Patents Assigned to Albright & Wilson Limited
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Patent number: 6200586Abstract: A suspension comprising an aqueous structured surfactant having suspended therein particles or droplets of a substantially water insoluble or sparingly soluble biocidal or agrochemical active substance in a weight ratio of total surfactant to said active substance of less than 20:1.Type: GrantFiled: May 2, 1997Date of Patent: March 13, 2001Assignee: Albright & Wilson LimitedInventors: Alan James Lambie, Brian John Akred, William John Nicholson, Jill Elizabeth Newton
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Patent number: 5964692Abstract: Aqueous structured surfactants, e.g., lamellar, or preferably spherulitic systems optionally containing suspended solids are used as functional fluids, such as drilling fluids, cutting fluids, hydraulic fluids, heat transfer fluids, construction muds and lubricants. A composition consisting essentially of: water; a surfactant or mixture of surfactants present in a concentration sufficient to form a mobile spherulitic or dispersed lamellar phase in the absence of an electrolyte; and a substantially water insoluble functional material, suspended in the composition, the composition being substantially free from electrolyte.Type: GrantFiled: June 6, 1995Date of Patent: October 12, 1999Assignee: Albright & Wilson LimitedInventors: Michael Blezard, Michael John Williams, Boyd William Grover, William John Nicholson, Edward Tunstall Messenger, John Hawkins
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Patent number: 5952285Abstract: A liquid detergent composition containing water; surfactant in a concentration which would in the absence of electrolyte form a pourable hexagonal, or cubic phase at 20.degree. C.; and sufficient dissolved electrolyte to form a substantially Newtonian or optically isotropic liquid.Type: GrantFiled: May 30, 1997Date of Patent: September 14, 1999Assignee: Albright & Wilson LimitedInventor: John Hawkins
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Patent number: 5807810Abstract: Aqueous structured surfactants, e.g., lamellar, or preferably spherulitic systems optionally containing suspended solids are used as functional fluids, such as drilling fluids, cutting fluids, hydraulic fluids, heat transfer fluids, construction muds and lubricants. A composition consisting essentially of: water; a surfactant or mixture of surfactants present in a concentration sufficient to form a mobile spherulitic or dispersed lamellar phase in the absence of an electrolyte; and a substantially water insoluble functional material, suspended in the composition, the composition being substantially free from electrolyte.Type: GrantFiled: June 1, 1995Date of Patent: September 15, 1998Assignee: Albright & Wilson LimitedInventors: Michael Blezard, Michael John Williams, Boyd William Grover, William John Nicholson, Edward Tunstall Messenger
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Patent number: 5741757Abstract: The biocidal activity of THP (tetrakis hydroxymethyl phosphonium) compounds is synergistically enhanced by using them in conjunction with wetting agents.Type: GrantFiled: March 17, 1995Date of Patent: April 21, 1998Assignee: Albright & Wilson LimitedInventors: Kenneth G. Cooper, Robert E. Talbot, Malcolm J. Turvey
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Patent number: 5710332Abstract: A method for the manufacture of N,N dialkylglycamine compounds of general formula R.sub.2 NR.sub.1 R.sub.3 (I) by reacting a secondary amine of general formula R.sub.2 NHR.sub.3 (II) in which R.sub.2 is a straight or branched chain alkyl or hydroxyalkyl group having from 1 to 4 carbon atoms and R.sub.3 is a residue from a monosaccharide, with an alkali metal or alkaline earth metal aliphatic sulphate, R.sub.1 SO.sub.4 M, in which R.sub.1 is a straight or branched chain alkyl or alkenyl group having from 8 to 24 carbon atoms.The betaine, suphobetaine and N-oxidised derivatives of (I) are provided for use as mild surfactants.Type: GrantFiled: July 12, 1996Date of Patent: January 20, 1998Assignee: Albright & Wilson LimitedInventors: Brynley Morris Phillips, Ajit Kumar, Alan Smithson
