NECURON® K2

Single component polyurethane-based adhesive for NECURON®-modeling materials

Properties of the bond
The thermosetting glue joint is resistant to high temperatures and achieves highest bonding strength

Colour: colourless to yellowish-transparent
Base: isocyanate
Density: approx. 1.13 g/cm3
Consistancy: thin liquid
Packaging: tin container: 5 kg net

Application techniques
Processing conditions
The ideal application temperature is around 20° C. Do not use under +5° C. Surfaces must be clean, dry, free of dust and grease. Release agents must be removed from plastic surfaces.

Application methods: With spatula or hand roller from plastic squeeze bottle.

Application: In most cases a one sided application is sufficient.

Application quantity: 100 - 200 g/m2 according to the condition of material

Open time: approx. 90 minutes at 20°C
This period is reduced by high room temperatures, high humidity or the suppl of moisture.

Curing
The adhesive hardens to a water-resistant, solvent-resistant and semi-rigid adhesive film when exposed to humidity (from the air or materials being bonded). The cross-linking process can be accelerated by means of targeted moisture supply (water spray, approx. 20 g/m2) or by higher temperatures (40°C up to max. 70°C).

Pressing the parts
The cross-linking process takes place when sufficient pressure is applied to ensure contact with the surfaces to be bonded. The necessary pressure is dependent on the kind and size of the materials; a good joint fit should be ensured. The more intensive the cross-linking of the adhesive under pressure, the higher the subsequent loading ability.


The press times are depent on temperature and moisture supply. Guide values:

Temp. Press time
20°C -> 5 - 6 hrs 
40°C -> 2 - 3 hrs 
60°C -> 1 - 2 hrs

Exact times must be established for the particular application according to the conditions in question.



Subsequent processing of the bonded parts is possible after 1 day, final strength is achieved after approximatley 7 days.


NECURON® K2 can be stored in closed air-tight containers at 20°C for approx. 9 month. Keep in a cool and dry place and carefully protect from humidity. Opened containers shoul be used up as soon as possible. NECURON® K2 should be transported and stored at temperatures above -5°C.

Identification: identification required according to EU regulations, contains 4.4 diphenyl methane diisocyanate