Physical matting agent for exterior powder coatings T-302B
1.Description
T-302B is a non-wax containing and resin based matting agent designed for applying in exterior Polyester/TGIC powder coatings to provide low gloss of 10-30% at dosage 2-5%.This chemical system have excellent flow and surface fullness; high DOI suitable for black system; exhibit good stability without obvious various when over baking.
2.Typical physical data
|
Appearance |
Light yellow powder |
|
Soft range(℃) |
100-130 |
|
Solid content(%) |
>98 |
|
Bulk density(g/L) |
500-600 |
3.Suggested formula
|
Pure polyester（DSM4900、SJ-4ET）
|
550 |
|
Curing agent TGIC |
43 |
|
Matting agent T-302B |
45 |
|
Levelling agent T-988 |
10 |
|
Appearance modifiers T-402 |
5-10 |
|
Black Carbon |
7 |
|
Filler |
350 |
|
Curing condition:200℃×10-15min gloss：10-15% |
|
4.Characteristics
①T-302B combined with different polyester get gloss deviation, normally use polyester has lower reactivity, the finish gloss lower.Eg,( UCB441、 DSM4900、YE-7880、YZ9803、SJ4ET、ZF9336)
②Less amount of TGIC could be used,in order to obtain better mechanical properties, normally excess TGIC and T-302B ratio of about 10/1.
5.package and storage:
Packaging with PE lined Kraft paper bags, Net weight 25kg per bag. Store in cool and dry place to avoid moisture. According to our experience, the shelf life of this product is at least 2 years when ambient temperature below 30 ℃.