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Patent number: 5659035Abstract: A method for the production of azacycloalkane-2,2-diphosphonic acids of general formula; ##STR1## where n is a whole number of from 2 to 16, Y is H, an alkyl or alkenyl, a substituted alkyl, or an aryl, such that the group "Y" remains unchanged during the reaction,by reaction of a lactam with a phosphorus trihalide in the presence of phosphorous acid and/or water, in which the reaction mixture also includes an organic amine and/or or an organic amine salt, said reaction being followed by hydrolysis of the reaction mixture and purification of the reaction product to obtain the diphosphonic acid.The method is exemplified by the preparation of azacycloheptane-2,2-diphosphonic acid, and azacyclononane-2,2-diphosphonic acid.Type: GrantFiled: December 8, 1994Date of Patent: August 19, 1997Assignee: Albright & Wilson LimitedInventors: Michael Bamber, Gary Woodward
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Patent number: 5656074Abstract: Anticorrosive compositions for use in paints comprise (i) zinc oxide with (ii) the reaction product of an acidic trivalent metal compound and a silicate or (iii) an aluminium/silicate material eg a clay.Type: GrantFiled: April 17, 1995Date of Patent: August 12, 1997Assignee: Albright & Wilson LimitedInventors: John Richard Collier, Kenneth Urmston Holker
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Patent number: 5618385Abstract: Chlorine dioxide is used to stabilize hydrogen peroxide in bleach liquor at alkaline pH. This is thought to be aided by the destruction of enzymes (especially catalase) produced by bacteria. The method is useful for the reprocessing of pulps, especially when a de-inking stage is involved.Type: GrantFiled: October 28, 1994Date of Patent: April 8, 1997Assignee: Albright & Wilson LimitedInventors: Trevor E. Jones, Stephen Crelling, Robert E. Talbot
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Patent number: 5606105Abstract: Unsaturated compounds which can be dissolved in aqueous based solvents, such as ethylenic or acetylenic carboxylate or alcohols with less than 10 carbon atoms, especially maleic and/or acrylic acid or propargyl alcohol, are reacted with alkali metal phosphite in aqueous solution at neutral or alkaline pH in the presence of free radical initiators such as persulphate to form threshold scale and corrosion inhibitors.Type: GrantFiled: August 18, 1994Date of Patent: February 25, 1997Assignee: Albright & Wilson LimitedInventors: Keith P. Davis, Peter A. T. Hoye, Michael J. Williams, Gary Woodward, Martin P. Greenhall
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Patent number: 5523478Abstract: A method for the manufacture of N,N dialkylglycamine compounds of general formula R.sub.2 NR.sub.1 R.sub.3 (I) by reacting a secondary amine of general formula R.sub.2 NHR.sub.3 (II) in which R.sub.2 is a straight or branched chain alkyl or hydroxyalkyl group having from 1 to 4 carbon atoms and R.sub.3 is a residue from a monosaccharide, with an alkali metal or alkaline earth metal aliphatic sulphate, R.sub.1 SO.sub.4 M, in which R.sub.1 is a straight or branched chain alkyl or alkenyl group having from 8 to 24 carbon atoms.The betaine, suphobetaine and N-oxidised derivatives of (I) are provided for use as mild surfactants.Type: GrantFiled: November 16, 1994Date of Patent: June 4, 1996Assignee: Albright & Wilson LimitedInventors: Brynley M. Phillips, Ajit Kumar, Alan Smithson
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Patent number: 5498791Abstract: A synergistic mixture of a carbonate and/or bicarbonate with a phosphonate, especially an organoamino methylene phosphonate or an N-oxide thereof, inhibits or reduces nitrosamine contamination during preparation, storage and/or heating of products which are susceptible to contamination with nitrosamine.Type: GrantFiled: January 20, 1995Date of Patent: March 12, 1996Assignee: Albright & Wilson, LimitedInventors: Michael Blezard, Glyn R. Jones, Moharam Ghadimi
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Patent number: 5495064Abstract: A method for the immobilization of heavy metal contaminant from a liquid medium containing sulfuric acid and one or more acids of phosphorus, for example in the treatment of acid raffinates generated during the purification of phosphoric acid. The method includes the steps of (i) neutralizing the liquid medium with a stoichiometric excess of an alkaline earth metal oxide to form agglomerates, and (ii) treating the agglomerates with water to form a solid cementitious material wherein the heavy metal contaminants are substantially chemically isolated.Type: GrantFiled: May 4, 1994Date of Patent: February 27, 1996Assignee: Albright & Wilson LimitedInventors: Michael L. James, Mark A. Rose
