Abstract: Provided herein are curable fluoroelastomer compounds comprising a fluoroelastomer and a curing agent. The curing agent comprises an amidocarboxylic acid and an amidine-containing molecule or a salt that is the product of a reaction between an amidocarboxylic acid and an amidine-containing molecule. Further provided are articles comprising the curable fluoroelastomer compounds or a product of curing the fluoroelastomer compounds; processes for curing the compounds; and processes for making the articles.

Abstract: Provided is a noninvasive hemoglobin detector, including an image acquisition system, an image processing and analysis system and a printing device. The image acquisition system is connected with the image processing and analysis system, and the image acquisition system is used for acquiring, transmitting and storing an image to be tested. The image processing and analysis system is further connected with the printing device, and the image processing and analysis system is used for processing and analyzing the image to be tested to obtain an analysis result. The printing device is used for printing the image to be tested and the analysis result.

Abstract: Curing fluoroelastomers with curing agents of formulas (I), (II), (III), and (IV): wherein each of R1, R2, R3, R4, R6, R7, R8, and R9, is selected from the group consisting of H; halogen atom; C1 to C4 alkyl groups in which the alkyl group is linear, branched, or cyclic; OR?; and aromatic groups; R5 is H; and R? is selected from the group consisting of C1 to C4 alkyl groups in which the alkyl group is linear, branched, or cyclic; and phenyl.

Abstract: Curing fluoroelastomers with curing agents of formulas (I), (II), (III), and (IV): wherein each of R1, R2, R3, R4, R6, R7, R8, and R9, is selected from the group consisting of H; halogen atom; C1 to C4 alkyl groups in which the alkyl group is linear, branched, or cyclic; OR?; and aromatic groups; R5 is H; and R? is selected from the group consisting of C1 to C4 alkyl groups in which the alkyl group is linear, branched, or cyclic; and phenyl.

Abstract: Cured perfluoroelastomers that contain high levels (i.e. greater than 50 phr) BaSO4 exhibit good thermal sealing performance such as reduced sticking and reduced tendency for splitting.

Abstract: Cured perfluoroelastomers that contain high levels (i.e. greater than 50 phr) BaSO4 exhibit good thermal sealing performance such as reduced sticking and reduced tendency for splitting.

Abstract: Peroxide curable fluoroelastomer compositions and articles made therefrom are disclosed. The compositions contain 5 to 45 weight percent, based on total weight of all fluoroelastomers present in the composition, of a blend of dynamically cured fluoroelastomer particles in an uncured fluoroelastomer. The compositions are unfilled, but have tensile properties adequate for many end use applications and are particularly useful as seals in semiconductor manufacturing equipment.

Abstract: Cured perfluoroelastomers that contain high levels (i.e. at least 65 phr carbon black) and 1 to 15 phr of a perfluoropolyether exhibit good resistance to explosive decompression while maintaining good sealing properties.

Abstract: Peroxide curable fluoroelastomer compositions and articles made therefrom are disclosed. The compositions contain 5 to 45 weight percent, based on total weight of all fluoroelastomers present in the composition, of a blend of dynamically cured fluoroelastomer particles in an uncured fluoroelastomer. The compositions are unfilled, but have tensile properties adequate for many end use applications and are particularly useful as seals in semiconductor manufacturing equipment.

Abstract: Cured perfluoroelastomers that contain high levels (i.e. at least 65 phr carbon black) and 1 to 15 phr of a perfluoropolyether exhibit good resistance to explosive decompression while maintaining good sealing properties.

Abstract: Peroxide curable fluoroelastomer compositions and articles made therefrom are disclosed. The compositions contain 5 to 45 weight percent, based on total weight of all fluoroelastomers present in the composition, of a blend of dynamically cured fluoroelastomer particles in an uncured fluoroelastomer. The compositions are unfilled, but have tensile properties adequate for many end use applications and are particularly useful as seals in semiconductor manufacturing equipment.

Abstract: A non-black filled perfluoroelastomer composition comprising a) a perfluoroelastomer having nitrile group cure sites, b) a curative selected from the group consisting of i) a bis(aminophenol) and ii) a compound that decomposes at curing temperatures to generate ammonia and c) 1–25 phr hydrophobic silica filler. Cured compositions have surprisingly better compression set than do similar compounds containing hydrophilic silica.

Abstract: A fluoroelastomer composition comprising a) a fluoroelastomer, b) a curative and c) barium sulfate having an average particle size less than 200 nm is disclosed. This composition loses less weight and produces fewer particles when exposed to reactive plasmas than do similar compositions which contain larger particle size barium sulfate.

Abstract: A non-black filled perfluoroelastomer composition comprising a) a perfluoroelastomer having nitrile group cure sites, b) a curative selected from the group consisting of i) a bis(aminophenol) and ii) a compound that decomposes at curing temperatures to generate ammonia and c) 1-25 phr hydrophobic silica filler. Cured compositions have surprisingly better compression set than do similar compounds containing hydrophilic silica.

Abstract: Perfluoroelastomer articles comprising perfluoroelastomers having copolymerized units of tetrafluoroethylene, a perfluoro(vinyl ether), and a nitrile-containing cure site monomer are at least partially cured and then exposed in air to temperatures between 150° and 350° C. for 1 to 70 hours in order to lighten the article's color and render it translucent or transparent. The resulting articles contain less than 200 ppm metals.

Abstract: Cured perfluoroelastomer articles are disclosed which have improved surface characteristics. The articles are coated with a thin durable film of thermoplastic fluoropolymer which reduces surface stickiness.