Black SP297 Thermal conductivity 2K polyurethane potting and sealing adhesive for electronic transformers and electrical items
SP297 is a solvent-free, High-performance two-component polyurethane potting compound.
The resin part (Part A) contains hydroxyl groups, and the curing agent (Part B) is based on isocyanate. They were mixing A and B cures to form an elastomer without any significant volume change.
The product can be cured between 15-65 degrees without bubbles, has high volume resistivity, and has flame retardant grade UL94 V-0.
Mixture ratio: AB=100:15 (Mass ratio)
Thermal conductivity 0.64 W/m.k
Glass transition temperature 10 Tg (ºC)
1. Comply with ROSH and REACH.
2. Thermal conductivity, flame retardant, CTI value ≥ 600;
3. Curing method: room temperature curing or 65ºC-30min for complete curing.
1. Filling, coating, casting, good bonding between metal and plastic;
2. Communication equipment, transformers, control power supplies, ignition controllers, electronic sensors, etc.
3. Charging pile potting, potting of small and medium-sized electronic components, such as sensors, LED waterproof power supplies, mutual inductors, etc.
| Specification of Part-A (resin) |
| Items |
Standard |
Specification |
Typical value |
| Colour |
Visual |
Black |
Black |
| Viscosity (mPa.s) |
GB/T 2794 |
7500 ± 1500 |
7500 |
| Density (g/cm3) |
GB/T 13354 |
1.50 ± 0.10 |
1.47 |
| Specification of Part-B (hardener) |
| Items |
Standard |
Specification |
Typical value |
| Colour |
Visual |
Dark Brown |
Dark Brown |
| Viscosity (mPa.s) |
GB/T 2794 |
100 ± 20 |
95 |
| Density (g/cm3) |
GB/T 13354 |
1.20 ± 0.10 |
1.20 |
| Specification after being mixed |
| Items |
Standard |
Specification |
Typical value |
| Mixing ratio |
By weight |
A:B=100:15 |
A:B=100:15 |
| Colour |
Visual |
Black |
Black |
| Viscosity (mPa.s) |
GB/T 2794 |
2500 ± 1000 |
1800 |
| Density (g/cm3) |
GB/T 13354 |
1.40 ± 0.10 |
1.35 |
| Operation time |
/ |
25 ± 5 |
25 |
| Pot life (25 ºC/min) |
/ |
50 ± 10 |
40 |
| Curing speed |
40g at room temperature |
40g/24h |
40g/24h |
| 60g / heating up |
65ºC/30min |
Completely cured |
| Specification after being cured |
| Items |
Standard |
Specification |
Typical value |
| Solid content |
GB/T 2793 |
≥ 99 |
99.5 |
| Hardness Shore A |
GB/T 531.1 |
85 ± 5 |
82 |
| Tensile strength (MPa) |
GB/T 528 |
> 4 |
5 |
| Elongation (%) |
GB/T 528 |
≥ 60 |
65 |
| Dielectric strength (kV/mm) |
GB/T 1695 |
> 20 |
21 |
Dielectric constant
(100KHz, 25ºC) |
GB/T 1693 |
> 3 |
4.64 |
| Loss factor (100KHz, 25ºC) |
GB/T 1693 |
/ |
0.1 |
| Glass transition temperature Tg (ºC) |
GB/T 11998 |
/ |
10 |
Expansion coefficient
(-100 to 150ºC) (μm/mºC) |
ISO11359 |
/ |
125 |
| Volume Resistivity (Ωcm) |
ASTM D 257 |
≥ 1014 |
3.7* 1014 |
| Thermally conductivity (W/m·K) |
ASTM D 5470 |
≥ 0.6 |
0.64 |
| CTI (V) |
GBT 4207 |
≥ 600 |
≥ 600 |
Water absorption rate
(24H, 25ºC, %) |
GB/T 8810 |
< 0.2 |
0.13 |
| Flammability |
ANSI/UL-94 |
V-0 |
V-0 |
| Service temperature (ºC) |
/ |
-50 to 150 |
/ |
Thermal impedance and thermal resistance data:
| Specification |
Unit |
Sample thickness |
Typical value |
| Thermal impedance |
K*cm2/W |
1.781mm |
34.9487 |
| Thermal resistance |
K/W |
4.9405 |
| Thermal impedance |
K*cm2/W |
3.893mm |
58.2561 |
| Thermal resistance |
K/W |
8.5318 |
| Thermal impedance |
K*cm2/W |
6.623mm |
72.7579 |
| Thermal resistance |
K/W |
10.4160 |
Manual mixing process (230g mixing volume)
1. Preheating: AB components in at low temperature, the viscosity will become high, it is recommended to preheat to 20 ~ 25 ºC, easy to use.
