Patents Represented by Attorney, Agent or Law Firm B. G. Colley
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Patent number: 4407995Abstract: Polycarbonates are heat stabilized by the incorporation of a carbonate compound having a boiling point greater than about 250.degree. C. and an organophosphorous compound such as a phosphonite or a phosphite. The amount of the additive compound used in each instance is from 100 to 10,000 parts per million.Type: GrantFiled: July 28, 1982Date of Patent: October 4, 1983Assignee: The Dow Chemical CompanyInventor: Kevin F. Dick
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Patent number: 4389512Abstract: Cycloalphatic acrylate compositions and methods of making them are disclosed. The compositions are mixtures containing dicyclopentadiene (meth) acrylate and (meth) acrylates such as the mono and di (meth) acrylates of tri, and tetracyclopentadiene and a mixture of the copolymers of (meth) acrylic acid with adducts of cyclopentadiene with isoprene and/or piperylene and a mixture of poly (meth) acrylates having the repeating unit ##STR1## where R.sup.1 is hydrogen or ##STR2## R.sup.2 is CH.sub.2 .dbd.CZ--C(O)--O-- Z is H, or methyln is 0, 1 or 2 andm is 0 or 1 and when m is 0 there isa double bond present.The compositions are useful to make crosslinkable blends with unsaturated resins or monomers and to make laminates.Type: GrantFiled: May 29, 1981Date of Patent: June 21, 1983Assignee: The Dow Chemical Co.Inventors: Hans R. Friedli, Donald L. Nelson, John L. Massingill, Jr.
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Patent number: 4387182Abstract: Cycloalphatic acrylate compositions and methods of making them are disclosed. The compositions are mixtures containing dicyclopentadiene (meth) acrylate and (meth) acrylates such as the mono and di (meth) acrylates of tri, and tetracyclopentadiene and a mixture of the copolymers of (meth) acrylic acid with adducts of cyclopentadiene with isoprene and/or piperylene and a mixture of poly (meth) acrylates having the repeating unit ##STR1## where R.sup.1 is hydrogen or ##STR2## R.sup.2 is CH.sub.2 .dbd.CZ--C(O)--O-- Z is H, or methyln is 0, 1 or 2 andm is 0 or 1 and when m is 0 there is a double bond present.The compositions are useful to make cross-linkable blends with unsaturated resins or monomers and to make laminates.Type: GrantFiled: May 29, 1981Date of Patent: June 7, 1983Assignee: The Dow Chemical Co.Inventors: Hans R. Friedli, Donald L. Nelson, John L. Massingill, Jr.
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Patent number: 4380684Abstract: A method for preparing C.sub.4 to C.sub.10 .alpha.-olefins employing trialkyl aluminum compounds, in a growth zone having a recirculation rate through an external heat transfer zone such that the contents of the zone are recirculated in a period of time sufficient to remove the heat of the reaction using added lower .alpha.-olefins at 100.degree.-150.degree. C., 200-2000 psig, and 5-90 minute contact time followed by displacement with lower .alpha.-olefins in a static mixer zone to free the growth .alpha.-olefins and regenerate the trialkyl aluminum compounds. The growth .alpha.-olefins are separated with all of the lower .alpha.-olefins recycled to the growth and displacement steps.Type: GrantFiled: April 19, 1982Date of Patent: April 19, 1983Assignee: The Dow Chemical CompanyInventors: Allan E. Fowler, Gordon E. White, Steve A. Sims
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Patent number: 4378454Abstract: Polycarbonates are prepared in homogeneous solutions from dihydric phenols and phosgene wherein the stoichiometric end point for the addition of phosgene is accurately controlled by using 4-(p-nitrobenzyl) pyridine as a colorometric indicator for the end point in a series of samples of the reaction solution.Type: GrantFiled: November 4, 1981Date of Patent: March 29, 1983Assignee: The Dow Chemical CompanyInventors: Kevin F. Dick, George E. Ham, James R. Gross
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Patent number: 4377707Abstract: Halogenated dicyclopentyl ethers or thioethers of alkylene glycol mono(meth) acrylate or mono (meth) propionates are prepared. The dihalo compounds having (meth) acrylic functionality are useful to prepare thermosetting or thermoplastic resins with built in fire retardency. The tetrahalo compounds are useful fire retardant additives in the manufacture of polymeric foams.Type: GrantFiled: December 17, 1981Date of Patent: March 22, 1983Assignee: The Dow Chemical CompanyInventors: Clinton J. Boriack, Hans R. Friedli
