China 2022 China New Design Liquid Epoxy Resin - Unsaturated Polyester Resin Manufacturers – Dujiang factory and manufacturers

2022 China New Design Liquid Epoxy Resin - Unsaturated Polyester Resin Manufacturers – Dujiang

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2022 China New Design Liquid Epoxy Resin - Unsaturated Polyester Resin Manufacturers – Dujiang Detail:

PROPERTY

•7937 resin polyester resin with medium reactivity
•Moderate temperature peak, high strength, shrinkage, good toughness

APPLICATION

•It is suitable for solidifying quartz stone at room temperature and medium temperature.,ect

QUALITY INDEX

ITEM	Range	Unit	Test Method
Appearance	Light yellow
Acidity	15-21	mgKOH/g	GB/T 2895-2008
Viscosity, cps 25℃	0.65-0.75	Pa. s	GB/T 2895-2008
Gel time, min 25℃	4.5-9.5	min	GB/T 2895-2008
Solid content, %	63-69	%	GB/T 2895-2008
Thermal stability, 80℃	≥24	h	GB/T 2895-2008
color	≤70	Pt-Co	GB/T7193.7-1992

Tips: Detection of Gelation Time: 25°C water bath, 50g resin with 0.9g T-8m ( L % CO) and 0.9g M-50 (Akzo-Nobel)

MEMO: If you have special requirements of the curing characteristics, please contact our technical center

MECHANICAL PROPERTY OF CASTING

ITEM	Range	Unit	Test Method
Barcol hardness	35		GB/T 3854-2005
Heat Distortion temperature	48	°C	GB/T 1634-2004
Elongation at break	4.5	%	GB/T 2567-2008
Tensile strength	55	MPa	GB/T 2567-2008
Tensile modulus	3300	MPa	GB/T 2567-2008
Flexural Strength	100	MPa	GB/T 2567-2008
Flexural modulus	3300	MPa	GB/T 2567-2008
Impact strength	7	KJ/㎡	GB/T2567-2008

MEMO: Performance standard: GB/T8237-2005

PACKING AND STORAGE

• The product should be packed into clean, dry, safe and sealed container, net weight 220 Kg.
• Shelf life: 6 months below 25℃, stored in cool and well
ventilated place.
• Any special packing requirement, please contact our support team

NOTE

• All information in this catalog is based on GB/T8237-2005 standard tests, only for reference; maybe differ from the actual test data.
• In the production process of using resin products, because the performance of user products is affected by multiple factors, it is necessary for users to test themselves before selecting and using resin products.
• Unsaturated polyester resins are unstable and should be stored below 25°C in a cool shade, conveyance in refrigeration car or in nighttime, averting from sunshine.
•Any unsuitable condition of storage and conveyance will cause the shortening of shelf life.

INSTRUCTION

• 7937 resin does not contain wax, accelerator and thixotropic additives.
• 7937 resin is suitable for curing at room temperature and medium temperature. Medium temperature curing is more conducive to production control and product performance assurance. Recommended for medium temperature curing system: tert-butyl peroxide isooctanoate TBPO (content ≥97%), 1% resin content; curing temperature, 80±5℃, curing not less than 2.5 hours. Recommended coupling agent: γ-methacryloxypropyl trimethoxysilane KH-570, 2% resin content.
• 7937 resin has wide applicability; it is recommended to choose 7982 resin or o-phenylene-neopentyl glycol 7964L resin with higher performance requirements; it is recommended to choose m-phenylene-neopentyl glycol 7510 for higher water resistance, heat resistance and weather resistance. Resin; if the equipment can meet the requirements, please choose low-viscosity isophthalic 7520 resin, which is more economical and has better performance.
• In the production process of the product, after heating and curing, it should be steadily lowered to room temperature, to avoid rapid cooling, to prevent product deformation or cracking, especially in winter. The cutting and polishing of quartz stone in the production process should be carried out after sufficient post-curing.
• The moisture absorption of the filler should be avoided. Excessive moisture content will affect the curing of the product and cause performance degradation.

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