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).

  • Patent number: 5523374
    Abstract: 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: Grant
    Filed: October 26, 1993
    Date of Patent: June 4, 1996
    Assignee: Hercules Incorporated
    Inventors: John K. Bard, Richard L. Brady, Raymond T. Leibfried, De K. Loo
  • Patent number: 5466512
    Abstract: 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: Grant
    Filed: September 24, 1993
    Date of Patent: November 14, 1995
    Assignee: Hercules Incorporated
    Inventors: Laura M. Babcock, John K. Bard, Raymond T. Leibfried, Sr.
  • Patent number: 5466728
    Abstract: 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: Grant
    Filed: September 24, 1993
    Date of Patent: November 14, 1995
    Assignee: Hercules Incorporated
    Inventors: Laura M. Babcock, John K. Bard, Raymond T. Leibfried, Sr.
  • Patent number: 5451637
    Abstract: 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: Grant
    Filed: May 10, 1994
    Date of Patent: September 19, 1995
    Assignee: Hercules Incorporated
    Inventor: Raymond T. Leibfried
  • Patent number: 5391678
    Abstract: 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: Grant
    Filed: December 3, 1992
    Date of Patent: February 21, 1995
    Assignee: Hercules Incorporated
    Inventors: John K. Bard, Richard L. Brady, Raymond T. Leibfried, Sr., Dekai Loo
  • Patent number: 5298536
    Abstract: 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: Grant
    Filed: February 21, 1992
    Date of Patent: March 29, 1994
    Assignee: Hercules Incorporated
    Inventors: Laura M. Babcock, John K. Bard, Raymond T. Leibfried, Sr.
  • Patent number: 5260377
    Abstract: 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: Grant
    Filed: November 5, 1992
    Date of Patent: November 9, 1993
    Assignees: University of Southern California, Hercules Incorporated
    Inventors: William P. Weber, Raymond T. Leibfried, Xiugao Liao
  • Patent number: 5196498
    Abstract: 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: Grant
    Filed: September 24, 1991
    Date of Patent: March 23, 1993
    Assignee: Hercules Incorporated
    Inventor: Raymond T. Leibfried, Sr.
  • Patent number: 5124423
    Abstract: 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: Grant
    Filed: January 5, 1990
    Date of Patent: June 23, 1992
    Assignee: Hercules Incorporated
    Inventor: Raymond T. Leibfried
  • Patent number: 5124375
    Abstract: 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: Grant
    Filed: January 5, 1990
    Date of Patent: June 23, 1992
    Assignee: Hercules Incorporated
    Inventor: Raymond T. Leibfried
  • Patent number: 5077134
    Abstract: 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: Grant
    Filed: October 10, 1989
    Date of Patent: December 31, 1991
    Assignee: Hercules Incorporated
    Inventor: Raymond T. Leibfried, Sr.
  • Patent number: 5013809
    Abstract: 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: Grant
    Filed: October 10, 1989
    Date of Patent: May 7, 1991
    Assignee: Hercules Incorporated
    Inventor: Raymond T. Leibfried, Sr.
  • Patent number: 4902731
    Abstract: 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: Grant
    Filed: August 16, 1988
    Date of Patent: February 20, 1990
    Assignee: Hercules Incorporated
    Inventor: Raymond T. Leibfried
  • Patent number: 4900779
    Abstract: 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: Grant
    Filed: July 30, 1987
    Date of Patent: February 13, 1990
    Assignee: Hercules Incorporated
    Inventor: Raymond T. Leibfried