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Patent number: 4367154Abstract: Glycol concentrates containing alkali metal silicates are rendered gellation resistant by the addition of phosphonates having one of the formulas,(I) (RO).sub.3-m (R').sub.m Si--R.sup.2 --O--P(O) (OR.sup.3)(R.sup.4),(II) [(RO).sub.3-m (R').sub.m Si--R.sup.2 --O--.sub.2 P(O)(R4)or(III) mixtures of I and II,wherein m is 0-2R, R.sup.3, R.sup.4 are alkyl groups of 1-4 carbons,R' is an alkyl group of 1-4 carbons, phenyl, and aralkyl group of 7-10 carbons, andR.sup.2 is an alkylene group of 1-4 carbons.Type: GrantFiled: July 29, 1981Date of Patent: January 4, 1983Assignee: The Dow Chemical CompanyInventor: Robert T. Jernigan
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Patent number: 4362848Abstract: Cycloalphatic acrylate compositions and methods of making them are disclosed. The compositions are mixtures containing dicyclopentadiene (meth) acrylate and (meth) acrylates such as the mono and di (meth) acrylates of tri, and tetracyclopentadiene and a mixture of the copolymers of (meth) acrylic acid with adducts of cyclopentadiene with isoprene and/or piperylene and a mixture of poly (meth) acrylates having the repeating unit ##STR1## Where R.sup.1 is hydrogen or ##STR2## R.sup.2 is CH.sub.2 .dbd.CZ--C(O)--O-- Z is H, or methyln is 0, 1 or 2 andm is 0 or 1 and when m is 0 there isa double bond present.The compositions are useful to make cross-linkable blends with unsaturated resins or monomers and to make laminates.Type: GrantFiled: May 29, 1981Date of Patent: December 7, 1982Assignee: The Dow Chemical Co.Inventors: Hans R. Friedli, Donald L. Nelson, John L. Massingill, Jr.
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Patent number: 4360634Abstract: Polyester resins are prepared by reacting unsaturated dicarboxylic acid anhydrides with water, a diene oligomer, and a polyol or and an alkylene oxide. The polyester resins can be blended with unsaturated monomers and various fiber to give cured laminates. The advantage of this invention is that the substitution of the diene oligomers gives lower cost resins with about the same properties.Type: GrantFiled: September 8, 1981Date of Patent: November 23, 1982Assignee: The Dow Chemical CompanyInventor: Donald L. Nelson
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Patent number: 4351812Abstract: The hydrolysis of carbon oxysulfide in a gas or liquid stream is catalyzed by morpholines and piperazines at a temperature in the range from about 50.degree. about 90.degree. C. The process can be used in the treatment of refinery gases, coal gasification streams, and other such gases as well as liquid hydrocarbons which contain COS and other acidic contaminants.Type: GrantFiled: August 4, 1980Date of Patent: September 28, 1982Assignee: The Dow Chemical CompanyInventors: Glenn D. Correll, Hans R. Friedli
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Patent number: 4348499Abstract: Polyester resins are produced from unsaturated dicarboxylic anhydrides which are modified with a C.sub.10 hydrocarbon concentrate. They are superior to the known resins made by the hydrolysis method containing the hydrocarbon concentrate in that the dicarboxylic anhydrides used in the preparation of the resins are hydrolyzed with an amount of water always less than the amount of maleic anhydride and/or hydrocarbon on a molar basis. After the hydrocarbon addition reaction of the in situ generated acid, the reaction is heated to 140.degree. C. to 185.degree. C. in order to generate cyclopentadiene or similar C.sub.5 hydrocarbons and form endomethylene tetrahydrophthalic anhydride (carbic anhydride) or other similar Diels-Alder products from the remaining unreacted maleic anhydride and hydrocarbon, generally prior to the addition of other resin forming chemical intermediates e.g. polyols.Type: GrantFiled: August 28, 1980Date of Patent: September 7, 1982Assignee: The Dow Chemical CompanyInventor: Donald L. Nelson
