DRY POWDER BLENDS OF AMORPHOUS PERFLUORINATED POLYMERS, METHODS OF MAKING THE SAME, AND ARTICLES DERIVED FROM THE DRY POWDER BLENDS

Described herein is a method of making a curable perfluoroelastomer, wherein the curable perfluoroelastomer comprises particles of a semi crystalline fluoropolymer, wherein the semi crystalline fluoropolymer is a TFE copolymer comprising no more than 1 wt % of at least one additional fluorinated monomer. The method comprises: (a) obtaining an amorphous perfluoropolymer and the particles of the semi crystalline fluoropolymer; and (c) dry blending the amorphous perfluoropolymer and the particles to form a curable perfluoroelastomer. 1. A dry powder blend comprising (i) an amorphous perfluoropolymer comprising a cure site selected from the group consisting of —CN , —I , and —Br , and (ii) a plurality of semi crystalline fluoropolymer particles , wherein the semi crystalline fluoropolymer particles comprise a tetrafluoroethylene copolymer comprising no more than 1 wt % of at least one additional fluorinated monomer as determined by Fourier Transform-Infrared spectrometry , wherein the semi crystalline fluoropolymer particles (i) have an melt flow index (372° C. with 2.16 kg) of less than 50 g/10 min or (ii) are not melt processible and have an standard specific gravity of less than 2.200.2. The dry blend of claim 1 , wherein the blend has a melting temperature and the melting temperature of the blend is at least 3° C. lower than the melting point of the semi crystalline fluoropolymer particles.3. The dry blend of claim 1 , wherein the melting temperature of the blend is greater than 320° C. and less than 329° C.4. (canceled)5. The dry blend of claim 1 , wherein the dry powder blend has a decomposition temperature claim 1 , and the decomposition temperature at least 500° C. and at most 510° C.6. The dry blend of claim 1 , wherein the dry powder blend has at least one recrystallization point claim 1 , and the at least one recrystallization point is less than 310° C.7. The dry blend of claim 1 , wherein the dry powder blend comprises at least 10 to at most 30 wt % of the ...

FLUOROPOLYMER COATING COMPOSITIONS COMPRISING AMINE CURING AGENTS, COATED SUBSTRATES AND RELATED METHODS

Compositions are described comprising at least one fluoropolymer, a solvent and an amino compound. The fluoropolymer comprises at least 90% by weight based on the total weight of the fluoropolymer of polymerized units derived from perfluorinated monomers selected from tetrafluoroethene (TFE) and one or more unsaturated perfluorinated alkyl ethers. The fluoropolymer typically comprises one or more cure sites, such as nitrile or halogenated cure sites. The solvent typically comprises a branched, partially fluorinated ether. In preferred embodiments the amine compound further comprises a silane group. Also described are methods of making the coating composition, methods of coating a substrate with UV and/or thermal curing, and the coated substrate. 3. The composition of wherein the compound is an amino organosilane ester compound or ester equivalent.4. The composition of wherein the compound comprises a blocked amine group.5. The composition of wherein the composition further comprises an alkoxy silane compound that lacks one or more amine groups.6. The composition of wherein the composition comprises 0.01 to 25% by weight of the fluoropolymer based on the weight of the total composition.8. The composition according to wherein the CF-unit is branched.9. The composition of wherein the fluoropolymer comprises nitrile cure sites.10. The composition of wherein the fluoropolymer comprises one or more cure sites selected from iodine claim 1 , bromine claim 1 , chlorine claim 1 , or a combination thereof;11. The composition of wherein the fluoropolymer comprises 40 to 60% by weight of polymerized units of TFE based on the total weight of the fluoropolymer.12. The composition of wherein the fluoropolymer contains 0 to 5 wt.-% of polymerized units derived from non-fluorinated or partially fluorinated monomers.14. The composition of wherein the solvent has a GWP of less than 1000.16. (canceled)17. The composition of wherein the composition lacks a free-radical photoinitiator.18. ...

