Henry T Beck

US Patent:

40769100, Feb 28, 1978

Filed:

Mar 21, 1974

Appl. No.:

5/453465

Inventors:

Henry Nelson Beck - Walnut Creek CA

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C08K 534

US Classification:

526 6

Abstract:

Isotactic polystyrene is heat fabricated in admixture with minor proportions of melamine, thymine, 2-hydroxybenzimidazole, oxamide and numerous other compounds to provide improved crystallization rates.

US Patent:

50719173, Dec 10, 1991

Filed:

Aug 20, 1990

Appl. No.:

7/569492

Inventors:

David R. Pederson - Clayton CA
Peter E. Pierini - Berkeley CA
Henry N. Beck - Walnut Creek CA
Mark J. Semer - Fairfield CA

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

D01F 656

US Classification:

525241

Abstract:

The invention is a crystalline fiber comprising syndiotactic polystyrene, or a mixture. Preferably the fiber is a high strength fiber isotactic polystyrene and syndiotactic polystyrene wherein the fiber is monoaxially oriented, has a tensile strength of about 10,000 psi or greater, and a modulus of about 1,000,000 psi or greater. In another aspect the invention is a process for the preparation of fibers of syndiotactic polystyrene, or a mixture of isotactic polystyrene and syndiotactic polystyrene which comprises: A. contacting syndiotactic polystyrene, or a mixture of isotactic polystyrene and syndiotactic polystyrene with a solvent for the polystyrene at elevated temperatures under conditions such that a homogenous solution is formed which has sufficient viscosity to be extruded; B. extruding the solution through an orifice to form a fiber at elevated temperatures; C. quenching the fiber by passing the fiber through one or more zones under conditions such that the fiber solidifies; D.

US Patent:

48973076, Jan 30, 1990

Filed:

Aug 11, 1987

Appl. No.:

7/084444

Inventors:

Henry N. Beck - Walnut Creek CA
Robert M. Nowak - Midland MI

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C08J 702
B01D 3916
B05D 500
B32B 702
C08F 600

US Classification:

428398

Abstract:

The present invention relates to a process for the solvent-induced crystallization of amorphous poly(etheretherketone)-type polymer to produce an article, which process comprises: A. contacting a preformed article of a polymer comprising amorphous poly(etheretherketone)-type polymer with at least one organic compound in its liquid state which consists essentially of atoms of carbon and hydrogen, optionally with oxygen, nitrogen, sulfur, halogen or mixtures thereof having a molecular weight of between about 160 and 320 daltons at a temperature of between about 85. degree. C. and 145. degree. C. for a time effective to crystallize the poly(etheretherketone)-type polymer, B. removing the organic compound, and C. recovering the article comprising crystallized poly(etheretherketone)-type polymer.

US Patent:

49621319, Oct 9, 1990

Filed:

Nov 6, 1987

Appl. No.:

7/118141

Inventors:

Henry N. Beck - Walnut Creek CA
Edgar S. Sanders - Pittsburg CA
G. Glenn Lipscomb - Walnut Creek CA

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C08L 6900

US Classification:

521 51

Abstract:

The invention is a composition useful for the preparation of POWADIR membranes of a bisphenol-based polycarbonate wherein at least 25 percent by weight of the bisphenol moieties are tetrahalogenated, wherein the halogen is Cl or Br, the composition comprising (i) a bisphenol-based polycarbonate wherein at least 25 percent by weight of the bisphenol moieties are tetrahalogenated, wherein the halogen is Cl or Br, (ii) a solvent for such polycarbonate, and (iii) a non-solvent for such polycarbonate. The composition is useful for extruding membranes wherein the membranes formed are POWADIR membranes with a discriminating region capable of separating oxygen from nitrogen. The composition of this invention allows the formation of membranes with excellent physical properties, good separation factors for oxygen and nitrogen, with excellent fluxes.

US Patent:

49275356, May 22, 1990

Filed:

Jul 14, 1989

Appl. No.:

7/380845

Inventors:

Henry N. Beck - Walnut Creek CA
Robert D. Mahoney - Danville CA

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

B01D 1301

US Classification:

21050023

Abstract:

This invention relates to novel semi-permeable isotropic or anisotropic microporous membranes fabricated from a mixture of isotactic polystyrene and syndiotactic polystyrene and a method of producing such membranes.

US Patent:

50431129, Aug 27, 1991

Filed:

Mar 28, 1989

Appl. No.:

7/329666

Inventors:

Henry N. Beck - Walnut creek CA

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

D01D 5247

US Classification:

264 41

Abstract:

The present invention pertains to a process for the production of an article comprising a polymer itself comprising poly(phenylene sulfide), which process comprises: A. contacting poly(phenylene sulfide) with at least one organic compound, consisting essentially of carbon and hydrogen, and optionally oxygen, nitrogen, sulfur, halogen, or mixtures thereof, having a molecular weight of between about 110 and 450 daltons and having at least one six membered aromatic ring structure, which compound is stable at a temperature of between 160. degree. and 400. degree. C. at ambient pressure, at a temperature of between about 160. degree. and 400. degree. C. at ambient pressure for a time effective to dissolve greater than 10 percent by weight of the poly(phenylene sulfide) present, with the proviso that when oxygen is present, the organic compound is not diphenyl oxide or substituted diphenyl oxide; B. forming the solution of poly(phenylene sulfide) and solvent of Step (A) into a desired article configuration; C. removing the solvent; and D.

US Patent:

50645803, Nov 12, 1991

Filed:

Jul 14, 1989

Appl. No.:

7/380058

Inventors:

Henry N. Beck - Walnut Creek CA
Richard A. Lundgard - Antioch CA
Robert D. Mahoney - Danville CA

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

B29C 6720

US Classification:

264 28

Abstract:

A method of preparing a microporous membrane from unsulfonated poly(etheretherketone)-type polymers.

US Patent:

49801015, Dec 25, 1990

Filed:

Jul 14, 1989

Appl. No.:

7/381432

Inventors:

Henry N. Beck - Walnut Creek CA
Robert D. Mahoney - Danville CA
Hawk S. Wan - Antioch CA
Richard A. Lundgard - Antioch CA

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

B01D 1300
B29C 6500

US Classification:

264 41

Abstract:

This invention relates to semi-permeable anisotropic syndiotatic polystyrene microporous membranes and a process for preparing such membranes.