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Patent number: 5476519Abstract: Water insoluble or sparingly soluble dyestuffs such as disperse dyes as concentrates for making up dyebaths or for use as printing pastes, and optical brightening agents for laundry detergents are formulated as stable suspensions in aqueous structured surfactants.Type: GrantFiled: March 8, 1995Date of Patent: December 19, 1995Assignee: Albright & Wilson, LimitedInventors: William P. Haslop, Jill E. Newton, Richard M. Clapperton
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Patent number: 5442113Abstract: A synergistic mixture of a carbonate and/or bicarbonate with a phosphonate, especially an organoamino methylene phosphonate or an N-oxide thereof, inhibits or reduces nitrosamine contamination during preparation, storage and/or heating of products which are susceptible to contamination with nitrosamine.Type: GrantFiled: February 1, 1993Date of Patent: August 15, 1995Assignee: Albright & Wilson LimitedInventors: Michael Blezard, Glyn R. Jones, Moharam Ghadimi
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Patent number: 5439999Abstract: Copolymers of aryl phosphonic acids can be made in a bulk polymerization process with unsaturated monomeric hydrocarbons. Preferred are alpha-phenyl vinyl phosphonic acid and styrene. Bulk polymerization process avoids suspending agents, emulsifying agents or water. Absence of halogen avoids environmental problems. A free radical initiator is required.Type: GrantFiled: February 22, 1994Date of Patent: August 8, 1995Assignee: Albright & Wilson LimitedInventors: Adrian Archer, Mohsen Zakikhani
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Patent number: 5385896Abstract: Phosphonium salts such as THP and aldehydes such as formaldehyde exhibit synergistic biocidal activity.Type: GrantFiled: May 9, 1994Date of Patent: January 31, 1995Assignee: Albright & Wilson LimitedInventors: Edward Bryan, Malcolm A. Veale, Robert E. Talbot, Kenneth G. Cooper, Nigel S. Matthews
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Patent number: 5386038Abstract: Unsaturated compounds which can be dissolved in aqueous based solvents, such as ethylenic or acetylenic carboxylate or alcohols with less than 10 carbon atoms, especially maleic and/or acrylic acid or propargyl alcohol, are reacted with alkali metal phosphite in aqueous solution at neutral or alkaline pH in the presence of free radical initiators such as persulphate to form threshold scale and corrosion inhibitors.Type: GrantFiled: September 17, 1992Date of Patent: January 31, 1995Assignee: Albright & Wilson LimitedInventors: Keith P. Davis, Peter A. T. Hoye, Michael J. Williams, Gary Woodward, Martin P. Greenhall
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Patent number: 5378243Abstract: In a method for the flame-retardant treatment of fabrics by impregnation with a condensate of a tetrakis (hydroxyorgano) phosphonium salt and, e.g., urea, the addition of one or more protonated and neutralized amines to the impregnation solution increases the efficiency of fixation of the phosphonium salt within the fibers, improves its uniform distribution within the system and leads to improved flame-retardant and water-resistant properties.Type: GrantFiled: October 13, 1993Date of Patent: January 3, 1995Assignee: Albright & Wilson LimitedInventors: Xiao P. Lei, David W. Speake, Mohsen Zakikhani
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Patent number: 5376142Abstract: A method for treating animal skins, prior to tanning including contacting animal skins with an aqueous degreasing solution containing brine and an effective amount of a shrink inhibitor, the shrink inhibitor being(a) at least one hydroxyalkyl phosphine compound of the formula(HORPR.sub.n.sup.1 O.sub.m).sub.x X.sub.ywhereinR is a C.sub.1 -C.sub.24 alkyl or a C.sub.1 -C.sub.24 alkylene;R.sup.1 is a C.sub.1 -C.sub.26 alkyl, a C.sub.1 -C.sub.24 alkenyl or ROH;X is an anion, whereby the hydroxyalkyl phosphine compound is at least sparingly soluble in water;x is a whole number equal to the valency of X;n=2 or 3 and m=0 or 1, whereby (n+m)=2 or 3;y=0 or 1, whereby (n+y)=2 or 4; or(b) a condensate of at least one of the compound (a), the condensate being at least sparingly water-soluble.Type: GrantFiled: May 21, 1993Date of Patent: December 27, 1994Assignee: Albright & Wilson LimitedInventors: Nigel S. Matthews, Graham R. Lloyd