FLUOROPOLYMER NANOPARTICLE COATING COMPOSITION

A method of making a fluoropolymer coating composition is described comprising blending a latex comprising crystalline submicron fluoropolymer particles with a latex comprising amorphous fluoropolymer particles. The method further comprises coagulating and drying the blended latexes and dissolving the dried blended latexes in a fluorinated solvent. Also described is a fluoropolymer (e.g. coating) composition comprising crystalline submicron fluoropolymer particles dispersed in a solution of fluorinated solvent and amorphous fluoropolymer; the fluoropolymer composition after removal of the solvent; and a substrate comprising a coated surface of the fluoropolymer composition. In each of these embodiments, he amorphous fluoropolymer comprises at least 90 wt-% of polymerized units derived from perfluorinated monomers selected from tetrafluoroethene (TFE) and one or more unsaturated perfluorinated alkyl ethers. 1. A method for making a fluoropolymer coating composition comprising blending a latex containing crystalline submicron fluoropolymer particles with a latex containing amorphous fluoropolymer particles , wherein the amorphous fluoropolymer particles comprises at least 90 wt-% of polymerized units derived from perfluorinated monomers selected from tetrafluoroethene (TFE) and one or more perfluorinated alkyl ethers;coagulating and drying the blended latexes; anddissolving the dried blend in a fluorinated solvent.3. The method of comprising coagulating the latexes by chilling.4. The method of further comprising applying a layer of the coating composition to a support and drying the applied layer.5. The method of further comprising rubbing the dried layer thereby forming an amorphous fluoropolymer binder layer containing crystalline submicron fluoropolymer particles.6. The method of wherein the fluorinated solvent has a GWP of less than 1000.8. The composition of wherein the partially fluorinated ether of the solvent corresponds to the formula:{'br': None, 'sub': p', ...

Composition and Article Including Fluoropolymer and Branched Silsesquioxane Polymer

The composition can include a fluoropolymer and a branched silsesquioxane polymer having terminal —Si(R)groups and units having formula, in which * represents a bond to another silicon atom in the branched silsesquioxane polymer, R is an organic group comprising an aliphatic carbon-carbon double bond, and Ris a non-hydrolyzable group or hydrogen. The fluoropolymer can be crosslinked with the branched silsesquioxane polymer. An article can include a first composition including a fluoropolymer in contact with a second composition including a silicone, wherein at least one of the first composition or second composition includes the branched silsesquioxane polymer. At least one of the fluoropolymer or the silicone can be crosslinked with a branched silsesquioxane polymer including terminal —Si(R)groups and units having formula, in which R* is an organic group comprising a carbon-carbon bond between the branched silsesquioxane polymer and the fluoropolymer, the silicone, or another R* group. 3. The composition of claim 1 , wherein each R is independently represented by —Y—Z claim 1 , wherein Y is a bond claim 1 , alkylene claim 1 , arylene claim 1 , or alkylene at least one of interrupted or terminated by arylene claim 1 , and wherein Z is —CH═CH claim 1 , —O—CH═CH claim 1 , —O—C(O)—CH═CH claim 1 , —O—C(O)—C(CH)═CH claim 1 , —NR′—C(O)—CH═CH claim 1 , or —NR′—C(O)—C(CH)═CH claim 1 , wherein R′ is hydrogen or alkyl having up to four carbon atoms claim 1 , or wherein —Y—Z is —CH—CH═CH.4. The composition of claim 1 , wherein each Ris independently alkyl having up to four carbon atoms.5. The composition of claim 1 , wherein the fluoropolymer is an amorphous claim 1 , curable fluoropolymer.6. The composition of claim 1 , wherein the fluoropolymer comprises at least one of choro claim 1 , bromo claim 1 , iodo claim 1 , or cyano cure sites.7. The composition of claim 1 , further comprising a peroxide initiator.8. The composition of claim 1 , further comprising at least one of ...

Fluorinated elastomers cured by actinic radiation and methods thereof

Described herein is a curable composition comprising an amorphous fluoropolymer having an iodine, bromine and/or nitrile cure site; a peroxide cure system comprising a peroxide and a Type II coagent; and a photoinitiator, wherein the curable composition is substantially free of a binder material. Also described herein, are methods of curing the curable composition using actinic radiation and articles thereof.

