Willis T Schwartz

age ~88

from Grand Island, NY

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Willis Schwartz Phones & Addresses

Fire Retardant Unsaturated Polyesters
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US Patent:

40138151, Mar 22, 1977
Filed:

Dec 18, 1975
Appl. No.:

5/642026
Inventors:

Edwin Dorfman - Grand Island NY
Willis T. Schwartz - Grand Island NY
Raymond R. Hindersinn - Lewiston NY
Assignee:

Hooker Chemicals & Plastics Corporation - Niagara Falls NY
International Classification:

C08L 6706
US Classification:

428285
Abstract:

Highly fire retardant unsaturated polyester resins which exhibit low burning rates, low smoke generation and beneficial char formation in the presence of a flame are provided by incorporating up to about 5 weight percent of iron or an iron compound in a halogen containing unsaturated polyester of a polycarboxylic compound and a polyhydric alcohol having greater than about 4 weight percent halogen based on the weight of unsaturated polyester resin and a copolymerizable unsaturated monomer. The unsaturated polyester resins are copolymerized with an unsaturated monomer for use in castings, laminated products and other reinforced articles.

Process For The Preparation Of Diether Diphthalic Anhydrides
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US Patent:

48683167, Sep 19, 1989
Filed:

Apr 27, 1987
Appl. No.:

7/042760
Inventors:

Willis T. Schwartz - Grand Island NY
Assignee:

Occidental Chemical Corporation - Niagara Falls NY
International Classification:

C07D30789
US Classification:

549241
Abstract:

Diether diphthalic anhydrides are prepared by reacting fluorophthalic anhydride with an aromatic dihydroxyl compound in the presence of potassium fluoride and a polar, aprotic solvent.

Low Profile Additives In Polyester Systems
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US Patent:

40383423, Jul 26, 1977
Filed:

Mar 11, 1976
Appl. No.:

5/665752
Inventors:

Willis T. Schwartz - Grand Island NY
Assignee:

Hooker Chemicals & Plastics Corporation - Niagara Falls NY
International Classification:

C08L 6706
US Classification:

260862
Abstract:

Polymerizable polyester compositions are provided containing a styrene-maleic anhydride copolymer reacted with a hydroxyl terminated saturated polyester. Such compositions have good thickening response and are free from tackiness in the uncured state, and upon curing have good shrinkage control and improved surface smoothness. The compositions are useful as bulk molding compounds or sheet molding compounds.

Process For The Preparation Of Oxy-Diphthalic Anhydrides
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US Patent:

48374040, Jun 6, 1989
Filed:

Aug 24, 1987
Appl. No.:

7/088325
Inventors:

Willis T. Schwartz - Grand Island NY
Assignee:

Occidental Chemical Corporation - Niagara Falls NY
International Classification:

C07D30789
US Classification:

549241
Abstract:

Oxy-diphthalic anhydrides are prepared by reacting a halophthalic anhydride with an hydroxyphthalic anhydride in a polar aprotic solvent and in the presence of an alkali metal compound such as KF, CsF or K. sub. 2 CO. sub. 3.

Process For The Preparation Of 4-Bromophthalic Anhydride
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US Patent:

49622064, Oct 9, 1990
Filed:

Nov 20, 1989
Appl. No.:

7/439299
Inventors:

Mary K. Cocoman - Grand Island NY
Willis T. Schwartz - Grand Island NY
Assignee:

Occidental Chemical Corporation - Niagara Falls NY
International Classification:

C07D30777
US Classification:

549246
Abstract:

A process for the production of 4-bromophthalic anhydride which comprises the reaction of 4-chlorotetrahydrophthalic anhydride with elemental bromine, in the presence of a catalytically effective amount of iron or an iron salt is disclosed.

Phenoxy Phthalic Anhydrides
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US Patent:

49609050, Oct 2, 1990
Filed:

Dec 15, 1988
Appl. No.:

7/284639
Inventors:

Willis T. Schwartz - Grand Island NY
Assignee:

Occidental Chemical Corporation - Niagara Falls NY
International Classification:

C07D30789
US Classification:

549243
Abstract:

Phenoxy phthalic anhydrides are prepared by the reaction of a fluorophthalic anhydride with a phenol compound in the presence of potassium fluoride and a polar, aprotic solvent.

Polyimides And Copolyimides Based On Halo-Oxydiphthalic Anhydrides
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US Patent:

51010062, Mar 31, 1992
Filed:

Mar 25, 1991
Appl. No.:

7/674802
Inventors:

Jeffrey S. Stults - Grand Island NY
Willis T. Schwartz - Grand Island NY
Assignee:

Occidental Chemical Corporation - Niagara Falls NY
International Classification:

C08G 6300
C08G 6926
C08G 802
C07D30789
US Classification:

528188
Abstract:

Novel halogenated polyimides and co-polyimides comprise recurring imide structural units of the formula ##STR1## where X is F, Cl, Br or I; Y is H, F, Cl, Br or I; and R is a divalent organic radical.

Halo-Oxydiphthalic Anhydrides
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US Patent:

49436422, Jul 24, 1990
Filed:

May 15, 1989
Appl. No.:

7/352070
Inventors:

Jeffrey S. Stults - Grand Island NY
Willis T. Schwartz - Grand Island NY
Assignee:

Occidental Chemical Corporation - Niagara Falls NY
International Classification:

C07D30789
C07D31924
US Classification:

549241
Abstract:

Novel halo-oxydiphthalic anhydrides are of the formula ##STR1## where X is F, Cl, Br, or I; X' is H, F, Cl, Br, or I.