PU Sealing Resin (CPU-42-BC30A-A/B)

Key feature

● Flame retardant UL-94-V2 (1.8mm)

● Solvent free (100% solid content)

● Hardness after curing: 31 Shore A

● Halogen free

● High transparency

● Great electrical characteristics

Application

CPU-42-BC30A-A/B is 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-V2 (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-BC30A-A

CPU-42-BC30A-B

Appearance

Light yellow liquid

Light yellow liquid

Density (g/cm3)

0.912 – 1.012

1.005 – 1.105

Viscosity (CPS/25℃)

550 – 910

280 – 440

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

28

31

31

31

 

Parameters between temperature and curing time

Mixture at room temperature 17℃

CPU-42-BC30A-A/CPU-42-BC30A-B

80℃ - 10 min

X

80℃ - 20 min

X

80℃ - 30 min

X

80℃ - 40 min

O

Surface is not dry: X

Surface is dry: O

Resin quantity: 35g

 

Unit: minute

Pot life (Viscosity increases to 50,000 cps)
35 – 45 min
Initial viscosity after casting at 25℃
1,000 cps
Hardness after curing
31 Shore A

 

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

CPU-42-BC30A-A/

CPU-42-BC30A-B

T1

Dripping

Combustion

T2

Dripping

Combustion

0

Yes

Yes

0

Yes

Yes

0

Yes

Yes

0

Yes

Yes

0

Yes

Yes

0

Yes

Yes

0

Yes

Yes

0

Yes

Yes

0

Yes

Yes

0

Yes

Yes

Post-combustion state

dropping

Yes

lump shedding

No

Carbon layer status

No

(dropping)

Flame retardant grade judged by TPUCO: UL-94-V2

Packaging

1kg and 18 Kg