Frederick M Walker

US Patent:

56889054, Nov 18, 1997

Filed:

Sep 20, 1995

Appl. No.:

8/530813

Inventors:

Frederick Herbert Walker - Doylestown PA

Assignee:

Air Products and Chemicals, Inc. - Allentown PA

International Classification:

C08G 6934
C08L 6302
C08L 6304

US Classification:

528332

Abstract:

An amine hardener composition for curing epoxy resin based coatings and related products comprising (A) from 5 to 75% of a diamine which possesses a vapor pressure less than about 133 Pascals at 20. degree. C. , contains both a primary and a tertiary amine and corresponds to either of the structures: ##STR1## where R. sub. 1 and R. sub. 2 are independently C. sub. 1 -C. sub. 8 alkyl; X is --CH. sub. 2 --CH. sub. 2 --, --CH. sub. 2 --CH. sub. 2 --CH. sub. 2 --, or --CH. sub. 2 --O--CH. sub. 2 --; and n is 2-6, (B) from 5 to 95% of a polyamide, amidoamine, Mannich base or cycloaliphatic amine curing agent; and (C) from 0 to 50% of other active hydrogen containing dismines or polyamines. Coatings based on the composition can be formulated at up to 100% solids, and have an excellent combination of pot life and dry speed.

US Patent:

55764169, Nov 19, 1996

Filed:

Dec 13, 1994

Appl. No.:

8/355149

Inventors:

Frederick H. Walker - Doylestown PA

Assignee:

Air Products and Chemicals, Inc. - Allentown PA

International Classification:

C08G 6926

US Classification:

528340

Abstract:

A new epoxy hardener composition is the product of the reaction of (A) a poly(alkylene oxide) monoamine or diamine with a molecular weight (Mn) of about 500 to 3000 and (B) a di- or polycarboxylic acid, in a ratio of moles of carboxylic acid to equivalents of amine of about 1:1 to 6:1 to yield an intermediate (C), which in a second step is reacted with (D) a di- or polyamine. The compositions of the invention are excellent emulsifiers of liquid epoxy resins in aqueous media without the addition of added surfactants or acidic compounds, and can be used to prepare water resistant water-borne coatings and related products from both liquid and solid epoxy resins, that possess long pot lives and contain relatively small amounts of volatile organic compounds.

US Patent:

55998550, Feb 4, 1997

Filed:

Jun 5, 1995

Appl. No.:

8/463477

Inventors:

Frederick H. Walker - Doylestown PA

Assignee:

Air Products and Chemicals, Inc. - Allentown PA

International Classification:

C08K 320
C08L 6302
C08L 6304

US Classification:

523404

Abstract:

A new epoxy hardener composition is the product of the reaction of (A) a poly(alkylene oxide) monoamine or diamine with a molecular weight (Mn) of about 500 to 6000 and (B) a di- or polyepoxide, in a ratio of epoxide to active amine hydrogens of about 1. 1:1 to 6:1 to yield an intermediate (C), which in a second step is reacted with (D) a di- or polyamine, in a ratio of active amine hydrogens to epoxide of greater than about 25 to 1, preferably greater than about 30 to 1. The compositions of the invention are excellent emulsifiers of liquid epoxy resins in aqueous medium without the addition of added surfactants or acidic compounds, and can be used to prepare water resistant water-borne coatings and related products from both liquid and solid epoxy resins, that possess long pot lives and contain relatively small amounts of volatile organic compounds.

US Patent:

54896304, Feb 6, 1996

Filed:

Nov 28, 1994

Appl. No.:

8/345164

Inventors:

Frederick H. Walker - Doylestown PA

Assignee:

Air Products and Chemicals, Inc. - Allentown PA

International Classification:

C08K 320
C08L 6302
C08L 6304

US Classification:

523404

Abstract:

A new epoxy hardener composition is the product of the reaction of (A) a poly(alkylene oxide) monoamine or diamine with a molecular weight (Mn) of about 500 to 3000 and (B) a di- or polyepoxide, in a ratio of epoxide to active amine hydrogens of about 1. 1:1 to 6:1 to yield an intermediate (C), which in a second step is reacted with (D) a di- or polyamine, in a ratio of active amine hydrogens to epoxide of greater than about 25 to 1, preferably greater than about 30 to 1. The compositions of the invention are excellent emulsifiers of liquid epoxy resins in aqueous medium without the addition of added surfactants or acidic compounds, and can be used to prepare water resistant water-borne coatings and related products from both liquid and solid epoxy resins, that possess long pot lives and contain relatively small amounts of volatile organic compounds.

US Patent:

54911923, Feb 13, 1996

Filed:

Aug 28, 1991

Appl. No.:

7/754262

Inventors:

Frederick H. Walker - Hatfield PA
Chao-Jen Chung - Gwynedd PA
Andrew Mercurio - Gwynedd Valley PA

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

C08L 6708

US Classification:

525 74

Abstract:

A non-aqueous dispersion for modifying alkyd-containing coating formulations and a method for manufacturing the non-aqueous dispersion are provided. The non-aqueous dispersion contains from about 10 to about 60 parts by weight of a low molecular weight solution polymer, having a selected glass transition temperature greater than about -10. degree. C. , and from about 90 to about 40 parts by weight of a polymer which is insoluble in the non-aqueous medium, and where the soluble polymer is attached to or adsorbed onto the insoluble polymer particles. The non-aqueous dispersion is preferably prepared by dispersion polymerization to form the insoluble polymer in a non-aqueous medium in the presence of the soluble polymer.

US Patent:

55960308, Jan 21, 1997

Filed:

Oct 3, 1995

Appl. No.:

8/538671

Inventors:

Frederick H. Walker - Doylestown PA

Assignee:

Air Products and Chemicals, Inc. - Allentown PA

International Classification:

C08K 320
C08L 6302

US Classification:

523404

Abstract:

A new epoxy hardener composition is the product of the reaction of (A) a poly(alkylene oxide) monoamine or diamine with a molecular weight (Mn) of about 500 to 3000 and (B) a di- or polycarboxylic acid, in a ratio of moles of carboxylic acid to equivalents of amine of about 1:1 to 6:1 to yield an intermediate (C), which in a second step is reacted with (D) a di- or polyamine. The compositions of the invention are excellent emulsifiers of liquid epoxy resins in aqueous media without the addition of added surfactants or acidic compounds, and can be used to prepare water resistant water-borne coatings and related products from both liquid and solid epoxy resins, that possess long pot lives and contain relatively small amounts of volatile organic compounds.

US Patent:

55278396, Jun 18, 1996

Filed:

Dec 13, 1994

Appl. No.:

8/355150

Inventors:

Frederick H. Walker - Doylestown PA

Assignee:

Air Products and Chemicals, Inc. - Allentown PA

International Classification:

C08K 320
C08L 6302
C08L 6304

US Classification:

523404

Abstract:

A new epoxy hardener composition is the product of the reaction of (A) a poly(alkylene oxide) monoalcohol with a molecular weight (Mn) of about 500 to 3000 and (B) a polyepoxide, in a molar ratio of polyepoxide to poly(alkylene oxide) monoalcohol of about 1. 3:1 to 6:1 to yield an intermediate (C), which in a second step is reacted with (D) a polyamine. The compositions of the invention are excellent emulsifiers of liquid epoxy resins in aqueous media without the addition of added surfactants or acidic compounds, and can be used to prepare water resistant water-borne coatings and related products from both liquid and solid epoxy resins, that possess long pot lives and contain relatively small amounts of volatile organic compounds.