Two Part Polyurethane Resin

Product Detail

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Low Viscosity Polyurethane Potting Compound SP2602

?Detailed Product Description


SP2602 is two component no solvent RTV/Heating curing resin elastomer compound, mainly for using two component sealing, and potting field.


Features


1.Low viscosity, easily process

2.Excellent performance on low-temperature and aging

3.Excellent and stably electrical dielectric

4.Very low Water absorption 

5.Good adhere to most metals and plastics

Usage


It’s specifically formulated for sealing & potting of water permeable, communications equipment, junction boxes, transformers, electronic instrument tray components, electronic ignition controllers electronic sensors etc

?Data Table

Model Number	Resin		Catalyst
	SP2602A		SP2602B
Appearance	Black Fluid		Brown Fluid
Viscosity, cps(25?)	800 ± 200		100± 50
Gravity, g/cm3	0.96±0.05		1.17±0.05
Mixing ratio, by weight	A : B = 2.8 :1
Working time, mins	50
Curing time, hrs	5
Hardness, shore A	A:B=2.8:1	67
	A:B=4:1	42
Water absorption, after 30 days immersion	< 0.15 %
Dielectric strength, kV/mm, 25?	>18
Volume resistivity, DC500V,O·CM	1×1012
Dielectric loss factor, 50HZ	0.02
Working Temperature, ?	-60~100
MAX Temperature, Short  time,(UP to 0.5hr ?	115

Note:

?All data above were tested under standardized condition. The data is with 200g sealant testing feedback

?All data listed in the chart were for the generalized item in the series; please refer to the related data sheet for special items.

?Storage condition has a direct impact to the products’ shelf life, Please refer to the instruction for special items’ storing.

Cup foam test


Testing condition , stirring speed: 1500rpm, Beater diameter: 50mm,Cups volume: 250ml

Ratio of weight (A/B)	2.8 / 1	G
Material temperature	23	°C
Stirring time	25	S
No-flowing time	45	Min

Note:The weight of sealant is 200g.

The Operation time of SP2601: 25mins, No-flowing time 45mins, When 70mins, the hard ness is shore A 10.


The Operation time of SP2601K: 20mins, No-flowing time 35mins, When 50mins, the hardness is shore A 10.

The Operation time of SP2601KK: 10mins, No-flowing time 20mins, When 30mins, the hardness is shore A 10.

The curing speed under different conditions


The curing speed of SP2601(the sealant is 500g, A:B = 2.8 : 1 )



?Operation

Equipment operation process

Material preparation: Stirring in the original drum, then pouring into dispenser.

To avoid bubbles inside of finished products, both tank should be usually kept 3 to 5 minutes under the vacuum pressure 0-2mmHg.

Max tolerance: Mixing proportion of deviation may affect mechanical properties, tolerance should be less than 0.5%.


Other: Through the production, should always maintain the tank airtight . the compressed gas should be dry if need, otherwise part B will become sticky, and influence the mechanical properties.


Suggestion of molding condition


Machine  


Maxing method                

Material temperature 

Part A    25-30 ?

Part B    25-30 ?

low pressure Pouring machine (Gear pumps or

volumetric metering pumps or plunger ) 

Recommend to use a static or dynamic mixer   

Equipment anti-curing time setting : 

The operation time of glue: 25-35mins, its equipment anti-curing spit time settings control within 10mins

Manual process

1.Temperature: Before using, keep the material under 25± ? to ensure its reactivity and viscosity.

2.Mixing: weigh the material at a ratio according to the above.

3.Preparation: Dry all containers and mould in 60 ? oven for 1 hours to remove moisture.

4.Process: put A and B into a container. Mixing 1-2 minutes. Degassing under 0.1 Mp negative  pressure to avoid the bubble. then potting smoothly. Should avoid the excessive speed to involving into air bubbles. 

5.Cleaning: cleaning the containers by organic solvents, such as acetone and chloroform,etc.

Bagged PU operation process


1.Torn aluminum foil, please check if there are obvious bulging of AB materials;bulging is failed product.

2.Take our spacer bars between AB material, mixing AB material. Knead AB material 2-3 minutes to mix it evenly, tear PE bags from the incision, pour the mixed material into the container. Curing time will need about 50 minutes at room temperature 25 ?. No viscidity on the surface.

?Package 

Package                            

Each part is 200kg/pail         Transported as general chemical 

?Storage

1. Bucket: Unopened material should be stored in good sealing of the barrel, to avoid moisture intrusion, affecting quality of raw materials. Opened material should be used up as soon as possible.

Store in a cool, dry area, avoid direct sunlight; storage temperature: 10-30 ?, 

Shelf life: A: 12 months, B : 12 months.

2. Aluminum foil bag : The shelf life of unopened bags is 2 years; this package is vacuum plastic packaging, if aluminum foil bags in storage period has bulging phenomenon, regarded as defective product, it can not be used; please use up within 3 hours after opened foil bags. 

?Safety Operation Material


MSDS isn't included here. Please read TDS, MSDS and label carefully before operation.You can get MSDS from Sepuna or other distributors, or mail to service center sepuna@sepuna.cn, or call +86-400-882-1323.


?Product Warranty


All product properties and application details based on information believe to be reliable and accurate. But you still need to test its property and safety before application. The advices we supply don't apply in any circumstances. Sepuna don't make assurance of any other applications outside the specification until Sepuna supply a special written guarantee. Sepuna is only responsible to replace or refund if this product is defective within the warranty period stated above. Sepuna makes it clear that will not be liable of any accidents.