Abstract: A curable composition comprises a fluorinated polyether represented by the formula: Z1—X1p and a nonfluorinated polyether represented by the formula Q1-X2yZ1 represents a p-valent perfluorinated polyether group. Q1 represents a y-valent hydrocarbon polyether group. Each X1 and X2 group independently represents a functional group. p and y are integers ?2. At least some of the p X1 groups are reactive to at least some of the y X2 groups to form a covalently cross-linked polymer network. Hybrid fluoroelastomers made by curing the curable compositions are also disclosed.

Abstract: A curable composition is provided. The curable composition has at least one functionalized fluoropolyether and at least one radical curing system. Further provided are fluoroelastomer compositions having a glass transition temperature of less than ?40° C. and shaped articles comprising fluoroelastomers having glass transition temperatures of less than ?40° C. obtained by curing the curable compositions. Also described are methods of making fluoroelastomer compositions having glass transition temperatures of less than ?40° C.

Abstract: A curable precursor composition for a fluoroelastomers, methods of making fluoroelastomers, shaped articles and methods of making shaped articles.

Abstract: A curable composition includes a functionalized fluoropolyether comprising at least one first free-radically reactive functional group, a functionalized polysiloxane comprising at least one second free-radically reactive functional group, and an effective amount of a free-radical curing system. The curable composition can be cured to making a fluoropolyether-polysiloxane elastomer. Compositions and shaped articles including the fluoropolyether-polysiloxane elastomer are also disclosed.

Abstract: A curable composition comprises a fluorinated polyether represented by the formula: Z1—X1p and a nonfluorinated polyether represented by the formula Q1-X2yZ1 represents a p-valent perfluorinated polyether group. Q1 represents a y-valent hydrocarbon polyether group. Each X1 and X2 group independently represents a functional group. p and y are integers ?2. At least some of the p X1 groups are reactive to at least some of the y X2 groups to form a covalently cross-linked polymer network. Hybrid fluoroelastomers made by curing the curable compositions are also disclosed.

Abstract: A method of making a fluoroelastomer composition includes curing a fluoroelastomer precursor composition under ambient pressure conditions resulting in a fluoroelastomer composition that is substantially free of surface bubbles. The fluoroelastomer precursor composition includes peroxide-curable fluoropolymer, an effective amount of peroxide consisting essentially of bis(2,4-dichlorobenzoyl) peroxide for curing the peroxide-curable fluoropolymer. The fluoroelastomer precursor composition is essentially free of non-fluorinated carbon particles. A method of making composite articles based on the method is also disclosed.

Abstract: A curable composition includes a functionalized fluoropolyether comprising at least one first free-radically reactive functional group, a functionalized polysiloxane comprising at least one second free-radically reactive functional group, and an effective amount of a free-radical curing system. The curable composition can be cured to making a fluoropolyether-polysiloxane elastomer. Compositions and shaped articles including the fluoropolyether-polysiloxane elastomer are also disclosed.

Abstract: There is provided a curable composition comprising: a) fluoropolyethers having a molecular weight of from about 400 g/mole up to about 20,000 g/mole and containing moieties selected from (—(CF2)4O—), (—(CF2)2O—), (—CF2O—) or combinations thereof and further containing at least one nitrile group at a terminal position or at a position that is adjacent to the terminal position; and b) one or more curing agents selected from non-fluorinated compounds containing one or more functional group linked to a common residue, said residue containing at least three carbon atoms wherein the functional groups are selected from primary amines, secondary amines and functional groups that generate primary or secondary amines upon heat treatment, wherein the composition can be cured by generating groups having a triazine structure. Also provided are cured composition, methods of making cured compositions, articles made by curing the cured compositions and methods of making articles using the curable composition.

Abstract: A curable precursor composition for a fluoroelastomers, methods of making fluoroelastomers, shaped articles and methods of making shaped articles.

Abstract: A method of making a fluoropolyether elastomer containing triazine groups and having a glass transition temperature of less than ?40° C.

