LINQBOND SO-191GL | Moisture Curing Modified Silicone Adhesive

Harmonization Code : 3506.91.90.99 |   Prepared glues and other prepared adhesives, not elsewhere specified or included; products suitable for use as glues or adhesives, put up for retail sale as glues or adhesives, not exceeding a net weight of 1 kg ; Adhesives based on polymers of headings 3901 to 3913 or on rubber; Other ; Other
Main features
  • One-component
  • Fast cure at low temperature
  • High stability

Product Description

LINQBOND SO-191GL is a single-component, moisture-curing, modified silicone adhesive, engineered for robust substrate bonding across diverse materials including polymers, metals, and silica-based composites.

LINQBOND SO-191GL formulation contains alkoxy functional groups, leading to rapid curing upon exposure to ambient atmospheric moisture.

Product Key Features:

  • Rapid Curing: Achieves cure state quickly through reaction with atmospheric moisture.
  • Odorless Formulation: Designed for use in environments sensitive to volatile organic compounds (VOCs).
  • Enhanced Adhesion Properties: Exhibits superior bond strength compared to conventional silicone adhesives.
  • Diverse Substrate Compatibility: Establishes strong bonds with a variety of materials, including plastics, metals, and glass.

Applications

  • Bonding components within electronic devices
  • General industrial bonding and sealing of glass components
Product Family
SO-191GL  

Catalog Product

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Packaging
TDS, SDS & Technical documents

Technical Specifications

General Properties
Appearance
Appearance
Appearance at room temperature.
 Liquid
Color
Color
The color
 Black
Specific Gravity
Specific Gravity
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume.

For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
 1.5
Physical Properties
Thixotropic index
Thixotropic index
Thixotropic Index is a ratio of a material s viscosity at two different speeds in Ambient temperature, generally different by a factor of ten.

A thixotropic material s viscosity will decrease as agitation or pressure is increased. It indicates the capability of a material to hold its shape. Mayonnaise is a great example of this. It holds its shape very well, but when a shear stress is applied, the material easily spreads.

It helps in choosing a material in accordance to the application, dispense method and viscosity of a material.
 4
Viscosity
Viscosity
Viscosity is a measurement of a fluid’s resistance to flow.

Viscosity is commonly measured in centiPoise (cP). One cP is defined as
the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP.

A product like honey would have a much higher viscosity -around 10,000 cPs-
compared to water. As a result, honey would flow much slower out of a tipped glass than
water would.

The viscosity of a material can be decreased with an increase in temperature in
order to better suit an application
 300,000 - 600,000 mPa.s
Chemical Properties
Water Absorption 0.24 %
Mechanical Properties
Hardness
Hardness
Hardness is a dimensionless quantity. There is no direct relationship between measurements in one scale and their equivalent in another scale or another hardness test.
Durometer (Shore 00) 80
Durometer (Shore A) 30
Elongation
Elongation
Elongation is the process of lengthening something.

It is a percentage that measures the initial, unstressed, length compared to the length of the material right before it breaks.

It is commonly referred to as Ultimate Elongation or Tensile Elongation at break.
 608 %
Tensile Strength
Tensile Strength
The tensile strength of a material is the maximum amount of tensile stress that it can withstand while being stretched or pulled before failure.

Some materials break very sharply, without plastic deformation, in what is called a brittle failure. Others, which are more ductile, including most metals, experience some plastic deformation and possibly necking before fracture.
Tensile Strength
Tensile Strength
Tensile strength determines the resistance of a material to break under tension and it measures how much elongating load (or tensile stress) it can handle before fracture.

To make it simple, it measures how much force we have to apply when pulling apart a material before it breaks.
 2.2 MPa
Thermal Properties
Coefficient of Thermal Expansion (CTE)
Coefficient of Thermal Expansion (CTE)
CTE (Coefficient of thermal expansion) is a material property that is indicative of the extent to which a material expands with a change in temperature. This can be a change in length, area or volume, depending on the material.

Knowing the CTE of the layers is helpful in analyzing stresses that might occur when a
system consists of an adhesive plus some other solid component.
Coefficient of Thermal Expansion (CTE) , α1
Coefficient of Thermal Expansion (CTE) , α1
CTE α1 (alpha 1) is the slope of the Coefficient of thermal expansion in a temperature range below the Glass transition temperature (Tg).

It explains how much a material will expand until it reaches Tg.
 114 ppm/°C
Glass Transition Temperature (Tg)
Glass Transition Temperature (Tg)
The glass transition temperature for organic adhesives is a temperature region where the polymers change from glassy and brittle to soft and rubbery. Increasing the temperature further continues the softening process as the viscosity drops too. Temperatures between the glass transition temperature and below the decomposition point of the adhesive are the best region for bonding.

The glass-transition temperature Tg of a material characterizes the range of temperatures over which this glass transition occurs.
 -40 °C
Temperature Range -40 - 200 °C
Thermal Conductivity
Thermal Conductivity
Thermal conductivity describes the ability of a material to conduct heat. It is required by power packages in order to dissipate heat and maintain stable electrical performance.

Thermal conductivity units are [W/(m K)] in the SI system and [Btu/(hr ft °F)] in the Imperial system.
 0.25 W/m.K
Other Properties
RoHS Compliant
RoHS Compliant
RoHS is a product level compliance based on a European Union Directive which restricts the Use of certain Hazardous Substances in Electrical and Electronic Equipment (RoHS).

Products compliant with this directive do not exceed the allowable amounts of the following restricted materials: lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB) and polybrominated diphenyl ethers (PBDE), with some limited exemptions
 Yes

Additional Information

Directions for Use

  1. Apply to a clean surface which should be free of dirt, grease or mold release. In many cases, a simple solvent wipe is sufficient.
  2. Pour or brush this product onto the substrates. It is not recommend to stir it onto the substrates to avoid formation of air bubbles. This product will be cured through air-drying but propeties depend on its thickness, curing temperatrue, and relative humidity.
  3. Use this product as soon as possible after opening the original package. When not in use, please replace the lid tightly and store in a cool and dry place.
  4. Cure time depends on part geometry, materials to be bonded, bondline thickness, and humidity. Cure schedule should be in accordance with actual specifications of production parts and equipment.
  5. Cured product is safe for contact with human skin.