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Reference: viscosity, hardness

URETHANE SYSTEM

POLYOL 30211
ISOCYANATE 40008


DESCRIPTION

30211/40008 Urethane Potting System is a black, polybutadiene based, flexible, flame retardant urethane that is UL listed  for 94 V0 and 5VA at 1/4 in file number E211862.  Has a superior 0 rating for HWI, HAI & CTI. .

System Components:
30211 Part A with 40008 Part B.

USE

Designed for ambient cured applications requiring good hydrolytic stability, flame retardancy and flexibility. Designed for potting stress sensitive electronics (SMT).  The low initial viscosity and long gel time make this a viable system for automated production. Service temperature range from -60oC to 130oC.


PRODUCT DATA

Color:
        Polyol                                                                     Black
        Isocyanate                                                             Amber
        Mixed                                                                     Black

Working Time
200 grams @ 77F (25C)                                          30 minutes

Gel Time (Shyodu)
200 grams @ 77F (25C)                                         60 minutes

Cure Cycle
Ambient 77F (25C)                                                 24 Hours

Viscosity (ASTM D-2393)
        Polyol @ 77F (25C)                                         20,000 cps
        Isocyanate @ 77F (25C)                                         90 cps
        Mixed @ 77F (25C)                                            4,600 cps
        Mixed @ 100F (38C)                                          3,280 cps
        Mixed @ 120F (50C)                                          2,430 cps         


Density, lbs./gal. (specific gravity)
        Resin                                                                     12.3 (1.47)
        Hardener                                                                 9.1 (1.09)
        Mixed                                                                     11.7 (1.40)

Mixing Ratio
        By Weight                                             100 parts resin 18.4 parts hardener
        By Volume                                                4 part resin to 1 part hardener

Hardness, Shore A
         Overnight cure                                                          40

Shelf Life
Store cool and dry                                                         6 months

Flammability
UL 94V-0 @ 1/2"                                                             Passes

Tg, Glass Transition Temperature                             - 63C


Thermal Conductivity,  BTU-in/hr-ft2-oF                  3.06

ELECTRICAL PROPERTIES

Dielectric Strength, volts/mil                                      350

Volume Resistivity                                                       4.2 X 1012

Dielectric  Constant,  1k Hz                                        5.14

Dissipation Factor, 1k Hz                                           0.040

Comparative Tracking Index (CTI)                             0


Customer Service (303) 617-3094

06/03/09

 

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Last Modified: March 28, 2015