Functional, partially-fluorinated silanes

Functional, partially-fluorinated silane compound according to Formula (I): wherein: X is CH2=CH— or CHCH2—; R1 and R2 are linear or branched alkylenes having 1 to 4 carbon atoms; Rf is a perfluoro(alkylene) group having 1 to 8 carbon atoms and, optionally, at least one catenary heteroatom selected from the group consisting of O and N; c is equal to the number of carbon atoms in X; and Y is —Cl or —OR, wherein R is a linear or branched alkyl having 1 to 4 carbon atoms. In some embodiments, Y is —O(CH2)xCH3 wherein x is an integer from 0 to 3 are described. Methods of making and using such functional, partially-fluorinated silane compounds are also described

PARTIALLY-FLUORINATED SILANE BONDING AGENT

Articles comprising a fluoropolymer-containing composition bonded to a silicone polymer-containing composition are described, where at least one of the compositions comprise a partially-fluorinated silane bonding agent. Methods of preparing such articles, and exemplary articles such as fuel hoses are also described. 2. The article of claim 1 , wherein p is 0 such that the bonding agent is a partially-fluorinated silane bonding agent according to Formula II:{'br': None, 'sub': f', '2', 'm', '3, 'X—R—(CH)—Si—Y.\u2003\u2003(II)'}3. The article of claim 1 , wherein Ris a linear or branched perfluoro(alkylene) group.4. The article of claim 3 , wherein Ris a linear perfluoro(alkylene) group having the formula (CF)wherein n is 3 or 4 claim 3 , optionally wherein n is 4.5. The article according to claim 1 , wherein Rcomprises at least 5 carbon atoms claim 1 , and five or six carbon atoms of Rare bonded together to form a ring.6. The article according to claim 1 , wherein m is 2 or 3 claim 1 , optionally wherein m is 2.7. The article according to claim 1 , wherein Y is —O(CH)CH claim 1 , where x is an integer from 0 to 3.8. The article of claim 7 , wherein x is 0 claim 7 , such that Y is —OCH.9. The article of claim 8 , wherein m is 2 claim 8 , and n is 4 such that the bonding agent is a partially-fluorinated silane bonding agent according to Formula III:{'br': None, 'sub': 4', '8', '2', '2', '3', '3, 'X—CF—CH—CH—Si—(OCH).\u2003\u2003(III)'}10. The article according to claim 1 , wherein X is selected from the group consisting of CH═CH— claim 1 , CH═CHCH— claim 1 , and CH═CHCH—O—.11. The article of claim 10 , wherein X is CH═CH—.12. The article according to claim 1 , wherein the first composition comprises at least a portion of the partially-fluorinated silane bonding agent.13. The article of claim 12 , wherein the first composition comprises between 0.1 and 10% by weight of the partially-fluorinated silane bonding agent claim 12 , based on the weight of the fluoropolymer in ...

FLUORINATED ELASTOMERS CURED BY ACTINIC RADIATION AND METHODS THEREOF

Described herein is a curable composition comprising an amorphous fluoropolymer having an iodine, bromine, and/or nitrile cure site; a peroxide cure system comprising a peroxide and a Type II coagent; and optionally carbon black, wherein the composition is substantially free of a photoinitiator selected from a Type I photoinitiator, a Type II photoinitiator, and/or a 3-component electron transfer initiating system. The curable composition is exposed to actinic radiation to at least partially cure the curable composition. 1. A method of at least partially curing a fluoroelastomer , the method comprising: (a) an amorphous fluoropolymer having a plurality of cure sites wherein the cure sites comprise iodine, bromine, nitrile, or combinations thereof; and', '(b) a peroxide cure system comprising a peroxide and a Type II coagent; wherein the composition is substantially free of a photoinitiator, wherein the photoinitiator is selected from a Type I photoinitiator, a Type II photoinitiator, and a 3-component electron transfer initiator system; and, '(i) obtaining a composition comprising(ii) exposing at least a surface of the composition to actinic radiation.2. The method of claim 1 , wherein the composition further comprises carbon black.3. The method of claim 1 , wherein the amorphous fluoropolymer comprises at least 0.1 weight % of iodine versus the total weight of the amorphous fluoropolymer.4. The method of claim 1 , wherein the amorphous fluoropolymer comprises at least 0.1 weight % of bromine versus the total weight of the amorphous fluoropolymer.5. The method of claim 1 , wherein the amorphous fluoropolymer is partially fluorinated.6. The method of claim 1 , wherein the amorphous fluoropolymer is a copolymer of wherein the amorphous fluoropolymer comprises (i) a copolymer comprising hexafluoropropylene claim 1 , tetrafluoroethylene claim 1 , and vinylidene fluoride monomeric units; (ii) a copolymer comprising hexafluoropropylene and vinylidene fluoride monomeric ...

