Patents by Inventor Ibraheem T. Badejo
Ibraheem T. Badejo 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).
-
Patent number: 6420590Abstract: Continuous processes for forming cyanoacrylate from polycyanoacrylate include stripping a solvent from a reaction mass; cracking a polymer in the reaction mass to form a cracked cyanoacrylate monomer and residue substances; and distilling the cracked cyanoacrylate monomer to produce a cyanoacrylate monomer product. These steps can be performed in short-path, wiped-film evaporators. Polycyanoacrylate used in the processes can be formed using cyanoacetate produced by processes for continuously producing cyanoacetate by forming a higher homologue cyanoacetate from a lower homologue cyanoacetate. The cyanoacetate can be formed in short-path, wiped-film evaporators.Type: GrantFiled: October 31, 2000Date of Patent: July 16, 2002Assignee: Closure Medical CorporationInventors: Ibraheem T. Badejo, Jaime Ayarza, Kenneth W. Davis, Jeffrey R. Hennenkamp
-
Publication number: 20020078860Abstract: This invention relates to a process for preparing quinacridone pigment compositions byType: ApplicationFiled: December 22, 2000Publication date: June 27, 2002Inventors: Daphne J. Rice, Ibraheem T. Badejo
-
Publication number: 20020018689Abstract: An article of manufacture for dispensing a liquid adhesive includes an applicator body, a liquid adhesive contained within the applicator body, a porous applicator tip attached to the applicator body and in a non-contacting relationship with the liquid adhesive, and a polymerization initiator or rate modifier loaded in or on the applicator tip, wherein the polymerization initiator or rate modifier is selected from quaternary ammonium salts and tertiary amines. The liquid adhesive can also include a phase transfer catalyst.Type: ApplicationFiled: April 16, 2001Publication date: February 14, 2002Inventors: Ibraheem T. Badejo, Jeffrey G. Clark, William Cotter, William L. Heard, Daniel L. Hedgpeth, Roy F. Thompson
-
Patent number: 6245933Abstract: An &agr;-cyanoacrylate may be formed by first condensing a cyanoacetate with paraformaldehyde or formaldehyde; reacting the polymer formed with an alcohol to transesterify the polymer; and depolymerizing the polymer to form &agr;-cyanoacrylate monomers.Type: GrantFiled: November 19, 1999Date of Patent: June 12, 2001Assignee: Closure Medical CorporationInventors: Bernard Malofsky, Ibraheem T. Badejo
-
Patent number: 6066203Abstract: This invention relates to pigment derivatives having the formula ##STR1## wherein Q represents an organic pigment moiety;X is -SO.sub.2 - or -CO-;Alk is C.sub.2 -C.sub.8 alkylene or substituted C.sub.2 -C.sub.8 alkylene;m is an integer of from 1 to 4;n and p are independently integers of from 2 to 6.This invention further relates to the treatment of organic pigments with such pigment derivatives and the use of such treated pigments in coating compositions.Type: GrantFiled: May 1, 1998Date of Patent: May 23, 2000Assignee: Bayer CorporationInventors: Ibraheem T. Badejo, Daphne J. Rice
-
Patent number: 6031100Abstract: This invention relates to a process for the preparation of quinacridone pigments by(a) exposing a reaction mixture containing(i) 2,5-dianilinoterephthalic acid, 2,5-dianilino-3,6-dihydroterephthalic acid, 2,5-dianilino-3,6-dioxo-1,4-cyclohexadiene-1,4-dicarboxylic acid, and/or derivatives thereof,(ii) about 3 to about 20 parts by weight, per part of component (a)(i), of a dehydrating agent, and(iii) 0 to about 20 parts by weight, per part of component (a)(i), of a pigment additive,to microwave radiation under conditions that raise the bulk temperature of the reaction mixture to no more than about 250.degree. C.Type: GrantFiled: April 20, 1998Date of Patent: February 29, 2000Assignee: Bayer CorporationInventor: Ibraheem T. Badejo
-
