Patents Assigned to Witco
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Patent number: 6013703Abstract: A stabilizer combination, principally for PVC, is described which essentially comprisesA) at least one zinc compound of the formula IZn(R.sup.1 R.sup.2) (I)andB) at least one metal compound of the formula IIMe.sup.n+ (R.sup.3.sub.a R.sup.4.sub.b R.sup.5.sub.c) (II)in which Me is Al, Mg, Na or K,a, b and c are 0, 1, 2 or 3,n=a+b+c and can be from 1 to 3, and at least one radical R.sup.1 to R.sup.5 independently of one another are C.sub.1 -C.sub.22 carboxylates, C.sub.2 -C.sub.21 alkenyl-CO.sub.2 --, phenyl-CO.sub.2 --, naphthyl-CO.sub.2 --, C.sub.5 -C.sub.12 cycloalkyl-CO.sub.2 --, C.sub.7 -C.sub.18 alkylphenyl-CO.sub.2 --, C.sub.7 -C.sub.18 alkylphenyl-O--, C.sub.7 -C.sub.9 phenylalkyl-CO.sub.2 --, C.sub.1 -C.sub.21 -alkyl-O--, R.sup.8 --O--CO--[CH.sub.2 ].sub.p --S-- or a radical of the formula R.sup.6 --CO--CH.dbd.CR.sup.7 --O.sup..crclbar.Type: GrantFiled: March 19, 1997Date of Patent: January 11, 2000Assignee: Witco Vinyl Additives GmbHInventors: Karl Josef Kuhn, Wolfgang Wehner, Horst Zinke
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Patent number: 6005027Abstract: The present invention discloses blends of silanes and specific silicas, characterized in that when the blend is compounded into a rubber formulation even after 4 months of storage following formation of the blend, an unexpectedly high proportion of the silane present is available as a coupling and reinforcing agent for the rubber formulation. Over 80% and even over 90% of the silica can be extracted or described from the blend even 4 months after formation of the blend, and rubber formulation properties indicate high availability of the silane for coupling and reinforcement.Type: GrantFiled: August 16, 1996Date of Patent: December 21, 1999Assignee: Witco CorporationInventors: Antoine Guillet, Remy Gauthier
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Patent number: 6001907Abstract: Sealant compositions comprising a latex polymer and an epoxysilane of the formula ##STR1## in which R.sup.1 is a difunctional alkyl bridge with 2 to 6 carbon atoms,each R.sup.2 group is the same or different and each is a C.sub.1 to C.sub.12 alkyl or aryl group, or a C.sub.1 to C.sub.6 alkoxy groupeach R.sup.3 group is the same or different and each is a C.sub.2 to C.sub.6 alkyl group,n is 2 or 1,R.sup.4, R.sup.5, and R.sup.6 are each hydrogen or a C.sub.1 to C.sub.6 alkyl group,R.sup.7 is an alkyl group having from one to four carbon atoms, or aralkyl, or an aryl group having six to ten carbon atoms, andc has a value of zero or one;wherein the epoxysilane is added to the polymer neat or as a non-aqueous solution.Type: GrantFiled: December 10, 1998Date of Patent: December 14, 1999Assignee: Witco CorporationInventor: Misty W. Huang
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Patent number: 6001946Abstract: Certain members of the class of N-silylalkyl-aspartic acid esters, when used to endcap polyurethane polymers, offer moisture curable, one-part sealant formulations having significantly improved physical property improvements over other members of the same class of organofunctional silanes. More specifically, polyurethane polymers terminated with either the dibutyl or diethyl maleate/primary aminoalkyl silane addition product offer sealants which substantially outperform comparative sealants obtained using polymers endcapped with other olefinic carboxylate ester (dimethyl maleate, dimethyl crotonate) or nitrile (acrylonitrile)/primary aminoalkyl silane addition products. Additionally, sealant formulations incorporating the dibutyl or diethyl maleate/primary aminoalkyl silane terminated polymers demonstrate unexpected improvements in both elongation and tensile strength performance. The dibutyl maleate and dimethyl maleate based polymers give significant increase in tear resistance.Type: GrantFiled: September 18, 1997Date of Patent: December 14, 1999Assignee: Witco CorporationInventors: Bruce A. Waldman, Shayne J. Landon, Herbert E. Petty
