351 / 365
© 2014 Foundation Supportworks
®
,
Inc.
All Rights Reserved
p 351
Chapter 5
PolyLEVEL
®
Polyurethane Foam and Resin
APPENDIX 5A
TECHNICAL INFORMATION
PolyLEVEL
®
Trench-Breaker
Technical Information
Description
PolyLEVEL
®
Trench-Breaker is a two-component,
water blown, nominal 2.2pcf density, polyurethane
foam system designed for exterior applications
around utilities and pipelines.
PolyLEVEL
®
Trench-Breaker is applied as a
liquid mixture that reacts almost immediately
to expand approximately 35 times in volume in
15 to 20 seconds. PolyLEVEL
®
Trench-Breaker
exhibits low exothermic reaction temperature
and therefore can be placed in continuous,
successive lifts well beyond 2 inches in thickness
without danger of charring or ignition.
Typical Resin Properties
Trench-Breaker R Trench-Breaker A
Viscosity
(1)
800 cps
225 cps
Unit Weight
9.3 lb/gal
10.25 lb/gal
Shelf Life
6 months
6 months
Mix Ratio
Trench-Breaker R Trench-Breaker A
By Weight
100 parts
110 parts
By Volume
100 parts
100 parts
Typical Reaction Physical Properties
Cream Time
(1)
4.5 sec
Rise Time
(1)
17 sec
Typical In-Place Density
2.2 pcf
Tensile Strength (ASTM D1623)
(2)
71 psi
Resistance to Mold and Mildew
Excellent
(1)
At 77°F
(2)
Average value from laboratory testing and should serve only as
a guideline.
Storage and Cleanup
Shelf life is 6 months, in original, unopened
factory containers, under normal storage
conditions of 55° to 85° F. Do not store in direct
sunlight. Keep drums tightly closed when not in
use. Cured product may be disposed of without
restriction. Excess liquid “A” and “R” material
should be mixed together and allowed to cure,
then disposed of in the normal manner.
Safe Handling of Liquid Components
Use caution in removing caps and bungs from the
container. Loosen caps and bungs first to let any
built up gas escape before completely removing.
Avoid prolonged breathing of vapors. In case of
chemical contact with eyes, flush with water for
at least 15 minutes and get medical attention.
For further information refer to “MDI-Based
Polyurethane Foam Systems: Guidelines for
Safe Handling and Disposal” publication AX-119
published by the Center for the Polyurethanes
Industry 1300 Wilson Blvd, Suite 800, Arlington,
VA 22209.
Caution
Polyurethane products manufactured or
produced from this liquid system may present
a serious fire hazard if improperly used or
allowed to remain exposed or unprotected. The
character and magnitude of any such hazard will
depend on a broad range of factors which are
controlled and influenced by the manufacturing
and production process, by the mode of
application or installation and by the function
and usage of the particular product.
Any
flammability rating or reference contained
in this or other PolyLEVEL
®
Trench-Breaker
literature is not intended to reflect hazards
presented by this or any other material under
actual fire conditions. These ratings are used