Walter W Schmiegel

6359089, Mar 19, 2002

Mar 22, 2001

09/815137

Ming-Hong Hung - Wilmington DE
Walter Werner Schmiegel - Wilmington DE

DuPont Dow Elastomers, L.L.C. - Wilmington DE

C08L 2712

526247, 525384, 526250, 526253, 526254, 526255, 568615

Disclosed herein is a novel class of fluorovinyl ether monomers which are useful as cure site monomers in fluoroelastomers, a process for the preparation of these fluorovinyl ether monomers, and fluoroelastomer copolymer compositions that contain copolymerized units of these fluorovinyl ether monomers.

6429271, Aug 6, 2002

Sep 20, 2001

09/956681

Walter Werner Schmiegel - Wilmington DE

DuPont Dow Elastomers, L.L.C. - Wilmington DE

C08F11418

526255, 525248, 525250, 525264, 526247, 526253

Copolymers having copolymerized units of vinylidene fluoride, perfluoro(alkyl vinyl) ether, 2-hydropentafluoropropene, and, optionally, tetrafluoroethylene, exhibit excellent low temperature properties and processability when cured with polyhydroxy compounds or amines.

6437066, Aug 20, 2002

Oct 9, 2001

09/974118

Ming-Hong Hung - Wilmington DE
Walter W Schmiegel - Wilmington DE

DuPont Dow Elastomers, L.L.C. - Wilmington DE

C08F21418

526247, 526250, 526253, 526254, 526255, 5263488

Disclosed herein is a novel class of fluorovinyl ether monomers which are useful as cure site monomers in fluoroelastomers, a process for the preparation of these fluorovinyl ether monomers, and fluoroelastomer copolymer compositions that contain copolymerized units of these fluorovinyl ether monomers.

6610790, Aug 26, 2003

Mar 22, 2001

09/815067

Ming-Hong Hung - Wilmington DE
Walter Werner Schmiegel - Wilmington DE

Dupont Dow Elastomers L.L.C. - Wilmington DE

C08F 800

5253263, 525372, 525384, 524430

Fluoroelastomers which contain copolymerized units of a fluoroolefin cure site monomer of the general formula: wherein R is a C -C perfluoroalkyl group or a C -C perfluoroalkoxy group and n is an integer from 1-3, exhibit excellent physical properties and processability when cured with polyhydroxy compounds.

6638999, Oct 28, 2003

Feb 6, 2001

09/777372

Christopher John Bish - Kennett Square PA
Peter Arnold Morken - Wilmington DE
Walter Werner Schmiegel - Wilmington DE

DuPont Dow Elastomers LLC. - Wilmington DE

C08K 517

524195, 524236, 524238, 524241, 524251

Perfluoroelastomer compositions comprising perfluoroelastomers having copolymerized units of tetrafluoroethylene, a perfluoro(vinyl ether), and a nitrile-containing cure site monomer are cured with certain nitrogen-containing nucleophilic compounds. The nucleophilic compounds also act as dual curatives in perfluoroelastomer compositions which incorporate other curing agents.

6664339, Dec 16, 2003

May 2, 2002

10/138069

Walter Werner Schmiegel - Wilmington DE
Phan Linh Tang - West Chester PA

DuPont Dow Elastomers LLC - Wilmington DE

C08L 2712

5253264, 5253263, 5253593, 525368, 525384

A base resistant, substantially amorphous fluoroelastomer comprising (1) 10-40 mole percent ethylene units, (2) 32-60 mole percent tetrafluoroethylene units, (3) 20-40 mole percent perfluoro ether units selected from the group consisting of perfluoro(alkyl vinyl ethers), perfluoro(alkyl alkenyl ethers) and perfluoro(alkoxy alkenyl ethers), and (4) 0. 1 to 15 mole percent of a cure site monomer selected from the group consisting of i) 3,3,3-trifluoropropene-1, ii) trifluoroethylene, iii) 1,2,3,3,3-pentafluoropropylene, iv) 1,1,3,3,3-pentafluoropropylene, and v) 2,3,3,3-tetrafluoropropene. Such fluoroelastomers may be vulcanized with polyhydroxy curatives. The resulting vulcanized fluoroelastomer compositions are resistant to attack by amines, strong bases and hydrogen sulfide and possess a combination of good low temperature and high temperature properties and they are resistant to oil swell.

6703450, Mar 9, 2004

May 2, 2002

10/137914

John Gordon Bauerle - Wilmington DE
Walter Werner Schmiegel - Wilmington DE

DuPont Dow Elastomer, L.L.C. - Wilmington DE

C08F21426

5253263, 5253264, 5253593, 525340, 525343, 525345, 525366, 525374, 525386, 525281

Compositions of specialty fluoroelastomers containing copolymerized units of tetrafluoroethylene, propylene, optionally vinylidene fluoride, and a cure site monomer selected from the group consisting of i) trifluoroethylene, ii) 3,3,3-trifluoropropene-1, iii) 1,2,3,3,3-pentafluoropropylene, iv) 1,1,3,3,3-pentafluoropropylene, and v) 2,3,3,3-tetrafluoropropene are readily curable with polyhydroxy curing systems. The resulting cured articles have a combination of excellent resistance to alkaline fluids, superior tensile properties and compression set resistance.

6887959, May 3, 2005

Sep 24, 2003

10/670086

Walter Werner Schmiegel - Wilmington DE, US
Phan Linh Tang - West Chester PA, US

DuPont Dow Elastomers LLC - Wilmington DE

C08F130/02

526247, 5253263, 5253264

A base resistant, substantially amorphous fluoroelastomer comprising (1) 10-40 mole percent ethylene units, (2) 32-60 mole percent tetrafluoroethylene units, (3) 20-40 mole percent perfluoro ether units selected from the group consisting of perfluoro(alkyl vinyl ethers), perfluoro(alkyl alkenyl ethers) and perfluoro(alkoxy alkenyl ethers), and (4) 0. 1 to 15 mole percent of a cure site monomer selected from the group consisting of i) 3,3,3-trifluoropropene-1, ii) trifluoroethylene, iii) 1,2,3,3,3-pentafluoropropylene, iv) 1,1,3,3,3-pentafluoropropylene, and v) 2,3,3,3-tetrafluoropropene. Such fluoroelastomers may be vulcanized with polyhydroxy curatives. The resulting vulcanized fluoroelastomer compositions are resistant to attack by amines, strong bases and hydrogen sulfide and possess a combination of good low temperature and high temperature properties and they are resistant to oil swell.