Patent number: 5972099Abstract: This invention relates to a process for preparing pigment compositions by(a) treating an organic pigment with(1) a sterically hindered and/or bulky primary amine, and(2) a liquid in which the organic pigment is insoluble, and(b) blending the resultant surface-treated pigment composition from step (a) with a pigment derivative of formula (I) ##STR1## wherein Q represents an organic pigment moiety,X is O, S, NR.sup.1, --SO.sub.2 --, --CO--, --Alk--, --Ar--, or combinations thereof,Y is --OR.sup.2, --NR.sup.3 R.sup.4, or Het,Alk is C.sub.1 -C.sub.5 alkylene, C.sub.2 -C.sub.5 alkenylene, or C.sub.4 -C.sub.5 alkadienylene, or substituted derivatives thereof,Ar is arylene,R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are independently hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.5 -C.sub.7 cycloalkyl, C.sub.7 -C.sub.16 aralkyl, or C.sub.6 -C.sub.10 aryl,Het is a heterocycle, andn is 1 to 4.Type: GrantFiled: December 17, 1997Date of Patent: October 26, 1999Assignee: Bayer CorporationInventors: Ibraheem T. Badejo, Daphne J. Rice, Michael J. Greene
-
Patent number: 5879444Abstract: This invention relates to pigment compositions containing an organic pigment treated with a pigment derivative having the formula (I) ##STR1## wherein Q represents an organic pigment moiety;X is O, S, or N--R.sup.1 ;Y is N--R.sup.2, O, or a direct bond;Z is --CO--, --Alk--, --Ar--, or chemically reasonable combinations thereof;Alk is C.sub.1 -C.sub.5 alkylene, C.sub.2 -C.sub.5 alkenylene, or C.sub.4 -C.sub.5 alkadienylene, or substituted derivatives thereof;Ar is arylene;R.sup.1 is hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.7 -C.sub.16 aralkyl, or --CN; andR.sup.2 is hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.5 -C.sub.7 cycloalkyl, C.sub.7 -C.sub.16 aralkyl, or C.sub.6 -C.sub.10 aryl;with the provisos that(1) the cyclic moiety represented by the formula ##STR2## must be a four- to seven-membered ring, (2) Z can contain a C.dbd.O group adjacent to the nitrogen atom of the Q--CH.sub.2 --N moiety only if Y is N--R.sup.2 or O, and(3) X can be O only if Y is N--R.sup.2 or O.Type: GrantFiled: September 2, 1997Date of Patent: March 9, 1999Assignee: Bayer CorporationInventors: Ibraheem T. Badejo, Daphne J. Rice
-
Patent number: 5868828Abstract: This invention relates to quinacridone pigments of formula (I) ##STR1## wherein X is O, S, or NR;R is hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.5 -C.sub.7 cycloalkyl, or C.sub.7 -C.sub.16 aralkyl;Y is C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, or halogen;the dashed line represents an optional double bond;R.sup.1 and R.sup.2 are independently hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.5 -C.sub.7 cycloalkyl, C.sub.6 -C.sub.10 aryl, C.sub.7 -C.sub.16 aralkyl, nitrile, or carboxyl or an ester or an amide thereof, or R.sup.1 and R.sup.2 together form a C.sub.5 -C.sub.8 cycloaliphatic ring or a fused-on aromatic or heteroaromatic ring;R.sup.3 is hydrogen or C.sub.1 -C.sub.6 alkyl; andm is 0, 1, or 2.This invention further relates to the preparation and use of such quinacridone pigments.Type: GrantFiled: May 20, 1998Date of Patent: February 9, 1999Assignee: Bayer CorporationInventors: Ibraheem T. Badejo, Guenter Franke
-
Patent number: 5755873Abstract: This invention relates to a process for the preparation of quinacridone pigments by(a) heating a reaction mixture comprising(i) a 2,5-dianilinoterephthalic acid, a 2,5-dianilino-3,6-dihydroterephthalic acid, or a 2,5-dianilino-3,6-dioxo-1,4-cyclohexadiene-1,4-dicarboxylic acid;(ii) about 0.1 to about 15 percent by weight, based on component (a)(i), of one or more sulfonyl-containing derivatives of 2,5-dianilinoterephthalic acid, 2,5-dianilino-3,6-dihydroterephthalic acid, and/or 2,5-dianilino-3,6-dioxo-1,4-cyclohexadiene-1,4-dicarboxylic acid; and(iii) about 3 to about 20 parts by weight, per part of component (a)(i), of a dehydrating agent,with the proviso that if either component (a)(i) or component (a)(ii) is a 2,5-dianilino-3,6-dihydroterephthalic acid or derivative thereof, reaction step (a) additionally comprises an oxidation step;(b) drowning the reaction mixture from step (a) with a liquid in which the quinacridone pigment is substantially insoluble; and(c) isolating the quinacridone pigment.Type: GrantFiled: November 18, 1996Date of Patent: May 26, 1998Assignee: Bayer CorporationInventors: Ibraheem T. Badejo, John F. Britanak, Daphne J. Rice
-