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Patent number: 6002004Abstract: The invention relates to compositions comprisinga) a chlorine-containing polymer andb) at least one compound containing at least one radical of the formula I ##STR1## in which A is the additional groups or atoms necessary to form an unsubstituted or substituted six-membered heterocyclic ring containing two nitrogen ring atoms.Type: GrantFiled: January 14, 1998Date of Patent: December 14, 1999Assignee: Witco Vinyl Additives GmbHInventors: Wolfgang Wehner, Hans-Helmut Friedrich, Rolf Drewes
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Patent number: 6001767Abstract: The invention disclosed involves the use of heteropoly acids as promoters to decompose organic peroxides.Type: GrantFiled: August 4, 1997Date of Patent: December 14, 1999Assignee: Witco CorporationInventors: Peter Frenkel, Ted M. Pettijohn
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Patent number: 6001140Abstract: The present invention relates to diesel fuel and lubrication oil defoaming agents, and crude oil demulsifiers, as well as methods for using same. In particular, the defoaming agents and demulsifiers are comprised of copolymers which have structures constituting a backbone of polysiloxane onto which is grafted an organic group. These structures comprise a polymer of the formula MD.sub.x D'.sub.y D".sub.z M, where M is O.sub.0.5 Si(CH.sub.3).sub.3, D is a OSi(CH.sub.3).sub.2, D' is OSi(CH.sub.3)R, D" is OSi(CH.sub.3)R', R is a polyhydric C.sub.6 -C.sub.28 organic group, R' is a phenol derivative or a long chain aliphatic group or polyethers, z is between 0 and 80, x+y+z is between 10-200, x/z is .gtoreq.1, and x/(y+z) is between about 1 and about 5, or formula M'D.sub.a M' where M' is O.sub.0.5 Si(CH.sub.3).sub.2 R, a is between 4-10, and R and D are the same as defined above.Type: GrantFiled: April 3, 1997Date of Patent: December 14, 1999Assignee: Witco CorporationInventors: Wojciech Grabowski, Rolf Haubrichs
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Patent number: 5998331Abstract: It has been discovered that organoamine modified siloxane alkoxylates overcome the antagonism associated with nonionic trisiloxane alkoxylates on pesticide uptake in plants. The organoamine modified siloxane alkoxylates of the present invention have the average general formula: AMe.sub.2 SiO[(Me).sub.2 SiO].sub.x [MeSi(Z)O].sub.y SiMe.sub.2 A, wherein x=0 to 1, y=0 to 2, with the proviso than when y=0, A is Z, A=is Z or Me, Z=RO(R.sup.1).sub.n R.sup.2 N(R.sup.3).sub.2, R is a divalent organic group having from 2 to 4 carbon atoms, R.sup.1 is an alkyleneoxide group containing 2 to 4 carbon atoms, R.sup.2 is a divalent organic group containing 2 to 6 carbons, R.sup.3 may be hydrogen, an alkyl radical with 1 to 4 carbons, an amino alkyl of one to four carbons, or an alkyl of 2 to 4 carbon atoms which may have hydroxy substitutions thereon. Each R.sup.3 may be the same or different.When R.sup.1 is oxyethylene, n is from 1 to 10, preferably 2 to 5. When R.sup.Type: GrantFiled: March 6, 1997Date of Patent: December 7, 1999Assignee: Witco CorporationInventor: George A. Policello
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Patent number: 5998540Abstract: Disclosed are aqueous polyurethane dispersions prepared from polyester polyols having 0.95 to 1.5 equivalents of carboxylic functionality thereon per equivalent of polyol, the dispersions also containing a nonionic surfactant component wherein the ratio by weight of said carboxylic functionality to said nonionic surfactant component is 1:2.5 to 1:0.5. The dispersions are particularly adapted to the formation of thin wall articles exhibiting greatly improved properties.Type: GrantFiled: October 22, 1998Date of Patent: December 7, 1999Assignee: Witco CorporationInventors: Anatoly Lipkin, Ibrahim Bechara
