Patents by Inventor Gaetano F. D'Alelio
Gaetano F. D'Alelio 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: 5290908Abstract: Aromatic polyimides with acetylenic end groups are cured by coupling together thermally or catalytically using cuprous salts as catalysts to increase molecular weight with little or no by-product formation. These polyimides can be shaped and formed prior to the coupling.The acetylenic end-capped aromatic polyimides are formed by the reaction of an aromatic dianhydride, an acetylenic organic monoamine compound which will provide the reactive end groups and optionally an aromatic diamine.Type: GrantFiled: January 24, 1975Date of Patent: March 1, 1994Assignee: The University of Notre Dame du LacInventor: Gaetano F. D'Alelio
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Patent number: 4537947Abstract: Aromatic polyimides with various functional end-groups such as --CH.dbd.CH.sub.2, --C.tbd.CH, --CN and --CHO are chain-extended (molecular weight increased) by reacting the functional groups with aromatic bis-dipoles. A representative bis-dipole is 1,4-benzene-dinitrile oxide. These polyimides can be shaped and formed prior to chain extending.The aromatic polyimides appropriate for chain-extending are formed by the reaction of aromatic dianhydrides, aromatic amines and monoamines which contain the functional groups.Type: GrantFiled: March 14, 1975Date of Patent: August 27, 1985Assignee: University of Notre Dame du LacInventor: Gaetano F. D'Alelio
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Patent number: 4528373Abstract: Novel, unsaturated vinylacetylene-terminated polyimides and processes for their preparation are disclosed herein. These new polyimides are derivatives of anhydride-terminated aromatic polyimides from which they can be prepared by amidation to provide new unsaturated amide groups having a terminal group containing the structure--CH.dbd.CH--C.tbd.C-- or--C.tbd.C--CH.dbd.CH--, hereinafter sometimes referred to as "conjugated enynes". These new compositions are more tractable than the original anhydride-terminated polyimides and can be converted at appropriate lower temperatures to crosslinked, insoluble, infusible polymers without by-product formation, thereby extending greatly the applications for which the aromatic polyimides can be employed. Moreover, these new polyimides can undergo the Diels-Alder type of addition with a large number of dienophiles. Certain monomeric materials are also described.Type: GrantFiled: December 27, 1983Date of Patent: July 9, 1985Assignee: Plastics Engineering CompanyInventors: Gaetano F. D'Alelio, deceased, Phillip A. Waitkus
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Patent number: 4528349Abstract: Novel, unsaturated vinylacetylene-terminated polyimides and processes for their preparation are disclosed herein. These new polyimides are derivatives of anhydride-terminated aromatic polyimides from which they can be prepared by amidation to provide new unsaturated amide groups having a terminal group containing the structure --CH.dbd.CH--C.tbd.C-- or --C.tbd.C--CH.dbd.CH--, hereinafter sometimes referred to as "conjugated enynes". These new compositions are more tractable than the original anhydride-terminated polyimides and can be converted at appropriate lower temperatures to crosslinked, insoluble, infusible polymers without by-product formation, thereby extending greatly the applications for which the aromatic polyimides can be employed. Moreover, these new polyimides can undergo the Diels-Alder type of addition with a large number of dienophiles. Certain monomeric materials are also described.Type: GrantFiled: December 12, 1983Date of Patent: July 9, 1985Assignee: Plastics Engineering CompanyInventors: Gaetano F. D'Alelio, deceased, Phillip A. Waitkus
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Patent number: 4520198Abstract: Novel, unsaturated vinylacteylene-terminated polyimides and processes for their preparation are disclosed herein. These new polyimides are derivatives of anhydride-terminated aromatic polyimides from which they can be prepared by amidation to provide new unsaturated amide groups having a terminal group containing the structure --CH.dbd.CH--C.tbd.C-- or --C.tbd.C--CH.dbd.CH--, hereinafter sometimes referred to as "conjugated enynes". These new compositions are more tractable than the original anhydride-terminated polyimides and can be converted at appropriate lower temperatures to crosslinked, insoluble, infusible polymers without by-product formation, thereby extending greatly the applications for which the aromatic polyimides can be employed. Moreover, these new polyimides can undergo the Diels-Alder type of addition with a large number of dienophiles. Certain monomeric materials are also described.Type: GrantFiled: December 27, 1983Date of Patent: May 28, 1985Assignee: Plastics Engineering CompanyInventors: Gaetano F. D'Alelio, deceased, Phillip A. Waitkus