Abstract: A composite material comprising a first component directly bonded to a second component, the first component comprising a peroxide cured fluoroelastomer having a temperature reflection TR-10 of ?19 C or lower as measured according to ASTM D 1329 and the second component comprising a polyamide resin, and methods of making such composite materials and shaped articles containing the composite materials.

Abstract: There is provided a curable composition comprising: a) fluoropolyethers having a molecular weight of from about 400 g/mole up to about 20,000 g/mole and containing moieties selected from (—(CF2)4O—), (—(CF2)2O—), (—CF2O—) or combinations thereof and further containing at least one nitrile group at a terminal position or at a position that is adjacent to the terminal position; and b) one or more curing agents selected from non-fluorinated compounds containing one or more functional group linked to a common residue, said residue containing at least three carbon atoms wherein the functional groups are selected from primary amines, secondary amines and functional groups that generate primary or secondary amines upon heat treatment, wherein the composition can be cured by generating groups having a triazine structure. Also provided are cured composition, methods of making cured compositions, articles made by curing the cured compositions and methods of making articles using the curable composition.

Abstract: A curable composition is provided. The curable composition has at least one functionalized fluoropolyether and at least one radical curing system. Further provided are fluoroelastomer compositions having a glass transition temperature of less than ?40° C. and shaped articles comprising fluoroelastomers having glass transition temperatures of less than ?40° C. obtained by curing the curable compositions. Also described are methods of making fluoroelastomer compositions having glass transition temperatures of less than ?40° C.

Abstract: A method of making a fluoropolyether elastomer containing triazine groups and having a glass transition temperature of less than ?40° C.

Abstract: There is provided a curable fluoroelastomer composition comprising i. a first compound which comprising repeating units derived from a fluorinated olefin and further comprising at least one functional group, ii. a second compound comprising repeating units selected from (—C4F8O—), (—C2F4O—) or (—CF2O) or a combination thereof and further containing at least one functional group capable of reacting with the at least one functional group of the first compound either directly or in the presence of a curing compound to form a triazine unit, wherein the composition after curing by forming triazine units has a glass transition temperature of less than ?60° C. Also provided are shaped articles comprising the cured compositions, methods of making cured compositions and methods for making shaped articles.

Abstract: The present invention relates to a method of bonding a fluoropolymer layer to a silicone layer by (i) providing a fluoropolymer layer comprising a fluoropolymer capable of being dehydrofluorinated (ii) providing a silicone layer comprising a curable silicone composition comprising (a) an organopolysiloxane compound having SiH groups, (b) an organopolysiloxane compound having aliphatic carbon-carbon unsaturated bonds, (c) a hydrosilylation catalyst and (d) an amino compound having (1) an amine function of the formula —NHR wherein R is hydrogen or an organic group and (2) a silyl group of the formula —SiR1n(OR2)3—n wherein R1 represents an alkyl or aryl group, R2 represents an alkyl group of 2 to 6 carbon atoms and n is 1 or 2 and (iii) contacting said silicone layer and said fluoropolymer layer and causing said curable silicone composition of said silicone layer to cure.

Abstract: The present invention provides the use of a mineral oil in a fluoroelastomer composition comprising a fluoroelastomer to improve the flow of said composition during processing to form an article therefrom and/or to improve the release from a mold of a vulcanized article produced from said fluoroelastomer composition. Further provide are a fluoroelastomer composition that includes a mineral oil, a method of making an article therewith and a method of preparing the fluoroelastomer composition.

Abstract: The present invention provides the use of a mineral oil in a fluoroelastomer composition comprising a fluoroelastomer to improve the flow of said composition during processing to form an article therefrom and/or to improve the release from a mold of a vulcanized article produced from said fluoroelastomer composition. Further provide are a fluoroelastomer composition that includes a mineral oil, a method of making an article therewith and a method of preparing the fluoroelastomer composition.