PEROXIDE-CURED HALOGENATED ELASTOMERS HAVING A SILICON-CONTAINING SUPERFICIAL LAYER

Described herein is curable composition comprising a partially halogenated elastomeric gum comprising a plurality of cure sites selected from at least one of iodine, bromine, and nitrile; a silicon-containing compound; a dehydrohalogenation agent; and a peroxide cure system. Upon curing, a silicon-containing superficial layer forms, which can provide good chemical stability, increased durability, non-tackiness, and a matte finish to the cured elastomer. 1. A curable partially halogenated elastomeric gum composition comprising:(a) a partially halogenated elastomeric gum comprising (i) at least 25% halogen by weight, wherein the halogen is at least one of fluorine and chlorine and (ii) a plurality of cure sites wherein the cure sites are selected from at least one of iodine, bromine, and nitrile;(b) at least 0.01 parts by mass of a silicon-containing compound per 100 parts by mass of the partially halogenated elastomeric gum;(c) a dehydrohalogenation agent; and(d) a curing system, wherein the curing system consists essentially of a peroxide and a coagent.2. The composition of claim 1 , wherein the partially halogenated elastomeric gum is a fluorinated amorphous polymer or a chlorinated amorphous polymer.3. The composition of claim 2 , wherein fluorinated amorphous polymer comprises interpolymerized vinylidene fluoride monomeric units.4. The composition of claim 2 , wherein the fluorinated amorphous polymer comprises at least one of: (i) a copolymer comprising tetrafluoroethylene claim 2 , vinylidene fluoride claim 2 , and hexafluoropropylene monomeric units; (ii) a copolymer comprising tetrafluoroethylene claim 2 , and propylene monomeric units; (iii) a copolymer comprising tetrafluoroethylene claim 2 , vinylidene fluoride claim 2 , and propylene monomeric units; and (iv) a copolymer comprising vinylidene fluoride claim 2 , perfluoro (methyl vinyl) ether claim 2 , and hexafluoropropylene monomeric units; (v) a copolymer comprising tetrafluoroethylene claim 2 , ...

Silicon-containing halogenated elastomers

Described herein is curable composition comprising a halogenated amorphous polymer having at least 25% halogen by weight; at least 0.5 phr of an acid acceptor; at least 0.01 phr of silicon-containing compound; and a dehydrohalogenation cure system. Upon curing, a silicon-containing superficial layer forms, which can provide increased durability, non-tackiness, and a matte finish to the cured elastomer.

Full length control rod employing axially inhomogeneous absorber materials for zero reactivity redistribution factor

A neutron absorber control rod for use in a fuel assembly of a nuclear reactor includes an elongated hollow tubular member having opposite ends and a hermetically sealed chamber defined therein between its opposite ends, one of the member ends being a leading end and the other of the member ends being a trailing end upon insertion of the control rod into the fuel assembly. A first neutron absorber material in the form of boron carbide pellets is contained in the chamber and located nearer to the leading than to the trailing end of the member, whereas a second neutron absorber material in the form of silver-indium-cadmium pellets is contained in the chamber and located nearer to the leading than to the trailing end of the member. The second neutron absorber material has a length approximately three times longer than that of the first neutron absorber material.

