Raj B Shah

US Patent:

45187460, May 21, 1985

Filed:

Mar 15, 1984

Appl. No.:

6/589728

Inventors:

Kazys Sekmakas - Palatine IL
Raj Shah - Schaumburg IL
Ronald J. Lewarchik - Arlington Heights IL
Kevin P. Murray - Homewood IL

Assignee:

DeSoto, Inc. - Des Plaines IL

International Classification:

C08L 6128

US Classification:

525443

Abstract:

An essentially linear polyester oligomer having hydroxyl and carboxyl terminal groups for subsequent cure and its production are disclosed. This polyester oligomer is produced by first adducting approximately equimolar amounts of diol carrying two primary hydroxyl groups and a dicarboxylic acid anhydride to form an hydroxy acid. The carboxyl groups of this hydroxy acid are then esterified by reaction with an approximately stoichiometric proportion of diol carrying one primary hydroxyl group and one secondary hydroxyl group, the stoichiometry being based on the total hydroxyl content of the diol and the carboxyl content of the hydroxy acid, to form an hydroxyl-terminated oligomer. This hydroxyl-terminated oligomer is then adducted with a polycarboxylic acid monoanhydride having a carboxyl functionality of at least 3, this monoanhydride being used in an amount of 0. 01 to 0. 15 equivalents of anhydride per hydroxyl equivalent in the hydroxyl-terminated oligomer. The resulting polyester oligomer is essentially linear and possesses low solution viscosity at high resin solids content combined with high reactivity enabling low temperature cure with aminoplast resins.

US Patent:

42476593, Jan 27, 1981

Filed:

Mar 9, 1979

Appl. No.:

6/018887

Inventors:

Kazys Sekmakas - Palatine IL
Raj Shah - Schaumburg IL

Assignee:

DeSoto, Inc. - Des Plaines IL

International Classification:

C08L 6700

US Classification:

525 43

Abstract:

Water soluble epoxy ester copolymers adapted for sanitary can use comprise an hydroxy functional epoxy ester of a polyepoxide having an average molecular weight of about 300 to about 1100 and a 1,2-epoxy equivalency of about 1. 4 to about 2. 0, esterified with an at least approximately stoichiometric proportion, based on epoxide functionality, of monocarboxylic acid selected from benzoic acid, C. sub. 1 -C. sub. 8 alkyl substituted benzoic acid, and C. sub. 6 -C. sub. 10 alkanoic acid, the esterification reaction being continued to provide an acid number of less than 20, this hydroxy functional epoxy ester is polyesterified with from 1. 5-8%, based on the weight of the epoxy ester, of a monoethylenically unsaturated dicarboxylic acid which resists homopolymerization to an acid number of less than 20, and the polyester so obtained is copolymerized with from 15% to 70% of monoethylenic monomers, based on the copolymer, these monoethylenic monomers including carboxyl functional monomer providing an acid number of from 20-100 in the copolymer. The copolymers are dispersed in water by salt formation with an amine and aminoplast or phenoplast resin is incorporated to provide curing reactivity.

US Patent:

42172616, Aug 12, 1980

Filed:

Jan 8, 1979

Appl. No.:

6/001749

Inventors:

Kazys Sekmakas - Chicago IL
Raj Shah - Schaumburg IL
John D. DeRossi - Zion IL

Assignee:

DeSoto, Inc. - Des Plaines IL

International Classification:

C08J 306
C08L 3302

US Classification:

260 296NR

Abstract:

Thermosetting aqueous epoxy-acrylic copolymer coating systems adapted to cure on air drying are provided using a first package constituted by acid-neutralized organic solvent soluble tertiary amine copolymer comprising at least about 60% of non-reactive monoethylenic monomer, and from 15-40% of monoethylenic tertiary amine monomer, said copolymer being in solution in a watermiscible organic solvent, and a second component comprising a resinous polyepoxide in solution in at least partially water-miscible organic solvent.

