Patents by Inventor Edmund P. Woo
Edmund P. Woo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5929194Abstract: The invention relates to poly(tertiary di- or polyarylamines) which have more than one aryl moiety which is further substituted with a moiety capable of chain extension or crosslinking. In another aspect, the invention relates to poly(tertiary di- or polyarylamines) which have more than one aryl moiety which is further substituted with a moiety capable of chain extension or crosslinking which are partially or completely crosslinked or chain extended. The invention further relates to films prepared from such chain extended or crosslinked poly(tertiary di- or polyarylamines). The invention further relates to electrophotographic devices and electroluminescent devices, such as polymeric light-emitting diodes, containing such films.Type: GrantFiled: October 27, 1997Date of Patent: July 27, 1999Assignee: The Dow Chemical CompanyInventors: Edmund P. Woo, Michael Inbasekaran, William R. Shiang, Gordon R. Roof
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Patent number: 5777070Abstract: A process for preparing conjugated polymers which comprises contacting (i) monomers having two reactive groups selected from boronic acid, C.sub.1 -C.sub.6 boronic acid ester, C.sub.1 -C.sub.6 borane, and combinations thereof, with aromatic dihalide-functional monomers or (ii) monomers having one reactive boronic acid, boronic acid ester, or borane group and one reactive halide-functional group, with each other; (wherein the monomers are selected so that the polymerization reaction product of such has conjugated unsaturated internal groups) in a reaction mixture which contains: (a) an organic solvent in which the polymer forms at least a 1 percent solution; (b) an aqueous solution of an inorganic base having a pKa in the range of from 9 to 13, said solution having a concentration of at least 0.1N; (c) a catalytic amount of a palladium complex; and (d) at least 0.Type: GrantFiled: October 23, 1997Date of Patent: July 7, 1998Assignee: The Dow Chemical CompanyInventors: Michael Inbasekaran, Weishi Wu, Edmund P. Woo
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Patent number: 5728801Abstract: A poly(arylamine) composition comprising one or more compounds of Formula (I): ##STR1## wherein: R is independently in each occurrence a C.sub.1-24 hydrocarbyl, C.sub.1-24 hydrocarboxy, C.sub.1-24 hydrocarbylthiooxy, or C.sub.1-24 hydrocarbylcarboxyl;Ar.sup.1 and Ar.sup.2 are independently in each occurrence a C.sub.6-18 aryl moiety optionally substituted with a C.sub.1-12 hydrocarbyl, C.sub.1-12 hydrocarbyloxy, C.sub.1-12 hydrocarbylthiooxy, or C.sub.1-12 hydrocarbylcarboxyl;A is independently in each occurrence hydrogen or a halogen;x is independently in each occurrence a positive number from 0 to 1;n is independently in each occurrence a whole number of from 0 to 4; andm is a number of from about 5 to about 1000.Type: GrantFiled: August 13, 1996Date of Patent: March 17, 1998Assignee: The Dow Chemical CompanyInventors: Weishi Wu, Edmund P. Woo, William R. Shiang
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Patent number: 5708130Abstract: The invention relates to 2,7-substituted-9-substituted fluorenes and 9-substituted fluorene oligomers and polymers. The fluorenes, oligomers and polymers are substituted at the 9-position with two hydrocarbyl moieties which may optionally contain one or more of sulfur, nitrogen, oxygen, phosphorous or silicon heteroatoms; a C.sub.5-20 ring structure formed with the 9-carbon on the fluorene ring or a C.sub.4-20 ring structure formed with the 9-carbon containing one or more heteroatoms of sulfur, nitrogen or oxygen; or a hydrocarbylidene moiety. In one embodiment, the fluorenes are substituted at the 2- and 7-positions with aryl moieties which may further be substituted with moieties which are capable of crosslinking or chain extension or a trialkylsiloxy moiety. The fluorene polymers and oligomers may be substituted at the 2- and 7'-positions. The monomer units of the fluorene oligomers and polymers are bound to one another at the 2- and 7'-positions.Type: GrantFiled: July 28, 1995Date of Patent: January 13, 1998Assignee: The Dow Chemical CompanyInventors: Edmund P. Woo, William R. Shiang, Michael Inbasekaran, Gordon R. Roof
