Brief introduction of silicone sealant

2017-10-12

Room temperature vulcanized silicone sealant is made of base polymer with cross linking agent, catalyst, filler and other additives after mixing in a moisture-tight mixer, and then packaged in cartridge or foil sausage. It will cross-linked sulphur and form an elastomer after being exposure to moisture in the air when it is extruded from the packing. It has excellent performance between -100℃ and 315℃, it’s much better then other any other elastomer in this aspect. Weather resistance and aging resistance are its key features. What’s more, it also has any other excellent performance, such as Electrical insulation, hydrophobicity, anti-sticking and biochemical compatibility and so on. It’s ta popular elastomer in various fields.

According to the product packaging, room temperature vulcanized silicone sealant can be divided into one component and two components. According to type of cross linking system, it can be divided into diabetic type, ketone oxime type, dealcoholization, deacetone and de-amide type. The advantage and disadvantage of they are as follow:

classification	Advantage	disadvantage
diabetic type	Good at Strength, transparency, adhesion. Speed of vulcanization is fast.	Smells of acetic acid. Corrosive to metals
ketone oxime type	Not too much smell Good adhesion to various materials.	Slightly corrosive to copper
Dealcoholization type	No smell. No corrosive.	Speed of vulcanization is slow. Poor preservation. Adhesive is slightly worse
Deacetone type	Odorless, non-toxic. Speed of vulcanization is fast. Good at preservation, operability, sealing, heat resistance.	high cost
de-amide type	Odorless, non-toxic, low modulus	Adhesive is slightly worse

genotype		Application range	feature
diabetic type	General purpose	Glass joints, grid gap, glass suspension, glass sink	High modulus, transparent, fast curing,frowziness ,corrosive to copper and iron
	High grade transparent	Built-in glass (showcase, window). Required transparent seams
	mould proof	Seal of bathroom ,ceiling, toilets, sanitary ware.
	structure sealing	SSG construction method*
ketone oxime type	General purpose	Glass joints, grid gap, metal joints. Assembly of residential, tile, ceramic tile, stone bonding	High modulus, curing speed is medium, corrosive to copper
	mould proof	Seal of bathroom ,ceiling, toilets, sanitary ware.
	inflaming retarding	Seal of the gap in the fire zone
Dealcoholization type	General purpose	Joint seam of Polycarbonate, plexiglass and other transparent plastic, glass, copper and any other metal that is easy to corrode	no causticity
Dealcoholization type	structure sealing	SSG construction method, glass curtain construction method	no causticity
Deacetone type	General purpose	Glass joints, slit sash, siding, railings and other sealing gap. Filling seal of highway, bridge, airport concrete pavement expansion joints.	Low modulus, opaque, slow curing, slightly odorous, non-corrosive
de-amide type	General purpose	Glass joints, slit sash, siding, railings and any other sealing gap. Large sink.	Low modulus, opaque, slow curing, slightly odorous, non-corrosive