US Patent:

41951476, Mar 25, 1980

Filed:

Feb 22, 1979

Appl. No.:

6/014101

Inventors:

Kazys Sekmakas - Palatine IL
Raj Shah - Schaumburg IL

Assignee:

DeSoto, Inc. - Des Plaines IL

International Classification:

C08F 206
C08F22058

US Classification:

526312

Abstract:

The preparation of water dispersible amine-functional copolymers is disclosed in which a mixture of ethylenically unsaturated material including amine-functional monomer is slowly added to a heated heel of water miscible organic solvent containing a solubilizing acid in an amount to neutralize from 25% to 90% of the amine functionality in the copolymer, but insufficient to provide a pH below 5 when the copolymer is dispersed in aqueous medium.

US Patent:

42947375, Oct 13, 1981

Filed:

May 27, 1980

Appl. No.:

6/153429

Inventors:

Kazys Sekmakas - Palatine IL
Raj Shah - Schaumburg IL

Assignee:

DeSoto, Inc. - Des Plaines IL

International Classification:

C08L 3502

US Classification:

260 292EP

Abstract:

Epoxy ester copolymer dispersible in water with the aid of an amine, which may be ammonia, is provided by esterifying a polyepoxide having a 1,2-epoxy equivalency in excess of 1. 0 and a molecular weight of from 350 to 8000 with at least 0. 5% of the weight of the copolymer of a monoester of a saturated monohydric alcohol with a monoethylenically unsaturated dicarboxylic acid which resists homopolymerization. This polyepoxide ester is copolymerized with from 15% to 70% of monoethylenic monomers, based on the weight of the copolymer, these monoethylenic monomers including carboxyl functional monomer providing an acid number of from 20-150 in the copolymer.

US Patent:

44979460, Feb 5, 1985

Filed:

Apr 13, 1983

Appl. No.:

6/484509

Inventors:

Kazys Sekmakas - Palatine IL
Raj Shah - Schaumburg IL

Assignee:

DeSoto, Inc. - Des Plaines IL

International Classification:

C08G 5900
C08G 6528

US Classification:

528 99

Abstract:

Epoxy phosphate-carboxyl copolymers substantially free of epoxy functionality and aqueous coatings containing the same are disclosed. These copolymers are formed by copolymerizing monoethylenically unsaturated monomers, including carboxyl-functional monomer, in an organic solvent solution containing an epoxy-functional epoxy phosphate, there being at least 5% of carboxyl-functional monomer and at least 10% of total monomers present in the copolymer. The copolymer is converted into a water soluble salt with volatile amine and phenoplast resins are preferably used to provide at least part of the curing agent.

US Patent:

43211763, Mar 23, 1982

Filed:

Jan 10, 1980

Appl. No.:

6/111076

Inventors:

Kazys Sekmakas - Palatine IL
Raj Shah - Schaumburg IL

Assignee:

DeSoto, Inc. - Des Plaines IL

International Classification:

C08F 226

US Classification:

524555

Abstract:

A method of forming a latex coating composition is disclosed in which there is first formed an aqueous emulsion of liquid droplets of water-insoluble polyol, such as a propylene oxide adduct of bisphenol. A, with the aid of a surfactant, and monoethylenically unsaturated monomers to be copolymerized are incorporated in the polyol emulsion while conditions of elevated temperature and catalysis are maintained to cause polymerization of said monomers in association with said polyol. The polyol is used in an amount of about 1% to about 25%, based on the weight of the materials which are copolymerized, and the monomers desirably include from about 0. 5% to about 10% on the same basis of a reactive monomer, such as isobutoxymethyl acrylamide.

US Patent:

47390042, Apr 19, 1988

Filed:

Dec 8, 1986

Appl. No.:

6/938861

Inventors:

Kazys Sekmakas - Des Plaines IL
Raj Shah - Schaumburg IL

Assignee:

DeSoto, Inc. - Des Plaines IL

International Classification:

C08F 216

US Classification:

524458

Abstract:

Cross-linked dispersion copolymers are disclosed which are produced by the aqueous emulsion copolymerization of from 15% to 80% of vinyl acetate, and from 5% to 70% of polyethylenically unsaturated cross-linking agent, like hexane diol diacrylate, from 1% to 40% of other copolymerizable monoethylenically unsaturated monomer being desirably present, preferably from 5% to 25% of a reactive monomer which is desirably hydroxyl-functional. The dispersion copolymers are suspended in active organic solvents which extensively swell the copolymer particles. These suspensions are useful in thermosetting solution coating compositions where they provide improved thermal sag resistance.