Fluoropolymer coating compositions comprising amine curing agents, coated substrates and related methods

Compositions are described comprising at least one fluoropolymer, a solvent and an amino compound. The fluoropolymer comprises at least 90% by weight based on the total weight of the fluoropolymer of polymerized units derived from perfluorinated monomers selected from tetrafluoroethene (TFE) and one or more unsaturated perfluorinated alkyl ethers. The fluoropolymer typically comprises one or more cure sites, such as nitrile or halogenated cure sites. The solvent typically comprises a branched, partially fluorinated ether. In preferred embodiments the amine compound further comprises a silane group. Also described are methods of making the coating composition, methods of coating a substrate with UV and/or thermal curing, and the coated substrate.

Electronic Telecommunications Articles Comprising Crosslinked Fluoropolymers and Methods

Electronic telecommunication articles are described comprising a crosslinked fluoropolymer layer. In typical embodiments, the crosslinked fluoropolymer layer is a substrate, patterned (e.g. photoresist) layer, insulating layer, passivation layer, cladding, protective layer, or a combination thereof. Also describes are methods of making an electronic telecommunications article and method of forming a patterned fluoropolymer layer. The fluoropolymer preferably comprises at least 80, 85, or 90% by weight of polymerized units of perfluorinated monomers and cure sites selected from nitrile, iodine, bromine, and chlorine. Illustrative electronic communication articles include integrated circuits, printed circuit boards, antennas, and optical fiber cables. Fluoropolymer compositions are also described.

Bonding highly-fluorinated plastics to elastomers using silane-based primers

Methods of bonding highly-fluorinated thermoplastics to elastomers are described. The methods include apply primers comprising at least one aromatic silane and at least one amino-silane to an uncured elastomer and irradiating the primer with actinic radiation before or after applying the highly-fluorinated thermoplastics. The elastomer may then be cured to provide articles having good adhesion between the highly-fluorinated thermoplastic and the cured elastomer.

Fluorinated elastomers cured by actinic radiation and methods thereof

Described herein is a curable composition comprising an amorphous fluoropolymer having an iodine, bromine and/or nitrile cure site; a peroxide cure system comprising a peroxide and a Type II coagent; and a photoinitiator, wherein the curable composition is substantially free of a binder material. Also described herein, are methods of curing the curable composition using actinic radiation and articles thereof.

Electronic telecommunications articles comprising crosslinked fluoropolymers and methods

Provided is an electronic telecommunication article comprising a crosslinked fluoropolymer layer, wherein the fluoropolymer comprises at least 80, 85, or 90% by weight of polymerized units of perfluorinated monomers and cure sites. Further provided is a method of forming a patterned fluoropolymer layer, a composition for use for forming a patterned fluoropolymer layer, and a method of making an electronic telecommunication article.

Fluoropolymer compositions comprising fluorinated additives, coated substrates and methods

A composition is described comprising at least one fluoropolymer. The fluoropolymer comprises at least 90% by weight based on the total weight of the fluoropolymer of polymerized units derived from perfluorinated monomers selected from tetrafluoroethene (TFE) and one or more unsaturated perfluorinated alkyl ethers and a fluorinated additive having a Mw of no greater than 50,000 g/mole comprising a partially fluorinated or perfluorinated alkyl or ether group. In some embodiments, the composition further comprises a fluorinated solvent. Also described are substrates comprising a coated surface of the fluoropolymer composition described herein.

Electronic telecommunications articles comprising crosslinked fluoropolymers and methods

Electronic telecommunication articles are described comprising a crosslinked fluoropolymer layer. In typical embodiments, the crosslinked fluoropolymer layer is a substrate, patterned (e.g. photoresist) layer, insulating layer, passivation layer, cladding, protective layer, or a combination thereof. Also describes are methods of making an electronic telecommunications article and method of forming a patterned fluoropolymer layer. The fluoropolymer preferably comprises at least 80, 85, or 90% by weight of polymerized units of perfluorinated monomers and cure sites selected from nitrile, iodine, bromine, and chlorine. Illustrative electronic communication articles include integrated circuits, printed circuit boards, antennas, and optical fiber cables. Fluoropolymer compositions are also described.