Patent number: 5741356Abstract: This invention relates to a process for preparing pigment compositions comprising(a) treating an organic pigment with(1) about 0.1 to about 100% by weight, relative to the organic pigment, of a sterically hindered and/or bulky primary amine,(2) 0 to about 100% by weight, relative to the organic pigment, of a surfactant, and(3) about 5 to about 15 parts by weight per part by weight of the organic pigment of a liquid in which the organic pigment is substantially insoluble,thereby forming a suspension of the surface-treated pigment composition in the liquid;(b) exposing the suspension to cavitating conditions; and(c) collecting the pigment composition.Type: GrantFiled: December 20, 1996Date of Patent: April 21, 1998Assignee: Bayer CorporationInventors: Ibraheem T. Badejo, Charles E. Shannon, Guenter G. Franke
-
Patent number: 5728206Abstract: This invention relates to a process for preparing pigment compositions comprising(a) treating an organic pigment with(1) about 0.1 to about 100% by weight, relative to the organic pigment, of a tertiary alkyl primary amine having the formula (I) ##STR1## wherein R.sup.1 is a C.sub.5 -C.sub.30 (cyclo)aliphatic group, andR.sup.2 and R.sup.3 are independently C.sub.1 -C.sub.6 alkyl,(2) 0 to about 100% by weight, relative to the organic pigment, of a surfactant, and(3) about 5 to about 15 parts by weight per part by weight of the organic pigment of a liquid in which the organic pigment is substantially insoluble,thereby forming a suspension of the surface-treated pigment composition in the liquid; and(b) collecting the pigment composition.Type: GrantFiled: December 20, 1996Date of Patent: March 17, 1998Assignee: Bayer CorporationInventor: Ibraheem T. Badejo
-
Patent number: 5713999Abstract: This invention relates to a process for the preparation of quinacridone pigments by(a) heating, at a temperature of about 80.degree. C. to about 145.degree. C., a reaction mixture containing(i) 2,5-dianilinoterephthalic acid, a 2,5-dianilino-3,6-dihydroterephthalic acid ester, and/or a derivative thereof,(ii) about 3 to about 15 parts by weight, per part of component (a)(i), of a dehydrating agent, and(iii) about 0.Type: GrantFiled: April 29, 1996Date of Patent: February 3, 1998Assignee: Bayer CorporationInventors: Ibraheem T. Badejo, Margot Campos, Michael J. Greene, Daphne J. Rice
-
Patent number: 5711800Abstract: This invention relates to pigment compositions comprising an organic pigment treated with about 0.1 to about 20% by weight, based on the organic pigment, of an N-heteroarylamidomethyl pigment derivative having the formula (I) ##STR1## wherein, Q represents an organic pigment moiety,NHet represents a nitrogen-containing heteroaromatic group attached at a ring nitrogen atom to the carbonyl function of the amidomethyl linking group, andn is from 1 to 4.Type: GrantFiled: December 31, 1996Date of Patent: January 27, 1998Assignee: Bayer CorporationInventors: Ibraheem T. Badejo, John F. Britanak, Margot Campos, Daphne J. Rice, Niran Nugara
-
Patent number: 5698024Abstract: This invention relates to pigment compositions comprising an organic pigment treated with about 0.1 to about 20% by weight, based on the organic pigment, of a compound having the formula (I) ##STR1## wherein Q represents an organic pigment moiety,X is O or S,Het represents a heteroaromatic group attached at a ring carbon atom to the (thio)amidomethyl --CH.sub.2 --NH--CX-- linking group, andn is from 1 to 4.Type: GrantFiled: December 31, 1996Date of Patent: December 16, 1997Assignee: Bayer CorporationInventors: Ibraheem T. Badejo, Daphne J. Rice
-
Patent number: 5683502Abstract: This invention relates to a process for the preparation of quinacridone pigments by(a) heating, at a temperature of about 80.degree. C. to about 145.degree. C., a reaction mixture containing(i) 2,5-dianilinoterephthalic acid, a 2,5-dianilino-3,6-dihydroterephthalic acid ester, and/or a derivative thereof,(ii) about 3 to about 15 parts by weight, per part of component (a)(i), of a dehydrating agent, and(iii) about 0.Type: GrantFiled: April 29, 1996Date of Patent: November 4, 1997Assignee: Bayer CorporationInventors: Ibraheem T. Badejo, Daphne J. Rice