Silane cross-linkers for polysiloxanes

Details Silane cross-linkers for polysiloxanes Silane cross-linkers for polysiloxanes

C - Chemistry, Metallurgy

07

F

260/447, 260/446

C07F 7/02 (2006.01) C07F 7/04 (2006.01) C07F 7/18 (2006.01) C08L 83/04 (2006.01)

Patent

CA 1211459

-1- SILANE CROSS-LINKERS FOR POLYSILOXANES Abstract of the Disclosure This invention relates to silanes of the general formula RnSi(OcR?COZR)4-n where R represents the same or different monovalent hydrocarbon radicals or substituted monovalent hydrocarbon radicals, R1 is hydrogen or the same as R, Z is oxygen or the group Image , where R1 is the same as above, n is 0 or 1 and oligomers thereof. These silanes are prepared by reacting silanes of the general formula RnSiX4-n where R and n are the same as above and X represents the same or different hydrolyzable atoms or condensable groups other than RCOCR?CO groups, with alpha-hydroxycarboxylic acid esters or amides. The silanes, which have at least three condensable groups per molecule, may be mixed with a diorganopolysiloxane containing terminal condensable groups and at least one addi- tional substance to prepare compositions which are storage- stable under anhydrous conditions, but crosslink when exposed to moisture at room temperature to form elastomers.

419224

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