Fluoropolymer coating compositions comprising aminosilane curing agents, coated substrates and related methods

Fluoropolymer Compositions Comprising A Curing Agent with Ethylenically Unsaturated and Electron Donor Groups, and Substrates Coated Therewith

A method of making a crosslinked fluoropolymer is described. The method comprises applying a composition to a substrate, wherein the composition comprises fluoropolymer and a fluorinated solvent, one or more curing agents comprising an ethylenically unsaturated group and an electron donor group or precursor thereof. The method further comprises removing the solvent and curing the fluoropolymer with actinic (e.g. ultraviolet “UV”) radiation. Also described is a composition comprising a fluoropolymer dissolved in a fluorinated solvent, and one or more curing agents comprising an ethylenically unsaturated group and an electron donor group or precursor thereof; and article comprising the crosslinked fluoropolymer.

Electronic telecommunications articles comprising crosslinked fluoropolymers and methods

Electronic telecommunication articles are described comprising a crosslinked fluoropolymer layer. In typical embodiments, the crosslinked fluoropolymer layer is a substrate, patterned (e.g. photoresist) layer, insulating layer, passivation layer, cladding, protective layer, or a combination thereof. Also describes are methods of making an electronic telecommunications article and method of forming a patterned fluoropolymer layer. The fluoropolymer preferably comprises at least 80, 85, or 90% by weight of polymerized units of perfluorinated monomers and cure sites selected from nitrile, iodine, bromine, and chlorine. Illustrative electronic communication articles include integrated circuits, printed circuit boards, antennas, and optical fiber cables. Fluoropolymer compositions are also described.

Fluoropolymer coating compositions comprising amine curing agents, coated substrates and related methods

Compositions are described comprising at least one fluoropolymer, a solvent and an amino compound. The fluoropolymer comprises at least 90% by weight based on the total weight of the fluoropolymer of polymerized units derived from perfluorinated monomers selected from tetrafluoroethene (TFE) and one or more unsaturated perfluorinated alkyl ethers. The fluoropolymer typically comprises one or more cure sites, such as nitrile or halogenated cure sites. The solvent typically comprises a branched, partially fluorinated ether. In preferred embodiments the amine compound further comprises a silane group. Also described are methods of making the coating composition, methods of coating a substrate with UV and/or thermal curing, and the coated substrate.

Functional, partially-fluorinated silanes

Functional, partially-fluorinated silane compound according to Formula (I): wherein: X is CH2=CH- or CHCH2-; R1 and R2 are linear or branched alkylenes having 1 to 4 carbon atoms; Rf is a perfluoro(alkylene) group having 1 to 8 carbon atoms and, optionally, at least one catenary heteroatom selected from the group consisting of O and N; c is equal to the number of carbon atoms in X; and Y is -Cl or -OR, wherein R is a linear or branched alkyl having 1 to 4 carbon atoms. In some embodiments, Y is -O(CH2)xCH3 wherein x is an integer from 0 to 3 are described. Methods of making and using such functional, partially-fluorinated silane compounds are also described

Fluoropolymer compositions comprising fluorinated additives, coated substrates and methods

Bonding highly-fluorinated plastics to elastomers using silane-based primers

Methods of bonding highly-fluorinated thermoplastics to elastomers are described. The methods include apply primers comprising at least one aromatic silane and at least one amino-silane to an uncured elastomer and irradiating the primer with actinic radiation before or after applying the highly-fluorinated thermoplastics. The elastomer may then be cured to provide articles having good adhesion between the highly-fluorinated thermoplastic and the cured elastomer.

Fluorinated elastomers cured by actinic radiation and methods thereof

Described herein is a curable composition comprising an amorphous fluoropolymer having an iodine, bromine, and/or nitrile cure site; a peroxide cure system comprising a peroxide and a Type II coagent; and optionally carbon black, wherein the composition is substantially free of a photoinitiator selected from a Type I photoinitiator, a Type II photoinitiator, and/or a 3-component electron transfer initiating system. The curable composition is exposed to actinic radiation to at least partially cure the curable composition.