Patents by Inventor Raymond T. Leibfried
Raymond T. Leibfried 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: 5523374Abstract: Curable compositions including epoxy-functional compounds and polyenes, as well as cyclic polysiloxanes, and/or tetrahedral siloxysilanes, and/or linear polysiloxanes; along with, or instead of these polyenes and silicon compositions, crosslinkable prepolymers prepared from such polyenes and silicon compounds may be included. A curing agent, and yet additionally, a curing accelerator, may also be included. These compositions can be thermally cured, in the presence of hydrosilation catalysts.Type: GrantFiled: October 26, 1993Date of Patent: June 4, 1996Assignee: Hercules IncorporatedInventors: John K. Bard, Richard L. Brady, Raymond T. Leibfried, De K. Loo
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Patent number: 5466512Abstract: Disclosed are flame retardant organosilicon compositions, wherein the organosilicon compositions comprise residues derived from (a) polycyclic polyene compounds and (b) residues derived from cyclic polysiloxanes, tetrahedral siloxysilanes and linear poly(organohydrosilioxane)s. Preferably the compositions contain flame retardants, such as a phosphorus containing or halogen containing flame retardant, which may be microencapsulated. Also disclosed are processes for making such compositions and articles made from such compositions.Type: GrantFiled: September 24, 1993Date of Patent: November 14, 1995Assignee: Hercules IncorporatedInventors: Laura M. Babcock, John K. Bard, Raymond T. Leibfried, Sr.
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Patent number: 5466728Abstract: Disclosed are flame retardant organosilicon compositions, wherein the organosilicon compositions comprise residues derived from (a) polycyclic polyene compounds and (b) residues derived from cyclic polysiloxanes, tetrahedral siloxysilanes and linear poly(organohydrosiloxane)s. Preferably the compositions contain flame retardants, such as a phosphorus containing or halogen containing flame retardant, which may be microencapsulated. Also disclosed are processes for making such compositions and articles made from such compositions.Type: GrantFiled: September 24, 1993Date of Patent: November 14, 1995Assignee: Hercules IncorporatedInventors: Laura M. Babcock, John K. Bard, Raymond T. Leibfried, Sr.
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Patent number: 5451637Abstract: Crosslinkable and crosslinked compositions comprising silicon compounds, unsaturated elastomeric polymers and polyenes. Along with, or instead of these polyenes and silicon compounds, crosslinkable prepolymers prepared from such polyenes and silicon compounds may be included. Crosslinking, of the crosslinkable compositions, may be accomplished by hydrozilation, in the presence of hydrosylation catalysts.Type: GrantFiled: May 10, 1994Date of Patent: September 19, 1995Assignee: Hercules IncorporatedInventor: Raymond T. Leibfried
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Patent number: 5391678Abstract: Curable compositions including epoxy-functional compounds and polyenes, as well as cyclic polysiloxanes, and/or tetrahedral siloxysilanes, and/or linear polysiloxanes; along with, or instead of these polyenes and silicon compositions, crosslinkable prepolymers prepared from such polyenes and silicon compounds may be included. A curing agent, and yet additionally, a curing accelerator, may also be included. These compositions can be thermally cured, in the presence of hydrosilation catalysts.Type: GrantFiled: December 3, 1992Date of Patent: February 21, 1995Assignee: Hercules IncorporatedInventors: John K. Bard, Richard L. Brady, Raymond T. Leibfried, Sr., Dekai Loo
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Patent number: 5298536Abstract: Disclosed are flame retardant organosilicon compositions, wherein the organosilicon compositions comprise residues derived from (a) polycyclic polyene compounds and (b) residues derived from cyclic polysiloxanes, tetrahedral siloxysilanes and linear poly(organohydrosiloxane)s. Preferably the compositions contain flame retardants, such as a phosphorus containing or halogen containing flame retardant, which may be microencapsulated. Also disclosed are processes for making such compositions and articles made from such compositions.Type: GrantFiled: February 21, 1992Date of Patent: March 29, 1994Assignee: Hercules IncorporatedInventors: Laura M. Babcock, John K. Bard, Raymond T. Leibfried, Sr.
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Patent number: 5260377Abstract: Crosslinkable carbosilane polymer formulations are prepared from saturated or unsaturated carbosilane polymers containing reactive silicon hydride radicals in the polymer chain combined with polycyclic polyene crosslinkers having two or more double bonds that are reactive in the hydrosilation crosslinking reaction.Type: GrantFiled: November 5, 1992Date of Patent: November 9, 1993Assignees: University of Southern California, Hercules IncorporatedInventors: William P. Weber, Raymond T. Leibfried, Xiugao Liao
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Patent number: 5196498Abstract: Organosilicon polymers of polycyclic polyenes, cyclic polysiloxanes and/or tetrahedral siloxysilanes, and unsaturated hydrocarbyl group-bearing silicon compounds. The polymers are prepared by reacting the indicated compounds together, or by reacting the hydrocarbyl group-bearing silicon compounds with prepolymers of the polycyclic polyenes and cyclic polysiloxanes and/or tetrahedral siloxysilanes.Type: GrantFiled: September 24, 1991Date of Patent: March 23, 1993Assignee: Hercules IncorporatedInventor: Raymond T. Leibfried, Sr.
