John H Krajewski

US Patent:

49992163, Mar 12, 1991

Filed:

Aug 21, 1989

Appl. No.:

7/396853

Inventors:

Joseph Gaske - Mt. Prospect IL
John J. Krajewski - Wheeling IL
Gerry K. Noren - Hoffman Estates IL

Assignee:

DeSoto, Inc. - Des Plaines IL

International Classification:

B05D 306

US Classification:

427 44

Abstract:

A method of coating a concrete floor is disclosed in which the concrete surface is coated with a homogeneous liquid coating composition containing maleate or fumarate unsaturation in combination with vinyl ether unsaturation and a ketonic photoinitiator, the wet coating is allowed to seep into the concrete surface and to flow out on the concrete surface to form a smooth coating, and this coating is cured by exposing it at light having a wavelength in the range of from about 200 to about 600 nanometers.

US Patent:

49962825, Feb 26, 1991

Filed:

Sep 8, 1989

Appl. No.:

7/404652

Inventors:

Gerry K. Noren - Hoffman Estates IL
John J. Krajewski - Wheeling IL
Edward J. Murphy - Mt. Prospect IL

Assignee:

DeSoto, Inc. - Des Plaines IL

International Classification:

C08G 1804

US Classification:

528 75

Abstract:

A cationically curable polyurethane composition comprises the reaction product of an organic polyisocyanate with a transvinylation polyhydric alcohol mixture containing hydroxy groups. The polyisocyanate consumes substantially all of the available hydroxy groups in the transvinylation polyhydric alcohol mixture. These compositions are particularly useful in stereolithography. A method of transvinylation utilizing ultrasonic energy is also disclosed.

US Patent:

53344561, Aug 2, 1994

Filed:

May 26, 1992

Appl. No.:

7/888919

Inventors:

Gerry K. Noren - Hoffman Estates IL
John J. Krajewski - Wheeling IL
Sami A. Shama - Hoffman Estates IL
John M. Zimmerman - Hoffman Estates IL
Danny C. Thompson - Schaumburg IL
John T. Vandeberg - Barrington IL

Assignee:

Stamicarbon B.V. - Galeen

International Classification:

B32B 2706
B32B 2736
C08F 250
C08F 1632

US Classification:

428431

Abstract:

A free-radical radiation curable composition comprising: a) at least one compound containing from one to about six vinyl ether groups; and b) at least one compound containing a saturated backbone and at least one maleate or fumarate end group per molecule, wherein the ratio of vinyl ether groups to maleate or fumarate groups in the composition is in the range of about 5:1 to about 1:5.

US Patent:

48441449, Jul 4, 1989

Filed:

Aug 8, 1988

Appl. No.:

7/229476

Inventors:

Edward J. Murphy - Des Plaines IL
Robert E. Ansel - Hoffman Estates IL
John J. Krajewski - Wheeling IL

Assignee:

DeSoto, Inc. - Des Plaines IL

International Classification:

B22C 902

US Classification:

164 35

Abstract:

A method of investment casting utilizes a pattern produced by stereolithography in which a three-dimensional specimen is provided by light cure of ethylenically unsaturated liquid material. The stereolithography composition is constituted by the ethylenically unsaturated liquid material in admixture with an inert low thermoplastic material which weakens the pattern when heated within the mold used in the investment casting process to prevent the thermal expansion of the pattern from cracking the mold.

US Patent:

49420011, Jul 17, 1990

Filed:

Oct 31, 1989

Appl. No.:

7/429568

Inventors:

Edward J. Murphy - Des Plaines IL
Robert E. Ansel - Hoffman Estates IL
John J. Krajewski - Wheeling IL

International Classification:

B29C 3508
C08F 432
C08F 2610
C08F12018

US Classification:

264 22

Abstract:

A stereolithographic method which employs an ultraviolet-curable liquid composition adapted to cure rapidly to a lightly cross-linked solvent-swellable three-dimensional complexly-shaped polymeric thin-walled element constituted by heat-softenable solid polymer upon exposure to ultraviolet dosage in the range of about 0. 1 to about 10 Joules per square centimeter and which possesses reduced distortion comprises, from 20 to 80 weight percent, of a resinous polyacrylate or polymethacrylate dissolved in a combination of 10 to 45 weight percent of a liquid polyacrylate or polymethacrylate, which is preferably trifunctional, and 10 to 45 weight percent of liquid N-vinyl monomer, preferably N-vinyl pyrrolidone. Thus, the weight ratio of polyacrylate: polymethacrylate: N-vinyl monomer is about 1:2:2 to about 8:1:1. One of the foregoing polyacrylates or polymethacrylates is a polyacrylate and the other is a polymethacrylate so that good cure speed is accompanied by good distortion resistance.

US Patent:

46084096, Aug 26, 1986

Filed:

May 8, 1985

Appl. No.:

6/731888

Inventors:

Clive J. Coady - Hanover Park IL
John J. Krajewski - Wheeling IL
Timothy E. Bishop - Algonquin IL

Assignee:

DeSoto, Inc. - Des Plaines IL

International Classification:

C08L 7504

US Classification:

524199

Abstract:

An ultraviolet curing liquid coating composition is disclosed which, when cured with ultraviolet light in the presence of an appropriate photoinitiator, provides buffer coatings for optical glass fiber having adequate strength at room or expected elevated temperature and stability at such elevated temperature, a high index of refraction above 1. 48, and a low tensile modulus which remains low to resist microbending difficulties down to around -60. degree. C. This coating composition consists essentially of a linear polyacrylate-terminated polyurethane or polyurea oligomer having a room temperature tensile modulus of at least 100 psi. , and a tensile modulus at -60. degree. C. which is less than 175,000 psi. , when capped with 2-hydroxyethyl acrylate and cured with ultraviolet light, in admixture with a liquid acrylate-functional material which does not increase the low temperature hardness and which provides the liquidity needed for coating application. The oligomer is instead capped with a monohydric polyacrylate to provide improved cure speed without eliminating resistance to low temperature microbending.

US Patent:

49720066, Nov 20, 1990

Filed:

Sep 8, 1988

Appl. No.:

7/241881

Inventors:

Edward J. Murphy - Des Plaines IL
John J. Krajewski - Wheeling IL
Robert E. Ansel - Hoffman Estates IL

Assignee:

DeSoto, Inc. - Des Plaines IL

International Classification:

C08F 440
B05D 306

US Classification:

522121

Abstract:

A method of curing a three-dimensional specimen of preformed cross-linked polymeric material containing polymerizable ethylenically-unsaturated material is provided in which the specimen is immersed in water having dissolved therein an amount of a water-soluble organic free-radical polymerization catalyst effective to transfer a polymerization-initiating amount of the catalyst into the preformed cross-linked polymeric material. This specimen containing the water-soluble organic free-radical polymerization catalyst is heated to a temperature causing polymerization, and is maintained at that temperature while the cure is completed. The aqueous bath preferably contains a catalyst mixture which includes a catalyst of oxidizing character in admixture with a reducing agent, such as an amine, and is maintained at a polymerization temperature of from 60. degree. C. to 100. degree. C. so that immersion of the specimen in a single bath completes the cure.

US Patent:

53344553, Aug 2, 1994

Filed:

May 26, 1992

Appl. No.:

7/888888

Inventors:

Gerry K. Noren - Hoffman Estates IL
John J. Krajewski - Wheeling IL
Sami A. Shama - Hoffman Estates IL
John M. Zimmerman - Hoffman Estates IL
Danny C. Thompson - Schaumburg IL
John T. Vandeberg - Barrington IL

Assignee:

Stamicarbon B.V. - Galeen

International Classification:

B32B 2738
C08F 250
C08F 1632
C08F 2210

US Classification:

428413

Abstract:

A free-radical radiation curable composition comprising: a) at least one compound containing from one to about six vinyl ether groups; and b) at least one product obtainable by the reaction of a half-ester of maleic and/or fumaric acid with an epoxy functionalized compound, wherein the ratio of vinyl ether groups to maleate and/or fumarate groups is in the range of about 5:1 to about 1:5.