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Patent number: 5990181Abstract: Disclosed are antifoam emulsions useful in control of foam in aqueous foaming systems which comprise:(A) polydiorganosiloxane;(B) fine solid particles of inorganic oxide, bearing on the surface thereof a polydiorganosiloxane component; wherein the total amount of polydiorganosiloxane present in components (A) and (B) comprises 5 wt % to 60 wt % of the emulsion and the weight ratio of the total amount of polydiorganosiloxane present in components (A) and (B) to the amount of said inorganic oxide is 10:1 to 200:1;(C) an organic surfactant dispersing agent selected from the group consisting of non-ionic tetrafunctional block copolymers terminating in primary or secondary hydroxyl groups and mixtures thereof, which agent comprises 0.Type: GrantFiled: December 11, 1997Date of Patent: November 23, 1999Assignee: Witco CorporationInventors: Konstantinos Spyropoulos, Daniel Yves Sane
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Patent number: 5990257Abstract: Silylated polyurethanes exhibiting a superior combination of mechanical properties and which cure in reasonable time to a low-tack sealant, without excessive viscosity, are prepared by reacting a polyol component having terminal unsaturation of less than 0.2 meq/g with a diisocyanate component to form a hydroxyl-terminated prepolymer, and endcapping the prepolymer with an isocyanate silane of the formula OCN--R--Si--(X).sub.m (--OR.sup.1).sub.3-m wherein m is 0, 1 or 2, each R.sup.1 is alkyl containing 1 to 4 carbon atoms, each X is alkyl containing 1 to 4 carbon atoms, and R is a difunctional organic group.Type: GrantFiled: January 22, 1998Date of Patent: November 23, 1999Assignee: Witco CorporationInventors: Robert R. Johnston, Patrice Lehmann
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Patent number: 5986022Abstract: Disclosed is a continuous process for producing silicone copolymers using a series of at least one stirred-tank reactor, the last of which reactors in said series has crude product stream feeding into at least one plug flow reactor, wherein this crude product stream is sufficiently homogeneous that this stream which undergoes further reaction in the plug flow reactor does not undergo phase separation.Type: GrantFiled: April 1, 1998Date of Patent: November 16, 1999Assignee: Witco CorporationInventors: Paul E. Austin, James S. Ritscher, Robert A. Kayser, William E. Crane, David D. Farris
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Patent number: 5986122Abstract: This Invention discloses the use of ascorbic and citric acid, their salts, ethers, acid esters and mixtures thereof in a method for the prevention of peroxide formation, and/or for decomposing peroxides already formed in polyethers. Hereby, the polyethers are made reactive to hydrosilylation by silanes and hydrosiloxanes. When the polyether treatment is done with mixtures of ascorbic acid and sodium ascorbate and allyl polyethers, the hydrosilylation product contains reduced levels of propanal. The copolymers prepared using the treated polyethers are efficient stabilizers of flexible polyurethane foams and rigid polyurethane and polyisocyanurate foams.Type: GrantFiled: November 17, 1997Date of Patent: November 16, 1999Assignee: Witco CorporationInventors: Kenrick M. Lewis, Rudolph A. Cameron
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Patent number: 5985955Abstract: Disclosed are aqueous dispersions of polyurethane polymers from which films can be formed which have enhanced hydrophilicity. The enhanced hydrophilicity is provided by hydrophilic moieties chemically incorporated in the polymer network.Type: GrantFiled: May 2, 1997Date of Patent: November 16, 1999Assignee: Witco CorporationInventors: Ibrahim Bechara, Frank Bonney, Konstantinos Arvanitis
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Patent number: 5985964Abstract: High stabilization of PVC containing recycled material is achieved by using at least one lubricant and a stabilizer containing no lead or cadmium compounds.Type: GrantFiled: December 18, 1997Date of Patent: November 16, 1999Assignee: Witco Vinyl Additives GmbHInventors: Heinz Herbst, Kurt Hoffmann, Rudolf Pfaendner, Rolf Drewes
