Low Glass Transition Temperature Mercaptan Curing Agent
Thiol series are secondary distillation polythiol mercapto compounds, which have lower odor than conventional polythiols. It can be used in photo-curing systems to significantly improve the oxygen inhibition phenomenon under low-energy curing conditions. The polymerization inhibition of oxygen is mainly due to the formation of peroxyl radicals from free radicals and oxygen in the system, which slows down the chain growth reaction. The active hydrogen in mercaptans can react with peroxyl radicals, and new mercaptans are formed after hydrogen is abstracted.
The free radicals continue to participate in the addition reaction. It can significantly promote the adhesion, toughness and double bond conversion rate of the curing system. When tertiary amines are used as accelerators for epoxy curing agents, they can be quickly cured at low temperatures, enhance adhesion and tensile strength, and significantly improve heat and humidity resistance. The product's low glass transition temperature is suitable for use in some heat-sensitive materials, and it has excellent flexibility.
As for the epoxy curing agent, this product can be used as a DMP accelerator in the application of two-component epoxy curing quick-drying adhesives and can be cured at temperatures below -20°C for 1-5 minutes.
|
ITEM |
Tetrakis (3-mercaptobutyrate) pentaerythritol ester |
|
Model |
Thiol-30L |
|
Tg (℃) |
-20 |
|
Color, Gardner |
1 |
|
MW (GPC) |
545 |
|
Viscosity at 25℃, mPa.s |
1200 |
|
Refractive Index |
1.523 |
|
Specific Gravity |
1.28 |
|
Effective content |
99.5% |
UV curing glue
F&Q
F: Compared with other types of products, what are the characteristics of this type of product?
Q: The mercaptan curing agent cures very quickly in the presence of tertiary amines. The epoxy groups of the epoxy resin are quickly consumed within 1 to 2 hours of starting the reaction. Compared with polyamine curing epoxy resin, it takes 5 hours. about.
