David Le clair
Engineering at Barryknoll Ln, Houston, TX
License number
Louisiana PE.0011101
Issued Date
Jan 1, 1900
Category
Civil Engineer
Type
Electrical and Computer Engineer
Address
Address
12419 Barryknoll Ln, Houston, TX 77024
Professional information
Pressure Sensitive Adhesive And Compositions Prepared With Same
US Patent:
2005017, Aug 11, 2005
Filed:
Feb 2, 2005
Appl. No.:
11/049456
Inventors:
David St. Clair - Houston TX, US
Assignee:
KRATON Polymers U.S. LLC - Houston TX
International Classification:
C08L051/08
US Classification:
525063000
Abstract:
Disclosed is a pressure sensitive adhesive comprising a tackifying resin and a block copolymer having the general formula: S1-B1-S2-B2 wherein S1, B1, S2, and B2 are polymer blocks, and B1 is a block of polymerized conjugated diene comprising at least 50 mole percent isoprene and having an apparent molecular weight of from about 150,000 to about 400,000; S1 and S2 are blocks of polymerized mono-vinylaromatic hydrocarbon having a weight average molecular weight of about 12,000 to about 40,000; and B2 is a block of polymerized conjugated diene comprising at least 50 mole percent isoprene having an apparent molecular weight of from about 15,000 to about 60,000. The weight ratio of B1 over B2 is from about 3.0 to about 12.0; and the content of polymerized mono-vinylaromatic hydrocarbon is from about 10 to about 35 weight percent. The pressure sensitive adhesive can be used in the production of a composition comprising a substrate and adherent thereto the adhesive, such as a label, tape, or a disposable product.
Photopolymerizable Compositions And Flexographic Plates Prepared From Controlled Distribution Block Copolymers
US Patent:
2004007, Apr 15, 2004
Filed:
Oct 8, 2003
Appl. No.:
10/681608
Inventors:
David Hansen - Houston TX, US
David St. Clair - Houston TX, US
Donn Dubois - Houston TX, US
Dale Handlin - Houston TX, US
Carl Willis - Houston TX, US
David St. Clair - Houston TX, US
Donn Dubois - Houston TX, US
Dale Handlin - Houston TX, US
Carl Willis - Houston TX, US
International Classification:
C08L053/00
US Classification:
525/089000, 522/109000
Abstract:
The present invention relates to a photopolymerizable composition, which comprises: (a) a block copolymer component comprising an unhydrogenated styrene diene block copolymer and a hydrogenated controlled distribution styrene diene block copolymer (b) one or more photopolymerizable ethylenically unsaturated low molecular weight compounds, (c) one or more polymerization initiators, and optionally (d) from 0 to 40 % by weight, based on the total photopolymerizable compositions, of one or more auxiliaries. The invention also includes flexographic printing plates derived from said photopolymerizable compositions, and flexographic printing relief forms prepared from said plates.
Photocurable Compositions And Flexographic Printing Plates Comprising The Same
US Patent:
2005023, Oct 27, 2005
Filed:
Apr 27, 2004
Appl. No.:
10/832733
Inventors:
David Clair - Houston TX, US
David Hansen - Houston TX, US
Donn Dubois - Houston TX, US
David Hansen - Houston TX, US
Donn Dubois - Houston TX, US
Assignee:
KRATON Polymers U.S. LLC - Houston TX
International Classification:
C08L001/00
US Classification:
524190000
Abstract:
The present invention relates to photocurable compositions for use in flexographic printing plates comprising selectively hydrogenated block copolymers of conjugated dienes and monoalkenyl arenes and flexographic printing plates made from the same. The block copolymers, either linear or radial, have terminal blocks of unsaturated conjugated diene. The block copolymer is further comprised of monoalkenyl arene blocks and hydrogenated conjugated diene blocks. The compositions exhibit exceptional improvement in degree of cure over comparative selectively hydrogenated block copolymers.
Adhesives And Sealants From Controlled Distribution Block Copolymers
US Patent:
2003017, Sep 18, 2003
Filed:
Feb 6, 2003
Appl. No.:
10/359927
Inventors:
David St. Clair - Houston TX, US
Dale Handlin - Houston TX, US
Carl Willis - Houston TX, US
Dale Handlin - Houston TX, US
Carl Willis - Houston TX, US
International Classification:
C08L053/00
US Classification:
525/088000
Abstract:
The present invention relates to adhesives and sealants prepared from novel anionic block copolymers of mono alkenyl arenes and conjugated dienes, and to blends of such block copolymers with other polymers. The block copolymers are selectively hydrogenated and have mono alkenyl arene end blocks and controlled distribution blocks of mono alkenyl arenes and conjugated dienes. The block copolymer may be combined with tackifying resins, oils and other components to form the adhesives and sealants of the present invention.