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Patent number: 5981681Abstract: The present invention discloses non-hydrolyzable, block, (AB).sub.n A type, copolymers comprising alternating units of polysiloxane and amino-polyalkyleneoxide and provides a method for the preparation of these copolymers. Also provided is the use of these copolymers as softeners, in particular durable, hydrophilic textile softeners, which improve tactile properties of the textiles substrates treated with the commercial soil release finishes, without substantially detracting from their properties. The copolymers of the present invention have alternating units of polysiloxane [X(C.sub.a H.sub.2a O).sub.b R.sup.2 [(SiO(R.sup.1).sub.2 ].sub.c Si(R.sup.1).sub.2 R.sup.2 (C.sub.a H.sub.2a O).sub.b X] and polyalkyleneoxides [YO(C.sub.a H.sub.2a O).sub.d Y] wherein R.sup.1 is a C.sub.1 to C.sub.4 alkyl, preferably methyl, R.sup.Type: GrantFiled: June 17, 1998Date of Patent: November 9, 1999Assignee: Witco CorporationInventor: Anna Czech
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Patent number: 5981674Abstract: A composition for crosslinking olefin polymers including an olefinically unsaturated alkoxysilane, a free radical generator, and an organic hindered amine light stabilizer compound, together with a process for crosslinking olefin polymers comprising blending said composition with an olefinic polymer, allowing the silane to graft to the polymer, and causing the grafted polymer to crosslink, preferably by subjecting it to moisture in the presence of a hydrolysis/condensation catalyst.Type: GrantFiled: December 18, 1996Date of Patent: November 9, 1999Assignee: Witco CorporationInventors: Jacques Schombourg, Willy Furrer
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Patent number: 5977189Abstract: Disclosed are stable monophasic liquid compositions comprising water, one or more cationic, anionic, amphoteric and/or nonionic surfactants, exhibiting partial solubility in water or in concentrated formulations, and one or more coupling agents which are C.sub.7 -C.sub.12 alkane substituted with two hydroxyl groups or alkoxylates thereof with up to 20 moles of one or more of ethylene oxide, propylene oxide and/or butylene oxide.Type: GrantFiled: July 25, 1997Date of Patent: November 2, 1999Assignee: Witco CorporationInventor: Robert O. Keys
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Patent number: 5969015Abstract: Compositions, comprising (i) a halogen-containing polymeric material, and(ii) at least one phosphite of formula I ##STR1## wherein n is a number from 1 to 6,R is a divalent linking group of formulae as defined herein as well as of novel compounds of formula I and their use as stabilisers.Type: GrantFiled: September 10, 1997Date of Patent: October 19, 1999Assignee: Witco Vinyl Additives GmbHInventors: Horst Zinke, Karl Josef Kuhn, Wolfgang Wehner
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Patent number: 5968872Abstract: The present invention teaches silicone polyether copolymers with a low degree of polymerization (3 to 4 Si units) provide control for foams generated by organosilicone based surfactants in water without the need for an additional antifoam component. The copolymer foam control agent is a compound of the formula(CH.sub.3).sub.3 SiO[SiO(CH.sub.3).sub.2 ].sub.X [SiOCH.sub.3 R.sup.1 ].sub.Y Si(CH.sub.3).sub.3wherein X+Y=1 to 2, Y.gtoreq.1, R.sup.1 is an alkyleneoxide group of the formula C.sub.a H.sub.2a O(C.sub.3 H.sub.6 O).sub.z R.sup.2 wherein a=3 to 4, z is 1 to 15, R.sup.2 is hydrogen, a hydrocarbon radical of 1 to 4 carbons or acetyl. This invention provides compositions for use in agricultural formulations that give improved foam control for foams generated from organosilicone surfactants in aqueous systems. The copolymer foam control agent is soluble in a surfactant matrix comprised of an organosilicone surfactant alone or in mixtures with short chain conventional surfactants.Type: GrantFiled: February 20, 1997Date of Patent: October 19, 1999Assignee: Witco CorporationInventors: George Policello, Gerald Murphy