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Patent number: 5124423Abstract: Novel thermoset and thermoplastic organosilicon polymers, comprised substantially of alternating polycyclic hydrocarbon residues and cyclic polysiloxane or tetrahedral siloxysilane residues linked through carbon-silicon bonds, are disclosed.Type: GrantFiled: January 5, 1990Date of Patent: June 23, 1992Assignee: Hercules IncorporatedInventor: Raymond T. Leibfried
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Patent number: 5124375Abstract: A novel organosilicon prepolymer, which is the partial reaction product of (a) a cyclic polysiloxane or a tetrahedral siloxysilane containing at least two hydrosilane groups and (b) a polycyclic polyene having in its rings at least two chemically distinguishable carbon-carbon double bonds, wherein the ratio of carbon-carbon double bonds in the rings of (b) to hydrosilane groups in (a) is greater than 0.5:1 and up to 1.8:1, and at least one of the compounds (a) and (b) has more than two reactive sites, a method for making the organosilicon prepolymer, and a method for preparing an organosilicon polymer therefrom, are disclosed.Type: GrantFiled: January 5, 1990Date of Patent: June 23, 1992Assignee: Hercules IncorporatedInventor: Raymond T. Leibfried
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Patent number: 5077134Abstract: A crosslinked organosilicon polymer or crosslinkable organosilicon prepolymer comprising alternating (a) polycyclic polyene residues and (b) polysiloxane/siloxysilane residues linked through carbon to silicon bonds, wherein the polycyclic polyene residues are derived from polycyclic polyenes having at least two non-aromatic carbon-carbon double bonds in their rings and the polysiloxane/siloxysilane residues are derived from (i) cyclic polysiloxanes or tetrahedral siloxysilanes and (ii) linear, .tbd.SiH terminated polysiloxanes.Type: GrantFiled: October 10, 1989Date of Patent: December 31, 1991Assignee: Hercules IncorporatedInventor: Raymond T. Leibfried, Sr.
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Patent number: 5013809Abstract: Organosilicon prepolymer compositions which are the reaction products of (a) at least one of cyclic polysiloxanes or tetrahedral siloxysilanes containing at least two .tbd.SiH groups and (b) polycyclic polyenes having at least two non-aromatic, non-conjugated carbon-carbon double bonds in their rings, wherein the total ratio of the non-aromatic, non-conjugated carbon-carbon double bonds in the rings of (b) to .tbd.SiH groups in (a) in greater than 1.8:1 and either the .tbd.SiH containing compounds (a) or the polycyclic polyenes (b) have more than two reactive sites. The organosilicon compositions are blended with (c) at least one of additional cyclic polysiloxanes, additional tetrahedral siloxysilanes or linear, short chain .tbd.SiH terminated polysiloxanes to make fluid hydrosilation compositions. These storable blends are polymerized to thermally stable thermoset polymers.Type: GrantFiled: October 10, 1989Date of Patent: May 7, 1991Assignee: Hercules IncorporatedInventor: Raymond T. Leibfried, Sr.
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Patent number: 4902731Abstract: A novel organosilicon prepolymer, which is the partial reaction product of (a) a cyclic polysiloxane or a tetrahedral siloxysilane containing at least two hydrosilane groups and (b) a polycyclic polyene having in its rings at least two chemically distinguishable carbon-carbon double bonds, wherein the ratio of carbon-carbon double bonds in the rings of (b) to hydrosilane groups in (a) is greater than 0.5:1 and up to 1.8:1, and at least one of the compounds (a) and (b) has more than two reactive sites, a method for making the organosilicon prepolymer, and a method for preparing an organosilicon polymer therefrom, are disclosed.Type: GrantFiled: August 16, 1988Date of Patent: February 20, 1990Assignee: Hercules IncorporatedInventor: Raymond T. Leibfried
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Patent number: 4900779Abstract: Novel thermoset and thermoplastic organosilicon polymers, comprised substantially of alternating polycyclic hydrocarbon residues and cyclic polysiloxane or tetrahedral siloxysilane residues linked through carbon-silicon bonds, are disclosed.Type: GrantFiled: July 30, 1987Date of Patent: February 13, 1990Assignee: Hercules IncorporatedInventor: Raymond T. Leibfried