PU Sealing Resin (CPU-42-BC30D-A/B)

Key feature

● Flame retardant UL-94-V0 (1.8mm)

● Solvent free (100% solid content)

● Hardness after curing: 28 Shore A

● Halogen free

● High transparency

● Great electrical characteristics

 

Application

CPU-42-BC30D-A/B are the transparent potting materials for sealing material between electrical device and housing. It can also be used to cast for other suitable products.

Characteristic

1.   Halogen free

2.   Flame retardant grade: UL-94-V0 (1.8mm)

3.   Soft grade and can absorb vibration

4.   Highly transparent sealing material

5.   Good at blocking moisture

6.   Great repairability

Advantage

1.  Solvent-free (100% solid content)

2.  Great electrical characteristics

3.  Low initial viscosity after mixing (The performance is compared to solvent-free two component casting resin)

4.  The reaction of mixture starts at room temperature (The reaction is speeded up at higher temperature)

Physical properties

Material data:

Item
CPU-42-BC30D-A
CPU-42-BC30D-B
Appearance
Light yellow liquid
Light yellow liquid
Density (g/cm3)
0.911 – 1.011
1.144 – 1.244
Viscosity (CPS/25℃)
570 – 930
20 – 180
Composition
Polyol
Modified polyisocyanate
Mixing ratio by weight
100
70

 

Hardness of finished product (Unit: Shore A) at room temperature (25℃)

1 day
2 days
3 days
7 days
Too soft to test
11
24
31

 

Parameters between temperature and curing time

Mixture at room temperature 17℃
CPU-42-BC30D-A/
CPU-42-BC30D-B
80℃ - 10 min
X
80℃ - 20 min
X
80℃ - 30 min
X
80℃ - 40 min
X
80℃ - 50 min
X
80℃ - 60 min
O

Surface is not dry: X

Surface is dry: O

Resin quantity: 35g

 

Unit: minute

Pot life (Viscosity increases to 50,000 cps)
70 – 80 min
Initial viscosity after casting at 25℃
Lower than 400 cps
Hardness after curing
28 Shore A

 

Flame retardant performance (UL-94) (sample size: 1.8mm)

CPU-42-BC30D-A/

CPU-42-BC30D-B

T1

Dripping

Combustion

T2

Dripping

Combustion

0

Yes

No

0

Yes

No

0

Yes

No

0

Yes

No

0

Yes

No

0

Yes

No

0

Yes

No

0

Yes

No

0

Yes

No

0

Yes

No

Post-combustion state

dropping

Yes

lump shedding

No

Carbon layer status

No

(dropping)

Flame retardant grade judged by TPUCO: UL-94-V0

Packaging

1kg and 18 Kg