Michele L Cramer

US Patent:

6897259, May 24, 2005

Filed:

Sep 25, 2003

Appl. No.:

10/671276

Inventors:

Michele Le Cramer - Sinking Spring PA, US
Nancy Lee Osenbach - New Ringgold PA, US

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

C09D183/06
C09D005/03
C09D005/28

US Classification:

525100, 4284231, 4284258, 428447, 525101, 525446, 525474, 525476, 525479, 528 26, 528 28

Abstract:

The present invention provides a powder composition for forming a heat stable wrinkle finish coating and the wrinkle finish coatings formed there from. The composition of the present invention comprises a resin consisting essentially of one or more than one silicone resin having a condensable hydroxyl content of from 2% by weight to 7% by weight, a curing agent, preferably an aminoplast, and a wrinkle finish forming catalyst, preferably an amine salt of triflic acid. In another embodiment, the powder composition of the present invention may comprise a hydroxyl functional resin, preferably a polyester, mixed with the said silicone resin to aid in the adhesion of the coating to a substrate. The composition of the present invention may further comprise up to 60 phr of a filler, such as wollastonite, to aid in heat stability. The coatings of the sent invention provide outstanding heat stability at temperatures greater than 350 F. and up to 550 F.

US Patent:

20050065294, Mar 24, 2005

Filed:

Sep 13, 2004

Appl. No.:

10/939649

Inventors:

Michele Cramer - Sinking Spring PA, US
Glenn Correll - Birdsboro PA, US
Nancy Osenbach - New Ringgold PA, US

International Classification:

C08L083/04

US Classification:

525476000, 525479000

Abstract:

The present invention provides powder compositions comprising from 20 to 90 phr of one or more than one silicone resin having a glass transition temperature (Tg) of at least 40 C., from 10 to 80 phr of one or more than one resin chosen from glycidyl functional acrylic resin, mixtures of aromatic epoxy resin or novolac resin with carboxyl functional acrylic resin carboxyl functional polyester resin or glycidyl functional acrylic resin, and one or more than one filler, such as wollastonite, barium sulfate, mica, talc, alumina, layered silicates like montmorillonite, and mixtures thereof. The one or more than one silicone resin may or may not be flaked and may or may not contain silanol groups. The compositions of the present invention provide single layer or multilayer powder coatings that are free of voids larger than 30 μm in diameter, and which may meet the UL Class H (180 C.) certification for electrical insulation applications. Further, the compositions may be used to provide powder coatings, films, moldings, electrical potting compounds and electrical encapsulation compounds.

US Patent:

63160498, Nov 13, 2001

Filed:

Jan 4, 2000

Appl. No.:

9/477437

Inventors:

Owen H. Decker - Wyomissing PA
Charles P. Tarnoski - Sinking Spring PA
Michele L. Cramer - Sinking Spring PA

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

B05D 302
B05D 310
B05D 500
C08G 5916
C08G 5972

US Classification:

427195

Abstract:

Coating compositions comprising an epoxy resin and a curative which is methylenedisalicylic acid and/or a methylendisalicylic acid ring-substituted homologue are found to cure at and produce a wrinkle finish at relatively low temperatures when a borontrifluoride:amine complex is used as the cure catalyst.