LOCTITE 3296 | UV-curable Epoxy 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

LOCTITE 3296 | UV-curable Epoxy Adhesive

Main features

Fast UV cure
High Tg and low CTE
Low shrinkage during & after cure

Product Description

LOCTITE® 3296 is a dual-cure adhesive specifically developed for Automotive ADAS Optical Modules, including critical bonding applications like lens barrel-to-housing and lens housing-to-circuit board assemblies. This advanced adhesive is engineered for high-performance environments where precise alignment and long-term stability are essential. With a fast UV cure that can achieve primary bonding in as little as 3 seconds under adequate UV exposure, LOCTITE® 3296 significantly speeds up production cycles, reducing downtime and increasing throughput. Its exceptional thermal stability is highlighted by a Glass Transition Temperature (Tg) of 189°C, making it ideal for components exposed to intense heat. Its low Coefficient of Thermal Expansion (CTE) of 22.1 ppm/°C (between 25-125°C) and minimal shrinkage of 0.3% ensure that it maintains a strong, reliable bond even in demanding thermal conditions, minimizing the risk of component stress or misalignment over time.

Mechanically, LOCTITE® 3296 provides robust support with a Shore D hardness of 94 and an E-Modulus of 10,900 MPa at 25°C, offering excellent stiffness and durability for critical assemblies. This makes it particularly suited for optical modules where precise bonding is crucial for long-term optical clarity and alignment. LOCTITE® 3296 is well-suited for automated production environments, exhibiting low-viscosity behavior that ensures smooth, consistent dispensing. It is also designed to work without SVHCs and antimony, aligning with industry demands for environmentally responsible manufacturing processes.

Product Family
3296

1. Select Package Size

30 cc

2. Available Package Type

Syringe

Catalog Product

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

Shortest leadtime

Shipping in 6 - 8 weeks

Contact for Pricing

Packaging

TDS, SDS & Technical documents

Specifications
Additional Information

Technical Specifications

General Properties

Density (g)

1.8 g/cm3

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 @ -20°C	183 days

Physical Properties

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

33,700 mPa.s

Young's modulus

10,900 MPa

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 D)	94

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.

22.1 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.

189 °C