配方类型:

ADHESIVES

配方说明:

Sealant, Non-sagging

配方组成:

Calcium carbonate (wet ground)/20.0
Stearic acid/1.0
PART B
Mix together following first two components
Accelerator (lead peroxide in DBT)/15.0
Epoxy tackifier/5.0
Titanium dioxide/10.0
Polysulfide resin/100.0
"Cab-O-Sil M-5
Ethylene glycol/1.2
"Cab-O-Sil" M-5/1.2
Sulfur/0.1
Ethylene glycol/0.3
"Triton" X-100/0.2

配制方法:

A nonsagging polysulfide sealant containing a phenolic tackifier can be prepared with 1.2 phr "Cab-o-sil" M-5 and 0.3% ethylene glycol dispersed in the resin. Excellent shelf stability and nonsagging properties during pot life can be obtained with this formulation. Since phenolic tackifiers stain masonry, epoxy tackifiers or other substitutes are often used.
When an epoxy tackifier is used in the formulation, it is added to the accelerator portion. In this formulation 1.6 phr "Cab-o-sil" M-5, 0.2% ethylene glycol, and 0.2% "Triton" X-100 is needed to produce a shelf stable sealant composition.