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Urea-Formaldehyde

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by

Mariam Javeed

on 6 November 2016

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Transcript of Urea-Formaldehyde

What is
Urea- formaldehyde?
A non-transparent thermosetting plastic.
Produced from Urea and formaldehyde
High Tensile strength
Hard
Scratch-resistant
Stain-resistant
brittle
stiff
Properties
Image by Tom Mooring
Advantages
Urea-Formaldehyde

Other Uses
Electrical Casings
Tableware
Decorative worktop laminates
buttons
Disadvantages
resin can decompose:
in extremely humid conditions
in high temperatures,
cannot be used as an outdoor construction material.
noticeable increase in the formaldehyde levels in indoor air
toxic fumes given off when it cures
How it's Made
treating Urea with formaldehyde in and alkaline solution
creates mono and di-methoylol carbamates.
the carbamates undergo polycondensation.
Plastic is produced as powder or granules.

Uses
Urea-formaldehyde resin:
the manufacture of pressed wood products.
the bonding of plywood, particleboard and MDF.
can be manufactured at very low cost
Can be coloured
High surface hardness
enables the use for laminates
Quiz
1. Name 2 properties of Urea-formaldehyde
2. Name 3 uses of Urea-formaldehyde
3. Provide a disadvantage and an advantage for using Urea-formaldehyde.
4. What are the two carbamates formed when urea and formaldehyde are mixed in an alkaline solution?
Thank You for listening!
By: Mariam Javeed
Full transcript