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Patent number: 4517364Abstract: Novel, unsaturated vinylacteylene-terminated polyimides and processes for their preparation are disclosed herein. These new polyimides are derivatives of anhydride-terminated aromatic polyimides from which they can be prepared by amidation to provide new unsaturated amide groups having a terminal group containing the structure --CH.dbd.CH--C.tbd.C-- or --C.tbd.C--CH.dbd.CH--, hereinafter sometimes referred to as "conjugated enynes". These new compositions are more tractable than the original anhydride-terminated polyimides and can be converted at appropriate lower temperatures to crosslinked, insoluble, infusible polymers without by-product formation, thereby extending greatly the applications for which the aromatic polyimides can be employed. Moreover, these new polyimides can undergo the Diels-Alder type of addition with a large number of dienophiles. Certain monomeric materials are also described.Type: GrantFiled: December 27, 1983Date of Patent: May 14, 1985Assignee: Plastics Engineering CompanyInventors: Gaetano F. D'Alelio, deceased, Phillip A. Waitkus
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Patent number: 4517363Abstract: Novel, unsaturated vinylacteylene-terminated polyimides and processes for their preparation are disclosed herein. These new polyimides are derivatives of anhydride-terminated aromatic polyimides from which they can be prepared by amidation to provide new unsaturated amide groups having a terminal group containing the structure --CH.dbd.CH--C.tbd.C-- or --C.tbd.C--CH.dbd.CH--, hereinafter sometimes referred to as "conjugated enynes". These new compositions are more tractable than the original anhydride-terminated polyimides and can be converted at appropriate lower temperatures to crosslinked, insoluble, infusible polymers without by-product formation, thereby extending greatly the applications for which the aromatic polyimides can be employed. Moreover, these new polyimides can undergo the Diels-Alder type of addition with a large number of dienophiles. Certain monomeric materials are also described.Type: GrantFiled: December 12, 1983Date of Patent: May 14, 1985Assignee: Plastics Engineering CompanyInventors: Gaetano F. D'Alelio, deceased, Phillip A. Waitkus
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Patent number: 4517354Abstract: The compositions disclosed herein comprise compounds of the formula:DOOCArO-ArSO.sub.2 Ar'QAr'SO.sub.2 Ar-OArCOOD (I)and also derivatives and polymers therefrom or from the compound:X-ArSO.sub.2 Ar'QAr'SO.sub.2 Ar-Xin which compounds D is hydrogen, halogen or a monovalent hydrocarbon radical, preferably of 1-20 carbon atoms; Q is either --O-- or --SO.sub.2 --; Ar and Ar' are divalent aromatic groups including a multiplicity of aromatic groups linked by O, SO.sub.2, hydrocarbon groups, etc.; and X is preferably Cl but may be other halogen atoms. In these compounds, the central core or residue --ArSO.sub.2 Ar'QAr'SO.sub.2 Ar-- may be represented by A. Various derivatives and polymers having the core A are prepared, such as diamides of the formula R.sub.2 NOCArO-A-OArCONR.sub.2 ; polyester polymers of the formula [--OROOCArO-A-OArCO--]; polyarylate polymers of the formula [--ArCOOArO-A-OArOOCArCOO--]; polycarbonate polymers of the formula [--OCOOArO-A-OArOOCO--]; phenolic resins, and many other derivatives.Type: GrantFiled: October 31, 1983Date of Patent: May 14, 1985Assignee: Plastics Engineering CompanyInventor: Gaetano F. D'Alelio, deceased
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Patent number: 4477439Abstract: The treatment described herein comprises the process of reducing the soreness of irritated or excoriated areas surrounding the stoma of ostomy patients by the application of a sulfate or phosphate of barium, calcium, strontium or zinc, preferably barium sulfate. This finely divided powder may be in the form of a dry powder, an aqueous suspension or paste, or an ointment or cream. This treatment brings relief in a short time and curing of the irritation, generally within 24 hours or more.Type: GrantFiled: April 13, 1981Date of Patent: October 16, 1984Assignee: Walter J. MonacelliInventor: Gaetano F. D'Alelio, deceased
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Patent number: 4451402Abstract: Novel, unsaturated diacteylene-terminated polyimides and processes for their preparation are disclosed herein. These new polyimides are derivatives of anhydride-terminated aromatic polyimides from which they can be prepared by amidation to provide new unsaturated amide groups having a terminal group containing the structure --C.tbd.C--C.tbd.C--, hereinafter sometimes referred to as "conjugated diynes". These new compositions are more tractable than the original anhydride-terminated polyimides and can be converted at appropriate lower temperatures to crosslinked, insoluble, infusible polymers without by-product formation, thereby extending greatly the applications for which the aromatic polyimides can be employed. Moreover, these new polyimides can undergo the Diels-Alder type of addition with a large number of dienophiles. Certain monomeric materials are also described.Type: GrantFiled: March 2, 1982Date of Patent: May 29, 1984Assignee: Plastics Engineering CompanyInventors: Gaetano F. D'Alelio, deceased, Phillip A. Waitkus
