Polyurethane adhesives 2 components can be elastic or rigid adhesive, depending on the structure of thermoset or elastomer which acquires the adhesive once it has solidified or cured.
Basic Components of 2C Pur and polyreaction
Resin – Polyols with low molecular weight.
Hardener - low molecular weight prepolymers with isocyanate finishes.
The polyreaction conducted is by polyaddition, resulting in a lattice structure of thermoset polymer or elastomer polymer, producing rigid polyurethane adhesives for the first case and elastic polyurethane adhesives for second case.
Considerations of 2C Pur adhesives
Keep in mind the pot-life, due that it is a 2-component adhesive, after mixing the 2 components in the right proportions, it begins the curing process of the adhesive, an increase in temperature in the environment will also reduce the pot-life of the mixture.
Typical Properties of 2 components polyurethane adhesives
Mechanical characteristics
Elastic polyurethane adhesive:
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Elastomer structure
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Strength about 8 Mpa
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Maximum elongation over 600%
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Very good resistance to creep (long exposure to static loads).
Rigid polyurethane adhesive:
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Thermoset structure
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Strength about 25 Mpa
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Maximum elongation over 50%
Chemical properties
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They are sensitive to radiation U.V.
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Less resistance to chemicals that epoxy adhesives.
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They can be painted.
Polyurethane Adhesive Formulations
And
Production Process
Manufacturing Process of Solvent free polyurethane adhesive is not very complicated. For the production, there is need usable and tried a formulation, raw materials and mixing tank. For raw materials to be used, quantities to be used and ingredients usage rankings, you should decide to look into this formulation. Therefore, formulation and productıon methods of solvent free polyurethane adhesives are important. If you have not a good formulation, you cannot make healthy and efficient production of any solvent free polyurethane adhesive.
If you need any manufacturing formulations and production methods about
Two Component And Solvent Free
Polyurethane Adhesive
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