M.M. AL-QAHATANI POLYURETHANE FACTORY (QPF), RIYADH, SAUDI ARABIA

M. M. AL-Qahatani Polyurethane Factory (QPF) is the only factory in the Kingdom of Saudi Arabia that is a manufacturer of polyurethane chemicals and applicator of Sprayed Polyurethane Foam System, licensed by the Ministry of Industry and Commerce, Kingdom of Saudi Arabia.

We have strong background and expertise in the field of polyurethane spray foam system. Our installation teams provide quick application, courteous service whilst always maintaining excellent quality standards.  We provide 10 years warranty and after sales service.

Our spray polyurethane foam can be applied effectively on pipes, tanks and roofs to get the right heat insulation U-value.

Polyurethane and related materials, what are they?

Commercial polyurethane are complex plastic products usually formed by the reactions of liquid isocyanate components with liquid polyol resin components.  In the preparation of polyurethane foams, the components may also contain cell-stabilizers, blowing agents, flammability retarding agents and catalysts.  The finished product is simply called polyurethane, urethane or sometimes isocyanate plastics.

History and types of polyurethane

The first commercial polyurethane plastics appeared in the early 1950's.  Growth of the industry was slow at first, but gradually gained momentum as the advantages offered by the new plastic material become more evident. 

Polyurethane generally falls into the following different categories.

     •   Rigid polyurethane      :     Furniture, decorations and doors

     •   Semi rigid                   :     Insulation for roofs, walls and pipes

     •   Soft foam                   :     Furniture, mattresses

     •   Elastomer                   :     Technical sophisticated application, and coating

URETHANE ROOFING SYSTEM

Our Polyurethane Roofing system provides complete solution in providing Thermal Insulation, Waterproofing and Strengthening roofing structures.

PRODUCTS

Polyurethane Roofing system consists application of two individual products:

• Polyurethane sprayed (SPF) in-situ and applied to the roofs.
• Elastomeric acrylic rubber (coating) for protection of the polyurethane foam and extra waterproofing tightness.

URETHANE ROOFING SYSTEM GENERAL DESCRIPTION

The Polyurethane Foam is made by two components (Polyol and Isocyanate) sprayed in situ provides the thermal insulation and waterproofing.

THE ELASTOMERIC RUBBER COATING PROVIDES

     •   A flexible coating

     •   Ultra violet protection

     •   Additional waterproofing

     •   Pounded water resistance

INSULATION REQUIREMENTS OF BUILDING

Most buildings in the Kingdom can be classified as low-rise flat roof, with large roof areas constantly exposed to the sun.

Insulating these roofs with 30mm Sprayed Polyurethane Foam will prevent 80% of the total heat absorption of the building, and reduce the complexity and cost of HVAC system. Hence occupants can enjoy maximum comfort with low noise level and reduced air movement. Polyurethane spray foam has closed cell structure which minimizes water absorption and prevents permeation by capillary action.

Polyurethane has the lowest thermal conductivity of any commercial insulation material as shown below:

     PRODUCT                                                   THERMAL CONDUCTIVITY (k-value)

     Sprayed Polyurethane Foam                                     0.020 W/m² K

     Expanded Polystyrene                                              0.033 W/m² K

     Glass Fiber                                                              0.034 W/m² K

     Cellular Glass                                                           0.042 W/m² K

     Perlite                                                                    0.050 W/m² K

     Foam Concrete                                                        0.055 W/m² K

DURABILITY OF THE PROTECTIVE COATING

• Dimensional stability
• Will not rot
• Does not attract vermin, nor is degraded by fungi or mildew
• Does not generate or retain odours
• Excellent adhesion to support
• Elastic and resistance properties not affected by weathering

DURABILITY OF THE PROTECTIVE COATING

     •   Resistance to accelerated weathering        •           Resistance to wind driven rain

     •   Elongation properties                               •           Hailstone resistance

     •   High temperature stability                         •           Excellent bond strength to foam

     •   Pounded water resistance                        

     •   Elastic and resistance properties not affected by weathering

ADVANTAGES OF POLYURETHANE FOAMS AND COATING

SImplicity and ease of application

• Only two products are required, foam and protective coating.

Lightweight

• Finished 3 to 3.5 kg per m²

Ease of maintenance

•  Coating can be applied by brush for instant repairs
•  Simply remove loose materials from the damaged surfaces and apply coating.

No joints

•   The foam is compact and jointless material
•   Protective coating strongly adheres to foam

Protection to all Roof Edges

• Urethane Foam and coating protects whole roof area, Including roof edges, and around drainage systems and sleeves.

Physical properties of the sprayed applied urethane

     Density                                                                                                       Test Method

     Machine applied foams give densities in the range of 30-55 kg/m³                         ASTM D-1622

     Thermal Conductivity at the rate of 25°C (77°F) W/m²K (B.T.U in/ft²/h/°F)

     Initial value                     0.020 (0.14)                                                               Anacon

     Aged value                      0.023 (0.16)                                                               Anacon

     Closed Cells

     Closed cell percentage, according to Beckmann pycnometer is above 93%            ASTM D-2856

     Compressive strength

     Tensile strength-appraised in parallel to the foam increasing

      up to 10% deletion is above 4.5 kg/cm²                                                            ASTM D-1621

     Tensile Strength

     Also appraised in a parallel sense of flowing:                                                 ASTM D-1623-9-1623

     5 kg/cm² approximately                                                        

     Water vapour transmission

     4.5 - 5.0 gr. cm/gr. cm per day/mm Hg                                                           ASTM C-355

     Dimensional stability, PCT

     - 30 OC, 24 hrs. Parallel 1

     + 100 OC, 24 hrs. Parallel less than 1.5                                                         ASTM D-2126

     Effects of Liquids and Chemicals

     Water, Saline Water, Hydrocarbons, Acids and other chemicals have no effect on

     the Polyurethane Foam.

      Behaviour under biological influence

     •   Mammals, birds, insects

         The foam is not attacked or destroyed by rodent or insects and it not

         destroyed by the beaks of birds.

     •   Mosses lichens, mould, fungi, bacteria have no effect on the foam and coating.