A curable fluoropolymer composition containing a copolymer of vinylidene fluoride and hexafluoropropylene or the like, a vulcanization accelerator which is a quaternary ammonium compound or a quarternary phosphonium compound, a crosslinking agent such as a bisphenol, a divalent metal oxide or divalent metal hydroxide acid acceptor, and as a coaccelerator a polyol e.g. pentaerythritol or the like.
A process for rapidly curing a brominated fluoroelastomer
申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP0140207A2
公开(公告)日:1985-05-08
A process for rapidly curing a fluoroelastomer which comprises mixing and heating a fluoroelastomer copolymer whose interpolymerized units consist essentially of vinylidene fluoride, at least one other fluorine-containing monomer copolymerizable therewith, said monomer being a compound which contains 2-7 carbon atoms, contains no bromine, and contains at least as many fluorine atoms as carbon atoms and contains up to 3 mole percent of units derived from a bromine-containing olefin; a quaternary phosphonium compound; a bisphenol or an ammonium or phosphonium salt thereof; and a dialkylaminopyridine or a diazabicyclo compound having the formula
where n is 2-8 or
0.2-0.8 parts by weight per hundred parts fluoroelastomer of a carboxylic acid salt of (a) or (b).
Fluorelastomer compositions containing a tetraalkylammonium halide and vulcanization accelerator
申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP0339126A1
公开(公告)日:1989-11-02
A fluoroelastomer composition that has enhanced adhesion to metal when cured which comprises:
(a) an elastomeric copolymer of vinylidene fluoride and at least one other fluorinated monomer,
(b) a vulcanization accelerator that is a quaternary phosphonium compound,
(c) a crosslinking agent selected from the group consisting of a bisphenol or a polyhydroxy phenol of the formula:
where R is H or an alkyl group or an aryl group and R′ is an alkyl group or an aryl group, and
(d) 0.02-0.8 weight percent based on the weight of the elastomeric copolymer of a metal adhesion promoter that is a tetraalkylammonium halide where each alkyl group contains 1-10 carbon atoms and the halide is a chloride, bromide or iodide. When cured in contact with metal the fluoroelastomer composition forms a strong bond with the metal surface.
一种固化后可增强与金属粘附性的氟橡胶组合物,包括
(a) 亚氟乙烯和至少一种其他氟化单体的弹性共聚物、
(b) 一种硫化促进剂,它是一种季鏻化合物、
(c) 一种交联剂,该交联剂选自由下列物质组成的组
其中 R 是 H 或烷基或芳基,R′是烷基或芳基,及
(d) 0.02-0.8 重量百分比的金属附着力促进剂(以弹性共聚物的重量为基准),金属附着力促进剂为四烷基卤化铵,其中每个烷基含有 1-10 个碳原子,卤化物为氯化物、溴化物或碘化物。当氟橡胶组合物与金属接触固化时,会与金属表面形成牢固的粘结。
AQUEOUS COMPOSITION FOR VULCANIZATION OF FLUORO RUBBER AND ARTICLE COATED WITH FLUORO RUBBER
申请人:Daikin Industries, Ltd.
公开号:EP1138718A1
公开(公告)日:2001-10-04
A one-fluid type aqueous curing composition of a fluoroelastomer comprising water, a fluoroelastomer at least a part of terminal groups of which are non-functional groups, and a curing agent. This composition has a long pot-life and provides a cured film with a high strength while it contains the fluoroelastomer at a high solid content. An article coated with a coating layer formed from this aqueous curing composition, in particular, the rolls of office automation equipment, can solve the drawbacks of articles coated with a film formed from a conventional one-liquid type aqueous curing composition of a fluoroelastomer, for example, insufficient strength of the coating layer.