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Patent number: 4451669Abstract: Novel compositions comprising acetylenic polyhemi-amic acid compositions and processes for their preparation are disclosed herein. These new compositions are primarily derivatives of anhydride-terminated aromatic polyimides from which they are prepared by amidation to provide acetylenic amide groups having terminal --C.tbd.CH groups as hemi-amic acid groups or their derivatives. These new compositions are more tractable than the original anhydride-terminated polyimides and can be converted at appropriate lower temperatures to crosslinked, insoluble, infusible polymers without by-product formation thereby extending greatly the applications for which the aromatic polyimides can be employed. Also included are monomeric compounds containing acetylenic amide groups derived from monomeric tetracarboxylic dianhydrides. These are particularly useful as crosslinking agents.Type: GrantFiled: November 16, 1981Date of Patent: May 29, 1984Assignee: Plastics Engineering CompanyInventors: Gaetano F. D'Alelio, Phillip A. Waitkus
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Patent number: 4435323Abstract: Novel, unsaturated vinylacetylene-terminated polyimides and processes for their preparation are disclosed herein. These new polyimides are derivatives of anhydride-terminated aromatic polyimides from which they can be prepared by amidation to provide new unsaturated amide groups having a terminal group containing the structure --CH.dbd.CH--C.tbd.C-- or --C.tbd.C--CH.dbd.CH--, hereinafter sometimes referred to as "conjugated enynes". These new compositions are more tractable than the original anhydride-terminated polyimides and can be converted at appropriate lower temperatures to crosslinked, insoluble, infusible polymers without by-product formation, thereby extending greatly the applications for which the aromatic polyimides can be employed. Moreover, these new polyimides can undergo the Diels-Alder type of addition with a large number of dienophiles. Certain monomeric materials are also described.Type: GrantFiled: March 2, 1982Date of Patent: March 6, 1984Assignee: Plastics Engineering CompanyInventors: Gaetano F. D'Alelio, deceased, Phillip A. Waitkus
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Patent number: 4405520Abstract: Novel, unsaturated diacetylene-terminated polyimides and processes for their preparation are disclosed herein. These new polyimides are derivatives of anhydride-terminated aromatic polyimides from which they can be prepared by amidation to provide new unsaturated amide groups having a terminal group containing the structure --C.tbd.C--C.tbd.C--, hereinafter sometimes referred to as "conjugated diynes". These new compositions are more tractable than the original anhydride-terminated polyimides and can be converted at appropriate lower temperatures to crosslinked, insoluble, infusible polymers without by-product formation, thereby extending greatly the applications for which the aromatic polyimides can be employed. Moreover, these new polyimides can undergo the Diels-Alder type of addition with a large number of dienophiles. Certain monomeric materials are also described.Type: GrantFiled: March 2, 1982Date of Patent: September 20, 1983Assignee: Plastics Engineering CompanyInventors: Gaetano F. D'Alelio, deceased, Phillip A. Waitkus
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Patent number: 4405786Abstract: Novel, unsaturated diacteylene-terminated polyimides and processes for their preparation are disclosed herein. These new polyimides are derivaties of anhydride-terminated aromatic polyimides from which they can be prepared by amidation to provide new unsaturated amide groups having a terminal group containing the structure --C.tbd.C--C.tbd.C--, hereinafter sometimes referred to as "conjugated diynes". These new compositions are more tractable than the original anhydride-terminated polyimides and can be converted at appropriate lower temperatures to crosslinked, insoluble, infusible polymers without by-product formation, thereby extending greatly the applications for which the aromatic polyimides can be employed. Moreover, these new polyimides can undergo the Diels-Alder type of addition with a large number of dienophiles. Certain monomeric materials are also described.Type: GrantFiled: March 2, 1982Date of Patent: September 20, 1983Assignee: Plastics Engineering CompanyInventors: Gaetano F. D'Alelio, deceased, Phillip A. Waitkus
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Patent number: 4405521Abstract: Novel, unsaturated diacteylene-terminated polyimides and processes for their preparation are disclosed herein. There new polyimides are derivatives of anhydride-terminated aromatic polyimides from which they can be prepared by amidation to provide new unsaturated amide groups having a terminal group containing the structure --C.tbd.C--C.tbd.C--, hereinafter sometimes referred to as "conjugated diynes". These new compositions are more tractable than the original anhydride-terminated polyimides and can be converted at appropriate lower temperatures to crosslinked, insoluble, infusible polymers without by-product formation, thereby extending greatly the applications for which the aromatic polyimides can be employed. Moreover, these new polyimides can undergo the Diels-Alder type of addition with a large number of dienophiles. Certain nonomeric materials are also described.Type: GrantFiled: March 2, 1982Date of Patent: September 20, 1983Assignee: Plastics Engineering CompanyInventors: Gaetano F. D'Alelio, deceased, Phillip A. Waitkus
