow Chemical CompanyInventors: Walter L. Vaughn, Milton S. Wing
-
Patent number: 4765830Abstract: Injectable reagents useful for innoculating molten process metals, such as molten iron, are prepared by effecting an impregnation of a minor amount of a molten metal reagent, such as Mg or Al or alloys of these, into small particles of a major amount of an inorganic reagent, such as alkaline earth metal oxides and/or carbides, and freezing the molten metal reagent, thereby obtaining particles of the inorganic reagent permeated with metal reagent.Type: GrantFiled: July 22, 1987Date of Patent: August 23, 1988Assignee: The Dow Chemical CompanyInventors: Edward J. Skach, Jr., David W. Brake, Joseph H. Waibel
-
Patent number: 4762890Abstract: Maleic anhydride can be satisfactorily grafted to polymers at low pressures by feeding the polymer through a co-rotating, twin-screw extruder and injecting the maleic anhydride and a free radical initiator into the extruder. The maleic anhydride and initiator can be pre-mixed in a solvent solution. The solvent and unreacted maleic anhydride can be removed by low pressure devolatilization.Type: GrantFiled: September 5, 1986Date of Patent: August 9, 1988Assignee: The Dow Chemical CompanyInventors: Chad A. Strait, Gerald M. Lancaster, Ricky L. Tabor
-
Patent number: H544Abstract: Impressed current cathodic protection systems employing an anode having a cobalt spinel type surface, said surface having the formula: M.sub.x Z.sub.y Co.sub.(3-(x+y)) O.sub.4, where M is a metal or a mixture of two or more metals selected from the group of metals contained in Groups IB, IIA, and IIB of the periodic table of the elements, where Z is a metal or a mixture of two or more metals selected from the group of metals contained in Group IA of the periodic table of the elements, where 0.ltoreq.x.ltoreq.1, where 0.ltoreq.y.ltoreq.0.5, and where 0.ltoreq.(x+2y).ltoreq.1.Type: GrantFiled: April 13, 1987Date of Patent: November 1, 1988Assignee: The Dow Chemical CompanyInventors: Raul A. Castillo, Donald L. Caldwell, Ralph W. Parham, Jr.