AOC Palapreg H 851-02 Low Shrinkage Additive for Polymethyl Methacrylate SMC/BMC

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Low Shrinkage Additives for Polymethyl Methacrylate SMC/BMC
Palapreg? H 851-02 is a specially modified low profile additive for PMMA type SMC/BMC. The product has good resistance to water, weathering and heat.

Characteristic performance

high water resistance

weathering resistance

Excellent electrical properties

Thickening and stabilization

typical application

Palapreg? H 851-02 effectively reduces the high temperature evaporation of stearates and small molecules from the BMC and reduces fogging in headlight reflector products. The dense surface of the product also effectively prevents water molecules from eroding the product and meets the water resistance requirement.
Automotive products: BMC lamp reflector.
Water/weather resistant products: SMC/BMC products for outdoor use.

Product Indicators

performances	numerical value	unit (of measure)	Test Methods
exterior condition	clear - turbid	-	TM_2265
Viscosity @23℃	800-1300	%	TM_2033
Solids content, infrared drying	33-35	mPa-s	TM_2013

Typical Properties of Liquid Resins

performances	numerical value	unit (of measure)	Test Methods
flash point	33	°C	TM 2800
Storage period, no polymerization inhibitor, protected from light, 25°C	3	Months	-

SMC initial paste recommended formula

ingredient	numerical value
Palapreg? P 18-03	60
Palapreg? H 851-02	40
TBPB	1.5
Zinc stearate	4.5
CaCO3	180
MgO paste (35% content)	2.5

Mechanical properties of SMC molded products

performances	numerical value	unit (of measure)	Test Methods
intensity	1.8	g/cm3	DIN 53479
bending strength	180	MPa	ISO 178
Bending modulus of elasticity	12500	MPa	ISO 178
impact strength	90	KJ/m2	ISO 179
External Glass Fiber Strain	2.4	%	ISO 178
Coefficient of linear expansion (0-60°C)	18x10-?	K-1	DIN 53752/A
Glass fiber content	30	%	-

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