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Patent number: 5534614Abstract: A polyamide precursor of a polybenzazole polymer is prepared by reacting an aromatic bis(alkenyl)ester with a ring forming, aromatic diamine. The precursor can be prepared in an organic solvent for the monomers to form a soluble polyamide precursor which can be subsequently cyclocondensed to form a PBX polymer. A polybenzoxazole precursor is prepared by the reaction of a bis(alkenyl)ester and a bis(ortho-hydroxyamine). A polybenzazole polymer is easily prepared by heating the polyamide, PBX precursor.Type: GrantFiled: March 28, 1994Date of Patent: July 9, 1996Assignee: The Dow Chemical CompanyInventors: James J. O'Briem, Edmund P. Woo
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Patent number: 5322916Abstract: A polyamide precursor of a polybenzazole polymer is prepared by reacting an aromatic bis(alkenyl)ester with a ring forming, aromatic diamine. The precursor can be prepared in an organic solvent for the monomers to form a soluble polyamide precursor which can be subsequently cyclocondensed to form a PBX polymer. A polybenzoxazole precursor is prepared by the reaction of a bis(alkenyl)ester and a bis(ortho-hydroxyamine). A polybenzazole polymer is easily prepared by heating the polyamide, PBX precursor.Type: GrantFiled: March 16, 1993Date of Patent: June 21, 1994Assignee: The Dow Chemical CompanyInventors: James J. O'Brien, Edmund P. Woo
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Patent number: 5284921Abstract: Block copolymers comprising activated aromatic ether or thioether repeat units having utility as molding resins are prepared by contacting polymers comprising different activated aromatic ether or thioether repeat units in the presence of an exchange catalyst.Type: GrantFiled: November 2, 1992Date of Patent: February 8, 1994Assignee: The Dow Chemical CompanyInventors: Michael J. Mullins, Edmund P. Woo
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Patent number: 5264538Abstract: Cyclic poly(aryl ether) oligomers and mixtures thereof, and methods for the preparation thereof in a highly dilute reaction medium under reaction conditions favorable for ring closure at low degrees of polymerization. These oligomers are represented by the general formula ##STR1## where each Y is divalent oxygen or divalent sulfur, each Ar is an aromatic diradical which comprises one or more C.sub.6 to C.sub.20 arylene groups and has at least one electron withdrawing group attached to an aromatic ring, and n is an integer from 1 to about 20 with the proviso that for integer values of n equal to 1 or 2 all linkages between independent aromatic rings comprise at least one atom.Type: GrantFiled: June 27, 1990Date of Patent: November 23, 1993Assignee: The Dow Chemical CompanyInventors: Michael J. Mullins, Edmund P. Woo, Kimberly E. Balon, Daniel J. Murray, Cheng-Cheng C. Chen
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Patent number: 5264520Abstract: This invention is a process for the preparation of poly(aryl ethers) from cyclic poly(aryl ether) oligomers. These low melt viscosity cyclic oligomers undergo ring opening and chain extension upon heating in the presence of a catalyst, forming high molecular weight linear polymers with no coproduct formation. Finished thermoplastic parts and composites may be prepared using this technology with processing techniques normally restricted to thermosetting monomers.Type: GrantFiled: July 3, 1990Date of Patent: November 23, 1993Assignee: The Dow Chemical CompanyInventors: Michael J. Mullins, Edmund P. Woo
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Patent number: 5077350Abstract: Poly(aryl ether/thioether)-poly(aryl carbonate) block copolymers are prepared by reacting a poly(aryl carbonate) with a poly(aryl ether/thioether) having at least one electron-withdrawing group located in a position ortho or para to its ether/thioether linking group, in the presence of an exchange catalyst. At least a portion of the poly(aryl ether/thioether) blocks are joined to the poly(aryl carbonate) blocks through an ether/thioether oxygen or sulfur atom.Type: GrantFiled: April 16, 1990Date of Patent: December 31, 1991Assignee: The Dow Chemical CompanyInventors: Michael J. Mullins, Edmund P. Woo
