Specifications 1.Orthophthalic

2.High regidity

3.Good mechanical property

4.Medium viscosity and higher reaction activity

? ? DS-727 is an orthophthalic type unsaturated polyester resin with medium viscosity, high reactivity, good toughness, and excellent mechanical intensity, applicable to the manufacture of artificial marbles, sanitary wares etc. ? ?

Technical Indexes of Liquid Resin
Item	Unit	Value	Standard
Appearance	?	Transparent Sticky Thick Liquid	Visual ?
Chroma (Pt-Co)	?	25-35	?
Acid Value	mgKOH/g	19-22	GB2895-82
Viscosity(25°C)	mPa.S	650-850	GB7193.1-87
Gel Time	min	5-8	GB7193.6-87
Non-Volatile	%	67-69	GB7193.3-87
Note: Gel Time is 25°C; in air bath, 0.4 ml cobalt isocaprylate solution and 0.4 ml MEKP solution were added into 50 g resin.

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Performance Indexes of Resin Casting Substance
ItemItem	Unit	Value	Standard
Barcol hardness? ≥	Barcol	38	GB3854-1983
Tensile strength ≥	MPa	65	GB2568-1985
Tensile modulus ≥	MPa	3000	GB2568-1995
Elongation at break≥	%	6.0	GB2568-1995
Flexural strength ≥	MPa	80	GB2570-1995
Flexural modulus≥	MPa	3100	GB2570-1995
Impact strength ≥	KJ/m2	7.0	GB2571-1995
H.D.T ≥	°C	60	GB1634-1989
Note: Environmental Temperature for Experiment: 23±2°C; relative humidity: 50±5%

? Packing and Storing DS-727: Packed in metal pail of 220 KG net weight with shelf life of 6 months at 20°C at ventilated places; avoiding direct sunlight and heat or fire. Note: The data were tested according to GB standard. Influenced by many factors in the process of fabrication, necessary researches by user are not exclusive. Legally, no warranties for some performances of product are applicable to one specific use, and the rights to amend the materials are reserved. ?