• RK-1300
• RK-1500
• RK-7000
• Easy-Mix PE-PP

WEICON Structural Adhesives

high strength, residual elasticity, impact resistant

WEICON RK Construction Adhesives are 2-component systems based on methacrylate, which cure fast at room temperature. Both systems are processed in the “no-mix” procedure, i.e. a mix of both components (adhesive and activator) is not necessary. Polymerization starts as soon as the adhesive- and activator-wetted components are joined together.

WEICON RK Construction Adhesives allow high-strength bonding of different materials:

• Metals (also coated), such as steel, aluminium, copper, zinc, alloys, as well as ferrites (ferromagnetic material)
• Plastics*, such as ABS, polystyrene, hard PVC, poly- carbonate, polyphenylene oxide, polyester moulding compounds
• Fibre composite materials (GRP, CRP, fibreglass etc.)
• Wood and cellulose materials (e.g. MDF)
• Glass, ceramics and stone

* Polyamide, Teflon® and polyolefin etc. only after special surface treatment, for example using fluoridation, low-pressure plasma, corona, flame impingement etc.

Compared to other joining/fixing procedures WEICON RK Construction Adhesives have many advantages:

• Conventional fasteners are no longer necessary.
• Unlike in the case of welding and soldering, there are no changes in the material surfaces.
• Tensioning of the materials caused by thermal or mechanical stress does not occur.
• The specific material characteristics of different materials remain the same.
• By using newly developed, thinner and lighter materials, a simpler and more cost-efficient construction can often be realized, since these materials can only be joined with adhesives.
• When cured, the adhesive automatically forms a leak-proof coating, which prevents fretting corrosion.
• When joining different metals no contact corrosion is formed.

WEICON RK Construction Adhesives feature special product-specific characteristics:

• Processing in the “no-mix” procedure
• Quick and high initial bonding strength
• Residual elasticity and impact resistance
• Applicable at a large range of temperatures
• Ageing resistant

As a result, there are numerous areas of application, in particular during assembly and in industrial processing.

Due to the “no-mix” procedure and the quick, high initial bonding strength, WEICON RK Construction Adhesives are especially suited for manufacturing processes with staggered assembly and positioning processes and high cycle times during serial production.

Product descriptions, technical data, as well as information on processing and storage can be found on the following brochures.

>> Brochure/ Technical data "RK-1300/RK-1500"
>> Brochure/ Technical data "RK-7000"

WEICON Construction Adhesives RK-1300, RK-1500 and RK-7000 can be applied universally; the type selection is made according to the special requirements “on site”.

Pre-treatment of surfaces

To ensure perfect bonding, the surfaces to be joined must be clean and dry (to clean and degrease use Cleaner S or Plastic Cleaner). The highest strength values can be achieved through additional pre-treatment of the surfaces, such as roughening using blasting or abrasive agents. Several plastics, in particular polyamide, Teflon^®, polyolefin etc. are only to be bonded after special surface treatment, for example using fluoridation, low-pressure plasma, corona, flame impingement etc.

* Teflon^® = registered trademark E.I. Du Pont

Processing of the RK Activator

The RK Activator is applied, depending on the size of the bonding gap, on either one side or both sides of the surfaces to be bonded (brush, spray, dip). In case of bond lines with a max. of 0.4 mm in width, the Activator only needs to be applied on one side, for bond lines of up to a max. of 0.8 mm in width and/or rough, porous or passive surfaces (chrome, nickel etc) the Activator must be applied on both sides.
For smooth plastic and metal surfaces, approx. 30 g/m² is necessary, for rough and porous surfaces up to 150 g/m² of Activator may be necessary. The evaporation time at room temperature (+20°C) is at least 5 minutes.
A significant advantage to other adhesive systems is that the coated components can be stored up to 30 days at room temperature (+20°C) without loosing effectiveness.

Processing of the RK Adhesive

The Adhesive is applied only on one side and normally on the surface which is not coated with Activator. The width of the bond line can be up to 0.80 mm (only if the Activator is applied on both sides). Bond lines of 0.15 mm to 0.25 mm in width always have the highest tensile shear strength.

Processing temperature

The processing should take place at room temperature (approx. +20°C). Higher temperatures, e.g. +40°C shorten the positioning and curing times by approx. 30%, lower temperatures of approx. +10°C increase the respective times by approx. 50% and up to +5°C almost no reaction occurs anymore.

Physiological properties / health and safety at work

WEICON RK Construction Adhesives, when properly handled and completely cured, are toxicologically essentially harmless. When using these adhesives, the physical, safety technical, toxicological and ecological data and regulations in our EC safety data sheets must be observed.

Storage

WEICON RK Construction Adhesives have a shelf life of at least 12 months if stored in a dry room at a constant temperature of approx. +20°C. At temperatures between +1°C and +7°C the shelf life can be extended up to 24 months. This applies for closed original units which have not been directly or indirectly exposed to sunrays. In case of storage temperatures exceeding +40°C and high humidity, the shelf-life is shortened to 6 months.

Important Note:
All specifications, recommendations and techncial data are based on laboratory tests under optimum conditions resp. on practical experience. They have been compiled most carefully. Nevertheless, a claim cannot be derived from them. We therefore recommend to carry out own tests before application. The user bears the only responsibility for non-appropriate or other than specified applications.