Polyepoxysilanes

• Main Author: ECKBERG, RICHARD PAUL
• Format: Patent
• Language: English; French; German
• Published: 12.01.1994
• Edition: 5
• Subjects: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS THEREFOR; WOODSTAINS

Polyepoxy silane compositions resulting from the reaction of olefinepoxide and poly(H)silanes crosslink in the presence of a catalytic amount of an 'onium catalyst when exposed to UV light. In one embodiment, two moles of an olefin-containing epoxy monomer are reacted with a bis(H)-containing silane of general formula R2SiH2. Important to the success of this process is that RhCl3.xH2O is capable of catalyzing the hydrosilation addition of 2 moles of olefin to R2SiH2. The resulting diepoxysilanes are reactive monomers which undergo photopolymerization when exposed to ultraviolet light in the presence of iodonium photocatalysts.