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Patent number: 4994533Abstract: A method for preparing novel poly(aryl ether)-(poly aryl carbonate) block copolymers by the decarboxylation of copolycarbonates prepared by the condensation of two different aromatic dihydroxy compounds and a carbonate precursor such as phosgene. At least one of the aromatic diols must have at least one electron-withdrawing group located in a position ortho or para to at least one of its hydroxy groups and at least one of the diols must not have any electron-withdrawing groups in a position ortho or para to either of its hydroxy groups. The method is particularly effective in making crystalline block copolymers.Type: GrantFiled: March 28, 1989Date of Patent: February 19, 1991Assignee: The Dow Chemical CompanyInventors: Michael J. Mullins, Steven P. Crain, Edmund P. Woo, Daniel J. Murray, Stephen E. Bales
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Patent number: 4973728Abstract: Aromatic carbonates useful for the preparation of high molecular weight polycarbonate resins are prepared by reacting methanol, carbon monoxide and oxygen to prepare dimethyl carbonate; reacting a methyl silyl ether with a phenol or bisphenol to prepare an aryl silyl ether, and reacting the dimethyl carbonate and aryl silyl ether to prepare an aromatic carbonate.Type: GrantFiled: August 12, 1987Date of Patent: November 27, 1990Assignee: The Dow Chemical CompanyInventors: Hendrik E. Tuinstra, Cynthia L. Rand, Edmund P. Woo
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Patent number: 4943640Abstract: The invention is a process for the preparation of a 5-(1-alkylcarbonyloxy)alkylpyrrolidin-2-one which comprises contacting a N-alkylcarbonyl-5-alkylcarbonylpyrrolidin-2-one with hydrogen in the presence of a catalytic amount of a hydrogenation catalyst under conditions such that a 5-(1-alkylcarbonyloxy)alkylpyrrolidin-2-one is prepared.Type: GrantFiled: March 18, 1988Date of Patent: July 24, 1990Assignee: The Dow Chemical CompanyInventors: Edmund P. Woo, Michael J. Mullins
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Patent number: 4912232Abstract: The invention is a process for the preparation of a N-hydrocarbylcarbonyl-5-(1-hydrocarbylcarbonyloxy)hydrocarbylpyrrolidin-2- one which comprises contacting in an inert nonpolar organic solvent a hydrocarbyloxycarbonylpyrrolidin-2-one with(a) an agent which forms a nitrogen-metal or nitrogen-metalloid bond;(b) a reducing agent;(c) an alkylating agent; and(d) an acylating agent;under conditions such that a N-hydrocarbylcarbonyl-5-(1-hydrocarbylcarbonyloxy)hydrocarbylpyrrolidin-2- one is prepared.Type: GrantFiled: August 4, 1987Date of Patent: March 27, 1990Assignee: Dow Chemical CompanyInventors: Michael J. Mullins, Edmund P. Woo
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Patent number: 4880884Abstract: A method for preparing novel poly(aryl ether)-(poly aryl carbonate) block copolymers by the decarboxylation of copolycarbonates prepared by the condensation of two different aromatic dihydroxy compounds and a carbonate precursor such as phosgene. At least one of the aromatic diols must have at least one electron-withdrawing group located in a position ortho or para to at least one of its hydroxy groups and at least one of the diols must not have any electron-withdrawing groups in a position ortho or para to either of its hydroxy groups. The method is particularly effective in making crystalline block copolymers.Type: GrantFiled: April 27, 1988Date of Patent: November 14, 1989Assignee: The Dow Chemical CompanyInventors: Michael J. Mullins, Steven P. Crain, Edmund P. Woo, Daniel J. Murray
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Patent number: 4774316Abstract: The polyfunctional vinylbenzyl ethers of polyhydric halogenated phenolic compounds are prepared and can be copolymerized with polycyanate ester compounds to provide copolymers having dielectric constants below 3 and a V-O rating in a UL-94 test.Type: GrantFiled: August 15, 1986Date of Patent: September 27, 1988Assignee: The Dow Chemical CompanyInventors: James P. Godschalx, Edmund P. Woo, Patricia A. Schrader, Peter D. Aldrich
