Silane Crosslinking Agents
”Silane technology consists of two steps: Step 1: incorporation of the silane into the polymer, either by grafting of vinylsilane onto the polymer backbone or by copolymerization of vinylsilane with ethylene in the Step 2: crosslinking in the presence of water, generally catalyzed by tin compounds or other suitable catalysts. This second step can be controlled and made during or after the extrusion process. This is the difference between a One-Step and a Two-Step Process.The use of silanes results in a more flexible and more economical process for crosslinking. Silane crosslinked polyolefins are linked through an Si-O-Si moiety instead of the C-to-C bond created via peroxide or radiation cure. Siloxane bridges are less rigid than C-to-C bonds and give flexibility to the crosslinked polymer, as shown in the figure below.”(http://www.specialchem4polymers.com/tc/silane-crosslinking-agents/index.aspx?id=mechanism 1/10/2009)
Recent US Patents
To go to the text version of the patent, click on US Patent Number Search and enter the patent number in the search box. 7/14/2009 7,560,145 Curing agent, curable compositions, compositions for optical materials, optical materials, their production and liquid crystal displays and LED's made by using the materials 3/31/2009 7,511,100 Process for the production of crosslinked polymer employing low VOC-producing silane crosslinker and resulting crosslinked polymer 8/26/2008 7,417,105 Crosslinkable silane-terminated polymer and sealant composition made with same
Recent Journal Articles
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Review Articles
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Editor's Notes
As the literature is reviewed, and items of interest concerning this topic are found. These may be added in an abbreviated form with the reference. Readers and contributors are invited to add their own notes. Contributors may add them directly and other readers can simply send their notes to the editor, Roger Corneliussen at rcorneliussen@4spe.org. He may edit and add them to this page at his discretion.