Polyurethane Spray Blend Polyols 
 VS-3  is spray blend polyols, blowing agent is 245fa instead of HCFC-141B, it reacts with isocyanate to produce foam which has excellent performances, which are as follows,   1) Fine and uniformity cells
   2) Low thermal conductivity
   3) Perfect flame resistance
   4) Good low temperature dimensional stability.
 It applies to all kinds of thermal insulation engineering which uses the spray technology, such as cold rooms, pots, large-scale pipelines etc.  Physical Properties    	 		 			Appearance                    			Hydroxyl Value                mgKOH/g  			Dynamic Viscosity (25 ºC)       mpa.s  			Specific gravity (20 ºC )           g/ml  			Storage Temperature             ºC  			Storage Stability               month |  			Pale yellow to brown viscous liquid  			200-300  			100-200  			1.12-1.20  			10-25  			6 |  		
 	 
    Recommended Ratio    	 		 			|   |  			pbw |  		
 		 			Vspray-3 blend polyols  			Isocyanate |  			100  			100-105 |  		
 	 
    Reactivity Characteristics (The temperature of the system is 20ºC,and the exact value varied depending on processing condition)    	 		 			Cream Time                  s  			Gel Time                     s |  			3-5  			6-10 |  		
 	 
    Foam Performances    	 		 			| Items |  			Test Method |  			Index |  		
 		 			Spray Density                  			Closed-cell Rate            			Initial Thermal Conductivity(15ºC)         			Compressive Strength  			Adhesive Strength     			Elongation at break  			Dimentional Stability  24h  -20ºC   			      24h   70ºC   			Water Absorption                       			Oxygen Index |  			GB 6343  			GB 10799  			GB 3399  			GB/T8813  			GB/T16777  			GB/T9641  			GB/T8811  			  			GB 8810  			GB 8624 |  			    30-40kg/m3  			  ≥90%  			      ≤24mW/(m.K)  			  ≥150kPa  			  ≥120kPa  			  ≥10%  			  ≤1%  			              ≤1.5%  			  ≤3%  			  ≥26 |  		
 	 
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