Condensation Curing Silicone Sealant Formulation Guide

		OH Polymer		Silane Crosslinkers
		Silane Adhesion Promoters		Silane Coupling Agents
		Fumed Silica		Tin Catalysts
		Plasticizers		Water Scavengers

Silane Crosslinkers

SiSiB SILANES has been developing and producing crosslinkers and coupling agents for the sealant industry for over 28 years, supplying world markets with a successful range of innovative products.

	Acetoxy Silane Crosslinker		Oximino Silane Crosslinker		Alkoxy Silane Crosslinker
	SiSiB® PC7930 MTA		SiSiB® PC7130 MOS		SiSiB® PC5131 MTMS
	SiSiB® PC7950 ETA		SiSiB® PC7500 VOS		SiSiB® PC5132 MTES
	SiSiB® PC7960 VTA		SiSiB® PC7400 TOS		SiSiB® PC5420 TEOS
	SiSiB® PC7970 PTA		SiSiB® PC7600 POS		SiSiB® PC5424 TEOS-40
			SiSiB® PC7133 Methyl MIBKO Silane		SiSiB® PC5430 TPOS
			SiSiB® PC7530 Vinyl MIBKO Silane		SiSiB® PC6110 VTMO
			SiSiB® PC7410 Tetra MIBKO silane		SiSiB® PC6151 Enoxy
			SiSiB® PC7131 Methyl Acetoxime Silane		SiSiB® PC8151 Enoxy
			SiSiB® PC7531 Vinyl Acetoxime Silane

Since in Europe MEKO releasing sealants are under a lot of pressure, more and more customer are looking for low MEKO crosslinkers. Probably in 2017 MEKO releasing sealants will be banned from the European market for a big part.As a solution, now we are producing Acetoxime & Methyl Isobutyl Ketoxime based crosslinkers, like our PC7131, PC7133, PC7530, PC7531 etc.

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:

SiSiB® SILANES 2016	SiSiB® SILICONES 2016
SiSiB® FUMED SILICA	SiSiB® SILICONE RUBBER 2016
SiSiB® Silicones for Textile	SiSiB® SILANE DONORS
SiSiB® Silicones Water Repellents	SiSiB® Silicones for Personal Care
SiSiB® Silicone PU Additives	SiSiB® Silicone Coating Additives
SiSiB® Silicone Masterbatch for Plastic	SiSiB® STP (Silane Terminated Polymer)
SiSiB® Silane Crosslinkers	SiSiB® Silane Coupling Agents