TECHNICAL DATA & EXCUTED PROJECTS BY SITAF SAUDI.CO.LTD.
DATED: FROM 1978 UP TO 2007(click to view the list of all executed projects)
TECHNICAL DATA
Polyurethane chemicals
The Texaco Insulation Products is involved in the Polyurethane industry since long and is active in developing tailor made formulas for specific applications. Polyurethane chemistry is based on the ability of the isocyanate group (-NCO) to react with hydroxyl compounds. Polyurethane is formed by combing two reactive, low molecular and polyfunctional starting components together in a polyaddition reaction, which results in the formation of high molecular structures. The chemical components involved in the reaction are “POPYISOYANATES” and polyfunctional compounds with terminal hydroxyl groups, i.e. “POLYOLS”. The exothermic reaction is accelerated by the use of catalysts.
The information data of the two major components is as follows:
A- POLYISOCYANATE (MDI)
(DIPHENYLMETHANE DIISOCYANATE)(MDI) is a liquid, dark brown mixture of diphenlym ethane diisocyanate with isomers and homologues of higher functionality.
TYPICAL PROPERTIES
1- NCO CONTENT = 30 to 32%
2- VISCOSITY (AT 25* C ) = 550 + 75 m Pa.S
3-ACIDITY (as HCI ) = 100 ppm
4- TOTAL CHLORINE CONTENT = > 0.5 by weight
5- PHENLY ISOCYANATE CONTENT = > 50 ppm
6- SPECIFIC HEAT = 1.51 Kj/Kg K
7- COEFFICIENT OF THERMAL EXPANSION = 6.59 x 10-4 K-1
8- FLASH POINT = Over 200o C
9- FIRE POINT = Over 200o C
10- FREEZING POINT = Below 10o C
11- VAPOUR DENSITY = 8.5
12- VAPOUR PRUSSRE = Below 10-4 mbar at 25oC
13- TLV = 0.2 mg/m3
ON-SITE POLYURETHANE SPRAY FOAM
SAPOLYOL 40 / 50 BRC
SAPOLYOL 50 / 60 BRC
Function
Polyol ( component A ) for the production of SAPOLYOL spray-on roofs. This system is suitable for the heat insulation and sealing of roofs, and as such has been tested and approved for building purposes.
Product Description
Composition : Preparation based on polyol incorporating flames retardants and blowing agent.
Hydroxyl number : 305 + 25
Density, 20 C* 1.28 g/ml
Viscosity, 25 C* 195+ 30 mPas
Water content > 0.2 % by weight
Processing : SAPOLYOL 40/50 & 50/60 is reacted in a 1 : 1 ratio with
SAPISO to produce the spray-on foam
Safety precautions during handling
SAPOYOL is a preparation based on polyols incorporating a flame retardant and blowing agent which is classified armful when swallowed. SAPOLYOL may cause slight to moderate irritation if it comes direct contact with the skin, the eyes and the mucus membrane, particularly if this contact is prolonged.Safety goggles and impermeable protective gloves should always be worn if there is a risk of direct exposure when handling SAPOLYOL. During spray application of this product, suitable respiratory protective equipment (e.g. fresh-air masks or the like ) should be worn in order to prevent the inhalation of spray fog. If spray fog is accidentally inhaled, doctor should be consulted immediately.Splashes in the eyes must be removed immediately by careful and through rinsing with plenty of water, if irritation occurs thereafter, doctor should be consulted. Splashes on the skin must be wiped off and the contaminated areas should be thoroughly washed with soap and water. Theseareas should then be treated with a good barrier cream.*To prevent further contact with the skin contaminated clothing should be changed immediately and thoroughly cleaned before reuse. SAPOLYOL is to be considered as “harmful when swallowed” and must therefore be kept away from foodstuffs.
Physiological properties :
Foam properties (Values measured on Specimen with skin zone):
Density 40-50 Kg /M3 50/60 Kg/M3
Compressive Strength 300+50 KN/M2 400 + 100 KN/M2Tensile Strength 350-450 KN/M2 450-550 KN/M2
Elongation at break 5.80-6.30% 6.30-6.50%
Water Absorption 1-2 (% by vol.) 1-1.5 (%by vol.)