2. Mixing: Weigh the components A and B according to the proportion, mixing vertical stirring rod, clockwise (or counterclockwise) in the same direction and rapid mixing for 3 minutes, 110-120 circles/min, pay attention to the bottom of the container, the edge of the
The department should be stirred evenly, otherwise, there will be a localized phenomenon of non-curing.
3. Potting: Pour the mixed products into the device (Note: 2-3 minutes to fill the product with glue), if the product has a complex structure and large volume, it should be potted in stages.
After using
After using
The operating container will be cleaned before use. Mixing the main agent and stiffening agent, With the different kinds of stiffening agents and quantity. The process should be completed as soon as possible.
Package specification:
PART A: 25KG per bucket
PART B: 3.75KG per bucket
|
Storage:
Shelf life: 6 months in unopened packaging in a cool and dry storage place at temperatures between +8ºC to + 28ºC.
|
Transportation:
Moisture-proof, rainproof, sunproof, high-temperature roof, keep away from heat sources, handle with care, and do not squeeze or collide.
|
SEPNA is committed to the research, development, and production of advanced new materials. The products are centered around MS polymer, epoxy resins, polyurethane, the formation of new energy, high-end assembly, and electronic adhesives three major series of products.
Focus on the core business, focusing on providing customers with more suitable and more secure "bonding, sealing, protection" new materials.
Mainly for new energy vehicles, energy storage and elevators, electronics, modified vehicle manufacturing, and other areas of domestic and
foreign customers to provide a series of differentiated and refined new materials products and integrated solutions.
Our factory adopts an ERP automated quality control system, and a full-process ERP management system, and has passed IATF16949, ISO 9001, ISO14001, and ISO45001 system certifications.
1. Outstanding manufacturers and powerful factories.
2. OEM / ODM AVAILABLE (Professional design team providing package design solutions for OEM / ODM customers free of charge.
3. Free Samples.
4. Imported Raw Materials and Test Equipment.
5. Strict quality control (We have passed GB/T 19001-2016, IS09001:2015, and IATF 16949:2016 quality system authentication, and we can provide ROHS/SGS/ MSDS certification of products).
6. Deliver in 7-15 Days after payment.
7. Excellent QC Team and R&D Team.
8. Provide professional application technology solutions.
9. Complete the after-sales service system.
10. Partners with Top 500 Global Companies.
Sepna's products have been widely used in the international market, mainly in North America, South America, Asia, Southeast Asia the Middle East, Oceania, etc.
Until now, she has serviced nearly 1000 enterprises all over the world.
| Our customers and Exhibition |
Samples: Express ( FedEx, DHL, TNT, UPS, etc.)
Cargo: By Sea ( FCL / LCL), By Air, By Railway, By truck, etc.
Q1. How to get an accurate quotation from us?
A1. Please provide your requirements, product specifications, quantity, and trade terms.
Q2. Can you provide OEM service?
A2.Yes.Private labeling service is available
Q3. How to be SEPNA's distributor?
A3.As the growing of Sepna's global business, we need to find more and more distributors and agents
worldwide. SEPNA will provide the best solution and service for our partners.
For more information, pls contact our salesperson or call us:+86-400-882-1323
Q4. Can I get a sample?
A4. Yes. We offer free samples
Q5. What is your product's shelf life?
A5.9 months when stored in cool dry and well-ventilated areas under 25ºC.
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