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Patent number: 4345048Abstract: Brominated cycloaliphatic (meth) acrylate compositions are prepared by the reaction of bromine at a temperature in the range from -30.degree. C. to 50.degree. C. with compositions made by reacting (meth) acrylic acid with dicyclopentadiene compositions in the presence of a Friedel-Crafts catalyst such as BF.sub.3.The brominated compositions are useful to make copolymers which find use as metal coatings, laminates, ultraviolet light curable coatings and the like.Type: GrantFiled: January 21, 1980Date of Patent: August 17, 1982Assignee: The Dow Chemical CompanyInventors: Hans R. Friedli, Clinton J. Boriack
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Patent number: 4336349Abstract: Chlorinated cycloaliphatic (meth) acrylate compositions are prepared by the reaction of chlorine at a temperature in the range from -30.degree. C. to 50.degree. C. with compositions made by reacting (meth) acrylic acid with crude dicyclopentadiene in the presence of a Friedel-Crafts catalyst such as BF.sub.3. The chlorinated compositions have a pleasant fruity odor and are useful to make homopolymers or copolymers which find use as metal coatings, inks, ultraviolet light curable coatings and the like.Type: GrantFiled: December 22, 1980Date of Patent: June 22, 1982Assignee: The Dow Chemical CompanyInventors: Hans R. Friedli, Clinton J. Boriack
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Patent number: 4333843Abstract: Gellation resistant aqueous glycol compositions useful as antifreeze compositions are disclosed containing silicates together with other corrosion inhibitors. The silicates are added to the glycol compositions after the other additives have been added and after the composition has been adjusted to a pH range of 7-12. The gellation resistance is obtained or enhanced by the addition of an effective amount of the hydrolyzate of organo-phosphorous-silicon compounds having the formula(RO).sub.3 Si(CH.sub.2).sub.n --O-P(O)(CH.sub.3)--ORwherein R is an alkyl group of 1-4 carbon atoms, and n is an integer of 1-4,A method of improving the gellation resistance of aqueous glycol compositions is also disclosed which comprises adding an effective amount of the above hydrolyzate to the corrosion resistant glycol compositions before or during the silicate addition.Type: GrantFiled: October 20, 1980Date of Patent: June 8, 1982Assignee: The Dow Chemical CompanyInventors: Phillip L. Wing, George A. Sweeney
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Patent number: 4324676Abstract: Aqueous glycol compositions containing conventional corrosion inhibitors are improved by the addition of a .beta.-dicarbonyl compounds having the formulaR.sub.1 -C(O)-C(R.sub.2)(R.sub.3)-C(O)-R.sup.4whereR.sub.1 and R.sub.4 are independently alkyl groups of 1-4 carbons, and alkoxy groups, of 1-4 carbons,R.sub.2 and R.sub.3 are hydrogen, hydroxyl, alkyl groups of 1-4 carbons, or acetyl groups, with the proviso that R.sub.1 and R.sub.2 can be joined to form a 5 or 6 membered ring when R.sub.3 is hydrogen and R.sub.4 is an alkyl group of 1-4 carbons,with the proviso that R.sub.1 and R.sub.4 can be joined to form a 5 membered ring when R.sub.2 is hydrogen and R.sub.3 is an alkyl group of 1-4 carbons, with the proviso that R.sub.1 and R.sub.4 can be joined to form the 1,2-phenylene group when R.sub.2 and R.sub.3 are hydrogen, andwith the proviso that R.sub.1 and R.sub.4 can be joined to form the 1,2 phenylene group when R.sub.2 is hydroxyl and R.sub.3 is the 2-hydroxy 1,3-dione-indanyl-2 group.Type: GrantFiled: January 21, 1980Date of Patent: April 13, 1982Assignee: The Dow Chemical CompanyInventor: Herman S. Gilbert
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Patent number: 4319009Abstract: Cycloalphatic acrylate compositions and methods of making them are disclosed. The compositions are mixtures containing dicyclopentadiene (meth) acrylate and (meth) acrylates such as the mono and di (meth) acrylates of tri, and tetracyclopentadiene and a mixture of the copolymers of (meth) acrylic acid with adducts of cyclopentadiene with isoprene and/or piperylene and a mixture of poly (meth) acrylates having the repeating unit ##STR1## where R.sup.1 is hydrogen or ##STR2## R.sup.2 is CH.sub.2 .dbd.CZ-C(O)--O-- Z is H, or methyln is 0, 1 or 2 andm is 0 or 1 and when m is 0 there isa double bond present.The compositions are useful to make crosslinkable blends with unsaturated resins or monomers and to make laminates.Type: GrantFiled: October 13, 1978Date of Patent: March 9, 1982Assignee: The Dow Chemical CompanyInventors: Hans R. Friedli, Donald L. Nelson, John L. Massingill, Jr.
