David T. Tao
Marriage and Family Therapists at Old Shepherdsville Rd, Louisville, KY
License number
Kentucky 22089
Issued Date
Jul 1, 1982
Expiration Date
Feb 28, 2007
Category
Family Medicine
Type
Private Practice
Address
Address
8006 Old Shepherdsville Rd, Louisville, KY 40219
Education
University of Kentucky College of Medicine, Lexington, 1981
Phone
(502) 969-9393 (Work)
Professional information
Dr. David T Tao, Louisville KY - MD (Doctor of Medicine)
Address:
3904 Springhill Rd, Louisville 40207
(502) 896-8243 (Phone)
(502) 896-8243 (Phone)
Hospitals:
3904 Springhill Rd, Louisville 40207
Education:
Medical Schools
University Of Louisville School Of Medicine
Graduated: 1981
University Of Louisville School Of Medicine
Graduated: 1981
Process For Preventing Gel Formation In Lattices Of Hydrogenated, Low Molecular Weight, Functionalized Elastomers
US Patent:
2007001, Jan 11, 2007
Filed:
Jul 8, 2005
Appl. No.:
11/177759
Inventors:
David Tao - Louisville KY, US
Michael Gozdiff - North Canton OH, US
Edmee Files - Floyds Knobs IN, US
Michael Gozdiff - North Canton OH, US
Edmee Files - Floyds Knobs IN, US
International Classification:
C08K 5/00
US Classification:
524236000, 524565000, 524571000
Abstract:
The present invention discloses a process for hydrogenating a latex of a low molecular weight functionalized, unsaturated elastomer to produce a latex of a hydrogenated, low molecular weight, low gel, functionalized elastomer, said process comprising hydrogenating the low molecular weight, functionalized, unsaturated elastomer in the presence of (1) an oxidant selected from the group consisting of oxygen and hydroperoxides, (2) a reducing agent selected from the group consisting of hydrazine and hydrazine hydrates, and (3) a metal ion activator, wherein a hydroxylamine is added to the latex of the low molecular weight, functionalized, unsaturated elastomer or to the latex of the hydrogenated, low molecular weight, functionalized elastomer prior, during, or subsequent to the hydrogenation to produce the latex of the hydrogenated low molecular weight, low gel, functionalized elastomer.
Process For Preventing Gel Formation In Lattices Of Hydrogenated, Low Molecular Weight, Functionalized Elastomers
US Patent:
2008027, Nov 6, 2008
Filed:
Jul 21, 2008
Appl. No.:
12/176885
Inventors:
David D.H. Tao - Louisville KY, US
Michael Gozdiff - North Canton OH, US
Edmee Files - Floyds Knobs IN, US
Michael Gozdiff - North Canton OH, US
Edmee Files - Floyds Knobs IN, US
Assignee:
ZEON CHEMICALS, L.P. - Louisville KY
International Classification:
C08J 3/03
US Classification:
524457
Abstract:
The present invention discloses a process for hydrogenating a latex of a low molecular weight functionalized, unsaturated elastomer to produce a latex of a hydrogenated, low molecular weight, low gel, functionalized elastomer, said process comprising hydrogenating the low molecular weight, functionalized, unsaturated elastomer in the presence of (1) an oxidant selected from the group consisting of oxygen and hydroperoxides, (2) a reducing agent selected from the group consisting of hydrazine and hydrazine hydrates, and (3) a metal ion activator, wherein a hydroxylamine is added to the latex of the low molecular weight, functionalized, unsaturated elastomer or to the latex of the hydrogenated, low molecular weight, functionalized elastomer prior, during, or subsequent to the hydrogenation to produce the latex of the hydrogenated low molecular weight, low gel, functionalized elastomer. This process can be used to make low molecular weight, hydrogenated, nitrile rubber latex which is comprised of water, an emulsifier, and the low molecular weight, hydrogenated, nitrile rubber, wherein the low molecular weight, hydrogenated, nitrile rubber has a molecular weight which is within the range of 500 to 20,000, wherein the low molecular weight, hydrogenated, nitrile rubber has a gel content of less than 10%, and wherein the low molecular weight, hydrogenated, nitrile rubber has a saturation level of at least about 80%.