Brucite B3SL and B3V Contrast Experiment

1. Introduction

Brucite is mineral form of magnesium hydroxide. It is currently recognized as an excellent flame retardant with three functions of flame retardant, smoke suppression and filling in the rubber and plastics industry. It is widely used in rubber, chemical, building materials, plastics and electronics, unsaturated polyester and paints, coatings and other polymer materials. Especially for mine air duct coating cloth, PVC whole core conveyor belt, flame retardant aluminum composite panel, flame retardant tarpaulin, PVC wire&cable material, mining cable sheath, cable accessory flame retardant, smoke and antistatic. It can replace aluminum hydroxide and has an excellent flame retardant effect. Magnesium hydroxide has better smoke suppression effect than similar inorganic flame retardants.

2. Test Preparation

2.1. Materials Preparation

Prepare the following materials:

Polyvinyl Chloride (PVC), DOP plasticizer , Calcium zinc stabilizer, calcium carbonate filler; Brucite B3SL, particle size of 2.5~3.5 μm. Brucite KMT B3V, particle size of 2.5-3.5 μm.

2.2. Test Machine

Pare the following machines:

Sample making: Banbury, Plate Curing Press; Mould; SY-6210-A Electronic Pulling Force Machine. Test: universal testing machine, melt flow tester, oxygen index meter.

2.3. Test Condition

Keep the test lab site temperature at 22.3-23.3 degrees Celsius and the humidity at 48-51%.

2.4. Samples Preparation

Preheat the Banbury to 100 °C-120 °C, the mixing time is 30 minutes, the mixing temperature is 200 ± 10 °C.

3. Test Result

Table 1 Basic technical data of two kinds of MDH

Brucite	Particle size (D50)	Mg(OH)₂	Coated or Not
B3SL	2.5-3.5μm	>=90%	Coated
B3V	2.5-3.5μm	>=90%	Coated

3.1. Differences of Elongation at Break

As shown in the Table 2, elongation of B3V is higher than that of B3SL.

Sample	Elongation at Break(%)
B3SL	315
B3V	325-330

3.2. Differences of Tensile Strength

From table 3, the tensile strength of B3SL is higher than that of B3V.

Sample	Tensile Strength(MPa)
B3SL	17.14
BB3V	16.2

3.3. Differences of MFI

Table 4 shows MFI of B3V is higher.

Sample	MFI(190℃.5KG) (g/10min)
B3SL	2.83
B3V	3.5

3.4. Differences of LOI

Table 5 shows LOI of B3V is higher.

Sample	LOI /%(1006.53.2mm)
B3SL	27.8
B3V	31.2

3.5. Differences of Density

Table 6 shows Density of B3SL is higher.

Sample	Density/g/cm³
B3SL	1.495
B3V	1.445

4. Conclusion

Table 7 KMT B3(PVC) and Ecopiren 3,5C comparison test

Formula	1	2
PVC SG3	100	100
DOP plasticizer	45	45
Calcium zinc stabilizer	5	5
Calcium carbonate filler	10	10
Test Conditions	22.8℃，50%	22.3-23.3℃，48-51%
MDH B3V	35
MDH B3SL		35
	Test result	Test result
Elongation at break(%)	325-330	315
Tensile Strength (MPa)	16.2	17.14
MFI(190℃.5KG) (g/10min)	3.5	2.83
LOI (100101mm)	31.2	27.8
Density/g/cm³	1.445	1.495

According to the above tests, B3V shows higher elongation at break, MFI and LOI.

Company Profile

KMT INDUSTRIAL HK LIMITED, headquartered in Gansu, China, research and manufacturer magnesium hydroxide, natural brucite powder and aluminum hydroxide.

kmtindustrial.com

Contact: robyn@kmtindustrial.com

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