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Patent number: 4314090Abstract: A method for preparing C.sub.4 to C.sub.10 .alpha.-olefins having a major portion C.sub.6 .alpha.-olefins employing tri alkyl aluminum compounds, e.g., Al(C.sub.2 H.sub.5).sub.3 or Al(C.sub.4 H.sub.9).sub.3 or mixtures of Al(C.sub.2 H.sub.5).sub.3 and Al(C.sub.4 H.sub.9).sub.3 as well as the unmixed C.sub.2, C.sub.4 alkyl aluminum isomers or homologs in the growth step using added ethylene at about 120.degree. C., 500-700 psig, 5-90 minute contact time followed by displacement with C.sub.2 H.sub.4, C.sub.4 H.sub.8, or C.sub.2 H.sub.4 and C.sub.4 H.sub.8 to free the growth alkyl and regenerate the tri alkyl aluminum compounds. The growth .alpha.-olefins are separated with all of the C.sub.2 H.sub.4 recycled to the growth and displacement steps, and part or all of the C.sub.4 H.sub.8 recycled to the displacement step.Type: GrantFiled: August 18, 1980Date of Patent: February 2, 1982Assignee: The Dow Chemical CompanyInventors: William E. Shewbart, Steve A. Sims, Billy D. Head, G. Eldon White
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Patent number: 4310593Abstract: Water absorbent articles, made from solutions of carboxylic polyelectrolytes, together with methods for their preparation, and a composition useful to make said articles are disclosed. The articles are cured and/or crosslinked with monomeric amine-epihalohydrin adducts by heating and/or removing substantially all of the solvent from the precursor composition.The absorbent articles are useful as surgical sponges, diapers, tampons, meat trays, bath mats and the like.Type: GrantFiled: December 22, 1980Date of Patent: January 12, 1982Assignee: The Dow Chemical CompanyInventor: James R. Gross
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Patent number: 4293609Abstract: Flexible absorbent laminates made from crushed films of lightly crosslinked or water-swellable hydrophilic polymers with layers of wicking substrates are disclosed. The crushed laminates are made by drying the laminates to less than 8% moisture and crushing them preferably between a yieldable roller and an enbossed roller. The crushed laminates have a tissue-like feel at low relative humidities with rapid absorption and are useful to make baby diapers or adult diapers.Type: GrantFiled: June 30, 1980Date of Patent: October 6, 1981Assignee: The Dow Chemical CompanyInventor: Robert E. Erickson
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Patent number: 4289738Abstract: Sour industrial gases containing carbon dioxide and hydrogen sulfide are treated with amines to remove the CO.sub.2 and H.sub.2 S. The amine absorbent containing or loaded with H.sub.2 S and CO.sub.2 is regenerated and the off-gas containing concentrated amounts of H.sub.2 S and CO.sub.2 is treated in a second amine absorber to produce an amine absorbent loaded with H.sub.2 S. This amine is then regenerated to provide an off-gas containing a high ratio of H.sub.2 S to CO.sub.2 which makes it suitable for use as the feed gas to a sulfur recovery unit such as a Claus plant. The process is automatically controlled so that the concentration of H.sub.2 S in the second amine absorber is built up to and controlled at a desired set point so that the off-gas has the required H.sub.2 S/CO.sub.2 ratio.Type: GrantFiled: July 22, 1980Date of Patent: September 15, 1981Assignee: The Dow Chemical CompanyInventors: Roscoe L. Pearce, Charles W. Martin