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Patent number: 4405519Abstract: Novel, unsaturated diacetylene-terminated polyimides and processes for their preparation are disclosed herein. These new polyimides are derivatives of anhydride-terminated aromatic polyimides from which they can be prepared by amidation to provide new unsaturated amide groups having a terminal group containing the structure --C.tbd.C--C.tbd.C--, hereinafter sometimes referred to as "conjugated diynes." These new compositions are more tractable than the original anhydride-terminated polyimides and can be converted at appropriate lower temperatures to crosslinked, insoluble, infusible polymers without by-product formation, thereby extending greatly the applications for which the aromatic polyimides can be employed. Moreover, these new polyimides can undergo the Diels-Alder type of addition with a large number of dienophiles. Certain monomeric materials are also described.Type: GrantFiled: March 2, 1982Date of Patent: September 20, 1983Assignee: Plastics Engineering CompanyInventors: Gaetano F. D'Alelio, deceased, Phillip A. Waitkus
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Addition products of terminally unsaturated polyimide derivatives with a diaryl conjugated butadiyne
Patent number: 4404139Abstract: Novel, unsaturated diacteylene-terminated polyimides and processes for their preparation are disclosed herein. These new polyimides are derivatives of anhydride-terminated aromatic polyimides from which they can be prepared by amidation to provide new unsaturated amide groups having a terminal group containing the structure --C.tbd.C--C.tbd.C--, hereinafter sometimes referred to as "conjugated diynes". These new compositions are more tractable than the original anhydride-terminated polyimides and can be converted at appropriate lower temperature to crosslinked, insoluble, infusible polymers without by-product formation, thereby extending greatly the applications for which the aromatic polyimides can be employed. Moreover, these new polyimides can undergo the Diels-Alder type of addition with a large number of dienophiles. Certain monomeric materials are also described.Type: GrantFiled: March 2, 1982Date of Patent: September 13, 1983Assignee: Plastics Engineering CompanyInventors: Gaetano F. D'Alelio, deceased, Phillip A. Waitkus -
Patent number: 4402878Abstract: Novel, unsaturated diacteylene-terminated polyimides and processes for their preparation are disclosed herein. These new polyimides are derivatives of anhydride-terminated aromatic polyimides from which they can be prepared by amidation to provide new unsaturated amide groups having a terminal group containing the structure --C.tbd.C--C.tbd.C--, hereinafter sometimes referred to as "conjugated diynes". These new compositions are more tractable than the original anhydride-terminated polyimides and can be converted at appropriate lower temperatures to crosslinked, insoluble, infusible polymers without by-product formation, thereby extending greatly the applications for which the aromatic polyimides can be employed. Moreover, these new polyimides can undergo the Diels-Alder type of addition with a large number of dienophiles. Certain monomeric materials are also described.Type: GrantFiled: March 2, 1982Date of Patent: September 6, 1983Assignee: Plastics Engineering CompanyInventors: Gaetano F. D'Alelio, deceased, Phillip A. Waitkus
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Patent number: 4402879Abstract: Novel, unsaturated diacteylene-terminated polyimides and processes for their preparation are disclosed herein. These new polyimides are derivatives of anhydride-terminated aromatic polyimides from which they can be prepared by amidation to provide new unsaturated amide groups having a terminal group containing the structure --C.tbd.C--C.tbd.C--, hereinafter sometimes referred to as "conjugated diynes". These new compositions are more tractable than the original anhydride-terminated polyimides and can be converted at appropriate lower temperatures to crosslinked, insoluble, infusible polymers without by-product formation, thereby extending greatly the applications for which the aromatic polyimides can be employed. Moreover, these new polyimides can undergo the Diels-Alder type of addition with a large number of dienophiles. Certain monomeric materials are also described.Type: GrantFiled: March 2, 1982Date of Patent: September 6, 1983Assignee: Plastics Engineering CompanyInventors: Gaetano F. D'Alelio, deceased, Phillip A. Waitkus
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Patent number: 4377536Abstract: Novel compositions comprising unsaturated polyhemi-amic acid compositions and processes for their preparation are disclosed herein. These new compositions are primarily derivatives of anhydride-terminated aromatic polyimides from which they are prepared by amidation to provide unsaturated amide groups having terminal --CH.dbd.CH.sub.2 groups as hemi-amic acid groups or their derivatives. These new compositions are more tractable than the original anhydride-terminated polyimides and can be converted at appropriate lower temperatures to crosslinked, insoluble, infusible polymers without by-product formation thereby extending greatly the applications for which the aromatic polyimides can be employed. Also included are monomeric compounds containing unsaturated amide groups derived from monomeric tetracarboxylic dianhydrides. These are particularly useful as crosslinking agents.Type: GrantFiled: November 16, 1981Date of Patent: March 22, 1983Assignee: Plastics Engineering CompanyInventors: Phillip A. Waitkus, Gaetano F. D'Alelio