LOCTITE 4210
Harmonization Code : 3824.99.92.97 | Prepared binders for foundry molds or cores; chemical products and preparations of the chemical or allied industries (including those consisting of mixtures of natural products), not elsewhere specified or included: other : other : other
Main features
- Elastomer-Toughened Impact Resistance
- Low-Viscosity Thin-Gap Bonding
- Fast Multi-Substrate Fixturing
Product Description
LOCTITE 4210 is a black, low-viscosity, elastomer-toughened ethyl cyanoacrylate instant adhesive for bonding metals, plastics, and rubbers. The one-part liquid cures with atmospheric moisture and requires no mixing. Its toughened formulation adds impact and peel strength while improving resistance to heat and humidity. A Brookfield viscosity of 110 to 210 mPa s supports controlled flow into thin bond areas, and fixture time ranges from seconds to several minutes depending on substrate. The adhesive performs best in bond gaps around 0.05 mm and develops full chemical and solvent resistance after at least 24 hours.
Key features
- Elastomer-toughened performance: The formulation adds impact and peel strength with improved heat and humidity resistance.
- Low-viscosity one-part flow: A 110 to 210 mPa s viscosity supports controlled application in thin bond areas without mixing.
- Substrate-dependent rapid fixture: Documented fixture times range from 5 seconds on nitrile rubber to 150 seconds on degreased steel.
Applications / Suitable for
- Thin-gap bonding of metals
- Bonding supported plastics and rubbers
- Assemblies requiring improved peel, impact, heat, or humidity resistance
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Chemistry Type
Ethyl cyanoacrylate
Color
Black liquid
The color
Component System
One component
Describes the number of components that must be supplied, mixed, or activated before application or cure.
Specific Gravity
1.05
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.
Thermal Properties
Glass Transition Temperature (Tg)
165 °C
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.
Linear thermal expansion
80×10^-6 K -1
Thermal Conductivity
0.1 W/m.K
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.
Physical Properties
Viscosity
110 to 210 mPa.s
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
Electrical Properties
Dielectric Strength
28 kV/mm
Dielectric strength is measured in kV per mm and is calculated by the Breakdown voltage divided by the thickness of the tested material.
Those two properties go hand in hand and while Breakdown voltage is always thickness dependent, dielectric strength is a general material property.
As an example, the dielectric strength of Polyimide is 236 kV/mm. If we place 1mm of Polyimide between two electrodes, it will act as an insulator until the voltage between the electrodes reaches 236 kV. At this point it will start acting as a good conductor, causing sparks, potential punctures and current flow.
Surface Resistivity
10×10^15 Ohms/sq
Volume Resistivity
10×10^15 Ohms⋅cm
Volume resistivity, also called volume resistance, bulk resistance or bulk resistivity is a thickness dependent measurement of the resistivity of a material perpendicular to the plane of the surface.
Curing Conditions
Fixture Time
90 -150 seconds
Additional Information
Technical properties
As-supplied / before-processing properties
Typical values for the product before cure, application, or assembly.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Appearance | Black liquid | - | Uncured |
| Chemical type | Ethyl cyanoacrylate | - | As supplied |
| Components | One part | - | No mixing required |
| Specific gravity | 1.05 | - | 25 deg C |
| Viscosity | 110 to 210 | mPa s | Brookfield HBT, spindle 3, 50 rpm, 25 deg C |
| Cure mechanism | Humidity | - | Atmospheric moisture |
| Optimal storage | 2 to 8 | deg C | Unopened container in a dry location |
Technical properties
After-processing / final-state properties
Typical values for the cured or installed product under the listed conditions.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Fixture time, degreased steel | 90 to 150 | s | 22 deg C, 50% RH; time to 0.1 N/mm^2 shear strength |
| Fixture time, aluminum | 20 to 50 | s | 22 deg C, 50% RH; time to 0.1 N/mm^2 shear strength |
| Fixture time, nitrile rubber | 5 to 10 | s | 22 deg C, 50% RH; time to 0.1 N/mm^2 shear strength |
| Glass transition temperature | 165 | deg C | ASTM E 228; after 24 h at 22 deg C |
| Lap shear strength, grit-blasted steel | 23 to 27 | N/mm^2 | ISO 4587; cured 24 h at 22 deg C |
| Dielectric breakdown strength | 28 | kV/mm | IEC 60243-1; after 24 h at 22 deg C |