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Patent number: 4751323Abstract: This invention relates to a polyaromatic cyanate which corresponds to the formula ##STR1## wherein Ar is an aromatic radical;B is a C.sub.7-20 polycyclic aliphatic radical;D is independently in each occurrence any non-active hydrogen-containing substituent;q, r and s are independently in each occurrence the integers b 0, 1, 2, l or b 3l ; with the proviso that the sum of q, 4 and s is greater than or equal to 2;t is independently in each occurrence an integer of between about 0 and 4 inclusive; andx is a number between about 0 and 5 inclusive.Another aspect of this invention is a novel polytriazine which comprises the reaction product of the polyaromatic cyanate esters of this invention. The novel polytriazines may further comprise the reaction product of the novel polyaromatic cyanates of this invention in admixture with other cyanates known in the art as useful for the preparation of polytriazines.Type: GrantFiled: November 16, 1983Date of Patent: June 14, 1988Assignee: The Dow Chemical CompanyInventors: Edmund P. Woo, Daniel J. Murray
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Patent number: 4748270Abstract: A process for the preparation of an aromatic cyanate which comprises (a) preparing in situ a cyanogen chloride by contacting a solution of chlorine in a chlorinated hydrocarbon with an aqueous solution of an alkali metal cyanide at a temperature of 0.degree. C. or below under conditions such that a cyanogen chloride is prepared; (b) physically separating the chlorinated hydrocarbon in which the cyanogen chloride is dissolved from the aqueous layer in which an alkali metal chloride salt is dissolved; and (c) contacting the cyanogen chloride dissolved in the chlorinated hydrocarbon with a hydroxy-substituted aromatic compound dissolved in a chlorinated hydrocarbon, a secondary alcohol or a tertiary alcohol, in the presence of a tertiary amine at a temperature of about 0.degree. C. or less under conditions such that a polyaromatic cyanate is prepared.Type: GrantFiled: November 16, 1983Date of Patent: May 31, 1988Assignee: The Dow Chemical CompanyInventors: Daniel J. Murray, Edmund P. Woo
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Patent number: 4713442Abstract: This invention relates to a polyaromatic cyanate which corresponds to the formula ##STR1## wherein: Ar is an aromatic radical;B is a C.sub.7-20 polycyclic aliphatic radical;D is independently in each occurrence any nonactive hydrogen-containing substituent;q, r and s are independently in each occurrence the integers 0, 1, 2, or 3; with the proviso that the sum of q, 4 and s is greater than or equal to 2;t is independently in each occurrence an integer of between about 0 and 4 inclusive; andx is a number between about 0 and 5 inclusive.Another aspect of this invention is a novel polytriazine which comprises the reaction product of the polyaromatic cyanate esters of this invention. The novel polytriazines may further comprise the reaction product of the novel polyaromatic cyanates of this invention in admixture with other cyanates known in the art as useful for the preparation of polytriazines.Type: GrantFiled: February 27, 1986Date of Patent: December 15, 1987Assignee: The Dow Chemical CompanyInventors: Edmund P. Woo, Daniel J. Murray
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Patent number: 4675443Abstract: New epoxy resins are prepared by reacting a hydroxybenzamide or derivative thereof with an epihalohydrin followed by dehydrohalogenation. These epoxy resins have crystalline melting points, self-cure at elevated temperatures and cure rapidly in the presence of the usual epoxy resin curing agents. Also disclosed are hydrolyzed products of these epoxy resins and subsequent reactions with polyisocyanates.Type: GrantFiled: May 13, 1982Date of Patent: June 23, 1987Assignee: The Dow Chemical CompanyInventors: James L. Bertram, Edmund P. Woo