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TP91 Epoxy Hardener (Similar to Estron G91)
Description
Epoxy Hardener TP91 is an imidazole type of curing agent for epoxy-based powder coatings. Coatings cured with TP91 show excellent chemical resistance, mechanical properties and the capability for low temperature cure.
Technical Parameters
Item |
Test Method |
Specifications |
Appearance |
Visualization |
Tan to Brown Granules |
Specific Gravity (25/25) |
GB/T617-2006 |
1.1 – 1.2 |
Melting Range（℃） |
Ring & Ball |
92 -105 |
Dosage
3 -6 parts per 100 parts of Epoxy Resin
Results from Powder Coating Evaluations
Epoxy Hardener Used |
Epoxy Hardener TP91 |
Epoxy Hardener TP91 |
Epoxy Hardener G92 |
Chemistry Composition |
Modified Imidazole |
Modified Imidazole |
Accelerated Phenolic |
Ratio of Epoxy to Hardener |
100:3 |
100:5 |
75:25 |
Gel time, Seconds at 200℃ |
75 |
50 |
35 |
Fastest Cure time at 200℃ |
3mins |
2mins |
3mins |
Lowest Cure Cycle for 30mins |
120℃ |
110℃ |
120℃ |
Yellowing |
Tends to yellow at higher bake temp |
More tendency to yellow |
Remains white |
Application
High gloss epoxy powder coatings based on this hardener can be cured at temperatures ranging from 200°C to 110°C.The powder coating formulator has flexibility in assigning cure schedule profiles for various substrates such as composites or MDF since the physical film properties are not affected by cure temperature.
Package & Storage & Handling
1. Available in polyethylene-lined, multi-ply paper bags, N.W. 25KG/Bag.
2. Store in a cool and dry place to avoid contacting other chemical products. Seal after use. Please wear dustproof mask and glove when operating.
3. Validity will be 1 year under normal temperature.