High-temperature
dimensional stability
under load 1.2-4.0(%linear change ) 0.2-0.8(%linear change)
Low temperature
Dimensional stability 0.2-0.8 (%linear change) 0.2-0.8 (%linear change)Coefficient of Thermal
Conductivity 0.020-0.023 (w/mK) 0.020-0.023 (w/mK)
Performance Specifications :SAPOLYOL spray-on foam for roofs meets the following specifications :
* DIN 18 159 “ Plastic foam for on-site applications”
Part 1 : Spray-in-place polyurethane foam.* DIN 4012 “Fire performance of building materials”:
Part 1 : Flammability classification B2
Part 7 : Resistant to flying considers and radiant heat.* DIN 4062 “Sealants for concrete building materials”:
Rot resistant.* DIN 1048 “Test method for concrete building components
and AIB “Information sheet of the Research Association for road transport and Traffic”: watertight towards non-pressurized water.
*UEAtc Agreement for thermal insulation and sealing system for roofs.
Packing : Steel drums, 240 Kg netStorage : Stable for least 3 months.
The product must be stored at a temperature of about 20*C and protected against moisture.Handling : See material data sheet (MSDS) for additional handling information on SAPOLYOL.
CONCLUSION
Safe handling and hygienic practices can not be over-emphasized. When properly handled, none of the Urethane ingredients represent hazards of any great proportion. It is recommended that before a manufacturing operation is begun, all available sources mentioned above should be consulted, so that proper protective devices may be obtained and safe handling equipment for the particular operation be chosen. Under these conditions, it is only an accident, which can cause hazardous exposure to one of the Urethane ingredients, particularly the polyisocyanate. Adequate planning can prevent such accidents from occurring.
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P.U. SYSTEM ADVANTAGES
VERSUS CONVENTIONAL BUILT-UP ROOFING SYSTEM
We would like to draw your attention to the following points which are considered as advantages while using insitu Sprayed-P.U.-Foam System:
WATERPROOFING THICKNESS
The thickness of waterproofing membrane using SITAF-P.U.-SYSTEM is 40mm which is 10 times bigger than using 4mm standard bituminous membrane.
SAFETY OF WATERPROOFING
As known, the Sprayed P.U. Foam System offers a 100% safe surface, completely free from any kind of joints. By nature the whole roof is monolotically sprayed at once; but with the membrane type roofing, a joint occurs every 1 meter of surface area and this maximizes the human factor which could affect the quality of seam and eventually the water tightness and integrity of the whole waterproofing system.
MULTI-PURPOSE
The high density insitu Sprayed-P.U.-Foam is a multi-purpose application. In other words, the whole thickness of the layer acts as a waterproofing, thermal insulation, rust proofing and soundproofing coarse at the same time. No sloping screed will be required as the system is guaranteed even with zero (0) slope.
APPLIED DENSITY
The applied density of insitu sprayed P.U. foam will be 50-55 kg/m3 which is the highest compared to all other known thermal insulation material. This will reflect in less open cells, higher compressive & tensile strength and far better fluctural strength of the whole roof substrate especially in case of corrugated metal sheet roofing panels.
THERMAL CONDUCTIVITY
The P.U. Foam is known as the best & most efficient thermal insulation material. Please find the thermal insulation value which is offered by 40mm insitu P.U. as per the following technical evaluation.
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COMPARISON STUDY
HEAT INSULATION VALUE OFFERED
BY USING 40mm THICK SPRAYED P.U. FOAM
This study will show the different thickness required by 3 different types of heat insulation materials (Extruded Polystyrene Boards of Mineral Wool Blanket Versus Insitu Sprayed-P.U. Foam) to achieve the same heat insulation conductance (U-Value).
INSITU SPRAYED-P.U.-FOAM
k = coefficient of thermal conductivity= 0.02 w/m k
T = thickness of insulation in meter = 0.04 m (40 mm)U-Value = 0.5 w/m2 k
EXTRUDED POLYSTYRENE BOARDS
Type : ROOFMATE–SL
Density : 32 kg/m3
k : 0.032 w/m k at T = 24 c as per DOW Chemicals
table
U-value : Required = 0.5 w/m2 kT(Thickness) = 64 mm
MINERAL WOOL BOARDS
Type : AFICO HD SERIES BLANKET INSULATION
Density : 16 kg/m3
k : 0.039 w/m k at T = 24 c
U-value : 0.5 w/m2 kT (Thickness) = 78 mm
CONCLUSION
30mm thick Sprayed-P.U.-Foam gives the same insulation conductance U-value of 64mm thick Extruded Polystyrene Boards which means that P.U. Foam is 38% more efficient as a thermal insulation material.
Also, 40mm thick Sprayed-P.U. Foam gives the same thermal conductance U-value of a 78mm thick Mineral Wool Blanket which means that P.U. foam is 49% more efficient as a thermal insulation material.
