Hollow microspheres used in high temperature powder coating

Posted by: FEIHONG Powders |on July 18, 2012

Hollow microspheres is a new functional fillers, Until Rrcent years, the characteristics of hollow microspheres were only found in the powder coating application and several well-known powder coating company has used it for mass production, customer feedback is very good.

The features is as followed:

The hollow microspheres is a thick hollow body with good fluidity,hardness of Ta Mok’s 5-7, and temperature resistant up to 1400 degrees, with the composition of the aluminum silicate it has excellent anti-corrosion to acid .

Added with hollow microspheres the flow properties of powder coating can be greatly improved,as well as with good flexibility,good feeling.Corrosion resistance and scratch resistance are significantly increased.By adding a certain amount it will have matte finish, can reduce the amount of matting agents greatly which reduce the cost .

The use rate of 5-15% is recommended,the following is the formulations and test data for high temperature powder coating,just for your reference:

Formula of high temperature powder coating(g)
Raw material	Ratio
Modified resin	500
Curing agent	26
Mica powder	160
Talcum powder	198
Hollow microspheres	150
Antifoaming agent	5
Flatting agent	8.5
high-temperature resistant pigment	24
Other additives	1.5

Performance Data
Testing items	Index
Appearance	Black, micro orange peel
Impact	35
Gloss (60)	33
Coating thickness	50um
Hardness	5H
Flexibility(mm)	4
Adhesion/grade	2
Heat resistance	Long time under 450C,short time under 400C No cracking, bubble, color change
Acid resistance(5%HCL)	300h no fading, bubble, ecclasis
Alkali resistance(5%NaOH)	300h no fading, bubble, ecclasis