LOCTITE ABLESTIK 8387B

Harmonization Code : 3506.10.00.00 | 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

Main features

Fast cure
Aerospace applications
Glass attach for 3d sensors

Product Description

LOCTITE® ABLESTIK 8387B non conductive die attach adhesive has been formulated for use in high throughput die attach applications. It has an average filler size of less than 20um with a maximum of less than 30um and has been used for the glass attach of Optical and 3D sensors. It has been successfully used for lid attach in aerospace and defence applications and should pass the NASA outgassing standards if cured properly.

LOCTITE® ABLESTIK 8387B has good adhesion to glass, is jettable and has minimal adhesion change, post reliability. It can be fast cured using directed heat energy or hot plate curing techniques. In conventional box or convection conveyor oven curing, it will cure at temperatures as low as 100ºC.

Cure Schedule

2 minutes @ 150°C
30 minutes @ 100°C

Product Family
8387B

1. Select Package Type

5cc Syringe 10cc Syringe

Catalog Product

Unlike other products we offer, the products listed on this page cannot currently be ordered directly from the website.

Shortest leadtime

Contact for Pricing

Packaging

TDS, SDS & Technical documents

Specifications
Additional Information

Technical Specifications

General Properties

Shelf Life Shelf Life Shelf life is the amount of time after manufacturing that a product is guaranteed to retain its properties. It differs vastly per product and it is based on temperature and storage conditions. The properties can be guaranteed for the temperature and time range indicated on the TDS since those are the ones tested to be the best for the product.
Shelf Life @ -40°C	365 days

Work life @25°C

Work life @25°C
Work life is the amount of time we have to work with a material until it is no longer able to be easily worked and applied on a substrate.

It is based on the change in viscosity and it can rely on the application requirements.

48 hours

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.

4.5

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

9,500 mPa.s

Chemical Properties

Ionic Content
Chloride (Cl-) Chloride (Cl-) The amount of Chloride (Cl-) ion extracted from the product in parts per million (ppm)	300 ppm
Potassium (K+) Potassium (K+) The amount of Potassium (K+) ion extracted from the product in parts per million (ppm)	5 ppm
Sodium (Na+) Sodium (Na+) The amount of Sodium (Na+) ion extracted from the product in parts per million (ppm)	10 ppm

Mechanical Properties

Shear strength
Shear Strength @25°C	27 N/mm2
Shear Strength @250°C	1.9 N/mm2

Tensile Modulus Tensile Modulus Tensile modulus is a mechanical property that measures the stiffness of an elastic material. It is the slope of stress / strain curve of a material under direct tensile loading. It can be used to predict the elongation or elastic deformation of an object as long as the stress is less than the tensile strength of the material. Elastic deformation is caused by stretching the bonds between atoms and the deformation can be reversed when the load is removed. Tensile modulus is affected by temperature and is an important engineering attribute since we generally want to keep elastic deformation as small as possible.
Tensile Modulus @-65°C	2,840 N/mm2
Tensile Modulus @150°C	77 N/mm2
Tensile Modulus @200°C	59 N/mm2
Tensile Modulus @25°C	1,400 N/mm2
Tensile Modulus @250°C	53 N/mm2

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.	94 ppm/°C
Coefficient of Thermal Expansion (CTE), α2 Coefficient of Thermal Expansion (CTE), α2 CTE α2 (alpha 2) is the slope of the Coefficient of thermal expansion in a temperature range above the Glass transition temperature (Tg). It explains the extent to which a material will expand after it passes Tg.	165 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.

96 °C

Additional Information

Thawing Die attach with a cartridge heater

You should never heat up a cartridge from a frozen material, as this will highly impact work life and reduce it to a few hours, and in addition, particles will start to agglomerate. Especially with highly reactive and fast-curing products like 8387B, heating syringes will only make dispensing performance worse. You can use a needle heater to a maximum of 45°C instead, so the bulk syringe won’t be exposed to heat for a longer time.

Fix die attach clogging with Auger valves

Auger equipment with long (10mm) needles has the potential to lead to clogging issues. You might be tempted to think that the material is the one to blame, while in fact, it is likely that you should just keep your process simple. The filler % in 8387B is not so high, but the problem is the very small and very long needle in combination with the screw master. The Musashi auger pitch is too big for this needle type, which means that it forces too much material per cycle through the needle creating stress and clogging. We suggest using Musashi equipment with simple time/pressure (T/P), especially since their T/P controller is very accurate in material repeatability. This is the best system in the world, so we always suggest using a Time/Pressure system if possible.