Gels From High Molecular Weight Block Copolymers
US Patent:
2005027, Dec 8, 2005
Filed:
Jun 3, 2004
Appl. No.:
10/860191
Inventors:
David Clair - Houston TX, US
Willem Vonk - Amsterdam, NL
Cornelis Dijk - Amsterdam, NL
Willem Vonk - Amsterdam, NL
Cornelis Dijk - Amsterdam, NL
International Classification:
C08K005/01
US Classification:
524474000
Abstract:
The present invention relates to gels prepared from novel anionic block copolymers of aromatic vinyl compounds and conjugated dienes. The block copolymers include a high molecular weight linear and/or radial block copolymer component (SBC1 and/or SBC2), and a diblock component (E1). The block copolymer may be combined with tackifying resins, oils and other components to form the gels of the present invention.
Gels From Silane-Coupled Block Copolymers
US Patent:
2003022, Dec 4, 2003
Filed:
Jun 4, 2003
Appl. No.:
10/453998
Inventors:
Dale Handlin - Houston TX, US
Carl Willis - Houston TX, US
David St. Clair - Houston TX, US
Carl Willis - Houston TX, US
David St. Clair - Houston TX, US
International Classification:
C08L053/00
US Classification:
525/089000
Abstract:
The present invention relates to gels prepared from novel anionic block copolymers of mono alkenyl arenes and conjugated dienes, and to blends of such block copolymers with other polymers. The block copolymers are selectively hydrogenated and have mono alkenyl arene end blocks and conjugated diene mid blocks. The block copolymer may be combined with tackifying resins, oils and other components to form the gels of the present invention.
Oil Gels Of Controlled Distribution Block Copolymers And Ester Oils
US Patent:
2006020, Sep 14, 2006
Filed:
Mar 7, 2006
Appl. No.:
11/369563
Inventors:
David St. Clair - Houston TX, US
International Classification:
C08K 5/10
US Classification:
524286000, 524571000
Abstract:
The present invention relates to oil gel compositions that include at least one non-aromatic ester oil and an anionic block copolymer of a mono alkenyl arene and a conjugated diene. The block copolymer is selectively hydrogenated and has mono alkenyl arene end blocks and a controlled distribution block of a mono alkenyl arene and a conjugated diene midblock. The ester oil is a non-aromatic, ester compound such as soybean oil, rapeseed oil, and other like compounds.
Oil Gels Of Controlled Distribution Block Copolymers And Ester Oils
US Patent:
2006020, Sep 14, 2006
Filed:
Mar 11, 2005
Appl. No.:
11/077670
Inventors:
David St. Clair - Houston TX, US
International Classification:
C08F 10/00
US Classification:
526284000, 525063000, 524571000
Abstract:
The present invention relates to oil gel compositions that include at least one non-aromatic ester oil and an anionic block copolymer of a mono alkenyl arene and a conjugated diene. The block copolymer is selectively hydrogenated and has mono alkenyl arene end blocks and a controlled distribution block of a mono alkenyl arene and a conjugated diene midblock. The ester oil is a non-aromatic, ester compound such as soybean oil, coconut oil, and other like compounds.
Gels From Controlled Distribution Block Copolymers
US Patent:
2004013, Jul 15, 2004
Filed:
Dec 22, 2003
Appl. No.:
10/745352
Inventors:
David St. Clair - Houston TX, US
Dale Handlin - Houston TX, US
Carl Willis - Houston TX, US
Dale Handlin - Houston TX, US
Carl Willis - Houston TX, US
International Classification:
C08L053/00
US Classification:
524/505000, 525/098000
Abstract:
The present invention relates to gels prepared from novel anionic block copolymers of mono alkenyl arenes and conjugated dienes, and to blends of such block copolymers with other polymers. The block copolymers are selectively hydrogenated and have mono alkenyl arene end blocks and controlled distribution blocks of mono alkenyl arenes and conjugated dienes. The block copolymer may be combined with tackifying resins, oils and other components to form the gels of the present invention.
Solvent Based, Elastomeric Coatings With Lower Voc
US Patent:
2005011, Jun 2, 2005
Filed:
Dec 1, 2003
Appl. No.:
10/724656
Inventors:
David St. Clair - Houston TX, US
International Classification:
C08L053/00
US Classification:
524736000, 525088000, 524849000, 524847000
Abstract:
The present invention relates to solvent based coatings which have a low level of volatile organics compounds (VOC) meeting California VOC regulations and which can be spray applied as a coating on a variety of surfaces. The coating formulation comprises a hydrogenated styrene/butadiene triblock copolymer, a hydrogenated styrene/butadiene diblock copolymer, at least one hydrocarbon solvent, at least one VOC exempt solvent, a midblock tackifying resin, and a pigment or filler. The relative amounts of solvent, tackifying resin and pigment are adjusted to obtain a solvent based, elastomeric coating having a VOC content of no more than 250 grams per liter and a viscosity no higher than 2,000 centipoise @ 25° C. as measured according to ASTM D2196.