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Fast curing two-component condensation liquid silicone rubber

X-31-2835-A/B

X-31-2835-A/B cure faster than conventional condensation liquid silicone rubber.
This product bonds well a variety of materials without cure inhibition by sulfer, phosphorous, nitrogen compounds and so on.

Features

  • Shortened curing time
  • Without heating process
  • Easy to combine liquid A and B
  • Not inhibit curing for condensation type

Change in hardness and tensile strength

Change in hardness and tensile strength

General Properties

Parameter Product name X-31-2835-A/B

By-product gas

 Alcohol

Before curing

Consistensy

 Liquid

Appearance

 A: milky white/B: milky white

Viscosity at 23°C　Rotation 10s-1

Pa·s		 38/30

Blend ratio

 100 : 100

Pot life

min		 9

Standard curing condition    23°C ± 2°C/50 ± 5% RH × 1 day

After curing

Density at 23°C

g/cm3		 1.02

Hardness  Durometer A

 32

Tensile strength

MPa		 1.1

Elongation at break

%		 150

Volume resistivity

TΩ・m		 79

Dielectric breakdown strength

kV/mm		 28

Relative permittivity  50Hz

 2.8

Dissipation factor  50Hz

 4.3 × 10‒4

Lap shear strength (Al/Al)

MPa		 0.3

Low-molecular-weight siloxane content
∑D3-D10

ppm		 300 ≥
(Not specified values)

Comparison of conventional product

Parameter Product name X-31-2835-A/B Two-component condensation-cure
Conventional product		 Two-component addition-cure
Conventional product

Room temperature 1 day

Lap shear strength

MPa		 PBT 0.2 (80)* 0.1 (0)* 2.2 (100)*
Al 0.3 (100)* 1.1 (100)* 2.4 (100)*

Hardness  Durometer A

 32 35 20

Room temperature 3 days +
120°C × 1 h

Hardness  Durometer A

 32 35 32

Curing inhibitors

Butyl rubber sheet (sulfer)

 Not inhibit curing Not inhibit curing Inhibit curing

Addition of amine
(nitrogen compound)

 Not inhibit curing Not inhibit curing Inhibit curing
(Not specified values)

* Values in parentheses: cohesive failure rate

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