Unsaturated Polyester Resin

DS-721-9

DS-Tianhe Resin Series

Tianhe Dingshi brand DS-721-9 is a phthalic type unsaturated polyester resin, featuring low viscosity and high reactivity, good toughness, and excellent mechanical strength, suitable for manufacturing artificial quartz stone slabs.

Liquid Resin Technical Specifications
Item	Unit	Specification	Testing Standard
Appearance		Viscous Liquid	Visual
Acid Value	mgKOH/g	19-23	GB2895
Viscosity (25℃)	mPa.S	700-900	GB7193
Gel Time	min	6-8	GB7193
Solid Content	%	65-68	GB7193
80℃ Stability	h	≥24	GB7193
Note: Gel time is measured by adding 0.5ml of cobalt octoate solution and 0.5ml of MEKP solution to 50g of resin in a 25℃ air bath.

Resin Casting Body Performance Indicators
Item	Unit	Specification	Testing Standard
Barcol Hardness	Barcol	34	GB3854
Tensile Strength	MPa	60	GB2567
Tensile Elastic Modulus	MPa	2800	GB2567
Break Elongation	%	8.0	GB2567
Bending Strength	MPa	75	GB2567
Bending Elastic Modulus	MPa	3000	GB2567
Impact Toughness	KJ/m²	12.0	GB2567
Heat Distortion Temperature	℃	56	GB1634.2
Note: Experimental environment temperature is 23±2℃ with relative humidity of 50±5%.

Packaging and Storage

The packaging for Tianhe Dingshi brand DS-721-9 is a net weight of 220KG metal drum, with a storage period of six months at 20℃. Higher temperatures will shorten the storage period accordingly. It should be stored in a cool, ventilated place, avoiding direct sunlight and keeping away from heat sources. This product is flammable and should be kept away from open flames.

Note: This data is determined according to national standards (GB). Due to various factors affecting the processing process, it does not exclude the necessity for users to conduct their own experimental research. Legally, it does not guarantee that certain performance characteristics of the product are fully applicable to any specific use, and reserves the right to modify the information.

Key words:

725

721-4X

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Shanghai Xintianhe Resin Co., Ltd.

Address: Room 502, Building 23, Science and Technology Oasis, 1999 Yishan Road, Minhang District, Shanghai

National unified hotline: 400-820-9698

Telephone: 86-21-57485068 / +86 13917508287 (Sales Department)

E-mail: service@chinaresins.com

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