Patent application number | Description | Published |
20080207861 | Curable base-resistant fluoroelastomers - Compositions of fluoroelastomers containing copolymerized units of tetrafluoroethylene, propylene, a first cure site selected from the group consisting of i) trifluoroethylene, ii) 3,3,3-trifluoropropene-1, iii) 1,2,3,3,3-pentafluoropropylene, iv) 1,1,3,3,3-pentafluoropropylene, and v) 2,3,3,3-tetrafluoropropene, and a second cure site selected from the group consisting of i) copolymerized units of a brominated cure site monomer, ii) copolymerized units of an iodinated cure site monomer, iii) copolymerized units of a chlorinated cure site monomer, iv) brominated endgroups, v) iodinated endgroups and vi) a combination of any of i)-v) are readily curable with polyhydroxy curing systems. The resulting cured articles have a combination of excellent resistance to alkaline fluids, superior tensile properties and compression set resistance, and excellent adhesion to metal substrates. Optionally, the fluoroelastomers may be dual cured by both a polyhydroxy system and an organic peroxide system. | 08-28-2008 |
20110319545 | PROCESS FOR PREPARING CURABLE PERFLUOROELASTOMER COMPOSITIONS - A non-black filled perfluoroelastomer composition comprising a) a perfluoroelastomer, b) 0.1-30 phr colloidal silica filler having an average particle size <100 nm, and c) a curative is made by 1) mixing an aqueous perfluoroelastomer dispersion with a sol of colloidal silica having an average particle size <100 nm, 2) isolating the perfluoroelastomer composition from the aqueous dispersion and 3) mixing the composition with curative. Cured compositions have surprisingly better compression set than do similar compounds containing hydrophilic silica. | 12-29-2011 |
20130066018 | CURABLE FLUOROELASTOMER COMPOSTION - Fluoroelastomer compositions comprising fluoroelastomers having copolymerized units of a nitrile group-containing cure site monomer are cured with certain hydroxylamine derivatives. The hydroxylamine derivative is of formula R | 03-14-2013 |
20130072636 | CURABLE FLUOROELASTOMER COMPOSITION - Fluoroelastomer compositions comprising fluoroelastomers having copolymerized units of a nitrile-containing cure site monomer are cured with certain hydrazide curatives. The hydrazide is of the general formula R | 03-21-2013 |
20130072643 | CURABLE FLUOROELASTOMER COMPOSITION - Fluoroelastomer compositions comprising fluoroelastomers having copolymerized units of a nitrile-containing cure site monomer are cured with certain carbazates. The carbazate is of the general formula R | 03-21-2013 |
20130072656 | CURABLE FLUOROELASTOMER COMPOSITION - Fluoroelastomer compositions comprising fluoroelastomers having copolymerized units of a nitrile-containing cure site monomer are cured with certain hydrazide curatives. The hydrazide is of the general formula R | 03-21-2013 |
20130158202 | PROCESS FOR MANUFACTURING FLUOROELASTOMER COMPOSITIONS CONTAINING FLUOROPLASTIC FIBRILS - Disclosed herein is a process for the manufacture of a fluoroelastomer composition containing fluoropolymer fibrils. The process comprises applying shear to a fluoroelastomer gum in a mixer while adding a liquid dispersion of fibrillatable fluoropolymer. | 06-20-2013 |
20130345365 | CURABLE FLUOROELASTOMER COMPOSITION - Fluoroelastomer compositions comprising fluoroelastomers having copolymerized units of a nitrile-containing cure site monomer are cured with certain phenol hydrazine complex curatives. | 12-26-2013 |
20140364571 | PROCESS FOR MANUFACTURING FLUOROELASTOMER COMPOSITIONS CONTAINING FLUOROPLASTIC FIBRILS - Disclosed herein is a process for the manufacture of a fluoroelastomer composition containing fluoropolymer fibrils. The process comprises applying shear to a fluoroelastomer gum in a mixer while adding a liquid dispersion of fibrillatable fluoropolymer. | 12-11-2014 |