SILANE CROSSLINKERS | SILANE CROSSLINKING AGENTS

SiSiB SILANES has been developing and producing crosslinkers and coupling agents for the sealant industry for over twenty-five years, supplying world markets with a successful range of innovative products.

The crosslinking agent used in RTV silicone systems consists of a species that can be represented as R-Si-X3 (typically used in one component systems) or Si-X4 (typically used in two component systems). The R is an organic group such as a methyl, ethyl, or vinyl, and the X is a moisture hydrolysable group. A simplified cure mechanism for a one-component silicone RTV sealant is shown in below:

Figure A: Reaction of crosslinker with polymer ends:

Figure B: Reaction of crosslinker-capped polymer end with moisture:

Figure C: Reaction of resultant polymer end with another polymer: