摘要:
A method for increasing the adhesion of a first layer comprising a fluoropolymer substantially free of interpolymerized units derived from vinylidene fluoride to a second layer comprising a curable elastomer is described. The method comprises adding a dehydrofluorinating composition to the curable elastomer, contacting the layers and curing the layered article so formed. The resulting multilayer compositions and articles are also disclosed.
摘要:
This invention provides fluorine-containing polymers having at least one thioorgano group. These polymers are prepared by reacting a fluoropolymer precursor with one or more, organic, thiolate compounds thereby modifying the fluoropolymer precursor by grafting onto its backbone the thioorgano groups. Said thioorgano groups may contain functional moieties that modify the cure properties, bulk, properties or compatibility of the thioorgano fluoropolymer precursor. This invention also provides shaped or formed cured articles, coatings and solutions comprising the thioorgano fluoropolymers, and blends thereof with other compatible polymers.
摘要:
Compositions comprising a fluoropolymer derived from a nitrogen-containing cure site monomer, a catalyst composition which comprises at least one anionic functional group and at least one cationic functional group having the formula QR′k(+), wherein Q is selected from phosphorous, sulfur, nitrogen, arsenic, or antimony, wherein each R′ is independently selected from hydrogen and a nonfluorinated, partially fluorinated, or perfluorinated, C1-C20 alkyl, aryl, aralkyl, or alkenyl group, and wherein k is the valence of Q plus one; wherein the catalyst composition is a compound or the precursors thereof added separately or as a mixture; and a composition of the formula: R″2SOx wherein each R″ is C1-C30 alkyl, aralkyl, the two R″ groups together form a heterocyclic C3-C30 cycloalkyl, aryl, or aralkyl, each R″ can be fluorinated, and x is 1 or 2. Also provided are methods of making a fluoropolymer and fluoropolymer articles containing fluoropolymer compositions.
摘要翻译:包含衍生自含氮固化位点单体的含氟聚合物的组合物,包含至少一个阴离子官能团的催化剂组合物和至少一种具有式QR'(+ )其中Q选自磷,硫,氮,砷或锑,其中每个R'独立地选自氢和非氟化,部分氟化或全氟化的C 1 H 2, -C 20烷基,芳基,芳烷基或烯基,其中k是Q + 1的化合价; 其中所述催化剂组合物是分别或作为混合物加入的化合物或其前体; 和式“R”2 SO x x的组合物,其中每个R“为C 1 -C 30 - , - 烷基,芳烷基,两个R“基团一起形成杂环C 3 -C 30 - 环烷基,芳基或芳烷基,每个R”可以被氟化, 并且x是1或2.还提供了制备含氟聚合物组合物的含氟聚合物和含氟聚合物制品的方法。
摘要:
A composition comprising (a) a fluoropolymer having pendant imidate groups, which imidate groups have the formula: —C═NH(OR) wherein R is a C1-C10 aliphatic group which aliphatic group may have F or Cl substituents; and optionally, (b) a perfluorovinyl ether of the general formula: CF2═CFO(R′fO)a(R″fO)bRf wherein R′f and R″f are the same or are different C1-C6 linear or branched perfluoroalkylene groups; a and b are, independently, 0 or an integer from 1 to 10; and Rf is a C1-C8 perfluoroalkyl group or a C1-C15 perfluoroalkoxy group. Also provided are a method of making a fluoropolymer composition and curable and cured articles comprising a fluoropolymer composition.
摘要:
A method for enhancing the bond strength between a VDF-containing fluoroplastic layer and an elastomer layer of a multi-layer article. A VDF-containing fluoroplastic composition is applied to the surface of a precursor article that includes a curable elastomer layer to form a fluoroplastic layer. Prior to application of the fluoroplastic composition, the curable elastomer layer is thermally insulated to prevent it from undergoing substantial heating. Following application, the fluoroplastic layer is heated and the curable elastomer layer is cured (e.g., thermally cured). Preferably, the elastomer cure occurs separately from and subsequent to heating the fluoroplastic layer. The combination of thermally insulating the curable elastomer layer prior to application of the fluoroplastic composition and heating the fluoroplastic layer following application of the fluoroplastic composition results in formation of a strong bond between the fluoroplastic and elastomer layers upon cure.
摘要:
A composition that includes: (a) a fluoropolymer comprising interpolymerized units derived from a cure site monomer comprising a nitrile group; and (b) a catalyst composition comprising a divalent metal amine complex compound having the formula: where M is a divalent metal, X is an anionic group, and n is 2 to 6, as well as a method for curing this composition and cured articles prepared from this composition.
摘要:
A fluoroelastomer composition having improved compression set. The fluoroelastomer composition comprises: (1) a fluoroelastomer containing interpolymerized units of at least one perfluoroolefin, at least one perfluorovinyl ether, and a cure site component capable of participation in a peroxide cure reaction; (2) an additive selected from the group consisting of organo-oniums, phosphates, phosphine oxides, amine oxides, alkyl amines, and heterocyclic amines and salts of heterocyclic amines; (3) a peroxide curative, and (4) optionally a coagent.
摘要:
A composite article is provided which includes a fluoropolymer intimately bonded to a component including a substantially non-fluorinated thermoplastic having pendant phenolic groups in combination with a base. Increased adhesion is observed by a greater peel strength value between the fluoropolymer component and a non-fluorinated thermoplastic having pendant phenolic groups.
摘要:
Vulcanizable fluorocarbon elastomer compositions containing a vinylidene fluoride copolymer and a fluoroaliphatic sulfonamide curing agent. A second curing agent selected from organic polyhydroxy compounds or derivatives thereof, and an organo-onium accelerator are also employed. The compositions of this invention can be used to prepare shaped articles that exhibit high tensile strength accompanied by high elongation and a low value of compression set.