Encapsulation and Potting

Encapsulation, or potting, is the process of pouring resins – epoxies, silicones, urethanes, hybrids – into cavities containing electronic components to insulate and hold them in place while providing protection from shock and vibration. 

For example, sensitive components on PCBs require protection against external factors such as humidity, dust and chemicals.

LED assemblies, exposed to UV radiation or heat, require potting compounds as well.

PROTAVIC has developed a range of cyanate ester-based liquid resins which outperform the thermal resistance of current silicone and epoxy resins while ensuring very low CTE and strong adhesion to various substrates.

Some examples are listed in the following table.

Technical description

Name名称

Color颜色

Chemistry

Density

Viescosity at 25°C(mPa.s)

Glass transition temperature(TG)

CTE(ppm/°C)

Shore hardness

Open time

Polymerization/Crosslinking

Storage

PROTAVIC® PNA 90311

colorless

Acrylate

1.1

250

-

160

D60

3 months

30 sec at 120 mW/cm² UV A + 2 min at 100°C

3 months at 25°C

PROTAVIC® PNC 20014

Yellow

Cyanate ester

1.7

120000

265°C

22

D96

24 hours

30 min at 150°C + 30 min at 190°C

30 min at 150°C + 30 min at 190°C

PROTAVIC® PNE 30284

Black

Epoxy

1.84

25000

160°C

21

D94

24 hours

3 hours at 160°C

6 months at 25°C

PROTAVIC® PNA 90311

colorless

Acrylate

Chemistry

1.1

Density

250

Viescosity at 25°C(mPa.s)

-

Glass transition temperature(TG)

160

CTE(ppm/°C)

D60

Shore hardness

3 months

Open time

30 sec at 120 mW/cm² UV A + 2 min at 100°C

Polymerization/Crosslinking

3 months at 25°C

Storage

PROTAVIC® PNC 20014

Yellow

Cyanate ester

Chemistry

1.7

Density

120000

Viescosity at 25°C(mPa.s)

265°C

Glass transition temperature(TG)

22

CTE(ppm/°C)

D96

Shore hardness

24 hours

Open time

30 min at 150°C + 30 min at 190°C

Polymerization/Crosslinking

30 min at 150°C + 30 min at 190°C

Storage

PROTAVIC® PNE 30284

Black

Epoxy

Chemistry

1.84

Density

25000

Viescosity at 25°C(mPa.s)

160°C

Glass transition temperature(TG)

21

CTE(ppm/°C)

D94

Shore hardness

24 hours

Open time

3 hours at 160°C

Polymerization/Crosslinking

6 months at 25°C

Storage